Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 7 - Radio transmission systems, i.e. using radiation field
Patents for H04B 7 - Radio transmission systems, i.e. using radiation field (186,426)
07/1990
07/10/1990CA1271575A1 Radio telephone apparatus
07/10/1990CA1271574A1 Cordless telephone system
07/10/1990CA1271526A1 Cell enhancer for cellular radio telephone system having bandpass filter arrangement
07/04/1990EP0376666A1 The setting of electronic circuits
07/04/1990EP0376250A1 Self-adaptive equalization device for a differentially coherent demodulation arrangement
07/04/1990EP0375971A2 Circuitry for eliminating disturbances during reception by mobile radio receivers
07/04/1990CN1008678B Satellite communication system
07/04/1990CN1008675B Wave-packet shaping network
07/03/1990US4939792 Moldable/foldable radio housing
07/03/1990US4939791 Diversity radio receiver for use with multiple antenna, particularly car radio
07/03/1990US4939769 Cordless telephone system
07/03/1990US4939746 Trunked radio repeater system
07/03/1990CA1271223A1 Radio telephone system comprising vacant channel detection
06/1990
06/28/1990WO1990007129A1 Digital range correlator
06/28/1990CA2006159A1 Setting of electronic circuits
06/27/1990EP0375067A1 Power economising in multiple user radio systems
06/27/1990EP0375052A2 Communication device
06/27/1990EP0374787A2 Radio telephone system in private branch exchange configuration
06/27/1990EP0374562A1 Circuit for switching from one binary stream to another
06/27/1990EP0374427A1 Microwave device for the correction of the group propagation time
06/27/1990EP0374212A1 Multiple access communications system
06/27/1990CN1043414A Combination spatial diversity system
06/26/1990US4937822 Skywave adaptable communication apparatus
06/26/1990US4937818 Time division multiple access radio communication system
06/26/1990US4937812 Subsidiary station capable of automatically adjusting an internal delay in response to a number signal received in a downward signal by the subsidiary station
06/20/1990EP0373552A1 Method for measuring the signature of a digital transmission equipment, and device for carrying out the method
06/20/1990CN2058546U Microcomputerized digital-control device for planar radio switching command system
06/20/1990CN1043236A Digital automatic gain control
06/20/1990CN1043235A Power conservation method and apparatus for portion of synchronous information signal
06/19/1990US4935927 Base station emulator
06/19/1990US4934983 Data communication system having level control means
06/19/1990CA1270529A1 System for automatically tuning the antenna of a miniature portable communications device
06/15/1990CA2005594A1 Method and device for measuring the signature of a digital transmission equipment
06/14/1990WO1990006644A1 Digital automatic gain control
06/14/1990WO1990006635A1 A radio transceiver
06/14/1990WO1990006566A1 Power conservation method and apparatus for a portion of a synchronous information signal
06/13/1990EP0373067A1 Device for the synchronization of sending and receiving by a station in a communication network, especially for an automotive vehicle
06/13/1990DE3841464A1 Textile machine having assemblies for the maintenance and/or servicing of the work units
06/12/1990US4933963 Radio telephone apparatus
06/06/1990EP0371700A2 Digital automatic gain control
06/06/1990EP0371500A2 TDMA satellite communications system operating in wide and narrow aperture modes for receiving bursts of various timing deviations
06/06/1990EP0371358A2 Time delay compensation in a radio transceiver
06/06/1990CN1042812A Apparatus and method for obtaining frequency agility in digital communication system
06/05/1990US4932071 Aircraft voice communication anti-blocking device
06/05/1990US4932070 Mechanism for deriving accurate frequency reference for satellite communications burst demodulator
06/05/1990US4932049 Cellular telephone system
06/05/1990US4931802 Multiple spot-beam systems for satellite communications
05/1990
05/31/1990WO1990006018A1 Power amplifier for a radio frequency signal
05/30/1990EP0370915A1 Device and system for isofrequencial broadcasting with reduced interfrequencies
05/30/1990EP0370746A1 Radio receiver antenna systems
05/30/1990CN2057795U Transceiver automatic recording repeat transmiting unit
05/30/1990CN1042634A Frequency independent information transmission system
05/29/1990US4930149 Cordless telephone communication system
05/29/1990US4930118 Frame-interval fault detection in a demand assignment TDMA communication system
05/29/1990CA1269715A1 Method and device for building up a connection in shortwave radio networks
05/28/1990CA2003947A1 Radio transceiver
05/23/1990EP0369465A2 A relay receiver
05/23/1990EP0369135A2 Power amplifier for a radio frequency signal
05/23/1990EP0368970A1 Multiple-access communications system
05/23/1990DE3839421A1 Device for constant-level wireless transmission of modulated RF signals
05/22/1990US4928317 Radio-optical transmission system, in particular for space telecommunications
05/22/1990US4928274 Multiplexed address control in a TDM communication system
05/22/1990CA1269462A1 Two-hop collocated satellite communications system
05/17/1990WO1990005431A1 Method and apparatus for automatically adjusting the output power of a transmitter
05/17/1990WO1990005314A1 Improvements in the transmission and reception of electric signals carrying information
05/16/1990EP0368545A1 Improvements in the transmission and reception of electric signals carrying information
05/16/1990EP0368390A1 Amplification system for teledistribution
05/16/1990CN1042278A Satellite cellular telephone and date communication system
05/15/1990US4926498 FM diversity receiver
05/15/1990US4926422 On-board switching controller for a satellite with on-board switching
05/15/1990US4926413 Satellite communication subsystem with the capability of performing a non-interferring operational test
05/15/1990CA1269185A1 Satellite telecommunications system featuring multi- beam coverage and dynamically controlled allocation of the satellite transmission capacity
05/09/1990EP0366875A2 Wristwatch radiotelephone
05/08/1990US4924457 Concentrator system with polling-response means for detecting failures to stop tariff charges on locally established intraoffice calls
05/08/1990CA1268868A1 Arrangement for processing received data in tdma communications system and method therefor
05/03/1990WO1990004889A1 Improved simulcast broadcasting system and method
05/03/1990CA2001495A1 Transmission and reception of electric signals carrying information
05/02/1990EP0365885A2 Satellite cellular telephone and data communication system
05/02/1990CN1041857A Point-to-multipoint communication method with exchange function
05/02/1990CN1007862B Satellite communication system with high-gain down-beam of frequency addressing
05/02/1990CN1007861B Antenna diversity reception system for eliminating interference
05/01/1990US4921464 Radio channel search system
04/1990
04/25/1990CN1041677A Narrow band single frequency full-duplex radio communication system
04/25/1990CN1041676A Location-based adaptive radiotelephone control
04/24/1990CA1268239A1 Method and apparatus for precision dynamic differential positioning
04/24/1990CA1268216A1 Techniques for cross-polarization cancellation in a space diversity radio system
04/19/1990WO1990004314A1 High data rate simulcast communication system
04/19/1990WO1990004293A1 Location-based adaptive radio control
04/18/1990EP0364190A2 Diversity transmission and reception method and equipment
04/18/1990EP0363998A2 Portable communications receiver with improved battery saving function
04/18/1990EP0363492A1 Radio communication system and its control method
04/18/1990CN2056297U Call sign frequency selector for portable or truck-mounted radio station
04/18/1990CN1041496A Trunk line type "multiple addresses at one point" communication method
04/17/1990US4918437 High data rate simulcast communication system
04/17/1990US4918431 Method and apparatus for automatically adjusting the output power of a transmitter
04/17/1990CA1267973A1 Automobile antenna system for diversity reception
04/17/1990CA1267961A1 Multiple access radio telephone system selectively operating on full-duplex and half-duplex modes
04/12/1990DE3833709A1 Diversity reception method for mobile reception
04/10/1990CA1267737A1 Base station capable of monitoring occurrence of interference on every transmission
04/05/1990WO1990003667A1 Automatic polarization control system for tvro receivers
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