| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 04/05/1994 | US5301210 Coherent demodulating device with carrier wave recovering digital circuit |
| 04/05/1994 | US5301209 Multidimensional trellis-coded modulation for fading channels |
| 04/05/1994 | US5300904 Circuit arrangement for the tank circuit of a high-frequency transmitter output stage operated with frequency shift keying |
| 04/05/1994 | CA2025827C Carrier lock detector for a qam system |
| 04/05/1994 | CA2025164C Adaptive phase lock loop system |
| 03/31/1994 | WO1994007314A1 Method for synchronising transmitter frequencies in common wave digital audio broadcast |
| 03/31/1994 | DE4232922A1 Data transmission network for process system - uses bidirectional bus coupler between each field device and data bus leading to operating device |
| 03/30/1994 | EP0589709A2 Multiresolution transmission system |
| 03/30/1994 | EP0589390A1 Receiver for phase shift modulated carrier signals |
| 03/30/1994 | EP0589164A1 Data slicer with hold |
| 03/30/1994 | EP0386029B1 Demodulation method |
| 03/29/1994 | US5299233 Apparatus and method for attenuating a received signal in response to presence of noise |
| 03/29/1994 | US5299232 Phase compensation method and apparatus |
| 03/29/1994 | US5299231 Method and device for estimating the carrier frequency of a modulated data signal |
| 03/29/1994 | US5299192 Digital filter-type frequency demultiplexing device |
| 03/29/1994 | US5298897 Method and apparatus for decoding two frequency (f/sf) data signals |
| 03/29/1994 | CA2021361C Quadrature demodulation of a data sequence following a particular signal sequence with a local reference carrier signal having a frequency different from a received carrier signal |
| 03/23/1994 | EP0588741A1 System for broadcasting digital signals with active time diversity and corresponding transmitter and receiver |
| 03/23/1994 | EP0588542A2 Multiple QAM digital television signal encoder |
| 03/23/1994 | EP0588444A1 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 03/23/1994 | EP0588387A2 D/A converter capable of producing an analog signal having levels of a preselected number different from 2**N and communication network comprising the D/A converter |
| 03/23/1994 | EP0588151A1 Optical heterodyne receiver for the reception of optical DPSK signals |
| 03/23/1994 | EP0587641A1 Tdma communication using carrier frequency offset compensation |
| 03/23/1994 | EP0587620A1 Radio system |
| 03/22/1994 | US5296820 Coherent demodulator preceded by non-coherent demodulator and automatic frequency control circuit |
| 03/17/1994 | WO1994006233A1 Combined equalizer and roll-off filter |
| 03/17/1994 | WO1994006231A1 Digital signal transmission system using frequency division multiplex |
| 03/16/1994 | EP0586554A1 Binary data error correction using hint signal |
| 03/15/1994 | US5295162 Digital demodulator which quantizes signal components according to different thresholds |
| 03/15/1994 | US5295160 Apparatus for FM-modulation of digital signals |
| 03/15/1994 | US5295159 Coordinated coding for digital transmission |
| 03/15/1994 | US5295156 Modem |
| 03/15/1994 | US5295151 Transition detection circuit for PSK signals using the SAW Chirp-Z algorithm (U) |
| 03/09/1994 | EP0585427A1 Method and apparatus for estimating signal weighting parameters in a receiver |
| 03/08/1994 | US5293633 Apparatus and method for providing digital audio in the cable television band |
| 03/08/1994 | US5293408 FSK data receiving system |
| 03/08/1994 | US5293407 Digital modulator with digital power control circuit |
| 03/08/1994 | US5293406 Quadrature amplitude modulator with distortion compensation |
| 03/08/1994 | US5293401 Equalizer for linear modulated signal |
| 03/02/1994 | EP0585089A2 Digital block processor for transmitting a plurality of channels in a wireless radiotelephony system |
| 03/02/1994 | EP0584996A1 FSK modulating apparatus |
| 03/02/1994 | EP0584918A1 Method of detecting the disconnection of a transmission line |
| 03/02/1994 | EP0584872A1 Phase modulator using look-up tables |
| 03/02/1994 | EP0584865A1 Coding for a multilevel transmission system |
| 03/02/1994 | EP0584724A2 Parallel transmission of TDMA sync and data bursts by artificial frequency selective fade and decision feedback equalization |
| 03/02/1994 | EP0584534A1 Method and apparatus for reducing the peak power of data sequences |
| 03/02/1994 | EP0584248A1 Dual mode transmitter and receiver |
| 03/02/1994 | EP0584241A1 Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
| 03/02/1994 | CN1083291A Modulator test system |
| 03/01/1994 | US5291555 Communication using synchronized chaotic systems |
| 03/01/1994 | US5291527 Communication system and demodulator used in communication system |
| 03/01/1994 | US5291525 Symmetrically balanced phase and amplitude base band processor for a quadrature receiver |
| 03/01/1994 | US5291523 Viterbi receiver with improved timing means |
| 03/01/1994 | US5291521 Index assignment in redundancy-coded data communication systems |
| 03/01/1994 | US5291520 Methods and apparatus employing distribution preserving Tomlinson precoding in transmission of digital data signals |
| 03/01/1994 | US5291516 Dual mode transmitter and receiver |
| 03/01/1994 | US5291499 Method and apparatus for reduced-complexity viterbi-type sequence detectors |
| 03/01/1994 | US5291289 Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation |
| 03/01/1994 | US5291154 Synchronous single cycle sample and control amplitude modulator |
| 03/01/1994 | US5291081 Apparatus for detection of non-modulated signal and frequency acquisition |
| 02/27/1994 | CA2100043A1 Digital block processor for transmitting a plurality of channels in a wireless radiotelephony system |
| 02/24/1994 | DE4227097A1 Amplitude modulation circuit for laser drive signal - has first and third voltage-controlled current sources connected to first differential amplifier, and second current source connected to second |
| 02/23/1994 | EP0583967A2 Decoding using a linear metric and interference estimation |
| 02/23/1994 | EP0583890A2 Apparatus for time division multiplexed processing of frequency division multiplexed signals |
| 02/23/1994 | EP0583643A1 Wholly-digital demodulation system for QAM signalling in low capacity links |
| 02/23/1994 | CN1082799A Apparatus for time division multiplexed processing of frequency division multiplexed signals |
| 02/22/1994 | US5289506 Automatic frequency control circuit |
| 02/22/1994 | US5289505 Frequency translation apparatus and method |
| 02/22/1994 | US5289503 Method and circuit arrangement for producing a QPSK signal on which a carrier signal is superposed |
| 02/22/1994 | US5289501 Coded modulation with unequal error protection for fading channels |
| 02/22/1994 | US5289500 Signal conditioner |
| 02/22/1994 | US5289476 Transmission mode detection in a modulated communication system |
| 02/22/1994 | US5289459 Duplex data transmission |
| 02/17/1994 | WO1994003989A1 Spread spectrum communication system particularly suited for rf network communication |
| 02/17/1994 | WO1993003560A1 Generating signals |
| 02/17/1994 | CA2139227A1 Spread spectrum communication system particularly suited for rf network communication |
| 02/16/1994 | EP0583059A1 Adaptive signal modulation system |
| 02/16/1994 | EP0582754A1 Mobile communication system with linear digital modulation means |
| 02/16/1994 | EP0346449B1 A variable frequency rate receiver |
| 02/15/1994 | US5287516 Demodulation process for binary data |
| 02/15/1994 | US5287387 Low splatter peak-to-average signal reduction |
| 02/15/1994 | US5287374 Identification of encoder type through observation of data received |
| 02/15/1994 | US5287197 Signal demodulation device |
| 02/15/1994 | US5287067 Method and apparatus for demodulation with adaptive phase control in quasi-coherent detection |
| 02/09/1994 | EP0581799A1 Adaptive phase control for a power amplifier predistorter. |
| 02/08/1994 | US5285479 Quadrature modulation circuit |
| 02/08/1994 | US5285474 Method for equalizing a multicarrier signal in a multicarrier communication system |
| 02/08/1994 | US5285473 System to generate switching criteria and equalize adaptively in data spectrum |
| 02/08/1994 | US5285458 System for suppressing spread of error generated in differential coding |
| 02/02/1994 | EP0581522A1 Fir filter apparatus for processing of time division multiplexed signals |
| 02/02/1994 | EP0580990A1 Optical transmitter for digital signals |
| 02/02/1994 | CN1081551A Fsk receiver |
| 02/02/1994 | CN1081550A Modem including an equalizer for amplitude jitter |
| 02/01/1994 | US5283815 Tangental type differential detector for pulse shaped PI/4 shifted differentially encoded quadrature phase shift keying |
| 02/01/1994 | US5283780 Digital audio broadcasting system |
| 02/01/1994 | US5283531 Demodulation apparatus incorporating adaptive equalizer for digital communication |
| 02/01/1994 | CA2009468C Frequency control apparatus and method for a digital radio receiver |
| 01/31/1994 | CA2101592A1 Frequency stabilizing circuit for a /4 shift qpsk signal receiver |
| 01/27/1994 | DE4240851C1 Frequency modulated signal demodulator - uses phase locked loop used for demodulation of additionally receivable difference-coded quadrature-phase shift keyed signals |
| 01/26/1994 | EP0580482A1 Digital receive-filter |