| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 08/06/1985 | US4534040 Method and apparatus for coding a binary signal |
| 08/06/1985 | US4534026 Normalized error compensator for modems using radial amplitude modulation for multiplexing |
| 08/06/1985 | US4533874 Digital FSK demodulator using non-recursive transversal filter |
| 07/30/1985 | US4532640 Phase tracking loop for digital modem |
| 07/30/1985 | CA1191206A1 Full duplex modems and synchronizing methods and apparatus therefor |
| 07/24/1985 | EP0149546A2 Receiver for power line communication systems |
| 07/24/1985 | EP0149152A2 Circuit arrangement for a digital level control |
| 07/24/1985 | EP0148906A1 Digital modem with plural microprocessors |
| 07/23/1985 | US4531224 Low signal-to-noise ratio symbol synchronizer |
| 07/23/1985 | US4531221 Premodulation filter for generating a generalized tamed frequency modulated signal |
| 07/18/1985 | WO1985003180A1 Packetized ensemble modem |
| 07/16/1985 | US4530104 Circuit for reducing errors in a data receiver |
| 07/16/1985 | US4529950 Digital phase and amplitude modulator |
| 07/16/1985 | US4529941 FSK Demodulator utilizing multiple-phase reference frequencies |
| 07/16/1985 | CA1190610A1 Energy synchronized demodulator circuit |
| 07/10/1985 | EP0147414A1 Method for the non-coherent demodulation of a constant symbol powered, linearly modulated signal and demodulator for implementing such method. |
| 07/09/1985 | US4528675 FSK modem for bidirectional loop communications system |
| 07/09/1985 | US4528519 Automatic gain control |
| 07/09/1985 | US4528513 Digital FM ratio detector with gain-controlled filter |
| 07/09/1985 | US4528512 Timing synchronizing circuit for demodulators |
| 07/09/1985 | US4528511 Circuit for digital FM demodulation |
| 07/04/1985 | WO1985002966A1 A phase shift keying and phase modulation transmission system |
| 07/04/1985 | WO1985002959A1 A digital communications system |
| 07/03/1985 | EP0147120A2 A zero if demodulator and method of demodulation |
| 07/03/1985 | EP0147008A2 Bilateral digital FSK communication system interface using digital technique |
| 07/03/1985 | EP0146652A1 A digital demodulator for digitized frequency-modulated signals |
| 07/02/1985 | US4527278 Method for correcting the frequency of a local carrier in a receiver of a data transmission system and receiver using this method |
| 07/02/1985 | US4527275 Correlation data communications system |
| 07/02/1985 | CA1189912A1 Receiver for angle-modulated carrier signals |
| 07/02/1985 | CA1189911A1 Carrier data operated squelch |
| 07/02/1985 | CA1189910A1 Bit data operated squelch |
| 06/26/1985 | EP0146045A2 Digital data transceiver for power line communications system |
| 06/26/1985 | EP0145972A1 Coherent optical communication system with FSK heterodyne or homodyne detection and little influence by distortion of a modulated optical signal |
| 06/26/1985 | EP0070287B1 High frequency communications |
| 06/25/1985 | US4525847 QAM encoder |
| 06/25/1985 | US4525846 Modem in-band secondary channel via radial modulation |
| 06/25/1985 | US4525835 Duplex radio system utilizing time compression expansion |
| 06/25/1985 | US4525676 PSK Demodulation system having carrier frequency variation compensation |
| 06/25/1985 | CA1189582A1 Switched-capacitor modulator for quadrature modulation |
| 06/19/1985 | EP0145605A2 Analog signal verification circuit |
| 06/19/1985 | EP0145330A2 Signal structure for data communication |
| 06/19/1985 | EP0145101A2 Carrier detection circuit |
| 06/12/1985 | EP0144245A2 Transmitter/receiver system |
| 06/12/1985 | EP0144083A2 Radio communication system |
| 06/11/1985 | US4523324 Direct modulation FM data receiver |
| 06/11/1985 | US4523323 Digital signal communication system for multi-level modulation including unique encoder and decoder |
| 06/11/1985 | US4523158 Clock regenerator using two on-off oscillators |
| 06/11/1985 | CA1188759A1 Multi-phase digital signal modulation method |
| 06/11/1985 | CA1188758A1 Electronic arrangement for generating an amplitude and phase-modulated carrier signal |
| 06/11/1985 | CA1188757A1 Digital coherent psk demodulator and detector |
| 06/11/1985 | CA1188741A1 Method of determining optimum sampling times for quadrature phase shift keyed or quadrature amplitude modulated signals |
| 06/06/1985 | WO1985002509A1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission |
| 06/05/1985 | EP0143539A2 Digital demodulator arrangement for quadrature signals |
| 06/05/1985 | EP0143469A2 Receiver unit in radio communication system |
| 06/04/1985 | US4521892 Direct conversion radio receiver for FM signals |
| 06/04/1985 | US4521878 Data transmitting-receiving system |
| 06/04/1985 | US4521647 Tone detection system and method |
| 06/04/1985 | CA1188369A1 Method and apparatus for receiving a data signal modulated by means of a double sideband-quadrature carrier modulation technique |
| 05/29/1985 | EP0142847A2 Digital signal generating device |
| 05/28/1985 | US4520493 Adaptive recursive frequency offset tracking system |
| 05/28/1985 | US4520492 Method for determining the optimum sampling times for a QPSK or QAM received signal |
| 05/28/1985 | US4520490 Differentially nonlinear convolutional channel coding with expanded set of signalling alphabets |
| 05/28/1985 | CA1188015A1 Tone detector and multifrequency receiver using said detector |
| 05/28/1985 | CA1187944A1 Spectrum surveillance receiver system |
| 05/28/1985 | CA1187943A1 Digital transmitter with vector component addressing |
| 05/22/1985 | EP0142427A2 Digital data transmission system using a coherent light wave modulation |
| 05/22/1985 | EP0142302A2 Programmable multiple type data modem |
| 05/21/1985 | US4519084 Matched filter for combating multipath fading |
| 05/21/1985 | US4519083 Bilateral digital data transmission system |
| 05/21/1985 | US4518922 Decision-directed, automatic frequency control technique for non-coherently demodulated M-ARY frequency shift keying |
| 05/15/1985 | EP0141466A2 Sampled costas loop |
| 05/15/1985 | EP0141422A2 Frequency detector |
| 05/14/1985 | US4517680 Error vector normalizer |
| 05/14/1985 | US4517519 FSK Demodulator employing a switched capacitor filter and period counters |
| 05/14/1985 | CA1187218A1 Signal burst signal transmission system |
| 05/09/1985 | WO1985002079A1 Carrier-phase adjustment using absolute phase detector |
| 05/08/1985 | EP0140753A1 Method and apparatus for the coherent demodulation of a digitally modulated carrier |
| 05/08/1985 | EP0140440A2 Data Receiver |
| 05/08/1985 | EP0140169A1 Zero IF frequency modulator |
| 05/07/1985 | US4516249 Railway signalling receiver |
| 05/07/1985 | US4516087 Method for reducing side-lobe energy in an MSK detectable signal |
| 05/07/1985 | US4516079 Coherent phase shift keyed demodulator for power line communication systems |
| 05/02/1985 | EP0139594A1 Method and apparatus for the detection of a transition of the direct current component of a periodic signal, in particular for subscriber loop interface circuits |
| 05/02/1985 | EP0139514A2 Digital radio receiving apparatus |
| 05/02/1985 | EP0139461A2 Improvements relating to optical receivers |
| 05/02/1985 | EP0139033A1 Digital direct RF-modulation method and circuit arrangement for carrying out said method |
| 05/02/1985 | EP0138988A1 Simultaneous transmission of speech and data over an analog channel. |
| 04/30/1985 | US4514855 Means and method for reduction of phase jitter |
| 04/30/1985 | US4514825 For communication of digital data over a communications channel |
| 04/30/1985 | US4514697 Coherent phase shift keyed demodulator with improved sampling apparatus and method |
| 04/30/1985 | CA1186427A1 Fm-broadcasting system with transmitter identification by means of a binary phase-modulated, differentially coded code signal |
| 04/24/1985 | EP0138727A2 Receiving circuit for a wave modulated at one time in frequency by an analogue signal, at another time in phase by a digital signal |
| 04/24/1985 | EP0138693A1 Method and apparatus for supervising digital radio transmission line |
| 04/24/1985 | EP0138366A2 Frequency control for point-to-multipoint radio |
| 04/24/1985 | EP0138364A2 Multifrequency tone distribution using a conference arrangement |
| 04/23/1985 | US4513385 Apparatus and method for suppressing side lobe response in a digitally sampled system |
| 04/23/1985 | CA1186080A1 Modem with low part count and improved demodulator |
| 04/23/1985 | CA1186026A1 Equalizer having a substantially constant gain at a preselected frequency |
| 04/16/1985 | US4512013 Simultaneous transmission of speech and data over an analog channel |
| 04/16/1985 | US4511862 Programmable multitone DPSK modulator |