| Patents for H04B 7 - Radio transmission systems, i.e. using radiation field (186,426) |
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| 03/20/1991 | CN1012119B Design method and apparatus of single frequency duplexer communication system |
| 03/19/1991 | US5001471 Paging system employing designated batch information service data message transmission |
| 03/19/1991 | CA1281822C Subsidiary station capable of automatically adjusting an internal delay in response to a number signal received in a downward signal by the subsidiary station |
| 03/19/1991 | CA1281778C Fm receiver with improved response to rayleigh faded companded signals |
| 03/19/1991 | CA1281777C Detachable battery pack with a built-in broadband antenna |
| 03/19/1991 | CA1281776C Paging system |
| 03/15/1991 | CA2025407A1 Cellular radio communication system for use with low-power remote stations |
| 03/15/1991 | CA2025406A1 Mobile radio communication system |
| 03/15/1991 | CA2025240A1 Satellite position-fixing transponder |
| 03/14/1991 | DE4026698A1 Synchronisationsverfahren in einem mobilfunksystem Synchronization method in a mobile communications system |
| 03/14/1991 | DE3930598A1 Radio receiving station for eurosignal information - uses modular receivers selecting different frequencies examined by selection circuit for re-transmission in restricted area |
| 03/13/1991 | WO1991004620A1 Synchronizing method in a mobile radio system |
| 03/13/1991 | WO1991004615A1 Method of reducing the risk for poor reception in a time multiplexed radio communication system |
| 03/13/1991 | EP0416692A2 Communicating information by radio |
| 03/13/1991 | EP0416613A2 Transmission power control circuit |
| 03/13/1991 | EP0416462A2 Power management system for a worldwide multiple satellite communications system |
| 03/13/1991 | EP0416264A2 Adaptive polarization combining system |
| 03/13/1991 | EP0415979A1 Communication system having a packet structure field. |
| 03/13/1991 | EP0211849B1 Pager system and communication protocol |
| 03/13/1991 | CA2041647A1 Method of reducing the risk for poor reception in a time multiplexed radio communication system |
| 03/12/1991 | US4999637 Creation of artificial ionization clouds above the earth |
| 03/07/1991 | WO1991003136A1 Method of, and primary station for, operating a telephone system |
| 03/07/1991 | WO1991003111A1 A method of adapting a mobile radio communication system to traffic and performance requirements |
| 03/07/1991 | CA2021905A1 Adaptive polarization combining system |
| 03/06/1991 | WO1991003911A1 Cellular radiotelephone communications system |
| 03/06/1991 | EP0415898A1 A method of adapting a mobile radio communication system to traffic and performance requirements |
| 03/06/1991 | EP0415897A1 A method of reducing the power requirements in a mobile radio receiver |
| 03/06/1991 | EP0414760A1 Reception process and antenna system for mobile reception |
| 03/06/1991 | CN1011937B Cellular voice and data radiotelephone system |
| 03/05/1991 | US4998290 Frequency-hopping radio communication network |
| 03/05/1991 | CA1281079C Diversity receiver |
| 03/01/1991 | WO1991003884A1 Battery saver for a tdm system |
| 03/01/1991 | CA2284577A1 Communication system for single point emergency lighting |
| 02/27/1991 | EP0414534A2 An anti-intrusion defeator and locator for communication satellites |
| 02/27/1991 | EP0414352A2 Radio transmitter with output power control |
| 02/27/1991 | EP0413759A1 A method and arrangement for channel monitor and control. |
| 02/27/1991 | CN1049581A Subscriber unit for wireless digital subscriber communication system |
| 02/26/1991 | US4996697 Deglitching means for digital communication systems |
| 02/26/1991 | US4996526 Power conservation method and apparatus for a portion of a synchronous information signal |
| 02/20/1991 | EP0413369A1 A portable pager |
| 02/20/1991 | CN1049433A Automatic near frequency relay method of self-adapting distance of radio-station |
| 02/19/1991 | US4995097 Radio system to allow for exchanging messages between a set of stations |
| 02/19/1991 | US4995096 Demand-assignment multiple access control system |
| 02/19/1991 | US4995072 Self-powered base and remote telephone communication set |
| 02/19/1991 | US4995055 Time shared very small aperture satellite terminals |
| 02/19/1991 | US4994802 Subscriber unit for wireless digital telephone system |
| 02/19/1991 | CA1280472C Digital demodulation system having independently operating cross-polarization cancellers |
| 02/19/1991 | CA1280468C Radio data transmission system |
| 02/14/1991 | DE3926336A1 Aerial diversity mobile receiver system for TV signals - carries out TV signal test during horizontal blanking-out period, with better signal selection |
| 02/13/1991 | EP0412852A2 Portable radio transceiver system having improved adaptor for transceiver and/or improved receive signal control arrangement |
| 02/13/1991 | EP0412616A2 Receiver for time-varying distorted data signals |
| 02/13/1991 | EP0412583A2 Method and apparatus for controlling a TDM communication device |
| 02/13/1991 | EP0412574A2 Antenna for watch pager system |
| 02/13/1991 | EP0412235A2 Diversity reception control circuit |
| 02/12/1991 | US4993047 Volterra linearizer for digital transmission |
| 02/12/1991 | US4993021 Automatic transmit power level control in radio links |
| 02/12/1991 | US4992798 Interference canceller |
| 02/12/1991 | US4992753 Power amplifier for a radio frequency signal |
| 02/12/1991 | CA1280228C Digital radio transmission system |
| 02/12/1991 | CA1280172C Radio telephone system |
| 02/06/1991 | EP0411878A2 Power control arrangement for a radio communication system |
| 02/06/1991 | EP0411756A2 Radio telephone receiver with gain control |
| 02/06/1991 | EP0411677A2 Dispatch trunked radio system |
| 02/06/1991 | EP0411538A2 Satellite communications system operating in asynchronous mode for central-to-terminal station transmission |
| 02/06/1991 | EP0411028A1 Mobile radio systems. |
| 02/06/1991 | CN1011561B Base station for wireless digital telephone system |
| 02/05/1991 | US4991209 Random local message encryption |
| 02/05/1991 | US4991198 Interconnection control method in cordless telephone system |
| 02/05/1991 | US4991164 Automatic transmit power level control in radio links |
| 02/04/1991 | WO1991002415A1 Code distribution multiple access communication system with user voice activated carrier and code synchronization |
| 01/30/1991 | EP0410474A2 Cross-polarization interference cancellation system capable of stably carrying out operation |
| 01/30/1991 | EP0410266A2 Circuit for switching a digital service channel of a radio relay |
| 01/30/1991 | EP0410036A1 Commodity information retrieval system |
| 01/30/1991 | CN1011462B Transmission method and receiver of digital signal packet on the great capacity of transmission path |
| 01/29/1991 | US4988962 Circuit for correcting group delay at microwave frequencies |
| 01/23/1991 | EP0409721A1 Satellite and method of bringing into orbit by gravitational assistance |
| 01/23/1991 | EP0409263A2 Radio apparatus, read/write device and method for reading/writing an identification code in the radio apparatus |
| 01/23/1991 | EP0409171A2 Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property |
| 01/23/1991 | EP0220314B1 Reversible energy spreading data transmission technique |
| 01/23/1991 | EP0204813B1 Duplex interconnect/dispatch trunked radio system |
| 01/17/1991 | DE3922384A1 Process for automatic change of radio transmission channel - allows participants to switch channels if interference continues to effect transmission |
| 01/17/1991 | DE3910944C1 Arrangement for setting up radio traffic between mobile stations in underground mining |
| 01/16/1991 | EP0408086A2 Watch pager system |
| 01/16/1991 | EP0407958A1 Reception apparatus for directional radio links |
| 01/15/1991 | US4985706 Process for data transmission by means of a geo-stationary satellite and at least one sub-satellite |
| 01/15/1991 | CA1279122C Fast sequencing demodulation method and apparatus |
| 01/09/1991 | EP0407367A2 Method and arrangement for dynamically allocating time slots to connections in a digital mobile radio system |
| 01/09/1991 | EP0407260A1 Gain matching apparatus for the reception of radio communication signals |
| 01/09/1991 | EP0406905A2 Dual donor booster system |
| 01/09/1991 | EP0406365A1 Digital range correlator. |
| 01/09/1991 | EP0115499B1 Selective call paging and priority signalling system |
| 01/09/1991 | CN1048472A Mobile assisted handoff |
| 01/09/1991 | CN1011179B Interconnect matrix of filter |
| 01/08/1991 | US4984247 Digital radio transmission system for a cellular network, using the spread spectrum method |
| 01/07/1991 | CA2019814A1 Dual donor booster system |
| 01/03/1991 | CA2019962A1 Communication unit identification method and apparatus |
| 01/02/1991 | EP0406193A2 A method for synchronizing a mobile unit and a base station |
| 01/02/1991 | EP0406186A2 Mobile assisted handoff |
| 01/02/1991 | EP0405783A2 Burst mode transmitter/receiver unit |
| 01/02/1991 | EP0405714A2 Self-powered base and remote telephone communication set |