| Patents for H04B 3 - Line transmission systems (31,523) |
|---|
| 02/06/1991 | EP0411741A1 Digital equalizer and FM receiver having same |
| 01/30/1991 | EP0409844A1 Amplifier arrangement and communication line circuit using same. |
| 01/30/1991 | CN1048960A Three-phrases power transmission line transmitting information apparatus |
| 01/30/1991 | CN1048959A Three-phrases power transmission line transmitting information apparatus |
| 01/30/1991 | CN1011461B Ensemble modem structure for imperfect transmission media |
| 01/29/1991 | US4989243 Use in a public telephone |
| 01/29/1991 | US4988972 Method for transmitting and receiving signals over transmission power lines |
| 01/29/1991 | US4988962 Circuit for correcting group delay at microwave frequencies |
| 01/29/1991 | CA1279710C Monitoring device for monitoring the operating states of telecommunications transmission devices |
| 01/26/1991 | WO1991001526A1 Digital filter and method of design |
| 01/23/1991 | EP0409171A2 Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property |
| 01/23/1991 | EP0408905A2 Optical fiber telecommunication line comprising amplifiers of the transmitted signals and amplifiers for said line |
| 01/23/1991 | EP0408580A1 Device for in-process monitoring of transmission systems. |
| 01/23/1991 | CN1048776A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048775A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048774A Ensemble modem structure for imperfect transmission media |
| 01/22/1991 | US4987569 Fast training echo canceller |
| 01/22/1991 | US4987378 Feedforward predistortion linearizer |
| 01/22/1991 | US4987298 Automatic gain control apparatus which adjusts bias and gain to maximize signal to noise ratio |
| 01/17/1991 | DE4021258A1 Field sensor communication system - uses digital techniques to collect data from sensors and transmit analog current values |
| 01/16/1991 | EP0407962A2 Adaptive echo canceller |
| 01/16/1991 | CN1048617A 场传感器通信系统 Field sensor communication system |
| 01/09/1991 | EP0407260A1 Gain matching apparatus for the reception of radio communication signals |
| 01/09/1991 | EP0407048A2 A dual channel A/D and D/A converter |
| 01/08/1991 | US4984265 Device for forming the hands-free function in a telephone set, associating the gain switching and echo suppression functions |
| 01/08/1991 | US4984250 DC termination circuit for subscriber cables |
| 01/08/1991 | US4984248 High speed transceiver |
| 01/08/1991 | CA1278751C Active attenuation system with increased dynamic range |
| 01/03/1991 | DE3921786A1 Non-contact power transmission between inductive stationary and moving - has transmission provided by transformer mounted on unit |
| 01/02/1991 | EP0405679A1 Autoadaptive equalization device for duobinary coded digital samples |
| 01/02/1991 | CN2068735U Supper thin integrated optical cable sensing-aid box |
| 01/01/1991 | US4982175 Telemetry circuit with noise immunization |
| 12/27/1990 | EP0404630A1 Device for receiving information supported by two capacitor-coupled lines, especially for vehicles |
| 12/27/1990 | EP0404237A2 Method and device for noise supression of a digital signal |
| 12/27/1990 | EP0403716A1 Echo cancelling device providing adjustment of the echo canceller coefficients during full-duplex transmission |
| 12/27/1990 | EP0230458A4 Patient identification and verification system and method |
| 12/27/1990 | CA1278351C Bidirectional analogue channel data transmission terminal with an echo canceller coupled to the receiving circuit |
| 12/27/1990 | CA1278347C Correlation detecting circuit operable in a low frequency |
| 12/26/1990 | CN1011015B Improved exteral circuit of automatic line |
| 12/25/1990 | US4980665 Remote control repeater |
| 12/19/1990 | EP0403247A2 AGC device for producing a gain controlled and d.c. offset removed signal |
| 12/19/1990 | EP0152423B1 Maintenance response signalling arrangement for a digital transmission system |
| 12/18/1990 | US4979218 Balanced output circuit |
| 12/18/1990 | US4979163 Echo suppression arrangement for an adaptive speakerphone |
| 12/18/1990 | CA1278060C Spread spectrum power line communications |
| 12/13/1990 | WO1990015495A1 Process for equalizing signals by means of test sequences |
| 12/13/1990 | WO1990015491A1 Data communication apparatus |
| 12/11/1990 | US4977591 Dual mode LMS nonlinear data echo canceller |
| 12/11/1990 | CA1277789C Method of controlling the electric power supplied to a modem |
| 12/05/1990 | EP0400979A2 Speakerphone with echo canceller-suppressor |
| 12/05/1990 | EP0400166A1 Method for localizing disturbances in a monitoring and/or control system |
| 12/05/1990 | EP0400001A1 Multipath reduction system |
| 12/05/1990 | CN2067047U Small iron wire plug with light-emitting alarm |
| 12/05/1990 | CN1010733B Adaptive blind equalization method and device |
| 12/04/1990 | US4975927 Demodulator with composite transversal equalizer and eye detection clock synchronizer |
| 12/04/1990 | US4975663 Frequency equalizer |
| 11/28/1990 | EP0399968A1 A method and arrangement for avoiding erroneous echoelimination and/or for avoiding erroneous equalization in a telecommunication system |
| 11/28/1990 | CN1010647B High-speed digital loop transceiver |
| 11/27/1990 | US4973954 Network user for maintaining data and energy transmission |
| 11/27/1990 | US4973940 Optimum impedance system for coupling transceiver to power line carrier network |
| 11/27/1990 | US4973794 Cable assembly for an electrical signal transmission system |
| 11/27/1990 | CA1277051C Methods of and system for providing substantially error-free transmitted data |
| 11/22/1990 | EP0398441A1 Adaptive discrete-time transversal filter |
| 11/22/1990 | EP0397912A1 Method and network arrangement for obtaining the output signals gradient of a given network for processing time discrete signals in relation to their network parameters |
| 11/22/1990 | CA2005359A1 Character/graphic information network system |
| 11/20/1990 | US4972467 Echo canceller |
| 11/20/1990 | US4972433 Receiver capable of improving signal-to-noise ratio in reproducing digital signal |
| 11/20/1990 | US4972432 Multiplexed synchronous/asynchronous data bus |
| 11/20/1990 | US4972406 Echo canceller |
| 11/20/1990 | CA1276693C Demodulator |
| 11/20/1990 | CA1276690C Pulse shaper |
| 11/15/1990 | WO1990013958A1 Receiver for quadraphase modulation signals |
| 11/15/1990 | WO1990013950A2 Power-line communication apparatus |
| 11/14/1990 | EP0397535A2 Modem |
| 11/14/1990 | EP0396727A1 Telephone circuits |
| 11/14/1990 | EP0396666A1 Selective active cancellation system for repetitive phenomena. |
| 11/13/1990 | US4970722 Broadband local area network |
| 11/13/1990 | US4970715 Modem with improved remote echo location and cancellation |
| 11/13/1990 | CA1276251C Gateway for use in load control system |
| 11/07/1990 | EP0396351A2 Balanced output circuit |
| 11/07/1990 | EP0396120A2 Procedure and apparatus for the protection of a data transmission network |
| 11/07/1990 | EP0395739A1 Process for controlling and/or monitoring and circuit arrangement for implementing the process. |
| 11/07/1990 | CN1046822A Method and equipment for cyclic transmission of multichannel analog signals |
| 11/06/1990 | US4969145 Modem |
| 11/06/1990 | US4969144 Data communications system |
| 11/06/1990 | US4968970 Method of and system for power line carrier communications |
| 11/02/1990 | CA2015875A1 Procedure and apparatus for the protection of a data transmission network |
| 11/01/1990 | WO1990013185A1 A method and arrangement for avoiding erroneous echo-elimination and/or equalization in a telecommunication system |
| 11/01/1990 | CA2015236A1 Balanced output circuit |
| 10/31/1990 | EP0395495A1 Adaptive network routing for power line communications |
| 10/31/1990 | EP0395494A2 Method of and system for power line carrier communications |
| 10/30/1990 | US4967302 Safety barriers for 2-wire transmitters |
| 10/30/1990 | CA1275710C Amplitude equalizer |
| 10/28/1990 | CA2015637A1 Power-line communication apparatus |
| 10/24/1990 | EP0394012A1 Termination circuit for a two-wire transmission line |
| 10/24/1990 | EP0393237A2 Communication link between moving bodies |
| 10/24/1990 | CN1010155B Circuit protector of communication line |
| 10/23/1990 | US4965823 Echo canceller |
| 10/23/1990 | US4965786 Echo canceller for a variable-phase echo signal |
| 10/23/1990 | US4964738 Electrical conductor of high magnetic permeability material for audio circuits |