WO1995005709A1 - Improved ir/rf radio transceiver - Google Patents

Improved ir/rf radio transceiver Download PDF

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Publication number
WO1995005709A1
WO1995005709A1 PCT/US1994/009180 US9409180W WO9505709A1 WO 1995005709 A1 WO1995005709 A1 WO 1995005709A1 US 9409180 W US9409180 W US 9409180W WO 9505709 A1 WO9505709 A1 WO 9505709A1
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WO
WIPO (PCT)
Prior art keywords
signal
frequency
receiver
infra
red
Prior art date
Application number
PCT/US1994/009180
Other languages
French (fr)
Inventor
Robert J. Zavrel
Original Assignee
Gec Plessey Semiconductors, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gec Plessey Semiconductors, Inc. filed Critical Gec Plessey Semiconductors, Inc.
Publication of WO1995005709A1 publication Critical patent/WO1995005709A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114Indoor or close-range type systems
    • H04B10/1143Bidirectional transmission
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40Transceivers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field

Definitions

  • the invention relates to radio electronics, particularly to improved radio transceivers combining infra ⁇ red (IR) and radio-frequency (RF) communication and signal detection techniques .
  • the invention resides in coupling an infra-red (IR) communication subsystem to a radio-frequency (RF) transceiver.
  • the IR subsystem includes an IR transmitter and receiver which may be coupled selectably by a switch to a data signal channel or source in the transceiver.
  • the IR receiver includes an inductor and a diode coupled in parallel, such that the IR receiver detects an IR signal, in significant part, by resonating such signal substantially at a detection frequency.
  • FIG. 1 is a generalized block diagram of an improved radio-frequency (RF) communication system having infra-red (IR) transmitter 24 and receiver 26.
  • RF radio-frequency
  • FIG. 2 is a block diagram of a prior-art digital radio transceiver, namely transceiver model DE6003 available from GEC Plessey Semiconductors.
  • FIG. 3 is a block diagram of the digital radio transceiver shown in FIG. 2, but modified for IR/RF signal communication according to the present invention.
  • FIG. 4 is a block diagram of alternate IR detector 103.
  • FIG. 5 is a simplified frequency response chart of sensed signal 70 according to the present invention.
  • FIG. 6 is a simplified frequency response chart of output signal 80 according to the present invention.
  • FIG. 1 shows a generalized block diagram of an improved radio-frequency (RF) communication system 10 having infra-red (IR) transmitter 24 and receiver 26 coupled thereto.
  • System 10 may be a conventional digital radio transceiver, such as the DE6003 Digital Radio Transceiver available commercially from GEC Plessey Semiconductors located in Scotts Valley, California.
  • FIG. 2 is a generalized block diagram of the prior-art DE6003 transceiver, showing conventional components, as configured presently, prior to modification according to the present invention.
  • system 10 contains transceiver circuitry 12, 14 for digital signal communication over allocated RF bands.
  • Data controller 16 serves as a data signal source or receptor for sending or receiving signals to RF transmitter 12 or from RF receiver 14 respectively, in accordance with normal radio operation of system 10.
  • IR transceiver 24 and receiver 26 may be coupled user-selectably by switches 20, 22 or connecting circuit 18 to data controller 16 for signal communication therebetween.
  • switch 22 may couple data controller 16 to IR receiver 26, instead of RF receiver 14, to enable data signal reception over IR spectrum, instead of RF spectrum (or vice versa) .
  • switch 20 may couple data controller 16 to IR transmitter 24, instead of RF transmitter 12, to enable data signal reception over IR spectrum, instead of RF spectrum (or vice versa) .
  • the DE6003 transceiver is modified functionally for coupling to IR transmitter 121, including photo-emitting diode 120 and buffer 122, or IR receiver or photo-sensitive diode 102, thereby providing combined RF and IR signal communication.
  • DE6003 is re ⁇ configured to include IR receiver 102 and IR transmitter 121, which may be coupled to DE6003 transceiver through switch 134 and switch 124 respectively.
  • switch 134 is switched to transmit mode (TX) , but may be switched to receive mode (RX) to couple IR receiver 102 to the DE6003 transceiver.
  • TX transmit mode
  • RX receive mode
  • IR receiver 102 functions to receive IR signals for the DE6003 transceiver.
  • IR transmitter 121 functions to transmit IR signals for the DE6003 transceiver.
  • the conventional components of the DE6003 transceiver may be re-configured to include switches 130, 124, as shown in FIG. 3.
  • switches 124, 130 may each be switched from RF transmit or receive mode, as shown, to IR transmit or receive mode. In this way, for example, during IR transmit or receive mode, switches 124, 130 are switched from the shown configuration to couple conventional components of the DE6003, thereby enabling RF transmit or receive mode.
  • IR detector 102 includes inductor circuit 114 and infra-red radiation detecting photo-diode 110, of a square-law type infra-red detector, and coupled thereto in parallel.
  • IR receiver 102 may detect an incoming, modulated IR signal, in significant part, by resonating such signal substantially at an RF baseband or carrier frequency or signal.
  • IR detector 102 couples the resonant structure 110, 114 to power 112 and ground 116, and provides detection signal 118 through capacitor 108 and buffer 106.
  • the received infra-red signal which is modulated at the RF baseband, is amplitude-shift keyed (ASK) , and frequency- shift keyed (FSK) by specified data.
  • ASK amplitude-shift keyed
  • FSK frequency- shift keyed
  • the frequency of the RF baseband is amplified by the resonating effect of inductive circuit 114 coupled to detecting diode 110 and its inherent capacitance, and detector 102 is thereby more sensitive to data frequency-shift keyed
  • IR receiver or detector 103 including inductor 114, IR signal photo-sensitive diode 110, capacitor 141, variable resistor 142, and transistor 140, coupled to power 112 and ground 116, to provide IR detection or sensed signal 118.
  • IR receiver 103 also functions generally as a so-called Colpitts oscillator.
  • IR detector 103 provides components 140, 141, 142 to inhibit conduction of direct current, and inhibit loading of the resonating effect. Additionally, such components 140, 141, 142 provide for increased amplification in output signal 118, beyond that which may be provided by the resonating effect of infra-red radiation-detecting diode 110 and inductor 114.
  • the incoming, received infra-red signal contains a carrier signal that is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by modulating data information.
  • ASK amplitude-shift keyed
  • FSK frequency-shift keyed
  • the resonating effect occurs at the frequency of the carrier signal, such that output signal 118 is amplified substantially at this frequency.
  • a remote transmitter when operating, emits an infra-red signal that is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by data information.
  • the infra-red radiation-detecting diode 114 of the invention senses this incoming signal, possibly including present infra-red "noise. " Because of such noise, it may be be difficult conventionally to distinguish the carrier signal from the noise.
  • the resonating effect at the frequency of the carrier signal facilitates IR signal detection, particularly by increasing effectively the detected amplitude of the carrier signal relative to the amplitude of the background noise.
  • the frequency of the carrier signal within the infrared spectrum is "atypical" (i.e., a frequency at which levels of noise that are sufficiently high to prevent conventional IR signal detection are not usually present . )
  • the atypical frequency may correspond to frequencies used in RF-based wide and local area networks, such that switching between RF and IR is easily accomplished.
  • the preferred RF baseband frequency is 38 MHz.
  • the data information which is frequency- shift keyed (FSK) about the carrier signal includes frequencies w ⁇ _ and W2 which may be provided in binary form, such that such frequencies correspond to logical high or low (1/0) signals.
  • a remote transmitter when operating, emits an infra-red signal at 38 MHz, which is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by data information including a series of frequencies W]_ and W2 •
  • Infra-red radiation-detecting diode 110 senses the incoming signal, along with infra-red noise.
  • the resonating effect of inductor 114 together with the effective capacitance of diode 110 resonates the incoming, sensed signal at 38 MHz, which is the frequency of the carrier signal.
  • the amplified sensed signal may then be further amplified and buffered.

Abstract

A digital, radio-frequency (RF) transceiver is modified by coupling an infrared (IR) communication subsystem thereto. The subsystem includes an IR transmitter and receiver which may be coupled selectably by a switch to a data signal channel or source in the transceiver. Preferably, the IR receiver includes an inductor and a diode coupled in parallel, such that the IR receiver detects an IR signal, in significant part, by resonating such signal substantially at a detection or RF baseband frequency.

Description

IMPROVED IR/RF RADIO TRANSCEIVER
BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to radio electronics, particularly to improved radio transceivers combining infra¬ red (IR) and radio-frequency (RF) communication and signal detection techniques .
2. Description of the Background Art
In conventional radio systems, data signals are modulated for communication by transceivers over allocated RF signal bands. Conventional radio systems, however, do not easily provide signal transmission or reception over IR frequencies. It would be desirable, therefore, to provide an improved radio system, and particularly, related signal - detection subsystems, whereby both RF and IR signals may be communicated.
SUMMARY OF THE INVENTION
The invention resides in coupling an infra-red (IR) communication subsystem to a radio-frequency (RF) transceiver. The IR subsystem includes an IR transmitter and receiver which may be coupled selectably by a switch to a data signal channel or source in the transceiver. Preferably, the IR receiver includes an inductor and a diode coupled in parallel, such that the IR receiver detects an IR signal, in significant part, by resonating such signal substantially at a detection frequency.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a generalized block diagram of an improved radio-frequency (RF) communication system having infra-red (IR) transmitter 24 and receiver 26.
i FIG. 2 is a block diagram of a prior-art digital radio transceiver, namely transceiver model DE6003 available from GEC Plessey Semiconductors.
FIG. 3 is a block diagram of the digital radio transceiver shown in FIG. 2, but modified for IR/RF signal communication according to the present invention.
FIG. 4 is a block diagram of alternate IR detector 103.
FIG. 5 is a simplified frequency response chart of sensed signal 70 according to the present invention.
FIG. 6 is a simplified frequency response chart of output signal 80 according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a generalized block diagram of an improved radio-frequency (RF) communication system 10 having infra-red (IR) transmitter 24 and receiver 26 coupled thereto. System 10 may be a conventional digital radio transceiver, such as the DE6003 Digital Radio Transceiver available commercially from GEC Plessey Semiconductors located in Scotts Valley, California. FIG. 2 is a generalized block diagram of the prior-art DE6003 transceiver, showing conventional components, as configured presently, prior to modification according to the present invention.
As shown in FIG. 1, system 10 contains transceiver circuitry 12, 14 for digital signal communication over allocated RF bands. Data controller 16 serves as a data signal source or receptor for sending or receiving signals to RF transmitter 12 or from RF receiver 14 respectively, in accordance with normal radio operation of system 10.
In accordance with the present invention, IR transceiver 24 and receiver 26 may be coupled user-selectably by switches 20, 22 or connecting circuit 18 to data controller 16 for signal communication therebetween. Thus, during radio operation, switch 22 may couple data controller 16 to IR receiver 26, instead of RF receiver 14, to enable data signal reception over IR spectrum, instead of RF spectrum (or vice versa) . Similarly, switch 20 may couple data controller 16 to IR transmitter 24, instead of RF transmitter 12, to enable data signal reception over IR spectrum, instead of RF spectrum (or vice versa) .
In FIG. 3, the DE6003 transceiver is modified functionally for coupling to IR transmitter 121, including photo-emitting diode 120 and buffer 122, or IR receiver or photo-sensitive diode 102, thereby providing combined RF and IR signal communication. In particular, DE6003 is re¬ configured to include IR receiver 102 and IR transmitter 121, which may be coupled to DE6003 transceiver through switch 134 and switch 124 respectively.
As shown in FIG. 3, switch 134 is switched to transmit mode (TX) , but may be switched to receive mode (RX) to couple IR receiver 102 to the DE6003 transceiver. Thus, during RX mode, IR receiver 102 functions to receive IR signals for the DE6003 transceiver. Additionally, during TX mode, IR transmitter 121 functions to transmit IR signals for the DE6003 transceiver.
Furthermore, to enable changing radio -operation between IR and RF transmit or receive modes, the conventional components of the DE6003 transceiver may be re-configured to include switches 130, 124, as shown in FIG. 3. In particular, switches 124, 130 may each be switched from RF transmit or receive mode, as shown, to IR transmit or receive mode. In this way, for example, during IR transmit or receive mode, switches 124, 130 are switched from the shown configuration to couple conventional components of the DE6003, thereby enabling RF transmit or receive mode.
Preferably, IR detector 102 includes inductor circuit 114 and infra-red radiation detecting photo-diode 110, of a square-law type infra-red detector, and coupled thereto in parallel. In this way, IR receiver 102 may detect an incoming, modulated IR signal, in significant part, by resonating such signal substantially at an RF baseband or carrier frequency or signal. IR detector 102 couples the resonant structure 110, 114 to power 112 and ground 116, and provides detection signal 118 through capacitor 108 and buffer 106. The received infra-red signal, which is modulated at the RF baseband, is amplitude-shift keyed (ASK) , and frequency- shift keyed (FSK) by specified data.
Thus, the frequency of the RF baseband is amplified by the resonating effect of inductive circuit 114 coupled to detecting diode 110 and its inherent capacitance, and detector 102 is thereby more sensitive to data frequency-shift keyed
(FSK) about the carrier signal. The increased sensitivity is illustrated in FIGs. 5 an 6,. where sensed signal 70 is compared to increased-voltage output signal' 80 which is resonated and amplified at a particular RF baseband frequency, fc, over the infra-red spectrum at which resonance occurs.
In FIG. 4, an alternate IR receiver or detector 103 is shown, including inductor 114, IR signal photo-sensitive diode 110, capacitor 141, variable resistor 142, and transistor 140, coupled to power 112 and ground 116, to provide IR detection or sensed signal 118. In this way, IR receiver 103 also functions generally as a so-called Colpitts oscillator.
Similarly to the functions of capacitor 108 and buffer 106 in IR detector 102, IR detector 103 provides components 140, 141, 142 to inhibit conduction of direct current, and inhibit loading of the resonating effect. Additionally, such components 140, 141, 142 provide for increased amplification in output signal 118, beyond that which may be provided by the resonating effect of infra-red radiation-detecting diode 110 and inductor 114.
Preferably, the incoming, received infra-red signal contains a carrier signal that is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by modulating data information. The resonating effect occurs at the frequency of the carrier signal, such that output signal 118 is amplified substantially at this frequency.
Thus, when operating, a remote transmitter (not shown) emits an infra-red signal that is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by data information. The infra-red radiation-detecting diode 114 of the invention, then senses this incoming signal, possibly including present infra-red "noise. " Because of such noise, it may be be difficult conventionally to distinguish the carrier signal from the noise. In accordance with the present invention, however, the resonating effect at the frequency of the carrier signal facilitates IR signal detection, particularly by increasing effectively the detected amplitude of the carrier signal relative to the amplitude of the background noise.
Preferably, the frequency of the carrier signal within the infrared spectrum is "atypical" (i.e., a frequency at which levels of noise that are sufficiently high to prevent conventional IR signal detection are not usually present . ) The atypical frequency may correspond to frequencies used in RF-based wide and local area networks, such that switching between RF and IR is easily accomplished. In- the present embodiment, the preferred RF baseband frequency is 38 MHz.
Additionally, the data information which is frequency- shift keyed (FSK) about the carrier signal includes frequencies w^_ and W2 which may be provided in binary form, such that such frequencies correspond to logical high or low (1/0) signals.
Thus, when operating, a remote transmitter emits an infra-red signal at 38 MHz, which is amplitude-shift keyed (ASK) and that is frequency-shift keyed (FSK) by data information including a series of frequencies W]_ and W2 • Infra-red radiation-detecting diode 110 senses the incoming signal, along with infra-red noise. The resonating effect of inductor 114 together with the effective capacitance of diode 110 resonates the incoming, sensed signal at 38 MHz, which is the frequency of the carrier signal. The amplified sensed signal may then be further amplified and buffered.

Claims

CLAIMS I claim:
1. A communication system comprising: infra-red (IR) communication means; radio frequency (RF) communication means; a signal controller; and a switch for selectably coupling the signal controller to the IR communication means or the RF communication means.
2. The system of Claim 1 wherein: the IR communication means comprises an IR transmitter and an IR receiver.
3. The system of Claim 2 wherein: the IR receiver comprises an inductor and a diode coupled in parallel, such that the IR receiver detects an IR signal by resonating such signal substantially at a detection frequency.
4. The system of Claim 1 wherein: the RF communication means comprises an RF transmitter and an IR receiver.
5. A radio communication apparatus comprising: an infra-red (IR) receiver; a radio frequency (RF) receiver; a signal controller; and a switch for selectably coupling the signal controller to the IR receiver or the RF receiver, wherein the IR receiver comprises an inductor and a diode coupled in parallel, the IR receiver detecting an IR signal by resonating such signal substantially at a detection frequency.
6. A signal detection system comprising: a detector for receiving an infra-red signal having an RF baseband signal that is amplitude-shift keyed (ASK) and frequency-shift keyed (FSK) by information, for producing a sensed signal indicative of received infra-red radiation and having an amplitude representative of the intensity of the received infrared radiation; and a resonator coupled to the detector for resonating therewith substantially at a frequency of the RF baseband signal, thereby amplifying a magnitude of the sensed signal at the frequency of the RF baseband signal .
7. The signal detection system of Claim 6 wherein: the resonator is connected in parallel with the detector.
8. The signal detection system of Claim 6 wherein: the detector comprises a diode; the resonator comprises an inductor and a capacitor coupled to the diode to inhibit conduction of direct current relative to the detector means and resonator means; and a buffer coupled to the detector and resonator through the capacitor, for amplifying received signal to produce an output signal therefrom representative of the modulating information.
9. The signal detection system of Claim 6 wherein: the detector comprises a photo-responsive diode; and the resonator comprises an inductor and an amplifier coupled to the detector and resonator, for increasing the magnitude of received RF baseband signal to produce an output signal therefrom representative of the modulating information, without loading the resonance of the resonator.
10. The signal detection system of Claim 6 wherein: the carrier frequency comprises an atypical frequency within the infra-red spectrum.
11. A method for detecting modulating information on an infra-red carrier signal, comprising the steps of: generating a sensed signal in response to detecting information that frequency-shift keys (FSK) infra-red radiation about an RF baseband signal that is amplitude-shift keyed (ASK) to provide the sensed signal having an amplitude indicative of the intensity of the received infra-red radiation; and resonating the sensed signal about the RF baseband frequency to provide an amplified output RF baseband signal including the modulating information within a selected waveband.
12. The method of Claim 11 wherein: the carrier frequency comprises an atypical frequency within the infra-red spectrum.
PCT/US1994/009180 1993-08-13 1994-08-11 Improved ir/rf radio transceiver WO1995005709A1 (en)

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US08/106,278 US5585953A (en) 1993-08-13 1993-08-13 IR/RF radio transceiver and method
US08/106,278 1993-08-13

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2360655A (en) * 1999-11-16 2001-09-26 Motorola Inc Wireless communication device having co-ordinated primary and secondary transmitters
CN1076909C (en) * 1995-06-14 2001-12-26 日本电气株式会社 Infrared space communication system capable of reducing process quantities of data communication device during communication
EP1933288A2 (en) 2006-12-15 2008-06-18 SMK Corporation RF communication module and RF module communication system
EP2256926A1 (en) * 2009-05-29 2010-12-01 LG Electronics Inc. Multi-mode pointing device and method for operating a multi-mode pointing device
US8126030B2 (en) 2005-08-31 2012-02-28 Motorola Mobility, Inc. Multi-mode wireless communication device and method
US8704958B2 (en) 2009-06-01 2014-04-22 Lg Electronics Inc. Image display device and operation method thereof

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5715077A (en) * 1994-09-19 1998-02-03 Vlsi Technology, Inc. Multi-mode infrared input/output interface
US5790949A (en) * 1996-07-01 1998-08-04 Sun Microsystems, Inc. Paging device with ability to automatically connect by telephone a person initiating a page request to the person paged
WO1998034208A1 (en) * 1997-01-31 1998-08-06 Thomson Consumer Electronics, Inc. Communications system for remote control systems
US5999294A (en) * 1997-03-13 1999-12-07 Aironet Wireless Communications, Inc. Detachable antenna with optical port
US5946120A (en) * 1997-05-30 1999-08-31 Lucent Technologies Inc. Wireless communication system with a hybrid optical and radio frequency signal
US6396612B1 (en) * 1998-02-11 2002-05-28 Telefonaktiebolaget L M Ericsson System, method and apparatus for secure transmission of confidential information
US6901241B2 (en) * 1998-02-11 2005-05-31 Telefonaktiebolaget L M Ericsson (Publ) System, method and apparatus for secure transmission of confidential information
JPH11298412A (en) * 1998-04-07 1999-10-29 Minolta Co Ltd Optical transmission system of device
US6868237B2 (en) 1998-04-24 2005-03-15 Lightpointe Communications, Inc. Terrestrial optical communication network of integrated fiber and free-space links which requires no electro-optical conversion between links
US6239888B1 (en) 1998-04-24 2001-05-29 Lightpointe Communications, Inc. Terrestrial optical communication network of integrated fiber and free-space links which requires no electro-optical conversion between links
US6281999B1 (en) 1998-07-09 2001-08-28 Zilog, Inc. Optics system for infrared signal transceivers
US7181144B1 (en) 1998-07-09 2007-02-20 Zilog, Inc. Circuit design and optics system for infrared signal transceivers
EP1072110A1 (en) * 1998-08-03 2001-01-31 Calibre, Inc. Device and system for integrating and processing infrared (ir) and radio frequency (rf) signals
US6211790B1 (en) 1999-05-19 2001-04-03 Elpas North America, Inc. Infant and parent matching and security system and method of matching infant and parent
US6490443B1 (en) 1999-09-02 2002-12-03 Automated Business Companies Communication and proximity authorization systems
US6763195B1 (en) 2000-01-13 2004-07-13 Lightpointe Communications, Inc. Hybrid wireless optical and radio frequency communication link
DE10021188A1 (en) * 2000-05-03 2002-01-31 Trenta Technologie Ct Gmbh Binary remote switching system of illumination device, has toggle switch of remote switch, for selectively switching between infrared and radio transmitters
US7098850B2 (en) * 2000-07-18 2006-08-29 King Patrick F Grounded antenna for a wireless communication device and method
US6483473B1 (en) 2000-07-18 2002-11-19 Marconi Communications Inc. Wireless communication device and method
US6806842B2 (en) * 2000-07-18 2004-10-19 Marconi Intellectual Property (Us) Inc. Wireless communication device and method for discs
US6646555B1 (en) 2000-07-18 2003-11-11 Marconi Communications Inc. Wireless communication device attachment and detachment device and method
US7716082B1 (en) 2000-08-24 2010-05-11 Gilbarco, Inc. Wireless payment mat device and method for retail environments
WO2002019573A2 (en) * 2000-08-31 2002-03-07 Aerocomm, Inc. System and method for transmitting information modulated radio frequency signals using infrared transmission
US6975834B1 (en) 2000-10-03 2005-12-13 Mineral Lassen Llc Multi-band wireless communication device and method
US20020122230A1 (en) * 2001-03-05 2002-09-05 Hossein Izadpanah Hybrid RF and optical wireless communication link and network structure incorporating it therein
AU2002255685A1 (en) * 2001-03-09 2002-09-24 Lightpointe Communications, Inc. Free space optical communication network
WO2002073834A1 (en) * 2001-03-09 2002-09-19 Lightpointe Communications, Inc. Multi-tenant unit optical network
US6889009B2 (en) * 2001-04-16 2005-05-03 Lightpointe Communications, Inc. Integrated environmental control and management system for free-space optical communication systems
US6895252B2 (en) * 2001-05-10 2005-05-17 Thomson Licensing Sa Economical extension of the operating distance of an RF remote link accommodating information signals having differing carrier frequencies
WO2003001626A2 (en) * 2001-06-22 2003-01-03 Massachusetts Institute Technology Monolithic integration of micro-optics circuits and rf circuits
US6983376B2 (en) 2001-10-16 2006-01-03 Qualcomm Incorporated Method and apparatus for providing privacy of user identity and characteristics in a communication system
AU2003233033A1 (en) 2002-04-24 2003-11-10 Marconi Intellectual Property (Us) Inc Manufacturing method for a wireless communication device and manufacturing apparatus
AU2003231093A1 (en) * 2002-04-25 2003-11-10 Roqiya Networks, Inc. A method and system for free-space communication
US6847912B2 (en) * 2002-05-07 2005-01-25 Marconi Intellectual Property (Us) Inc. RFID temperature device and method
US7224273B2 (en) * 2002-05-23 2007-05-29 Forster Ian J Device and method for identifying a container
US7336902B1 (en) * 2002-06-06 2008-02-26 At&T Corp. Integrated electro-optic hybrid communication system
US7274876B2 (en) * 2002-06-06 2007-09-25 At&T Corp. Integrated electrical/optical hybrid communication system with revertive hitless switch
US7394988B1 (en) * 2002-07-09 2008-07-01 Sprint Communications Company L.L.P. Dual band wireless communication having high availability and high bandwidth
AU2003288646A1 (en) * 2003-01-08 2004-08-10 Koninklijke Philips Electronics N.V. Communication partner device for communication with another communication partner device over a first communication channel
WO2008109978A1 (en) * 2007-03-13 2008-09-18 Gennadii Ivtsenkov Cost-effective friend-or-foe (iff) battlefield infrared alarm and identification system
JP4539695B2 (en) * 2007-09-04 2010-09-08 ソニー株式会社 Remote control system, electronic device and control method
TWI364919B (en) * 2008-05-16 2012-05-21 Hon Hai Prec Ind Co Ltd Radio signal transceiver and communication system employing the same
KR100914850B1 (en) * 2009-03-27 2009-09-02 주식회사 아이디로 Back scattering type rfid communication system
ES2487621T3 (en) * 2009-05-06 2014-08-22 Tesat Spacecom Gmbh & Co. Kg Hybrid communication device for high-speed data transmission between mobile platforms and / or stationary platforms
US8816284B2 (en) * 2010-03-30 2014-08-26 Lawrence Livermore National Security, Llc. Room-temperature quantum noise limited spectrometry and methods of the same
US9086472B2 (en) * 2012-09-26 2015-07-21 Gennadii Ivtsenkov Multi-transceiver RF alert system for preventing hunting accidents
US9884180B1 (en) * 2012-09-26 2018-02-06 Verily Life Sciences Llc Power transducer for a retinal implant using a contact lens
US9562973B2 (en) * 2013-02-25 2017-02-07 Honeywell International Inc. Multimode device for locating and identifying items
IL242004B (en) * 2015-10-11 2021-08-31 Israel Aerospace Ind Ltd Identification friend or foe (iff) system and method
US10986392B2 (en) 2019-06-07 2021-04-20 Charter Communications Operating, Llc Hybrid IR/RF remote control system
GB2596344B (en) * 2020-06-26 2022-08-31 Airbus Operations Ltd Pointing Unit
US11777601B1 (en) * 2021-07-21 2023-10-03 T-Mobile Innovations Llc Systems and methods for providing wireless communications to a device using both optical and radio frequency transmission

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899038A (en) * 1981-12-09 1983-06-13 Oki Electric Ind Co Ltd Optical and milimeter wave complementary communication system
EP0338765A2 (en) * 1988-04-19 1989-10-25 Victor Company Of Japan, Limited Radio communication system for data transmission and reception
GB2222734A (en) * 1988-09-12 1990-03-14 Philips Electronic Associated Optical radiation demodulator circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466761A (en) * 1967-02-03 1969-09-16 Aai Corp Hit indicator arrangement
US3657543A (en) * 1968-07-24 1972-04-18 Optronix Inc Optical communications system with improved bias control for photosensitive input device
JPS62186537U (en) * 1986-05-16 1987-11-27
US4775996A (en) * 1987-09-30 1988-10-04 Northern Telecom Limited Hybrid telephony communication system
CA2047251C (en) * 1990-07-18 1995-07-18 Daisuke Ishii Radio communication apparatus which can be tested by radio and optical test signals
US5373152A (en) * 1992-01-31 1994-12-13 Nec Corporation Resonance-type optical receiver circuit having a maximum amplifier input controlled by using an amplifier feedback and its method of receiving

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899038A (en) * 1981-12-09 1983-06-13 Oki Electric Ind Co Ltd Optical and milimeter wave complementary communication system
EP0338765A2 (en) * 1988-04-19 1989-10-25 Victor Company Of Japan, Limited Radio communication system for data transmission and reception
GB2222734A (en) * 1988-09-12 1990-03-14 Philips Electronic Associated Optical radiation demodulator circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 200 (E - 196) 3 September 1983 (1983-09-03) *
SOREL ET AL: "10 Bbit/s transmission experiment over 165km of dispersive fibre using ASK-FSK modulation and direct detection", ELECTRONICS LETTERS., vol. 29, no. 11, 27 May 1993 (1993-05-27), STEVENAGE GB, pages 973 - 975 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1076909C (en) * 1995-06-14 2001-12-26 日本电气株式会社 Infrared space communication system capable of reducing process quantities of data communication device during communication
US8005364B2 (en) 1999-11-16 2011-08-23 Motorola Mobility, Inc. Method and apparatus for communicating in the presence of radio frequency energy
GB2360655B (en) * 1999-11-16 2003-07-23 Motorola Inc Wireless communication device and method having coordinated primary and secondary transmitters
US6782208B1 (en) 1999-11-16 2004-08-24 Motorola, Inc. Wireless communication device and method having coordinated primary and secondary transmitters
GB2360655A (en) * 1999-11-16 2001-09-26 Motorola Inc Wireless communication device having co-ordinated primary and secondary transmitters
US8126030B2 (en) 2005-08-31 2012-02-28 Motorola Mobility, Inc. Multi-mode wireless communication device and method
US8068013B2 (en) 2006-12-15 2011-11-29 Smk Corporation RF communication module and RF communication system
EP1933288A3 (en) * 2006-12-15 2009-09-02 SMK Corporation RF communication module and RF module communication system
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US9467119B2 (en) 2009-05-29 2016-10-11 Lg Electronics Inc. Multi-mode pointing device and method for operating a multi-mode pointing device
US8704958B2 (en) 2009-06-01 2014-04-22 Lg Electronics Inc. Image display device and operation method thereof

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