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)
06/1989
06/27/1989US4842221 Lightning hardened tether cable and an aerostat tethered to a mooring system therewith
06/21/1989EP0321454A2 A method of operating a multiple access communications system
06/21/1989EP0320913A2 A method for locating a mobile station, as well as a mobile station and a base station for carrying out the method
06/20/1989US4841526 Data communications system
06/20/1989CA1256225A1 Computer-controlled cordless telephone
06/14/1989EP0319782A2 Radio wave receiver with several antennas
06/13/1989CA1255821A1 State information communication in a tdma satellite communication network with high frame availability
06/07/1989EP0319211A2 Radio telephone apparatus
06/07/1989EP0318911A2 Frame-interval fault detection in a demand assignment TDMA communication system
06/07/1989EP0318689A2 Method and circuit for trimming the frequency of a frequency source
06/07/1989EP0318686A2 TDMA Radio system employing BPSK synchronisation for QPSK signals subject to random phase variation and multipath fading
06/07/1989EP0318685A2 Phase coherent TDMA quadrature receiver for multipath fading channels
06/07/1989EP0318684A2 Rapid reference acquisition and phase error compensation for radio transmission of data
06/07/1989EP0318665A2 Antenna selection control circuit
06/06/1989US4837812 Dual connection mode equipped communication control apparatus
06/06/1989US4837802 Radio communication method and system
06/06/1989US4837801 Base station capable of monitoring occurrence of interference on every transmission
06/06/1989US4837786 Technique for mitigating rain fading in a satellite communications system using quadrature phase shift keying
06/01/1989WO1989005078A1 Optical communications network
06/01/1989WO1989005077A1 Optical communications network
06/01/1989WO1989005070A1 Optical communications network
06/01/1989WO1989005069A1 Optical communications network
06/01/1989WO1989005066A1 Moldable/foldable radio housing
06/01/1989WO1989005009A1 Paging terminal apparatus with message storage and retransmission capability and method therefor
05/1989
05/31/1989EP0318335A1 Fault location in optical communications networks
05/31/1989EP0318333A1 Stations for a digital communications network
05/31/1989EP0318332A1 Synchronisation of digital communications network
05/31/1989EP0318331A1 Scrambling in a digital communications network
05/31/1989EP0317974A2 Satellite business communication system capable of monitoring a plurality of aperture terminals through a public communication network
05/31/1989EP0317799A1 On-board switching controller for a satellite with on-board switching
05/30/1989US4835483 QAM demodulator with rapid resynchronization function
05/30/1989CA1255025A1 Radio telephone system and method for controlling same
05/30/1989CA1255019A1 Device for predicting unique word detection positions in a tdma station by using latest valid detection positions
05/24/1989EP0316544A1 Method of dimensioning of antenna receiving systems for mobile reception
05/24/1989CN1004321B Duplex operational communication methods between fixed stations and movable stations
05/24/1989CN1004319B Duplex interconnect / dispatch trunked radio system
05/23/1989US4833701 Trunked communication system with nationwide roaming capability
05/23/1989US4833695 Apparatus for skew compensating signals
05/23/1989US4833674 Arrangement for processing received data in TDMA communications system and method therefor a TDMA communications system and method for retrieving received data in a preset order
05/23/1989US4833484 Earth terminal for satellite communication
05/23/1989CA1254681A1 Time division multiple access radio communication system
05/23/1989CA1254654A1 Automobile antenna system
05/18/1989WO1989004569A1 Communications apparatus
05/17/1989EP0315990A2 Interference canceller and method of interference cancelling
05/16/1989US4831619 Satellite communications system having multiple downlink beams powered by pooled transmitters
05/16/1989CA1254313A1 Station of a tdma communication network capable of quickly changing communication traffic without causing an overlap between transmission bursts
05/10/1989EP0315260A2 Cellular telephone apparatus
05/10/1989EP0314962A2 Automatic transmit power level control in radio links
05/09/1989US4829591 Portable radio
05/09/1989US4829543 Phase-coherent TDMA quadrature receiver for multipath fading channels
05/09/1989US4829519 Automatic cell transfer system with error rate assessment
05/05/1989WO1989004103A1 Nationwide display pager with location readout
05/05/1989WO1989004093A1 Passive universal communicator
05/05/1989WO1989004092A1 Reception process and reception antenna system for implementing the process
05/05/1989WO1989004086A1 Improvements relating to mixer circuits
05/03/1989EP0314101A1 Radiofrequency-optical transmission system, especially in the field of satellite communications
05/03/1989EP0313650A1 Microwave absorber attenuator for linear sspa power control.
05/02/1989US4827474 System and method of adjusting the interstation delay in an information transmission system
05/02/1989US4827421 Telecommunications satellite system on quasi-stationary orbits
05/02/1989US4827268 Beam-forming network
05/02/1989CA1253638A1 Satellite communication system
05/02/1989CA1253573A1 Cross-polarization interference canceller
04/1989
04/27/1989EP0247186A4 Power control system for satellite communications.
04/26/1989EP0313054A2 Transceiver for use in earth station in satellite communications system
04/26/1989EP0312690A2 Radio network
04/25/1989US4825448 Subscriber unit for wireless digital telephone system
04/25/1989US4825193 Acknowledge back pager with adaptive variable transmitter output power
04/25/1989CA1253212A1 Mobile station and a mobile radio communication network in which electric power is saved without reduction of an activity ratio of radio communication channels
04/20/1989WO1989003624A1 Radio arrangement having two radios sharing circuitry
04/20/1989WO1989003613A1 A current switching arrangement
04/19/1989EP0311919A2 Satellite communications system employing frequency reuse
04/18/1989US4823398 Diversity receiver
04/18/1989US4823373 Line switching control system for mobile communication
04/18/1989US4823341 Satellite communications system having frequency addressable high gain downlink beams
04/18/1989US4823339 Method and device for protecting modems against echoes
04/18/1989US4823142 Automobile antenna system
04/18/1989CA1252858A1 Security arrangement for cordless telephone system
04/18/1989CA1252857A1 Interference canceler with difference beam
04/18/1989CA1252844A1 Bootstrapping cross-polarization canceler with a noise-blanking limiter
04/18/1989CA1252823A1 Reversible energy spreading data transmission technique
04/12/1989EP0310939A2 Satellite-based vehicle communication/position determination system
04/12/1989EP0310876A2 Radio arrangement having two radios sharing circuitry
04/12/1989EP0186684B1 Radiotelephone transmission power control
04/11/1989USRE32905 Satellite communications system and apparatus
04/11/1989US4821308 Telephone answering system with paging function
04/11/1989US4821270 Method for decoding data transmitted along a data channel and an apparatus for executing the method
04/11/1989US4821261 Packet transmission of digital signals over a high capacity channel, particularly over a satellite broadcasting channel
04/11/1989US4821042 Vehicle antenna system
04/11/1989CA1252584A1 Line switching circuit for cordless telephone
04/05/1989EP0309855A2 Method and apparatus for transmitting selective addresses and/or distress signals in short-wave radio networks
04/04/1989US4819272 Intermittently driven transmitter
04/04/1989US4819227 Satellite communications system employing frequency reuse
03/1989
03/28/1989US4817190 Method for dynamically regrouping subscribers on a communications system
03/28/1989US4817117 Method of and circuit arrangement for ensuring bit synchronization of a data block in a receiver
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/28/1989US4816838 Portable receiving antenna system
03/28/1989US4816774 Frequency synthesizer with spur compensation
03/23/1989WO1989002628A1 Shopping cart display system
03/23/1989DE3730394A1 Method for transmitting signals in the microwave band, especially the millimetric waveband, and an arrangement for carrying out the method
03/22/1989EP0307962A2 Time division multiple access radio communication system
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