Patents
Patents for H04B 17 - Monitoring; Testing (29,423)
01/1995
01/05/1995WO1995001011A1 Method and apparatus for testing telecommunications equipment using a reduced redundancy test signal
12/1994
12/22/1994WO1994029976A1 Method for testing a transceiver, and a base station of a time-divisional radiocommunication system
12/22/1994WO1994029975A1 Fading simulator
12/22/1994DE4319734A1 Arrangement for in-service monitoring of transmission paths in electrical communications systems
12/22/1994CA2164409A1 Fading simulator
12/21/1994EP0630125A2 Base station transceiver diagnostics equipment
12/14/1994EP0445232B1 Fiber optic link noise measurement and optimization system
12/14/1994CN1027026C Electric railway radio interfering property sine-measuring method
12/13/1994US5373548 Out-of-range warning system for cordless telephone
12/08/1994WO1994028638A1 Method for improving stored voice message quality
12/08/1994WO1994028637A1 A method and apparatus for determining signal usability
12/08/1994WO1994028623A1 A method and apparatus for mitigating distortion effects in the determination of signal usability
12/06/1994CA2053313C Rapid received signal strength indication
12/03/1994CA2122116A1 Alerting and monitoring services for communications systems
11/1994
11/30/1994EP0626765A1 Radio communication apparatus
11/29/1994US5369785 Method of and apparatus for detecting a monitoring signal at a base station in a radio telephone system
11/24/1994WO1994027385A1 Method and arrangement for measuring the condition of a base station
11/24/1994WO1994027367A1 Radio broadcast reception process and circuitry
11/23/1994EP0625863A2 Dual stage RSSI handoff trigger
11/23/1994CN1095534A Method and apparatus of estimating channel quality in a receiver
11/22/1994US5367395 Apparatus for detection and location of faults in two-way communication through single optical path
11/17/1994DE4316683A1 Method and circuit arrangement for broadcast reception
11/08/1994US5363402 HF radio apparatus operable in multiple communication modes
11/01/1994US5361402 Test device for analyzing communication channels in a trunked radio system
11/01/1994CA2021217C Radio communication apparatus having a function for displaying reception field strength and method of controlling the apparatus
10/1994
10/27/1994WO1994024576A1 Method and device for supervising the condition of an antenna
10/26/1994CN1094201A Method and apparatus for correcting a radio signal strength information signal
10/18/1994US5357557 Inter-mobile-terminal testing method in cellular automobile telephone system
10/12/1994EP0619687A1 Method and apparatus for determining the link quality in a mobile radio system
10/12/1994EP0619619A1 A coupling device
10/11/1994US5355530 Receiver using receiving condition signal for correcting influence of the reception band width
10/11/1994US5355519 Fading simulation method and fading simulator
10/11/1994US5355514 Method for determining the transmission quality of a home traffic connection in a mobile radio system
10/11/1994CA1332450C Carrier-to-noise detector for digital transmission systems
10/07/1994CA2120580A1 Method and device to ascertain the quality of service in a mobile radio installation
09/1994
09/29/1994WO1994022255A1 Self-diagnostic system for cellular-transceiver systems
09/28/1994EP0616742A1 Spatial division multiple access wireless communication systems
09/27/1994US5351245 In a digital radio communication system
09/20/1994US5349701 Method and apparatus for broken link detect using audio energy level
09/20/1994US5349497 Detachable handle structures for terminals
09/19/1994CA2115082A1 Low-loss rf coupler for testing a cellular telephone
09/07/1994CN1091875A Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals
09/06/1994US5345595 Apparatus and method for detecting fraudulent telecommunication activity
08/1994
08/24/1994EP0612162A2 Apparatus for monitoring the transmission power level in a TDMA communications system
08/10/1994EP0609436A1 A method for forming a quality measure for signal bursts
08/09/1994US5337316 Transceiver self-diagnostic testing apparatus and method
07/1994
07/27/1994EP0607693A2 Method and apparatus for diagnosing AMP to Speaker Connections
07/21/1994WO1994016530A1 Radio link parameter monitoring in a wireless communications system
07/21/1994WO1994016336A1 Method and arrangement for measuring the condition of a receiver antenna
07/21/1994WO1994016335A1 Arrangement for measuring the condition of a receiver antenna
07/20/1994EP0606916A1 Data transmission system using error correction without expansion of bandwidth
07/20/1994EP0606341A1 Method and apparatus for automatically identifying a program including a sound signal
07/20/1994EP0606330A1 Network with line monitoring system
07/12/1994US5329591 Transmitter identification and validation system and method
07/07/1994WO1994015420A1 Apparatus and method for fault detection on redundant signal lines via encryption
07/07/1994WO1994015413A1 Wireless personal local area network
07/07/1994CA2134559A1 Apparatus and method for fault detection on redundant signal lines via encryption
07/05/1994US5327359 Method and system for inferring the radio refractive index structure of the atmosphere from radio measurements
06/1994
06/22/1994EP0602722A2 Hold circuit, mobile station, base station and digital radio communication system comprising such a hold circuit
06/22/1994EP0602236A1 A method for controlling transmission power in a communication system
06/21/1994US5323421 Method and apparatus of estimating channel quality in a receiver
06/19/1994CA2085768A1 Hand model satellite receiver-setup apparatus
06/15/1994EP0601987A2 Method and apparatus for correcting a received signal strength indication in a radio receiver
06/15/1994EP0569440A4 Cell-site simulator for mobile communication systems
06/07/1994US5319804 Transmitter with nonlinearity correction circuits
06/07/1994US5319488 Terminal equipment and optical communication system using the same
06/01/1994EP0599679A1 Remote loopback system for radiocommunications transceiver
06/01/1994EP0599665A2 Detecting circuit and detection method
05/1994
05/31/1994US5317599 Method and circuit for detecting CN ratio of QPSK signal
05/31/1994US5317278 Switched active fault locate filter
05/26/1994WO1994011989A1 Method and apparatus for encoding/decoding broadcast or recorded segments and monitoring audience exposure thereto
05/26/1994WO1994011959A1 An apparatus and method for detecting potentially fraudulent telecommunication activity
05/26/1994DE4236386C1 Monitoring FM radio transmitter - detecting mean power level of modulation multiplex signal to prevent over-modulation
05/18/1994CN1086944A A method for controlling transmission power in a communication system
05/17/1994US5313657 Receiver capable of reliably detecting a failure
05/11/1994WO1994010774A1 Radio frequency communication network having adaptive communication parameters
05/11/1994CA2148381A1 Radio frequency communication network having adaptive communication parameters
05/05/1994DE4235453A1 Verfahren zur Signalklassifizierung bei FDM-Funkübertragungssystemen Method for signal classification in FDM radio transmission systems
05/03/1994US5309477 Measurement of receiver sensitivity of a radio communication apparatus by radio and optical test signals
04/1994
04/28/1994WO1994009584A1 Method of determining an idle channel in fdm radio transmission systems
04/28/1994DE4235915A1 Generating multipath reception interference simulation test signal - sampling and digitising analog FM HF signal by A=D converter to test radio receiver
04/26/1994US5307409 Apparatus and method for fault detection on redundant signal lines via encryption
04/19/1994US5305181 Arm or wrist mounted terminal with a flexible housing
04/19/1994CA2006293C Non-intrusive transmission channel diagnostic device for a digital modem applied to a regenerative demodulator
04/14/1994WO1994008402A1 Method and apparatus of estimating channel quality in a receiver
04/14/1994DE4234052A1 Measurement of damping of stray radio field measurement position - using known antenna factors and coupling correction factor determined by manufacturer at reference measurement position
04/13/1994EP0592041A1 Transmission system for a main signal and an auxiliary signal
04/13/1994CN1085367A A method for forming a quality measure for signal bursts
04/12/1994US5303262 Method and apparatus for triggering measurements from a TDMA signal
04/07/1994DE4233222A1 Channel sounder measuring mobile radio channels - uses special, optimum test signal with several spectral lines having slight crest factor
04/06/1994EP0590252A1 Mobile radio systems
03/1994
03/31/1994CA2100816A1 Mobile radio systems
03/30/1994EP0589595A2 Method and apparatus for detecting a supervisory audio tone
03/29/1994US5299228 Method and apparatus of reducing power consumption in a CDMA communication unit
03/23/1994EP0588662A1 CN ratio measuring apparatus
03/22/1994CA2101501A1 Method and apparatus for detecting a supervisory audio tone
03/21/1994EP0586548A4 Radio frequency error detection and correction system.
03/17/1994WO1994006227A1 A spectrum sharing communications system
03/16/1994EP0586548A1 Radio frequency error detection and correction system.
03/03/1994WO1994005119A1 Device for remote testing and maintenance of cable networks