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)
10/1990
10/18/1990WO1990011675A2 Mixed modulation level communication system
10/17/1990EP0392132A2 Radio transceiver apparatus with booster
10/17/1990EP0392079A2 Radio transceiver
10/16/1990US4964121 Battery saver for a TDM system
10/10/1990EP0391783A2 Radio communication apparatus
10/10/1990EP0391597A2 Optical fiber microcellular mobile radio
10/10/1990CN1046078A Communications systems
10/10/1990CN1046074A Frequency control apparatus and method for digital radio receiver
10/09/1990US4962534 Frequency-diversity receiver system
10/09/1990US4962523 Radio telephone set used as portable set and vehicle-mounted set
10/04/1990WO1990011654A1 Paging terminal apparatus with user selectable page forwarding capability and methodology therefor
10/03/1990EP0390333A2 Communications systems
10/03/1990EP0390214A2 Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
10/03/1990EP0390069A2 Polarization diversity heterodyne receiver of a baseband combining type in which i.f. signals are adjusted by negative feedback from a device output signal
10/03/1990EP0389974A1 Frequency control apparatus and method for a digital radio receiver
10/03/1990EP0389848A2 Transmission power control system
10/03/1990EP0389737A2 Mobile radio telephone device
10/03/1990EP0389559A1 Moldable/foldable radio housing.
10/03/1990EP0389494A1 Automatic polarization control system for tvro receivers
09/1990
09/30/1990CA2012368A1 Communications systems
09/29/1990WO1990011656A1 Diversity receiving circuit
09/27/1990DE3909740A1 Device for reception and reproduction of signals which are transmitted by weather satellites
09/26/1990EP0388895A2 Variable transmission power type transmitter
09/26/1990EP0388894A1 A transmission power control system
09/26/1990EP0388893A2 Digital radio transmission system
09/26/1990EP0388609A2 Electronic antipilferage device and method for the operation of such a device
09/26/1990CN1045671A Full-compatibility railway dispatching system device with radio
09/26/1990CN1009790B Method and device for building up connection in shortwave radio networks
09/25/1990CA1274630A2 Subscriber unit for wireless digital telephone system
09/25/1990CA1274611A1 Method and apparatus for precision surveying using broadcast satellite signals
09/25/1990CA1274597A1 Communication system capable of interruption talk during data transmission
09/24/1990CA2012183A1 Spread spectrum communication device
09/20/1990WO1990010987A2 Energy saving protocol for a communication system
09/20/1990WO1990010980A1 Time domain radio transmission system
09/20/1990DE3908940A1 Radio system
09/20/1990DE3907733A1 Method and device for radio transmission in underground mines without waveguides
09/19/1990EP0387957A1 Method for information transmission in a radio data communication network, and a system for which the method is carried out
09/19/1990EP0387720A1 Circuit to recognise a reference frequency signal
09/19/1990EP0387447A2 Geostationary satellite system
09/19/1990CN2062529U Triple coherent carrier wave modulator
09/19/1990CN2062525U Wireless remote switch for household electric appliance
09/19/1990CN1045498A Initialization of communication channel between subscriber station and base station in subscriber communication system
09/19/1990CN1045497A Setting of electronic circuits
09/18/1990US4958359 Communication apparatus
09/18/1990CA1274283A1 Modified multi-path detector
09/18/1990CA1274281A1 Device for controlling the transmitting power of a radio link
09/18/1990CA1274280A1 Method of and control arrangement for selecting a control channel by a mobile radio station
09/12/1990EP0386877A1 Telecommunications system
09/12/1990EP0386874A2 Frequency synchronization of stations of a communication system
09/12/1990EP0386435A2 Wireless information transmission method
09/12/1990CN2062137U Self-control device for walking type radio station
09/12/1990CN1009610B Home unit for wireless digital telephone system
09/11/1990US4956864 Receiver for communications satellite down-link reception
09/11/1990US4956645 Radio system for data transmission with one passive end and station included in such a system
09/11/1990US4956643 Transponder with selective antenna beam using shared antenna feed elements
09/11/1990CA1274009A1 Tdma communication system having common local path medium and local time slot for intraoffice calls
09/05/1990CN2061747U Automatic coupling network interface of shortwave single-sideband and frequency modulation communication
08/1990
08/28/1990US4953197 Combination spatial diversity system
08/22/1990EP0383447A1 Telecommunications system
08/22/1990EP0382788A1 Nationwide display pager with location readout.
08/21/1990US4951279 Transceiver for use in earth station in satellite communications system
08/21/1990US4951044 Paging terminal apparatus with user selectable page forwarding capability and methodology therefor
08/21/1990CA1273065A1 Dual polarization transmission system
08/14/1990US4949395 Method and arrangement for dynamically allocating time slots to connections in a digital mobile radio system
08/14/1990CA1272817A2 Subscriber unit for wireless digital telephone system
08/14/1990CA1272816A1 Method of and circuit arrangement for switching- through a radio connection to another radio cell of a digital radio transmission system
08/14/1990CA1272762A1 Bidirectional system for transmitting informations between a ground control station and a mobile station
08/09/1990WO1990009066A1 Cellular telephone system
08/09/1990WO1990009065A1 Multiplexed synchronous/asynchronous data bus
08/08/1990CN1044559A Telecommunications system
08/08/1990CN1044558A Telecommunication system
08/08/1990CN1044557A Telecommunications system
08/07/1990US4947451 Multiple accessing satellite communication system having standby central station
08/01/1990EP0380372A1 Telecommunications system
08/01/1990EP0380212A2 Control for flexible probe
08/01/1990EP0380074A2 Subscriber station of subscriber radio system
08/01/1990CN1044370A Active signalling transmitter control
07/1990
07/31/1990US4945549 Trellis coded modulation for transmission over fading mobile satellite channel
07/31/1990CA1272317A1 Subscriber unit for wireless digital telephone system
07/31/1990CA1272316B Subscriber unit for wireless digital telephone system
07/31/1990CA1272315A1 Cordless telephone
07/31/1990CA1272284A1 Geographic blackout method for direct broadcast satellite system
07/31/1990CA1272246A1 Cell enhancer for cellular radio telephone system having diversity function
07/28/1990WO1990009073A1 Telecommunications system
07/28/1990WO1990009072A1 Telecommunications system
07/28/1990WO1990009071A1 Telecommunications system
07/27/1990CA2008458A1 Control for flexible probe
07/26/1990WO1990008438A1 Active signalling transmitter control
07/26/1990DE3938510A1 Antenna auxiliary amplifier circuit for antenna diversityreception
07/25/1990EP0379332A2 Cordless telephones
07/25/1990CN1008962B Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
07/24/1990US4943983 Subscriber unit for wireless digital telephone system
07/24/1990US4943808 Communications system with moving bodies with the aid of satellites
07/18/1990EP0377695A1 Interrogation and remote control device.
07/18/1990EP0211865B1 Supervisory tone detection
07/17/1990US4942622 Mobile radio-receiver system with improved reproduction characteristics of reception signal having noise superimposed thereon
07/10/1990US4941207 Structure for wireless communication in an electromagnetically shielded building
07/10/1990US4941200 Booster
07/10/1990US4941199 Uplink power control mechanism for maintaining constant output power from satellite transponder
07/10/1990US4940975 Radio pager receiver capable of readily checking whether or not memory backup is correct
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