CA2265114C - Multimode radio transmission system - Google Patents

Multimode radio transmission system Download PDF

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Publication number
CA2265114C
CA2265114C CA002265114A CA2265114A CA2265114C CA 2265114 C CA2265114 C CA 2265114C CA 002265114 A CA002265114 A CA 002265114A CA 2265114 A CA2265114 A CA 2265114A CA 2265114 C CA2265114 C CA 2265114C
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radio communication
differential information
information
numerical parameters
base station
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CA2265114A1 (en
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Hiroshi Harada
Masayuki Fujise
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Communications Research Laboratory
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers

Abstract

In order to utilize several radio communication systems with a radio terminal 1, by preparing the common modulator and demodulator part 2a and reconfigurable modulator and demodulator part 2b in advance and performing function selection means 4 with specified means of differential information 5 which information consists of the list of differential specification information of each radio communication system such as the tap coefficients of filter, frame format and the like, and their hardware address to allocate the information into digital signal processing hardware, the required radio communication systems are realized as users like.

Description

CA 02265114 2002-11-01Title of the Invention:Multi—mode Radio Transmission SystemBACKGROUND OF THE INVENTIONField of the Invention:The present invention relates to a multi-mode radio transmission system under environmentavailable by means of a different radio communication mode.Description of the prior art:In the present radio communication systems such as land mobile communication systems,broadcasting systems, and satellite communication systems, a common transmission mode has notbeen determined, and a communication system is utilized on the basis of various standards.For example, nowadays, in Japan, as digital mobile communication systems, PDC(PersonalDigital Cellular) system and PHS(l’ersonal Handy Phone) system are available. Moreover, even inEurope, GSM(Global System foriMobile Communications) system and the like has been operated.These systems looks different each other, however these systems are based of Quadraturemodulation.As shown in Figure 7, the Quadrature modulation is a method which can improve the transmissioncapacity more than two times with the use of two orthogonal axes alternatively at the samefrequency. In the concrete, we use a characteristics of orthogonality between sine and cosine wave,in which the integration value during one cycle becomes to be zero when we multiply sine wave bycosine wave and integrate theimultiplied value.In the configuration for a transmitter as shown in Figure 7, input transmission data signal is dividedinto two channels of Ich( In phase channel) and Qch (Quadrature Phase Channel). Then the data ofIch is multiplied by a signal generated from one sign wave source, and the data of Qch is multipliedby a signal which is phase-shifted‘ in 90 degrees for aforesaid sine signal. Finally, these two signalsof Ich and Qch are synthesized together.On the other hand, in a receiver, a signal is recovered by means of performing a reversible operationfor the transmitter. »As described above, in an environment, in which a plurality of radio communication systems exist,a user must possess a radio terminal for a radio communication service. _ _In other wards, in the case of- utilizing a plurality of communication services, a user must havemany radio terminals to all the radio communication systems. AIn order to reduce the number of terminal, it is prefer to be able to integrate a plurality of radio1CA 02265114 2002-11-01transmission mode into a radio terminal.For one of the solutions for the integration of several radio communication systems, "SoftwareRadio‘: concept has been proposed. In the software radio concept, we describe all fimctions formodulation and demodulation in each radio communication terminal as programs for Digital SignalProcessing Hardware(DSPH) like FPGA and DSP. By changing the programs in accordance withusers‘ request, we operate all radio communication system with a radio terminal.However, in conventional concept of software radio, we often change all the configurationprograms for a radio communication system whenever a radio transmission system must bechanged. _Moreover, the configuration program is written in a high level computer,-language like "C" languageor a low level computer language as assembler. Accordingly we must prepare several nonvolatilememories for storing a plurality of programs. From the viewpoint of costs, we needs more time fordelivering the software radio as the consumer products.Further, the other method exists, in which all functions configured several radio communicationsystems has already implemented the radio communication terminal in advance._However, in this case, we must equip all the’ components in a radio terminal whether users use allcommunication systems or not. Therefore from the viewpoint of cost and miniaturizing, the methodis not the best solution for the integration of radio terminal.Moreover, in advance, we write all functions of transmitter and receiver for a radio communicationsystem into a ROM( Read Only Memory) card. Then, by exchange such ROM cards, we realizemultimode terminal.But, in the case of usage of ROM card, users always must have several ROM cards.From the viewpoint of portability, we need refinement of the idea.SUMMARY OF THE INVENTIONThe present invention carried out in order to solve the above—mentioned problem. In the invention,there is a technical characteristic in a point of aiming a difference of system configuration betweenthe recent radio communications. .Concretely, in PHS system and the other systems, the Quadrature modulator is common function.And the difference between the radio communication systems is following;In the transmitter side, encoding method for data, data transmission speed, frame format (aninformation for using any part as synchronization and for using any part as data) and shape of afilter are illustrated.On the other hand, in receiver side, a configuration method of a filter, a format for__a transmittedsignal, a synchronization method for data, and a decoding method for data, are illustrated.21015202530CA 02265114 2002-11-01Accordingly, we own common functions used commonly in each radio communication systemas common modulation and demodulation functions, and different functions in each radiocommunication system are given as a differential information.In order to solve this problem, in the present invention, a difference part (a differentialmodulation and demodulation function part) between radio communication systems to be realizedis made out for a general-purpose or reconfigurable circuit (for example, a circuit to be able tochange a filter configuration freely only by means of a coefficient information for a filter)capable to drive only by means of a selective differential information, and the present inventionis so that a differential modulation and demodulation function part may be to set a- functioncorresponding to a specific communication system by means of supplying a correspondingselective differential information to a communication tenninal for specifying a radiocommunication system which a user would like to utilize or can utilize.Further, although a differential information consists of an address onto a digital signal processinghardware to carry out a modulation and demodulation scheme corresponding to each lcind ofradio communication system and airewritable and changeable information for a different partbetween radio communication modulation and demodulation systems paid attention to differenceof each kind of modulation and demodulation scheme abovementioned to store in aforesaidaddress, said infonnation is not a program.According to an aspect of the present invention, under the circumstance in which several radiocommunication systems can be utilized, in order to realize such systems by a communicationterminal, several modulation and demodulation schemes of the necessary common modulationand demodulation function part such as an orthogonal phase modulator, an automatic gain controlpart, and quasi-synchronized orthogonal detector and the reconfigurable modulation anddemodulation function part which can realize all components related to modulation anddemodulation except for the components of common function part by changing parameters areinstalled at a radio communication terminal. Then with functional selective means which canbe activated by providing the selective differential infonnation, which comprises valuablecoefficient information writing a differential part between each kind of radio modulation anddemodulation scheme, and their address on the DSPH into aforesaid reconfigurable modulationand demodulation function part, we realize our required radio communication terminal.Moreover, a selective differential information can be supplied from a base station in an area, inCA 02265114 2002-11-01which a radio terminal is used by download.According to another aspect of the present invention, under the circumstance in which severalradio communication systems can be utilized, in order to realize several modulation anddemodulation schemes of such systems by a communication terminal, the necessary commonmodulation and demodulation function part such as an orthogonal phase modulator, an automaticgain control part and quasi-3a ‘ 'CA 02265114 1999-05-25synchronized orthogonal detector, and the reconfigualable modulation and demodulationfimction part which can realize all components related to modulation and demodulation schemesexcept for the components of common function part by changing parameters, are installed at amobile base station. With functional selective means which can be activated by providing theselective differential information, which comprises variable coefficient information writing adifierent part between each kind of radio modulation and demodulation scheme and their address onthe DSPH from control station into aforesaid reconfiguable modulation and demodulationfunction part of a radio base station, the base station can realize several radio communicationsystem.As described above, by using the multimode terminal of present invention according to referring toclaim 1 ,It is easy to make the size of terminal small and light and reduce a producing cost, in comparisonwith installing a communication fimctional means for all of radio communication modes possible toutilize.Moreover, as for the selective information supplying to a fimctional selecting means in order toswitch a communication mode, it is a simple information only to select a function being elfectivewithin a different functional part, transferring from a base station via a radio becomes also to bepossible and storing beforehand to a terminal side is easy. Further, as a radio transmission systemaccording to claim 4, if a common fimctional part, a differential part and a fimctional selectingmeans are installed at a radio base station, the change of a communication mode at a radio stationbecomes to be possible .BRIEF DESCRIPTION OF THE DRAWINGSFigure I shows a functional block diagram for a radio terminal used at a radio transmission systemaccording to the present invention,Figure 2 shows an approximate configuration referring to the second embodyment to transmit froma base station to a mobile station,Figure 3 shows a fiinctional block for a base station or a mobile station used a radio transfer systemreferring to the second embodiment,Figure 4 show a filnctional block in a radio transmission system referring the third embodimentstoring a difierential to a terminal side,Figure 5 shows an approximate configuration referring to the fourth embodiment supplying adifferent information from a control station.Figure 6 shows a radio transmission and receiving system referring the fifth embodiment adaptedto a television system, for a next generation, and CA 02265114 2002-11-01Figure 7 shows a functional block fora transmitter and a receiver constituting a prior radiotransferring system.DESCRIPTION OF THE PREFERRED EMBODIMENTIf following embodiment may be referred, the present invention will be understood much moreclearly.Example-lFigure 1 is a fiinctional block diagram for a radio terminal used to a radio transmission system. asexample-1 and a radio terminal 1 have a communication terminal 1, a functional means 2, antenna 3,and a selective information specified means 5. ,Accordingly, the communication functional means 2 is an unit to have the common modulation anddemodulation function part 2a assembling common functional part a common function for eachcommunication mode (for example, an orthogonal phase modulator, an automatic gain control partfor receiving a signal, quasi-synchronized detecting part and the like) and the reconfiguablemodulation and demodulation furfction part 2b comprising a function (for example, a shape of afilter, a format for transferring a signal and the like) possible not to be common.The communication fiinctional means 2 is set so as to a specific communication system by means ofactivating only a fimctional realizing means within the reconfigurable modulation and demodulationpart 2b, in which the fimctional selecting means 4 is selected on the basis of a selectiveinformation specified by the specified means of differential information.In other words, for the radio communication systems configured by reconfigurable modulation anddemodulation part 2b, 1 KWe must prepare the deferential information in advance and by specifying the differentialinformation, the radio terminal 1 becomes the specified terminal.Accordingly, it is unnecessary to have many kinds of terminals depending to a prior service systemfor a portable telephone service, and any portable telephone services for any companies can beperformed by means of one terminal. ,Further, a differential information to select a function which can activate the reconfigurable part2b is a coeflicient information writing a differential part between each kind of radio modulation and‘demodulation scheme, and their address allocated on the DSPH.If a reconfigurable circuit possible to change the communication scheme only by means of thesenumerical value is made out beforehand within a digital signal processing hardware(DPSH), even inthe case of changing a system with a communication mode such as an informationtransmissionrate and the like thereafter, replacement for a system can be performed flexibly. .Example—2 .CA 02265114 1999-05-25In the example-l, a basic system was described.Figure 2 is an approximate configuration for a radio transmission system to transmit adifferential information from a base station to a mobile station.In this cxample-2, a differential information, that is a selective information, from a radio basestation is transmitted with the use of a radio broadcasting type, then mobile stations receiving thedifferential information establish modulation and demodulation scheme which the base stationadopted.Finally, the both stations start to communicate each other.As a differential information to transmit with the use of this radio broadcasting, only ancoefficient information such as tap coefficient for a filter, a coefficient to determine a shape of afilter, a coefficient to determine a tap coefficient for the sake of an equalization, ( in the case ofcarrying out Fourier transformation at a receiving side ) a coefficient to determine a length of FFTcode sequence information ( for CDMA ) and the like is illustrated.A capacity for these informations is quite small in comparison with the case of full download of allthe DSPH programs.First, when an user having a radio terminal enter into a cell, in which a communication is carriedout by some communication systems, the user receives differential information to determine somemodulation and demodulation method which is a petty information volume with the use of a controlchannel.This parameter is radiated in the state of a radio broadcasting from a base station. Moreover, asinformation volume is not so large, an error corrected data transmission scheme having muchredundancy bit is used. Thereafler, it is prefer to be able to transmit in the state of a free error withthe use of an easy modulation and demodulation method.For example, simple phase modulation of two values ( Binary Phase Shifi Keying: BPSK ) and thelike are enough.Moreover, in the case of receiving a differential information at a radio terminal, it is also necessaryto establish anyone of synchronization between a radio base station.Next, if synchronization is attained once, a differential information is received at a terminal, theterminal becomes to be a transmitter and a receiver corresponding to aforesaid commutation on thebasis of its information.Further, replacement for a system comprising only a differential information is carried out rapidly.Moreover, as a receiving information for replacement is finished in the state of small volume, evenin the case of transmitting a parameter information under inferior circumstance, the number forretransmission is finished in the state or small volume. Therefore the replacement becomes to becarried out anytime and anywhere. CA 02265114 1999-05-25Detail of a radio terminal to become a mobile station is as shown in Figure 3.This comprises two units roughly as described below.One unit is RF Unit for treating a part having high frequency more than a intermediate frequency(IF ) band and another unit is base band unit for modulating demodulation by means of a digitalsignal processing having much low frequency.RF unit and base band unit are divided each into two module even within its inside, and as the result,one is TX module functioning at a communication part and another is RX module functioning at areceiving part, respectively.In TX module in RF unit, an orthogonal phase modulation is carried out by means of converting atransmitted signal as a digital signal from TX module of base band unit to an analog signal (DigitalAnalog converter : D/A) on the IF ban.Moreover, after control for output power has been carried out, the analogue data of IF band iscarried out from transmitting antenna by means of converting a transmitting signal having a highfrequency of RF band.Further, RX module in RF unit, after analog radio frequency signal received has been converted tolow frequency to treat easily, gain control is carried out by means of a part of automatic gain control(AGC) as to become the level of digital processing easily,And as the result, its signal is detected in the state of wave with the use of a rough orthogonalsignal.This is said as "Quasi—synchronized Orthogonal Detector".Thereafier, separated signal as two orthogonal components of Ich and Qch are sent out to base bandunit by means of converting a digital signal with the use of "Analogue to Digital Converter: A/D.In this case, in order to carry out a digital signal processing much strictly, it is prefer for samplingspeed of this A/D converter to be sampling speed more times faster than a speed for aninformation signal and to adopt many sample data.At one side, in TX module in base band unit, transmitting data frame format (Frame constructioncircuit), a filter for limiting transmitted band area, and modulation scheme, are decided on the basisof a dilferential information input from outside, and as the result, a transmitted signal processed inthe digital state is transmitted for RF unit.On the other hand, in RX module of base band unit, after a synchronizing timing needed toreceiving a signal on the basis of a differential information input from outside, a filter form forlimiting a hand area at a receiving signal side, a method for equalization, and a method fordemodulation, are decided, in RX module of RF unit, the transmitted data from a orthogonal signalof receiving signal converted to a digital signal are demodulated.Each function determined by abovementined differential information in basic band unit, is7 CA 02265114 2002-11-01reconfiigurable function, and the other function inband and RF unit is common function.Example-4Figure 4 is a functional block diagram in a radio transmitting system referring to example-3 so as tostore a differential information at a terminal side. In the present example, a differentialinformation referring to modulation and demodulation scheme for the use of communicationapparatus of each company is stored in the form of database at a radio terminal side. Moreover, thepresent example is multi-mode mobile communication system, in which a user can utilize asystems for a plurality of companies only with the use of a switch attached to a portable telephone,of driving type with a user. ' _In the difference between the present example and abovementioned example-2, database, in whicha differential information for the use of communication apparatuses of each company is input,are input beforehand. For example, a corresponding differential information for the use of.communication apparatus is input from data base to base—band unit as data and a synchronizinginformation to constitute a transmitter and a receiver by means of selecting buttons from "A"to "D" with an user, and as the result, the desired modulating demodulation scheme can be attained.Moreover, after a communication modehas been established, a communication is carried out bymeans of the same method as each abovementioned embodiment.Further, in the present embodiment, a user can select a communication mode optionally and it hasadvantage that there is unnecessary to carry out a communication to a radio base station until acommunication mode will be established.Example 5Figure 5 is an approximate configuration referring to example -4. In which replacement for acommunication mode at a radio base station is performed.In the present embodiment, if it is assumed that a plurality of radio base stations (RBS) arecontrolled concentrically with the use of a control station (CS), when a system at a radio basestation has been replaced, the control station(CS) transmits its differential information for eachradio base station (RBS) via a wired system such as an optical fiber and the like. _The control station (CS) has a diode for the sake of propagating to a transmission line by means ofchanging differential information to an optical signal, and the radio base station (RBS) equips RPunit and a base—band unit together with a photo diode and the like, by which a received photosignal changes an electrical signal.The radio base station (RBS ), that is, constitutes a transmitter and a receiver on the basis of an up-I to-date differential information received from the control station (CS ). .Accordingly, as the radio basic station (RBS) can be made to correspond to g_arious radiocommunication mode corresponding to a differential information transmitted from the control8CA 02265114 1999-05-25station (CS), it becomes to be able to construct a system that the radio base station (RBS) iscontrolled concentrically with the use of the control station(C S).Example-5Figure 6 shows example-5 in the case of using the present invention to a television system of nextgeneration.Nowadays, an orthogonal frequency division multiplex transmission (OFDM) is proposed as adigital broadcasting system, having large capacity, of next generation.As its reason, it is illustrated that a signal transmitted in a radio communication receives that only adirect wave from a transmitting side but also delay wave by means of reflection such as a buildingand the like.Moreover, as a transmitting speed for an information signal becomes higher, this delay wavebecomes to be interference wave to the other information signal, and the delay waves prevent asmooth communication referring to an information signal.Further, an orthogonal frequency division multiple, (OFDM) transmission is one of the scheme totransmit such a high-speed data under multi-path environment.In OFDM, a high speed data is transmitted by means of dividing into a signal with a low speed, inwhich there is a little for an influence of a delayed wave. Then a transmission is carried out bymeans of multiplexing for a frequency division with the use of an Inverse Fast Fouriertransformation(IFFT) in order to multiplex their divided signals.In a receiving side, the transmitting OFDM date is demodulated by the multiplex with the use of aFast Fourier transform (TFT).As described above, there is less influence with interference by means of dividing an informationsignal with a high speed into and information signal with a slow speed.However, in a radio broadcasting with a television all over the worlds, although a communicationsystem (modulation and demodulation scheme) has already fixed a delayed specification isdifferent.However, the difference of the communication system is only the number of a step number with aInverse Fast Fourier Transform in the transmitter side, a guard time for delayed waves, a method forsynchronization in receiving side, the step number for a Fourier Transform in the receiver side and amethod for an equalization. A transmitting and receiving system for all radio broadcastingbecomes to be able to realize.If abovementinoed systems is changed to so as to adopt each radio broadcasting system as adifferent fiinction part, that is, it is possible to for a common television receiver in order tocorrespond to various radio broadcasting systems.Accordingly, functions such as IFFT and FFT are included within a base-band unit and a receiving9CA 02265114 2002-11-01system with all television and radio broadcasting becomes to be possible.Further, in the present example-4, although a configuration possible to transmit from a televisionreceiver, and become a receiving terminal, is illustrated for the cable television system possible tocommunicate at two-way, However, for the television set, we use only RX module.As described above, according to a radio transmission system referring to thepresent application, as a common function part, a reconfigurable function part, and means forselecting a function, were installed, and as a configuration was composed so as to become a radiocommunication terminal possible to communicate with the use of a radio communication modecorresponding to a selective information, it becomes easy to make the size small and light weight,and it becomes possible to restrain cost for producing in comparison with installing means for acommunication function by means of all radio communication mode possible to utilize at acommunication terminal.Moreover, in order to switch a communication mode, as a selective information supplying to afunctional selection means, is a simple information only to slect a function, it is possible also totransmit with the use of a radio from a base station and it is easy also to storage beforehand at aterminal side. 0Further, as a radio transfer system referring to the present application, if acommon fimctional part, a reconfigurable function part, and a fimction selection means are installedat a radio base station, it becomes to be possible to realize multimode base station to change.10

Claims (11)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A multi-mode radio transmission system for communicating using a plurality of radio communication systems, comprising:

a multi-mode mobile radio communication terminal, including a common modulator and demodulator part, having:

an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector, a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of pieces of differential information, selecting one piece of information from said plurality of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a control station configured to supply differential information, a base station configured to communicate with said multi-mode mobile radio communication terminal and said control station, and wherein, said differential information is supplied from said control station to said base station, and is supplied from said base station to said multi-mode mobile radio communication terminal, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, and said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for the sake of equalization, a number of steps including in a fast Fourier transformation, a number of steps including in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronizing method for synchronizing data, and an equalization method for equalizing data.
2. A multi-mode radio transmission system for communicating using a plurality of radio communication systems, comprising:

a multi-mode mobile radio communication terminal, including a common modulator and demodulator part, having:

an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector, a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of pieces of differential information, selecting one piece of information from said plurality of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a base station configured to communicate with said multi-mode mobile radio communication terminal, wherein, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for the sake of equalization, a number of steps including in a fast Fourier transformation, a number of steps including in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronizing method for synchronizing data, and an equalization method for equalizing data, and said differential information is supplied from said base station using a predefined radio communication system, which uses an error-free modulation and demodulation scheme, including binary phase shift keying scheme.
3. A multi-mode radio transmission system of claim 1, wherein, said multi-mode mobile radio communication terminal further includes a storing part configured to store said plurality of pieces of differential information to be supplied to said function selection means in advance, and an accepting means for accepting an input from a user specifying one of said plurality of pieces of differential information stored in said storing part so as to cause said function selection means to select said one of said plurality of pieces of differential information.
4. A multi-mode radio transmission system of claim 1, wherein, said multi-mode mobile radio communication terminal working as a television receiver, and an outputting part configured to output a signal to a television equipment, said signal being demodulated by using any one of said plurality of radio communication systems, said numerical parameters specify the number of steps in a fast Fourier transformation, the guard time for delayed waves, the synchronizing method for synchronizing data, the number of steps in an inverse fast Fourier transformation, and the equalization method for equalizing data.
5. A multi-mode mobile radio communication terminal for communicating using a plurality of radio communication systems, comprising:

a common modulator and demodulator part, including an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector;

a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of pieces of differential information, selecting one piece of information from said plurality of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a receiving unit for receiving said differential information from a base station, said differential information is supplied from a control station to said base station, and wherein, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, and said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for the sake of equalization, a number of steps including in a fast Fourier transformation, a number of steps including in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronizing method for synchronizing data, and an equalization method for equalizing data.
6. A multi-mode radio communication terminal of claim 5, further comprising:

said multi-mode mobile radio communication terminal further includes a storing part configured to store said plurality of pieces of differential information to be supplied to said function selection means in advance, and an accepting means for accepting an input from a user specifying one of said plurality of pieces of differential information stored in said storing part so as to cause said function selection means to select said one of said plurality of pieces of differential information.
7. A multi-mode radio communication terminal of claim 5, working as a television receiver, and said numerical parameters specify the number of steps in a fast Fourier transformation, the guard time for delayed waves, the synchronizing method for synchronizing data, the number of steps in an inverse fast Fourier transformation, and the equalization method for equalizing data.
8. A multi-mode mobile radio transmission system for communicating using a plurality of radio communication systems, comprising:
a radio base station configured to communicate with a radio communication terminal, said base station including a common modulator and demodulator part, having:
an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector, a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of pieces of differential information, selecting one piece of information from said plurality of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a supplying unit for supplying said differential information with said radio communication terminal using a predefined radio communication system with an error-free modulation and demodulation scheme, including binary phase shift keying scheme, and wherein, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, and said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for the sake of equalization, a number of steps including in a fast Fourier transformation, a number of steps including in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronizing method for synchronizing data, and an equalization method for equalizing data.
9. A multi-mode radio transmission system of claim 8, wherein, said base station communicates with a control station; and said base station is configured to accept an optical signal specifying said differential information sent from said control station via optical fiber, convert said optical signal to an electric signal, and send said electric signal to said mobile terminal using said error-free modulation and demodulation scheme, including binary phase shift keying scheme.
10. A radio base station using a plurality of radio communication systems, comprising:
a common modulator and demodulator part, having:
an orthogonal phase modulator, an automatic gain controller, and a quasi-synchronized orthogonal detector, a reconfigurable modulator and demodulator part having reconfigurable circuits allocated on digital signal processing hardware and configured to realize all components related to modulation and demodulation schemes of said plurality of radio communication systems except components related to said common modulator and demodulator part through numerical parameters, and function selection means being supplied with a plurality of differential information, selecting one piece of information from said plurality of differential information, and providing said one piece of information to said reconfigurable circuits as said numerical parameters, a supplying unit for supplying said differential information with said radio communication terminal using a predefined radio communication system with an error-free modulation and demodulation scheme, including binary phase shift keying scheme, and wherein, said differential information includes addresses of said reconfigurable circuits to be provided said numerical parameters, and said numerical parameters specify at least one of an encoding method for data transmission, a data transmission speed, a frame format for data transmission, a tap coefficient for a filter, a coefficient to determine a shape of a filter, a coefficient to determine a tap coefficient for the sake of equalization, a number of steps including in a fast Fourier transformation, a number of steps including in an inverse fast Fourier transformation, a guard time for delayed waves, a synchronizing method for synchronizing data, and an equalization method for equalizing data.
11. A radio base station of claim 10, wherein, said base station is configured to communicate with a control station; and said base station is configured to accept an optical signal specifying said differential information sent from said control station via optical fiber, convert said optical signal to an electric signal and send said electric signal to said mobile terminal using said error-free modulation and demodulation scheme, including binary phase shift keying scheme.
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DE69940865D1 (en) 2009-06-25
US20020111187A1 (en) 2002-08-15
CA2265114A1 (en) 1999-09-06
EP0941002B1 (en) 2009-05-13
EP0941002A2 (en) 1999-09-08
US6636747B2 (en) 2003-10-21
KR100432379B1 (en) 2004-05-22
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KR19990077650A (en) 1999-10-25
JPH11346383A (en) 1999-12-14

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