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)
10/1991
10/01/1991US5053782 Commercial satellite communications system
10/01/1991CA1290021C Trunked radio repeater system
09/1991
09/25/1991EP0448015A2 Mobile radio communication system
09/25/1991EP0327541B1 System for automated communication for data transmission
09/25/1991EP0327540B1 Control system for data carriers
09/25/1991EP0267280A4 Interactive television and data transmission system
09/25/1991EP0210181B1 Dispatch trunked radio system
09/25/1991CN1054875A Shared-carrier frequency hopping
09/25/1991CN1054873A Simulative interference video signals generator
09/24/1991US5052024 Offset frequency multipoint modem and communications network
09/24/1991US5051993 Mixed modulation level communication system
09/24/1991US5051989 Switching arrangement capable of switching burst time plan tables/channel assignment pattern tables of a specific terrestrial station
09/24/1991CA1289684C Method of adjusting the interstation delay in an information transmission system comprising a large number of relay stations arranged in cascade and utilizing in one transmission direction the tdma method, and a system to which such a delay adjusting method is applied
09/24/1991CA1289625C Receiving arrangement with a reception carrier frequency alternately changed from one to another
09/24/1991CA1289622C Code division multiplexed acknowledge back paging system
09/20/1991WO1991015071A1 Integrated cellular communications system
09/20/1991WO1991015061A1 A method for synchronizing the transmissions in a simulcast transmission system
09/19/1991WO1991014314A1 Process for the mobile reception of digital signals
09/19/1991WO1991014244A1 Communications system
09/19/1991DE4008502A1 Verfahren zum mobilen empfang von digitalen signalen A method for mobile reception of digital signals
09/18/1991EP0446610A1 Magnified phased array with a digital beamforming network
09/18/1991EP0446248A1 Power conservation method and apparatus for a portion of a synchronous information signal.
09/18/1991CN1054693A Continous cipher synchronization for cellular communication system
09/17/1991CA1289207C Microwave absorber attenuator for linear sspa power control
09/17/1991CA1289195C Frequency translation correction scheme satellite communication system
09/15/1991CA2038278A1 Receiver
09/11/1991EP0446194A1 Continous cipher synchronization for cellular communication system
09/11/1991EP0445887A2 Method of optimising the transmission of idle beacon messages in a communications system and a communications system operable in accordance with the method
09/11/1991EP0445885A1 Receiver with means for acquisition and comparison of identification data of two transmission channels
09/11/1991EP0401221B1 Reception process and reception antenna system for implementing the process
09/11/1991EP0209527B1 Method of communications between register-modelled radio devices
09/11/1991EP0207948B1 Internally register-modelled, serially-bussed radio system
09/11/1991CN1054513A Ceiling mount microwave transceiver with 360 degree radiation pattern
09/10/1991US5048117 Radio telephone apparatus
09/10/1991US5048116 Signal routing system
09/10/1991US5048057 Wireless local area network
09/10/1991US5047859 Method and apparatus for communication channel identification and signal restoration
09/10/1991CA2037830A1 Microwave communications installation
09/10/1991CA1288823C Initialization of communication channel between a subscriber station and a base station in a subscriber communication system
09/10/1991CA1288821C Cellular radio telephone enhancement circuit
09/08/1991WO1991014315A1 Continuous cipher synchronization for cellular communication system
09/05/1991WO1991013501A1 Frame synchronizing method for digital mobile radio
09/05/1991WO1991013420A2 Vehicle-pedestrian communication system
09/05/1991WO1991013414A1 Ceiling mount microwave transceiver with 360 degree radiation pattern
09/04/1991EP0445010A1 Geostationary observation satellite with liquid propellant apogee maneuvering system and hollow antennae
09/04/1991EP0444929A2 Power source control system for automobile telephone
09/04/1991EP0444841A2 Time-allocation of radio carriers
09/04/1991EP0444679A2 Mobile antenna
09/04/1991EP0444592A2 Multidirection multiplex communication system
09/04/1991EP0444485A2 Cellular TDM communication system employing offset frame synchronization
09/04/1991EP0444357A2 Ceiling mount microwave transceiver with 360 degree radiation pattern
09/04/1991EP0444322A2 Car radio with digital equalizer
09/04/1991EP0360803A4 Portable communications receiver with separate information presentation means and improved battery saving function
09/03/1991US5046187 Method and apparatus for notifying completion of data communication for mobile radio telephone
09/03/1991US5046129 Reducing phase error in received FM multiplex signal
09/03/1991US5046128 Frequency equalized simulcast broadcasting system and method
09/03/1991US5046124 Frequency modulated radio frequency broadcast network employing a synchronous frequency modulated booster system
09/03/1991CA1288480C Satellite communications system employing frequency reuse
09/02/1991CA2033488A1 Ceiling mount microwave transceiver with 360 degree radiation pattern
09/01/1991CA2011214A1 Secur-alarm
08/1991
08/28/1991WO1991013502A1 Shared-carrier frequency-hopping
08/28/1991EP0443997A1 A method of reducing the influence of fading of a Viterbi-receiver having at least two antennas
08/28/1991EP0443786A2 Multiple-beam energy transmission system
08/28/1991EP0443333A1 Cross-polarization interference canceller
08/28/1991EP0443187A2 Radio data transmission system for vehicule as well as radio transmitter-receiver of a motor vehicle automobile
08/28/1991CN1054156A Method of reducing influence of fading of viterbi receiver having at least two antennas
08/27/1991US5043737 Precision satellite tracking system
08/27/1991US5043736 Cellular position locating system
08/27/1991US5043721 Paging accessory for portable information/computing devices
08/27/1991CA2037008A1 Geostationary earth observation satellite incorporating liquid propellant apogee maneuver system and hollow antennas
08/27/1991CA1288180C Tdma system capable of individually controlling electric power of bursts
08/22/1991DE4005397A1 Car radio data transmission system - has transmission channels allocated to preset geographic directions of car travel
08/21/1991WO1991013508A1 A method for active feedback suppression
08/21/1991WO1991013419A2 Method and device for rationalizing private journeys
08/21/1991EP0442797A1 Circuit for switching a microwave output signal towards a first or a second output port
08/21/1991EP0442617A1 Apparatus and method for expanding cellular system capacity
08/21/1991EP0441944A1 Cellular rediotelephone communications system, and method of allocating communication channels for such a system
08/21/1991EP0190166B1 Rf amplifier with frequency spectrum control
08/21/1991CN2083361U Automatic relay translator of simplex wireless telephone set
08/21/1991CA2053915A1 Method and device for rationalizing private journeys
08/20/1991US5042083 Radio communication system having means for avoiding signal collision
08/20/1991US5042082 Mobile assisted handoff
08/20/1991US5041834 Artificial ionospheric mirror composed of a plasma layer which can be tilted
08/20/1991US5041833 Precise satellite ranging and timing system using pseudo-noise bandwidth synthesis
08/20/1991CA1287897C Multipoint data communication with a supervisory system for detecting a malfunctioning remote station
08/17/1991CA2036130A1 Circuit for surtching a microwave signal to one of two outputs
08/15/1991WO1991012698A1 Radio having removable memory means for storing radio user validation code
08/14/1991DE4003820A1 Wireless digital telephone system base station emulator - initiates synchronisation for assigning time slots to subscriber station within frame pattern of signal using positive edges
08/14/1991CN1053870A Method and apparatus for controlling transmission power in cdma cellular mobile telephone system
08/13/1991US5040237 Method and apparatus for an alternate home channel for a land mobile transmission trunked communication system
08/13/1991US5040205 Multi-channel cordless telephone system with a plurality of handset units and base units
08/13/1991US5040189 Multiple frequency radio system employing pulse repeaters
08/08/1991WO1991011830A1 Antenna combination
08/08/1991DE4003385A1 Road vehicle aerial system
08/07/1991EP0440431A2 Power source control circuitry for an automotive portable telephone
08/07/1991EP0440284A2 A system for the transmission of data packets
08/07/1991EP0440239A2 Antenna selection diversity reception apparatus
08/07/1991EP0440186A1 Signal control apparatus capable of readily changing an apparatus output signal
08/07/1991EP0439939A2 Radio network with switching arrangement for coupling radios to a selected antenna out of a plurality of antennas
08/07/1991EP0439925A2 Maximum likelihood decoding with interference detection for frequency-hopped coded modulation systems
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