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)
01/1991
01/02/1991EP0405676A2 Direct-conversion FSK receiver having a DC output independent of frequency drift
01/02/1991EP0405372A1 Multiple-beam array antenna
01/02/1991EP0405074A2 Hand-held bar code scanner
01/02/1991CA1278604C Line switching control system for mobile communication
01/01/1991US4982186 Pulse train relay
12/1990
12/31/1990WO1991000656A1 Frequency-jumping data transmission on a meteorite channel
12/31/1990CA2035433A1 Method for the transmission of data using frequency hopping on a radio channel having a low availability rate and corresponding receiving device
12/31/1990CA2018510A1 Self-powered base and remote telephone communication set
12/29/1990CA2019266A1 Burst mode transmitter/receiver unit
12/27/1990WO1991000660A1 Synchronization and equalization in a tdma cellular system
12/27/1990WO1991000658A1 Method for synchronization in a cellular mobile radio system
12/27/1990WO1991000657A1 Mobile assisted handoff
12/27/1990WO1990016118A1 Space-diversity digital radio mobile receiver and relevant process
12/27/1990EP0404173A2 Multiple access satellite communication system for mini-earth station networks
12/27/1990EP0207091B1 Two-hop collocated satellite communications system
12/27/1990EP0115507B1 General purpose data control system
12/25/1990US4980924 HF radio communication systems with frequency management
12/25/1990US4980677 Satellite business communication system capable of monitoring a plurality of aperture terminals through a public communication network
12/20/1990DE3215975C1 Multi-channel directional ratio system - combines available channels on transmitting side in digital form in time-multiplexing framework
12/19/1990EP0403339A1 Transmission base for a radio telephonic communication arrangement
12/19/1990EP0403151A2 Mobile telephone device adapted for carrying out an aging operation
12/19/1990CN2067879U Mutual control type simplex system repeater
12/19/1990CN1047952A Intersystem communication system
12/18/1990US4979231 Two-way radio for use in a communication system
12/18/1990US4979170 Alternating sequential half duplex communication system
12/18/1990CA1278114C Satellite communications system employing frequency reuse
12/12/1990EP0401974A2 Single frequency radio transmission system
12/12/1990EP0401916A2 Identification search for telecommunication devices
12/12/1990EP0401221A1 Reception process and reception antenna system for implementing the process.
12/12/1990EP0246226A4 Pointing compensation system for spacecraft instruments
12/12/1990CN1010805B Single antenna, multipolarization, frequency modulated continuous-wave radar
12/11/1990US4977616 Antenna selection control circuit
12/11/1990US4977615 Diversity receiver
12/11/1990US4977593 Optical communications network
12/11/1990US4977406 For receiving polarized waves
12/11/1990US4977399 Mobile radio paging test system
12/11/1990US4976520 Common path multichannel optical processor
12/05/1990EP0400001A1 Multipath reduction system
12/05/1990EP0335931A4 Shopping cart display system
12/05/1990CN1047594A Rapid receiver signal strength indication
12/04/1990US4975681 Interfering signal rejection circuitry and electronic article surveillance system and method employing same
12/01/1990WO1990015488A1 Method of establishing communication between independent communication systems
12/01/1990CA2057911A1 Method of establishing communication between independent communication system
11/1990
11/29/1990WO1990014646A1 User activated memory programming authorization in a selective call receiver
11/29/1990DE3916749A1 Spatially limited radio communication control - confines transmission and reception within specific region through frequency control
11/28/1990EP0399845A2 Rapid receiver signal strength indication
11/28/1990EP0399612A2 Data transmission over a time division duplex channel
11/28/1990EP0399611A2 A communications system for data transmission over a time division duplex frequency channel
11/28/1990EP0399206A1 Signal routing system
11/28/1990EP0398911A1 Trunked communication system with nationwide roaming capability.
11/28/1990EP0215117B1 Spread spectrum adaptive antenna interference canceller
11/27/1990WO1990014730A1 Rapid received signal strength indication
11/27/1990US4973952 Shopping cart display system
11/27/1990CA1277017C Fast assignment technique for use in a switching arrangement
11/27/1990CA1276984C Intermittent driven transmitter
11/25/1990WO1990014720A1 Signal routing system
11/22/1990EP0398773A1 Pseudosynchronisation-method for a time division multiplexed communication network and use of same
11/22/1990EP0398710A2 Diversity receiving apparatus
11/22/1990EP0398169A1 Car radio with a digital equalizing network
11/22/1990DE4014133A1 Planarantenne Planar
11/21/1990CN2066205U Satellite tv combined receiving antenna
11/20/1990US4972506 Method of transmitting data information in a mobile, cellular radio communication system
11/20/1990US4972439 Active signalling transmitter control
11/20/1990US4972434 Receiver for a space diversity radio transmission system, the receiver including a diversity combiner
11/20/1990US4972432 Multiplexed synchronous/asynchronous data bus
11/20/1990US4972410 Method and apparatus for controlling signal coherency in simulcast systems
11/20/1990US4972346 High-frequency signal booster
11/20/1990US4972275 Wideband radio-frequency broadcast recorder and radio testing system
11/20/1990US4972151 Steered-beam satellite communication system
11/20/1990CA1276696C Method and apparatus for optical rf phase equalization
11/20/1990CA1276695C Method and apparatus for optical rf amplitude equalization
11/20/1990CA1276688C Method of digital signal transmission
11/20/1990CA1276683C Data transmission system
11/15/1990WO1990013828A1 Introduction system for locating compatible persons
11/15/1990DE3915487A1 Radio receiver for MM range suitable for mobile military use - has structural and spatial alignment, identical reception modules in two spaced, vertical groups
11/14/1990EP0397386A2 Diversity receiver arrangement for digital signals
11/13/1990CA1276238C Satellite communications system for mobile users
11/12/1990CA2016486A1 Radio transmission system
11/07/1990EP0396015A1 Transponder with selective antenna beam using shared antennna feed elements
11/07/1990EP0395725A1 Pager having time controlled functions.
11/07/1990CN1046823A Digital radio communication system and two-way radio
11/06/1990US4968981 GPS receiver apparatus
11/06/1990US4968969 Device and method for data transmission and/or acquisition using two cross polarizations of an electromagnetic wave and magnetic recording device
11/06/1990CA1276045C Radio communication method and system
11/01/1990WO1990013186A1 Communication system employing multiple relay satellites operating on common downlink frequency
10/1990
10/31/1990EP0395239A1 Antenna beam forming system
10/31/1990EP0394339A1 Acknowledge back pager with adaptive variable transmitter output power
10/31/1990EP0394313A1 Paging terminal apparatus with message storage and retransmission capability and method therefor.
10/30/1990CA1275702C Method and apparatus for reducing handoff errors in a cellular radio telephone communications system
10/28/1990WO1990013212A1 Digital radio communication system and two way-radio
10/24/1990EP0393653A2 Radio telephone suitable for portable and vehicle-mounted use
10/24/1990EP0393646A2 Method of and apparatus for transmitting video data
10/24/1990EP0393122A1 Process and circuit arrangement for reversing frequency-modulated high-frequency signals
10/23/1990US4965851 Receiving arrangement with a reception carrier frequency alternately changed from one to another
10/23/1990US4965820 Cellular telephone apparatus
10/23/1990US4965809 Uplink cross-polarization interference canceller using correlation calculator and stepwise tracking controller
10/23/1990US4965587 Antenna which is electronically reconfigurable in transmission
10/18/1990WO1990012463A1 Spread spectrum-time diversity communications systems and transceivers for multidrop local area networks
10/18/1990WO1990012461A1 Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
10/18/1990WO1990012457A1 Frequency control apparatus and method for a digital radio receiver
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