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)
05/1991
05/22/1991EP0428126A2 Paging signal control system in mobile communication system
05/22/1991EP0428119A2 Coherent optical-fibre communication system using polarisation-diversity transmission
05/22/1991EP0428099A2 A digital radio link system and a method of adjusting the transmission power in a digital radio link system
05/22/1991EP0427951A2 System to generate switching criteria and equalize adaptively in data spectrum
05/22/1991EP0313650A4 Microwave absorber attenuator for linear sspa power control
05/22/1991CN1051644A Anti-noise single-band communication radio station
05/21/1991US5018188 Microphone-controller with multifunction, single conductor
05/21/1991US5017926 Dual satellite navigation system
05/16/1991WO1991007044A1 Data and voice transmission over a cellular telephone system
05/16/1991WO1991007043A1 Improved microcell system for cellular telephone systems
05/16/1991WO1991007037A1 Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
05/16/1991WO1991007036A1 Diversity receiver in a cdma cellular telephone system
05/16/1991WO1991007025A1 Satellite communications system
05/16/1991WO1991007019A1 Zoned microcell with sector scanning for cellular telephone systems
05/16/1991WO1991006933A1 Satellite selective call signalling system
05/16/1991DE3937737A1 Interface circuit for digital transmission in multiplexed mode - has control unit coupled to buffers handling data transfer with peripherals
05/15/1991EP0427687A1 Method of choosing a base station, a radio channel and a time slot at a mobile station
05/15/1991EP0427283A2 Fast PSK carrier recovery in a mobile satellite communication network
05/15/1991CN1012632B Narrow band single frequency full-duplex radio communication system
05/15/1991CA2029791A1 Coherent optical-fibre communication system using polarisation-diversity transmission
05/14/1991WO1991007829A1 Method and apparatus for diversity reception of time-dispersed signals
05/14/1991US5016206 Unique word detection system
05/14/1991CA1284183C Portable radio telephone having power saver
05/08/1991EP0426452A2 Battery saving system for interrupting power supplies at intervals variable with traffic pattern
05/08/1991EP0426269A1 Mobile communications system
05/07/1991WO1991007024A1 Satellite signalling system having a signal beam with a variable beam area
05/07/1991WO1991007023A1 Satellite signalling system
05/07/1991US5014346 Rotatable contactless antenna coupler and antenna
05/07/1991US5014344 Method for synchronizing the transmissions in a simulcast transmission system
05/07/1991US5014342 Communication system employing a nine channel pattern allocation to eliminate interference
05/07/1991US5014314 Method for developing and transmitting usage context information in an RF communication system
05/07/1991CA2067809A1 Satellite signalling system having a signal beam with a variable beam area
05/07/1991CA2067570A1 Satellite signalling system
05/04/1991WO1991007022A1 Global communication system, receiver and method for operating the same
05/04/1991WO1991007021A1 Global satellite communication system with geographic protocol conversion
05/02/1991WO1991006156A1 Two-way communication system
05/01/1991CN1012551B Trunked communication system with nationwide roaming capability
05/01/1991CN1012548B Apparatus and method for obtaining frequency agility in digital communication system
04/1991
04/30/1991US5012469 Adaptive hybrid multiple access protocols
04/30/1991US5012234 User activated memory programming authorization in a selective call receiver
04/30/1991CA1283706C Portable radio communication apparatus having diversity receptionfunction
04/24/1991EP0424009A2 Automatic gain control circuit in a radio telephone receiver
04/24/1991EP0423512A2 Phase controlled antenna array for a microwave landing system (MLS)
04/24/1991EP0423200A1 Method of and apparatus for acknowledging and partially answering a paging signal.
04/24/1991EP0238621B1 Steered-beam satellite communication system
04/24/1991CN1050960A Device for evaluating and/or regulating throughput of virtual circuits on asynchronous time-division multiplex transmission channel
04/24/1991CN1050957A Zero passage signal homomorphic treating method and shortwave anti-fading receiving homomorphic treating method
04/23/1991US5010584 Mobile communication transceiver
04/23/1991US5010583 Repeater for a wide area coverage system
04/23/1991US5010570 Method for active feedback suppression
04/23/1991US5010566 Cordless telephone
04/23/1991US5010330 Paging system employing designated frame commencing information service data message transmission
04/23/1991US5010317 Satellite based simulcast paging system
04/23/1991CA1283455C Apparatus and method for transmitting digital data over a radio communications channel
04/20/1991WO1991006162A1 Method and device in a digital communication network
04/18/1991WO1991005420A1 Automatic frequency control of satellite transmitted spread spectrum signals
04/18/1991WO1990011675A3 Mixed modulation level communication system
04/18/1991WO1990010987A3 Energy saving protocol for a communication system
04/16/1991US5008952 Global satellite communication system with geographic protocol conversion
04/16/1991US5008900 Subscriber unit for wireless digital subscriber communication system
04/16/1991CA1283172C Diversity reception radio receiver
04/11/1991DE3942320A1 Communication system esp. for salt mine - uses single frequency phase locked loop radio system at base stations connected by wire to central station
04/10/1991EP0421722A2 Multiple beam deployable space antenna system
04/10/1991EP0421704A2 Telemetry, tracking and control for satellite cellular communication systems
04/10/1991EP0421698A2 Method of predicting cell-to-cell hand-offs for a satellite cellular communications system
04/10/1991EP0421601A2 Linearizer for QAM-receiver
04/10/1991EP0421533A1 Predistortion apparatus for a digital transmission system
04/10/1991EP0421532A1 Predistortion apparatus for a digital transmission system
04/10/1991EP0421423A2 Method of controlling filter time constant and filter circuit having the time constant control function based on the method
04/09/1991US5006855 Ranging and processing system for mobile surveillance and data link
04/09/1991CA1282880C Filter interconnection matrix
04/09/1991CA1282879C Beam-forming network
04/09/1991CA1282878C Satellite communications system having multiple downlink beams powered by pooled transmitters
04/09/1991CA1282834C Portable communications receiver with separate information presentation means and improved battery saving function
04/07/1991CA2026820A1 Predistortion arrangement for a digital transmission system
04/07/1991CA2026819A1 Predistortion arrangement for a digital transmission system
04/04/1991WO1991004618A1 Random access multiple user communication system
04/03/1991EP0420192A2 Unique word detection apparatus
04/03/1991EP0419674A1 Diversity receiving circuit
04/02/1991US5005209 Process and apparatus for the transmission of selective addresses and/or emergency messages in shortwave radio networks
04/02/1991US5005198 Cordless telephone apparatus
04/02/1991US5005189 Detection of digital signals received from multipath channels
04/02/1991CA1282462C Trunked communication system with nationwide roaming capability
03/1991
03/30/1991CA2026141A1 Automatic system steering of roamer units in a networked trunking environment
03/28/1991DE3932659C1 Room e.g. vehicle interior and-or object monitoring method - examining changes in EM field beam from transmitter and activating alarm when amplitude of detected signals exceeds set level
03/27/1991EP0419429A1 Method of reducing the risk for poor reception in a time multiplexed radio communication system
03/27/1991EP0418865A2 Wireless signal transmission system with random access
03/27/1991EP0418853A2 Method and system for testing mobile communication system
03/27/1991EP0418781A2 Dual polarization transmission system
03/27/1991EP0418265A1 Reception process and antenna system for mobile reception
03/27/1991CN1050294A Synchronizing method in mobile radio system
03/27/1991CN1050293A Method of reducing risk for poor reception in time multiplexed radio communication system
03/26/1991US5003619 Method and apparatus for adjusting the power of a transmitter
03/26/1991US5003617 Simulcast broadcasting system and method
03/26/1991US5003534 Link utilization control mechanism for demand assignment satellite communications network
03/26/1991CA1282126C Digital signal demodulation system
03/26/1991CA1282119C System and method for diversity reception of signals
03/20/1991EP0418103A2 Mobile radio communication system
03/20/1991EP0418096A2 Cellular radio communication system for use with low-power remote stations
03/20/1991EP0417682A1 Transponder used for positioning of a satellite
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