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)
12/1989
12/21/1989DE3820633A1 Radio network
12/20/1989EP0347234A2 Communication systems
12/20/1989EP0346925A2 Private branch radio communication system using optical fibers
12/20/1989EP0346868A2 Time shared power amplifier
12/20/1989CN1038170A Single antenna, multipolarization, frequency modulated continuous-wave radar
12/19/1989US4888769 TDMA terminal controller
12/14/1989WO1989012362A1 Frequency synthesizer with spur compensation
12/13/1989EP0345843A2 Reception method and receiving antenna system for mobile reception
12/12/1989US4887296 Cryptographic system for direct broadcast satellite system
12/12/1989US4887266 Communication system
12/12/1989US4887265 Packet-switched cellular telephone system
12/12/1989US4887050 Frequency control apparatus and method for a digital radio receiver
12/12/1989CA1263900A1 Subscriber unit for wireless digital telephone system
12/06/1989EP0344833A1 Reception method and reception antenna system for mobile reception
12/06/1989EP0344679A2 Receiving arrangement with a reception carrier frequency alternately changed from one to another
12/06/1989EP0344539A2 Control technique for an rf communication system
12/06/1989EP0344509A2 Frequency synthesizer with spur compensation
12/06/1989EP0344149A1 System for over-the-air reprogramming of communication receivers.
12/06/1989EP0192730B1 Transmission of information by directed bundles of rays of electromagnetic waves having a maximum wavelength of 10mm
12/06/1989CN2049054U Automatic monitor for radio communication dispatching
12/05/1989US4885798 Power consumption control apparatus
11/1989
11/30/1989WO1989011769A1 Communication system having a packet structure field
11/30/1989WO1989011701A1 Interrogation and remote control device; process for operating and using said device
11/30/1989DE3903262A1 Receiving system for a satellite broadcasting system
11/30/1989DE3817621A1 Remote control system with a battery-fed or accumulator-fed remote control unit
11/29/1989EP0343538A2 Diversity receiver
11/29/1989EP0343189A1 Tdma communications system with adaptive equalization.
11/29/1989EP0343156A1 Multiple frequency radio system employing pulse repeaters
11/23/1989EP0343034A1 Radio system for data transmission with a passive terminal station
11/23/1989EP0342858A2 System for re-emitting electromagnetic waves received from outside within an electromagnetic shielded space
11/21/1989US4882765 Data transmission system
11/21/1989US4882730 TDMA communication system having common time slots for system maintenance
11/21/1989US4882588 Steerable beam antenna system using butler matrix
11/21/1989US4882579 Code division multiplexed acknowledge back paging system
11/21/1989CA1263197A1 Portable handsets telephone communication system
11/16/1989WO1989011185A1 Reception process and antenna system for mobile reception
11/16/1989WO1989011184A1 Reception process and antenna system for mobile reception
11/16/1989WO1989011126A1 A method and arrangement for channel monitor and control
11/15/1989EP0341881A2 Multichannel radio communication system
11/15/1989EP0341238A1 Automatic antenna tuning system for portable communication devices.
11/14/1989US4881240 AM equalizer circuit for digital systems
11/08/1989EP0340912A2 Radio communication apparatus
11/08/1989EP0340794A2 Portable apparatus with variable rating battery charger for recharging interchangeable battery packs
11/08/1989EP0188554B1 Cellular voice and data radiotelephone system
11/07/1989US4879713 Satellite-based vehicle communication/position determination system
11/07/1989US4879711 Satellite communications system employing frequency reuse
11/07/1989CA1262756A1 Control system of a radio telephone apparatus
11/07/1989CA1262755A1 Radio telephone system control apparatus and method
11/02/1989WO1989010669A1 Multiple-access communications system
11/02/1989WO1989010668A1 Multiple access communications system
11/02/1989WO1989010660A1 Mobile radio systems
11/02/1989WO1989010659A1 Detachable battery pack with a built-in broadband antenna
11/02/1989WO1989010626A1 A ground-to-air telephone calling system and related method
11/02/1989EP0339628A2 Detachable battery pack with a built-in broadband antenna
10/1989
10/31/1989US4878252 Modified multi-path detector
10/31/1989CA1262562A1 Portable radio
10/25/1989EP0338834A2 Mobile telephone terminal having function to perform call clear process
10/25/1989EP0338765A2 Radio communication system for data transmission and reception
10/25/1989CN1036668A Antenna which is electronically reconfigurable in transmission
10/24/1989US4876743 Signal diversity arrangement for mobile reception
10/24/1989US4876740 Radiotelephone system employing digitized speech/data signalling
10/24/1989US4876737 Satellite data transmission and receiving station
10/24/1989US4876708 Cordless telephone system
10/18/1989EP0337269A2 Method and arrangement for reducing frequency-deviations in a mobile satellite communication
10/18/1989EP0337267A2 Method and arrangement for reducing frequency-deviations in a mobile satellite communication
10/18/1989CN2046298U Ultrasonic remote control device of ceiling fan
10/17/1989US4875231 Radio telephone system
10/17/1989CA1262385A1 Pager watch system utilizing time slot communication
10/17/1989CA1262382A1 Station relief arrangement for use in relieving operation of a reference station in a tdma network without reduction of frame availability
10/11/1989EP0335931A1 Shopping cart display system
10/10/1989US4873683 TDMA radio system employing BPSK synchronization for QPSK signals subject to random phase variation and multipath fading
10/10/1989CA1262262A1 Education utility
10/04/1989EP0335846A1 Cellular digital mobile radio system with plural base station transmitters, and method of transmitting information in such a system
10/04/1989EP0334867A1 Duplex data transmission.
10/03/1989US4872205 Radio communication system having autonomously selected transmission frequencies
10/03/1989US4872182 Frequency management system for use in multistation H.F. communication network
10/03/1989US4872164 Method and arrangement for compensating shifts in delay produced by the doppler effect in bursts in a TDMA frame
10/03/1989US4872015 Satellite communications system for mobile users
09/1989
09/27/1989EP0334587A2 Signal processing system
09/27/1989EP0333848A1 A current switching arrangement
09/26/1989US4870698 Output power control circuit for a mobile radio apparatus
09/26/1989US4870642 Demand-assignment communication system
09/26/1989US4870408 Method for dynamically allocating data channels on a trunked communication system
09/26/1989CA1261980A1 Signal processing system
09/26/1989CA1261396A1 Mobile radio unit in cellular wide range mobile communication system
09/26/1989CA1261395A1 Method for dynamically regrouping subscribers on a communications system
09/26/1989CA1261080A1 Satellite communications system with random multiple access and time slot reservation
09/26/1989CA1260636A1 Watch pager system and communication protocol
09/26/1989CA1260635A1 Synchronization burst transmit phase control system
09/26/1989CA1260546A1 Abduction-preventing collar
09/26/1989CA1260101A1 Self-adaptive hybrid data transmission
09/26/1989CA1260067A1 Mobile radio communication system with repeater station grid
09/26/1989CA1260066A2 Unit for preventing an interception of a radio communication signal transmitted between a fixed facility and a mobile station
09/20/1989EP0333679A1 Method of transmitting data information in a mobile, cellular radio communication system
09/20/1989EP0333167A1 Receiver for a space diversity radio transmission system comprising a diversity combiner
09/20/1989EP0333166A1 Electronically reconformable transmitting antenna
09/20/1989EP0333042A1 Receiver for a space diversity radio transmission system
09/20/1989EP0332818A2 Cellular telephone system with shared radio data channels
09/19/1989US4868890 Diversity combiner
09/19/1989US4868886 Combined global/spot beam configuration for satellite communications
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