CN102281219A - Method and apparatus for adjusting dynamic scope of signal - Google Patents
Method and apparatus for adjusting dynamic scope of signal Download PDFInfo
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- CN102281219A CN102281219A CN2010101994317A CN201010199431A CN102281219A CN 102281219 A CN102281219 A CN 102281219A CN 2010101994317 A CN2010101994317 A CN 2010101994317A CN 201010199431 A CN201010199431 A CN 201010199431A CN 102281219 A CN102281219 A CN 102281219A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/022—Channel estimation of frequency response
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
- H04L27/2659—Coarse or integer frequency offset determination and synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2672—Frequency domain
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Abstract
The present invention discloses a method and apparatus for adjusting the dynamic scope of a signal. The method comprises respectively calculating the module values of channel estimation values of data subcarriers in the signal; calculating the mean value of the module values; determining displacements according to the module values and the mean value; and displacing the subcarriers by using the displacements, thus adjusting the dynamic scope of the signal. According to the invention, the data precision and the system decoding performance are improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and device of adjusting dynamic range of signals.
Background technology
Existing based on Institute of Electrical and Electric Engineers (Institute for Electrical andElectronic Engineers, abbreviate IEEE as) micro-wave access to global intercommunication (the Worldwide Interoperability for Microwave Access of 802.16e standard, abbreviating WiMAX as) wireless communication system is OFDM (Orthogonal FrequencyDivision Multiplexing, abbreviate OFDM as) system, the dynamic range of each sub-carrier power value of transmitting terminal is normally little, but in transmission course, because the channel of each subcarrier place frequency there are differences, make each sub-carrier power value of signal that receives there are differences, in the correlation technique, operate the difference of the performance number existence of dwindling each subcarrier by channel estimation and equalization.In theory, the WiMAX system carries out channel estimation and equalization operation to frequency domain data, adopts frequency domain data to multiply by the conjugation of channel estimation value, divided by the mould of channel estimation value square, i.e. and AxH
*/ (| H|^2), wherein, A is the frequency domain data of the subcarrier that receives, H is a channel estimation value, but when the actual hardware circuit is realized, does not carry out divide operations, but corresponding step after channel estimation balancing such as demodulation operation step are right | H|^2 carries out corresponding compensation, but the channel estimation and equalization of aforesaid way can not reach the effect of dwindling dynamic range of signals.
Fig. 1 is the flow chart that carries out frequency domain equalization according to correlation technique, as shown in Figure 1, comprises the steps:
Step S102, the data on the RRU radio frequency unit reception antenna;
Step S104 carries out fast Fourier transform to frequency domain with the data that RRU receives;
Step S106 carries out above-mentioned frequency domain data the operation of past high displacement;
Step S108, the frequency offset calculation when data after the displacement are carried out;
Step S110 carries out channel estimating and equilibrium, and the employing frequency domain data multiply by the conjugation of channel estimation value, i.e. AxH
*, wherein, A is the frequency domain data of the subcarrier that receives.The frequency domain data of excessive or too small its subcarrier of expression of H is excessive or too small, if H is big, illustrates that the performance number of frequency domain data of the subcarrier that it is corresponding is also big, so AxH
*Power just bigger; Otherwise,, illustrate that the performance number of frequency domain data of the subcarrier that it is corresponding is also little, so AxH if H is little
*Power just littler;
Step S112 carries out equal gain combining with channel estimating and balanced data;
Step S114 carries out the signal demodulation, and compensate for channel is estimated the divide operations do not carry out, with signal divided by | H|^2.
By above-mentioned flow process as can be seen, in actual channel, because channel difference, it is the fading channel difference of each subcarrier process, as step S110, channel estimation value H difference can be bigger, and only channel estimating and balanced after right | H|^2 compensates (compensating among the step S114 after step S110), makes the AxH that each subcarrier is obtained in channel estimating and equilibrium
*Value difference not bigger, in real system, subcarrier is to be kept in the bit of some, cause the subcarrier significant bit of smaller power to be present in the lower bit like this, and the significant bit of more powerful subcarrier leaves in the higher bit, promptly, there is the excessive problem of dynamic range in the sub-carrier power of signal, like this, carry out channel estimating and equalization operation and not only can not dwindle dynamic range of signals, even can enlarge original dynamic range of signals, and this moment data ratio of precision lower.
When carrying out channel estimating and equalization operation in the correlation technique,, cause the ratio of precision of subcarrier data lower, even cause the whole system decoding performance poor owing to exist dynamic range of signals bigger.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and device of adjusting dynamic range of signals, above-mentioned when carrying out channel estimating and equalization operation to solve at least, owing to exist dynamic range of signals bigger, cause the ratio of precision of subcarrier data lower, even cause the poor problem of whole system decoding performance.
To achieve these goals, an aspect according to invention provides a kind of method of adjusting dynamic range of signals.
Method according to adjustment dynamic range of signals of the present invention comprises: the mould value of the channel estimation value of data subcarrier in the difference signal calculated; Calculate the mean value of mould value; Use mould value and mean value to determine the displacement number; Use the displacement number that subcarrier data is carried out displacement, be used for adjusting dynamic range of signals.
Further, use mould value and mean value to determine that the displacement number comprises: the ratio that calculates mould value and mean value; If ratio carries out displacement greater than first threshold value or less than second threshold value with the mould value, determine that the absolute value displacement hour of the difference of mould value after the displacement and mean value is the displacement number.
Further, determine first threshold value and second threshold value according to mean value and mould value.
Further, using the displacement number that subcarrier data is carried out displacement comprises: half of use displacement number carried out the displacement operation first time as displacement to subcarrier data; Carry out channel estimating and equalization operation; Half of use displacement number carried out the displacement operation second time as displacement to subcarrier data.
Further, after half that use the displacement number carried out the displacement operation second time as displacement to subcarrier data, also comprise: the subcarrier data after the displacement is compensated.
Further, distinguish the mould value of calculated data subcarrier channel estimation by the channel estimation value of the pilot sub-carrier in the signal.
To achieve these goals, according to a further aspect in the invention, provide a kind of device of adjusting dynamic range of signals.
Device according to adjustment dynamic range of signals of the present invention comprises: mould value computing module is used for the mould value of the channel estimation value of signal calculated data subcarrier respectively; The mean value calculation module is used to calculate the mean value of mould value; Determination module is used to use mould value and mean value to determine the displacement number; Displacement module is used to use the displacement number that subcarrier data is carried out displacement, is used for adjusting dynamic range of signals.
Further, determination module comprises: ratio computation module is used to calculate the ratio of mould value and mean value; The displacement determination module if be used for ratio greater than first threshold value or less than second threshold value, carries out displacement with the mould value, determines that the absolute value displacement hour of the difference of mould value after the displacement and mean value is the displacement number.
Further, displacement module comprises: first displacement module, and half that is used to use the displacement number carried out displacement operation as displacement; Channel estimating and balance module are used to carry out channel estimating and equalization operation; Second displacement module, half that is used to use the displacement number carried out displacement operation as displacement to subcarrier data.
Further, said apparatus also comprises: compensating module is used for after half that use the displacement number carried out the displacement operation second time as displacement to subcarrier data the subcarrier data after the displacement being compensated.
By the present invention, adopt the mould value of the channel estimation value of data subcarrier in the difference signal calculated; Calculate the mean value of mould value; Use mould value and mean value to determine the displacement number; Use the displacement number that subcarrier data is carried out displacement, be used for adjusting dynamic range of signals, solved when carrying out channel estimating and equalization operation, owing to exist dynamic range of signals bigger, cause the ratio of precision of subcarrier data lower, even cause the poor problem of whole system decoding performance, and then reached the effect that improves data precision and system's decoding performance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart that carries out frequency domain equalization according to correlation technique;
Fig. 2 is the flow chart according to the method for the adjustment dynamic range of signals of the embodiment of the invention;
Fig. 3 is the flow chart that carries out frequency domain equalization according to the preferred embodiment of the invention;
Fig. 4 is the preferred flow charts according to the method for the adjustment dynamic range of signals of the embodiment of the invention;
Fig. 5 is the structured flowchart according to the device of the adjustment dynamic range of signals of the embodiment of the invention; And
Fig. 6 is the preferred construction block diagram according to the device of the adjustment dynamic range of signals of the embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
According to embodiments of the invention, a kind of method of adjusting dynamic range of signals is provided, Fig. 2 is according to the flow chart of the method for the adjustment dynamic range of signals of the embodiment of the invention, as shown in Figure 2, comprising:
Step S202, the mould value of the channel estimation value of data subcarrier in the signal calculated respectively;
Step S204, the mean value of calculating mould value;
Step S206 uses mould value and mean value to determine the displacement number;
Step S208 uses the displacement number that subcarrier data is carried out displacement, is used for adjusting dynamic range of signals.
In the correlation technique, when carrying out channel estimating and equalization operation,, cause the ratio of precision of subcarrier data lower, even cause the whole system decoding performance poor owing to exist dynamic range of signals bigger.In the embodiment of the invention, adopt the mould value of the channel estimation value of data subcarrier in the difference signal calculated; Calculate the mean value of mould value; Use mould value and mean value to determine the displacement number; Use the displacement number that subcarrier data is carried out displacement, be used for adjusting dynamic range of signals, solved when carrying out channel estimating and equalization operation, owing to exist dynamic range of signals bigger, cause the ratio of precision of subcarrier data lower, even cause the poor problem of whole system decoding performance, and then reached the effect that improves data precision and system's decoding performance.
Preferably, step S206 comprises: the ratio that calculates mould value and mean value; If ratio carries out displacement greater than first threshold value or less than second threshold value with the mould value, determine that the absolute value displacement hour of the difference of mould value after the displacement and mean value is the displacement number.
Preferably, determine first threshold value and second threshold value according to mean value and mould value.
Preferably, step S208 comprises: half of use displacement number carried out the displacement operation first time as displacement to subcarrier data; Carry out channel estimating and equalization operation; Half of use displacement number carried out the displacement operation second time as displacement to subcarrier data.By the preferred embodiment, before channel estimating and equalization operation, half carries out displacement with displacement, reduce dynamic range for the first time, after channel estimating and equalization operation, carry out displacement with the residual displacement amount, this two steps operation makes the dynamic range of channel obtain effectively reducing.
Preferably, after half that use the displacement number carried out the displacement operation second time as displacement to subcarrier data, said method also comprised: the subcarrier data after the displacement is compensated.By the preferred embodiment, the subcarrier data after the displacement is compensated, make that the data after the displacement keep original order of magnitude, improved the precision of data processing.
Preferably, distinguish the mould value of calculated data subcarrier channel estimation by the channel estimation value of the pilot sub-carrier in the signal.By the preferred embodiment, the pilot sub-carrier estimated value in the use signal is come the mould value of calculated data subcarrier channel estimation, has reduced operand.
First embodiment
Fig. 3 is the flow chart that carries out frequency domain equalization according to the preferred embodiment of the invention, as shown in Figure 3, comprising:
Step S302, the data on long-distance radio frequency unit (Radio Remote Unit abbreviates RRU as) the radio frequency unit reception antenna;
Step S304 carries out fast Fourier transform to frequency domain with the data that RRU receives;
Step S306 carries out the displacement first time for reducing dynamic range;
Step S308 carries out data after the above-mentioned displacement operation of past high displacement;
Step S310, the frequency offset calculation when data after the displacement are carried out;
Step S312 carries out channel estimating and equilibrium, and the employing frequency domain data multiply by the conjugation of channel estimation value, i.e. AxH
*, wherein, A is the frequency domain data of the subcarrier that receives;
Step S314 carries out the displacement second time for reducing dynamic range;
Step S316 carries out equal gain combining with the data after the displacement;
Step S318 carries out the signal demodulation, and simultaneously compensate for channel is estimated the divide operations and the displacement operation that do not carry out, actual compensation be | H|^2 and AxH
*The number of integral shift.
Present embodiment carrying out before channel estimating and the equilibrium first time displacement and channel estimating and balanced after carry out displacement second time, and right after being shifted for the second time | H|^2 and AxH
*The number of integral shift compensates, and has reduced the dynamic range of signal, has improved data precision.
Second embodiment
The present invention also provides a preferred embodiment, combines the technical scheme of above-mentioned a plurality of preferred embodiments, and Fig. 4 is according to the preferred flow charts of the method for the adjustment dynamic range of signals of the embodiment of the invention, describes in detail below in conjunction with Fig. 4.
Step S402 obtains the channel estimation value of data subcarrier according to pilot sub-carrier;
Step S404 asks the mould of the value after each data subcarrier equilibrium, promptly | and AxH
*|;
Step S406 asks the mean value of value mould after all data subcarrier equilibriums;
Step S408 for each data subcarrier, calculates its AxH
*The ratio of mould value and mean value, if greater than predetermined value a or less than predetermined value b, with its AxH
*The mould value be displaced to its value near mean value, write down carry digit scale simultaneously, wherein, calculate a and b according to mean value and mould value.
Step S410 for all data subcarriers, carries out the displacement first time according to its scale value to it, and carry digit is scale/2;
Need to prove that step S402 is that step S306 carries out the detailed step of displacement for the first time in order to reduce dynamic range among Fig. 3 to step S410.
Step S412 for channel estimating and balanced data subcarrier, carries out the displacement second time according to its scale value to it.
Need to prove that if scale is an even number, the twice displacement number average in front and back is scale/2, if scale is an odd number, then the number of displacement for the first time is scale/2, and the number of displacement for the second time is (scale+1)/2.Step S412 carries out the displacement second time corresponding to the step S314 among Fig. 3 in order to reduce dynamic range.
Step S414, when the division that compensate for channel is estimated not do when balanced, actual compensation be (| H|^2) * scale.
Need to prove that step S414 carries out the signal demodulation corresponding to the step S318 among Fig. 3, simultaneously compensate for channel is estimated the divide operations and the displacement operation that do not carry out, actual compensation be | H|^2 and AxH
*The number of integral shift.
By the embodiment of the invention, carrying out with scale/2 before channel estimating and equilibrium is that displacement carries out the displacement first time and carry out the displacement second time with (scale+1)/2 after channel estimating and equilibrium, and right | H|^2 and AxH
*The number of integral shift compensates, and has reduced the dynamic range of signal, has improved data precision.
Need to prove, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
According to embodiments of the invention, a kind of device of adjusting the dynamics of channels scope is provided, Fig. 5 is the structured flowchart according to the device of the adjustment dynamic range of signals of the embodiment of the invention, as shown in Figure 5, this device comprises: mould value computing module 52, mean value calculation module 54, determination module 56 and displacement module 58 are described in detail said structure below:
Mould value computing module 52 is used for the mould value of the channel estimation value of signal calculated data subcarrier respectively; Mean value calculation module 54 is connected to mould value computing module 52, is used to calculate the mean value of the mould value that mould value computing module 52 calculates; Determination module 56 is connected to mould value computing module 52 and mean value calculation module 54, and the mean value that is used to use mould value that mould value computing module 52 calculates and mean value calculation module 54 to calculate is determined the displacement number; Displacement module 58 is connected to determination module 56, and the displacement number that is used to use determination module 56 to determine carries out displacement to subcarrier data, is used for adjusting dynamic range of signals.
In the correlation technique, when carrying out channel estimating and equalization operation,, cause the ratio of precision of subcarrier data lower, even cause the whole system decoding performance poor owing to exist dynamic range of signals bigger.In the embodiment of the invention, adopt the mould value of the channel estimation value of data subcarrier in the signal calculated respectively and calculate the mean value of mould value; Use mould value and mean value to determine that the displacement number carries out displacement, be used for adjusting dynamic range of signals, solved when carrying out channel estimating and equalization operation, owing to exist dynamic range of signals bigger, cause the ratio of precision of subcarrier data lower, even cause the poor problem of whole system decoding performance, and then reached the effect that improves data precision and system's decoding performance.
Fig. 6 is the preferred construction block diagram according to the device of the adjustment dynamic range of signals of the embodiment of the invention, as shown in Figure 6, determination module 56 comprises: ratio computation module 562 and displacement determination module 564, displacement module 58 comprises: first displacement module 582, channel estimating and balance module 584 and second displacement module 586, said apparatus also comprises compensating module 62, below said structure is described in detail:
Determination module 56 comprises: ratio computation module 562, be connected to mould value computing module 52 and mean value calculation module 54, and be used to calculate the ratio of the mean value that mould value that mould value computing module 52 calculates and mean value calculation module 54 calculate; Displacement determination module 564, be connected to ratio computation module 562, if be used for ratio that computing module 562 calculates greater than first threshold value or less than second threshold value, the mould value is carried out displacement, determine that the absolute value displacement hour of the difference of mould value after the displacement and mean value is the displacement number.
Displacement module 58 comprises: first displacement module 582, be connected to displacement determination module 564, and half that is used to use displacement number that displacement determination module 564 determines carried out the displacement operation second time as displacement to subcarrier data; Channel estimating and balance module 584 are connected to first displacement module 582, are used for the data after 582 displacements of first displacement module are carried out channel estimating and equalization operation; Second displacement module 586 is connected to displacement determination module 564, and half that is used to use displacement number that displacement determination module 564 determines carried out the displacement operation second time as displacement to subcarrier data.
Said apparatus also comprises: compensating module 62, be connected to second displacement module 586, and be used for second displacement module 586 half with the displacement number compensated the subcarrier data that subcarrier data carries out behind the displacement operation as displacement.
By the preferred embodiment, before channel estimating and equalization operation, half carries out displacement with displacement, reduce dynamic range for the first time, after channel estimating and equalization operation, carry out displacement with the residual displacement amount, this two steps operation makes the dynamic range of channel obtain effectively reducing.
Need to prove that the device of the adjustment dynamic range of signals of describing among the device embodiment is corresponding to above-mentioned method embodiment, its concrete implementation procedure had been carried out detailed description in method embodiment, do not repeat them here.
In sum, by the present invention, solved when carrying out channel estimating and equalization operation, owing to exist dynamic range of signals bigger, cause the ratio of precision of subcarrier data lower, even cause the poor problem of whole system decoding performance, and improve the performance of data precision and system's decoding.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of adjusting dynamic range of signals is characterized in that, comprising:
The mould value of the channel estimation value of data subcarrier in the difference signal calculated;
Calculate the mean value of described mould value;
Use described mould value and described mean value to determine the displacement number;
Use described displacement number that described subcarrier data is carried out displacement, be used for adjusting described dynamic range of signals.
2. method according to claim 1 is characterized in that, uses described mould value and described mean value to determine that the displacement number comprises:
Calculate the ratio of described mould value and described mean value;
If described ratio greater than first threshold value or less than second threshold value, carries out displacement with described mould value, determine that the absolute value displacement hour of the difference of described mould value after the described displacement and described mean value is described displacement number.
3. method according to claim 2 is characterized in that, determines described first threshold value and described second threshold value according to described mean value and described mould value.
4. method according to claim 1 is characterized in that, uses described displacement number that described subcarrier data is carried out displacement and comprises:
Half that use described displacement number carried out the described displacement operation first time as displacement to described subcarrier data;
Carry out channel estimating and equalization operation;
Half that use described displacement number carried out the described displacement operation second time as displacement to described subcarrier data.
5. method according to claim 4 is characterized in that, after half that use described displacement number carried out the described displacement operation second time as displacement to described subcarrier data, also comprises: the described subcarrier data after the described displacement is compensated.
6. method according to claim 1 is characterized in that, calculates the mould value of the channel estimation value of described data subcarrier respectively by the channel estimation value of the pilot sub-carrier in the described signal.
7. a device of adjusting dynamic range of signals is characterized in that, comprising:
Mould value computing module is used for the mould value of the channel estimation value of signal calculated data subcarrier respectively;
The mean value calculation module is used to calculate the mean value of described mould value;
Determination module is used to use described mould value and described mean value to determine the displacement number;
Displacement module is used to use described displacement number that described subcarrier data is carried out displacement, is used for adjusting described dynamic range of signals.
8. device according to claim 7 is characterized in that, described determination module comprises:
Ratio computation module is used to calculate the ratio of described mould value and described mean value;
The displacement determination module if be used for described ratio greater than first threshold value or less than second threshold value, carries out displacement with described mould value, determines that the absolute value displacement hour of the difference of described mould value after the described displacement and described mean value is described displacement number.
9. device according to claim 7 is characterized in that, described displacement module comprises:
First displacement module, half that is used to use described displacement number carried out described displacement operation as displacement;
Channel estimating and balance module are used to carry out channel estimating and equalization operation;
Second displacement module, half that is used to use described displacement number carried out described displacement operation as displacement to described subcarrier data.
10. device according to claim 9, it is characterized in that, also comprise: compensating module is used for after half that use described displacement number carried out the described displacement operation second time as displacement to described subcarrier data the described subcarrier data after the described displacement being compensated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010199431.7A CN102281219B (en) | 2010-06-09 | 2010-06-09 | Method and apparatus for adjusting dynamic scope of signal |
| PCT/CN2010/077547 WO2011153760A1 (en) | 2010-06-09 | 2010-09-30 | Method and device for adjusting dynamic range of signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010199431.7A CN102281219B (en) | 2010-06-09 | 2010-06-09 | Method and apparatus for adjusting dynamic scope of signal |
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| CN102281219B CN102281219B (en) | 2015-07-22 |
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| US6021110A (en) * | 1996-08-12 | 2000-02-01 | Telecommunications Research Laboratories | OFDM timing and frequency recovery system |
| US20040004934A1 (en) * | 2002-07-03 | 2004-01-08 | Oki Techno Centre (Singapore) Pte Ltd | Receiver and method for WLAN burst type signals |
| CN1705301A (en) * | 2004-06-01 | 2005-12-07 | 北京大学 | Channel equalization method of OFDM system |
| CN1809040A (en) * | 2006-01-26 | 2006-07-26 | 东南大学 | Programmable device based estimation and balancing apparatus and method for OFDM channels |
| WO2009038543A1 (en) * | 2007-09-19 | 2009-03-26 | Agency For Science, Technology And Research | A method of transmitting data to a receiver |
| CN101536333A (en) * | 2006-09-29 | 2009-09-16 | 联发科技股份有限公司 | Pre-scaling of initial channel estimates in joint detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333532C (en) * | 2004-04-02 | 2007-08-22 | 清华大学 | Quadrature frequency division complex digita receiver |
| CN101039291A (en) * | 2006-03-16 | 2007-09-19 | 中国科学院上海微系统与信息技术研究所 | Method and apparatus for correcting residual carrier frequency deviation, fixed phase and amplitude deviation |
| CN101132388B (en) * | 2007-09-18 | 2013-01-09 | 沖电气（新加坡）技术中心 | Receiving method and device for receiving coded signal assisted by signal channel condition information |
-
2010
- 2010-06-09 CN CN201010199431.7A patent/CN102281219B/en not_active Expired - Fee Related
- 2010-09-30 WO PCT/CN2010/077547 patent/WO2011153760A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6021110A (en) * | 1996-08-12 | 2000-02-01 | Telecommunications Research Laboratories | OFDM timing and frequency recovery system |
| US20040004934A1 (en) * | 2002-07-03 | 2004-01-08 | Oki Techno Centre (Singapore) Pte Ltd | Receiver and method for WLAN burst type signals |
| CN1705301A (en) * | 2004-06-01 | 2005-12-07 | 北京大学 | Channel equalization method of OFDM system |
| CN1809040A (en) * | 2006-01-26 | 2006-07-26 | 东南大学 | Programmable device based estimation and balancing apparatus and method for OFDM channels |
| CN101536333A (en) * | 2006-09-29 | 2009-09-16 | 联发科技股份有限公司 | Pre-scaling of initial channel estimates in joint detection |
| WO2009038543A1 (en) * | 2007-09-19 | 2009-03-26 | Agency For Science, Technology And Research | A method of transmitting data to a receiver |
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| Publication number | Publication date |
|---|---|
| WO2011153760A1 (en) | 2011-12-15 |
| CN102281219B (en) | 2015-07-22 |
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