| Patents for H04B 7 - Radio transmission systems, i.e. using radiation field (186,426) |
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| 08/07/1991 | EP0439515A1 Improved simulcast broadcasting system and method |
| 08/06/1991 | US5038399 Method for assigning channel reuse levels in a multi-level cellular system |
| 08/06/1991 | US5038398 Method of assigning communication links in a dynamic communication network |
| 08/06/1991 | US5038341 Relay communication system |
| 08/06/1991 | US5038150 Feed network for a dual circular and dual linear polarization antenna |
| 08/06/1991 | CA1287378C Apparatus for judging quality of mobile data communication |
| 08/05/1991 | CA2009355A1 Calving detector |
| 07/31/1991 | EP0439319A1 Automobile radio telephone apparatus capable of detecting a drop of power source voltage |
| 07/31/1991 | EP0438934A2 Distribution system for very high frequency signals |
| 07/31/1991 | EP0438770A1 Power saving circuit in a mobile device for wireless communication |
| 07/31/1991 | EP0438463A1 High data rate simulcast communication system. |
| 07/31/1991 | CN1013423B Full-compatibility railway dispatching system device with radio |
| 07/30/1991 | US5036523 Automatic frequency control of satellite transmitted spread spectrum signals |
| 07/30/1991 | US5036331 Adaptive polarization combiner |
| 07/24/1991 | EP0438275A2 Improved data router with burst shuffling and deshuffling output buffers |
| 07/24/1991 | EP0438199A2 Radio receiver |
| 07/24/1991 | EP0438137A2 Radio telecommunication apparatus |
| 07/24/1991 | EP0437835A1 Frame synchronization system among multiple radio base stations for TDMA digital mobile communication system |
| 07/24/1991 | CN2081613U Intercontrol simplex repeater |
| 07/24/1991 | CN1053336A Communication satellite data collection method without person on duty |
| 07/23/1991 | US5034997 Communication system for data transmission and reception using radio wave and optical transmission of message signals |
| 07/23/1991 | US5034961 Area communications system |
| 07/23/1991 | CA1286811C Method of connecting a cordless telephone by radio |
| 07/23/1991 | CA1286726C Mobile telephone terminal having function to perform call clear process |
| 07/17/1991 | EP0437190A2 Polarization converter application for accessing linearly polarized satellites with single- or dual-circularly polarized earth station antennas |
| 07/17/1991 | EP0436875A2 Common wave radio system |
| 07/17/1991 | EP0436866A2 Commercial satellite communications system |
| 07/17/1991 | EP0436714A1 Code distribution multiple access communication system with user voice activated carrier and code synchronization. |
| 07/17/1991 | CN1053157A Method of transmitting wide-band digital signal in subsystem cellular chains by synchron digital multiplex hierarchy network |
| 07/17/1991 | CA2032954A1 Data router with burst shuffling and deshuffling output buffers |
| 07/16/1991 | US5033108 Signal repeater using shared amplification with selectable input/output connections |
| 07/16/1991 | CA1286429C Time division multiple access radio communication system |
| 07/11/1991 | WO1991010305A1 Method and device for the synchronization between a base radio station and a mobile radio station in a digital radiomobile system |
| 07/11/1991 | WO1991010300A1 Multiple frequency scanning in a selective call communication system |
| 07/11/1991 | WO1991010299A1 Reception aerial process and system |
| 07/11/1991 | WO1991010295A1 Receiver for a digital radiomobile system with cancellation of isofrequency interfering signals having the same kind of modulation, and relevant method |
| 07/10/1991 | EP0435964A1 Energy saving protocol for a communication system |
| 07/09/1991 | US5031231 Mobile telephone station with power saving circuit |
| 07/09/1991 | US5031193 Method and apparatus for diversity reception of time-dispersed signals |
| 07/09/1991 | CA1286041C Tdma communication system having common time slots for system maintenance |
| 07/09/1991 | CA1286040C Microcellular communications system using macrodiversity |
| 07/09/1991 | CA1285995C System for off-the-air reprogramming of communication receivers |
| 07/09/1991 | CA1285993C Radio telephone apparatus |
| 07/09/1991 | CA1285992C Method and apparatus for automatically adjusting the output power of a transmitter |
| 07/04/1991 | DE4001810C1 Power saving circuit for mobile radio transceiver - allows battery power for transmission to be set according to distance to base station |
| 07/03/1991 | EP0435664A2 Radio communication apparatus for a selected one of a plurality of terminal units of different kinds |
| 07/02/1991 | US5029233 Radio arrangement having two radios sharing circuitry |
| 07/02/1991 | US5029232 Satellite communications network |
| 07/02/1991 | US5029183 Packet data communication network |
| 06/27/1991 | WO1991010294A1 Paging system employing designated batch information service data message transmission |
| 06/27/1991 | WO1991010293A1 Paging system employing designated frame commencing information service data message transmission |
| 06/26/1991 | EP0434651A1 A method of effecting channel estimation for a fading channel when transmitting symbol sequences |
| 06/26/1991 | EP0434435A2 Microphone-controller with multifunction single conductor |
| 06/26/1991 | EP0434294A2 A power control method for a voltage controlled power amplifier and circuitry used in the method |
| 06/26/1991 | EP0434231A2 Paging accessory for portable computing devices |
| 06/26/1991 | EP0433314A1 Multiple frequency message system |
| 06/25/1991 | US5027431 Radio communication apparatus |
| 06/25/1991 | US5027428 Power saving arrangement and power saving method |
| 06/25/1991 | US5027371 Self-adaptive equalizer circuit for a differentially coherent demodulation installation |
| 06/25/1991 | CA1285338C Satellite-based vehicle communication/position determination system |
| 06/23/1991 | WO1991010333A1 Radio communication system based on digital localisation points |
| 06/23/1991 | WO1991010296A1 A method of effecting channel estimation for a fading channel when transmitting symbol sequences |
| 06/23/1991 | CA2025307A1 Fading bit error protection for digital cellular multi-pulse speech coder |
| 06/21/1991 | WO1991009485A1 Microphone-controller with multifunction, single conductor |
| 06/19/1991 | EP0432198A1 Method and system in a wide area radio communication network. |
| 06/19/1991 | CN2079390U Mutual control type differential conversion table |
| 06/18/1991 | US5025485 Multi-feed, multi-channel communication system |
| 06/18/1991 | US5025453 Method of measuring the signature of digital transmission equipment, and apparatus for implementing such a method |
| 06/18/1991 | CA1285051C Roadside beacon system |
| 06/15/1991 | WO1991009473A1 Satellite based acknowledge-back paging system |
| 06/13/1991 | WO1991008629A1 Wireless in-building telecommunications system for voice and data communications |
| 06/13/1991 | DE3940852A1 Diversity antenna circuit for automobile - uses processor to control switching between different antenna elements |
| 06/12/1991 | EP0431896A2 Power amplifying unit using a power amplifying module |
| 06/12/1991 | EP0431341A2 Interfering signal rejection circuitry for electronic article surveillance system and method employing same |
| 06/12/1991 | EP0431126A1 Frequency-jumping data transmission on a meteorite channel |
| 06/11/1991 | US5023934 Apparatus and method for communication of visual graphic data with radio subcarrier frequencies |
| 06/11/1991 | US5023932 Radio communication system comprising a portable unit carrying out a battery saving operation related to a scanning operation of a fixed unit |
| 06/11/1991 | US5023930 Booster with detectable boost operation |
| 06/11/1991 | US5023889 Trellis coded multilevel DPSK system with doppler correction for mobile satellite channels |
| 06/11/1991 | US5023620 Cross-polarization interference cancellation system capable of stably carrying out operation |
| 06/11/1991 | US5023594 Electromagnetic radiation |
| 06/09/1991 | WO1991009502A1 Process and device for transmitting video signals in a confined medium |
| 06/09/1991 | CA2069748A1 Process and device for transmitting video signals in a confined spaces |
| 06/06/1991 | WO1991008622A1 Dual satellite navigation method and system |
| 06/05/1991 | EP0430605A2 Frequency detector based on a digital phase lock loop |
| 06/05/1991 | EP0430587A2 Relay communication system |
| 06/05/1991 | EP0430481A2 Method and apparatus for diversity reception of time-dispersed signals |
| 06/05/1991 | EP0429888A2 Method for transmitting a digital wide-band signal in a tributary group system over a network of a synchronous digital multiplex hierarchy |
| 06/05/1991 | EP0429871A2 Cellular telephone system capable of reducing intermodulation distortion at portable telephone |
| 06/05/1991 | CN1052014A Method and apparatus for diversity reception of time-dispersed signals |
| 06/04/1991 | US5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels |
| 05/31/1991 | WO1991008652A1 Satellite based simulcast paging system |
| 05/30/1991 | WO1991007838A1 Remote access telephone control system |
| 05/30/1991 | WO1991007827A1 Dynamically equalized communication devices |
| 05/29/1991 | EP0428619A1 Mobile radio paging test system |
| 05/29/1991 | DE3938717A1 FM HF signal changeover switching - uses diversity functioning only when preset min.. signal level is present and specifically defined |
| 05/28/1991 | US5020131 Transponder frequency offset compensation with recurrently assigned unique words |
| 05/28/1991 | US5020056 Reduction of synchronous fading effects by time hopping of user slots in TDMA frames |
| 05/28/1991 | US5019910 Apparatus for adapting computer for satellite communications |
| 05/22/1991 | EP0428199A2 Receiver for digital communication system with channel estimator |