| Patents for H04L 27 - Modulated-carrier systems (89,721) |
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| 04/09/1985 | US4510611 Transceiver circuit for interfacing between a power line communication system and a data processor |
| 04/09/1985 | US4510536 Signal conditioning method and apparatus for FM code signal |
| 04/02/1985 | US4509206 Receiver for multicarrier signals protected from unwanted signals |
| 04/02/1985 | US4509171 Modem multiplexer synchronization by radial modulation |
| 03/28/1985 | WO1985001407A1 Digital signal processor modem |
| 03/27/1985 | EP0135437A1 Sinusoidal signal generator, the frequency of which is dependent upon a binary signal, in particular for a modem |
| 03/27/1985 | EP0135377A2 Modulator and demodulator for operation with amplitude and phase keyed modulation signals |
| 03/27/1985 | EP0135057A1 Demodulator for multilevel amplitude modulation system |
| 03/27/1985 | EP0134860A1 Improved modem signal acquisition technique |
| 03/26/1985 | US4507648 Decoding technique for multidimensional codes |
| 03/26/1985 | US4507617 For use in a demodulator |
| 03/19/1985 | CA1184260A1 Fractional-division frequency synthesizer for digital angle-modulation |
| 03/13/1985 | EP0134101A2 Differentially nonlinear convolutional channel coding with expanded set of signalling alphabets |
| 03/13/1985 | EP0133892A1 Decoder for a frequency shift keying signal, in particular for an FSK facsimile signal |
| 03/13/1985 | EP0040217B1 Apparatus for and method of processing data signals |
| 03/12/1985 | US4504975 System for transmitting digital signals over an optical fiber |
| 03/12/1985 | US4504802 Digital PSK modulator for modem |
| 03/05/1985 | US4503545 In a data communication system |
| 02/28/1985 | WO1985000946A1 Maintenance response signalling arrangement for a digital transmission system |
| 02/28/1985 | WO1985000945A1 Control signalling arrangement for a digital transmission system |
| 02/26/1985 | CA1183221A1 Carrier recovery arrangement for sixteen-state amplitude and phase modulation and receiving system for digital data, comprising such an arrangement |
| 02/19/1985 | US4501020 Spectrum surveillance receiver system |
| 02/19/1985 | US4501002 Offset QPSK demodulator and receiver |
| 02/19/1985 | US4500857 Frequency modulated phase locked loop |
| 02/19/1985 | US4500856 Simplified minimum shift keying modulator |
| 02/19/1985 | CA1182875A1 Spectrum shaping microwave digital modulators |
| 02/13/1985 | EP0133107A1 Apparatus for coding and decoding a broad-band transmission |
| 02/13/1985 | EP0132833A2 Improved digital PSK modulator for modem |
| 02/13/1985 | EP0023511B1 Process and device for detecting and interpreting a distress signal |
| 02/12/1985 | US4499585 Method and apparatus for producing a shaped spectrum modulating signal |
| 02/12/1985 | US4499425 Phase velocity sign detector for frequency shift key demodulation |
| 02/12/1985 | CA1182576A1 Automatic digital strapping apparatus for data modems |
| 02/06/1985 | EP0037827B1 Receiver for complex data signals |
| 02/05/1985 | US4498198 Binary signal decoding apparatus and method |
| 02/05/1985 | US4498050 Demodulation device for composite PSK-PSK modulated waves |
| 01/29/1985 | US4496918 Radio frequency alternate-path phase switch |
| 01/29/1985 | CA1181818A1 Noise detector and signal receiver arrangement for a frequency modulated receiver |
| 01/23/1985 | EP0131725A2 Method and circuit for compensating non linear amplitude and/or phase distortions |
| 01/22/1985 | US4495620 Transmitting data on the phase of speech |
| 01/22/1985 | US4495477 Multiple amplitude and phase shift keyed signal modulation method |
| 01/17/1985 | WO1985000255A1 Digital modem with plural microprocessors |
| 01/16/1985 | EP0131055A1 Automatic gain control circuit. |
| 01/16/1985 | EP0131054A1 Circuit for reducing errors in a data receiver. |
| 01/15/1985 | US4494240 Modem end of message detector |
| 01/15/1985 | US4494239 Frame synchronization and phase ambiguity resolution in QAM transmission systems |
| 01/15/1985 | CA1181135A1 Receiver with filters for equalizing and converting |
| 01/08/1985 | US4493082 Soft decision convolutional code transmission systems |
| 01/08/1985 | US4492936 Fractional-division frequency synthesizer for digital angle-modulation |
| 01/02/1985 | CA1180399A Multiple phase digital modulator |
| 01/01/1985 | US4491805 BPSK And QPSK transmission systems having phase locked loop for regenerating the carrier wave |
| 12/27/1984 | EP0129175A2 Equalizer modifying a phase of a gain control signal to carry out equalization |
| 12/18/1984 | US4489421 Digital message transmission system employing pulse stuffing and having two plesiochronic sampling clocks |
| 12/18/1984 | US4489418 Differential encoding technique |
| 12/18/1984 | US4489416 In a data transmission system |
| 12/18/1984 | CA1179744A1 Quadriphase differential demodulator |
| 12/12/1984 | EP0127941A1 Demodulator logic for frequency shift keyed signals |
| 12/11/1984 | US4488238 Selection stage of the AC signal of greater amplitude between two signals of different frequencies |
| 12/11/1984 | US4488120 Frequency shift keying demodulator using a phase locked loop and voltage comparator |
| 12/04/1984 | US4486715 Frequency shift key demodulator |
| 11/27/1984 | US4485478 Digital burst signal transmission system |
| 11/27/1984 | US4485448 Apparatus and method for detecting the onset of a frequency shift keyed signal |
| 11/27/1984 | US4485357 Circuit for amplitude and phase modulation of carrier signal by two respective input signals |
| 11/27/1984 | US4485347 Digital FSK demodulator |
| 11/27/1984 | CA1178665A1 Method and apparatus for converting binary information into a high density single-side band signal |
| 11/22/1984 | WO1984004640A1 Method for the non-coherent demodulation of a constant symbol powered, linearly modulated signal and demodulator for implementing such method |
| 11/22/1984 | WO1984004636A1 Message communication system with message storage |
| 11/21/1984 | EP0125979A1 Demodulator for constant envelope and continuous phase signals angularly modulated by a series of binary symbols |
| 11/21/1984 | EP0125805A2 Bit error detection circuit for PSK-modulated carrier wave |
| 11/21/1984 | EP0125723A1 Carrier frequency equalizing apparatus controlled by base-band signals |
| 11/21/1984 | EP0125722A1 Circuit for joint adaptive equalisation and demodulation |
| 11/20/1984 | US4484337 Carrier wave regenerating circuit |
| 11/20/1984 | US4484295 Control circuit and method for varying the output of a waveform generator to gradually or rapidly vary a control signal from an initial value to a desired value |
| 11/13/1984 | US4483012 Differentially convolutional channel coding with expanded set of signalling alphabets |
| 11/13/1984 | US4483009 Tranversal equalizer |
| 11/13/1984 | CA1177893A1 Digital modem transmitter |
| 11/07/1984 | EP0124031A1 Digital quadrature amplitude modulation method |
| 11/06/1984 | US4481678 Signal receiving circuit for optical communication |
| 11/06/1984 | US4481658 FM-broadcasting system with transmitter identification by binary phase-modulated, differentially coded code signal |
| 11/06/1984 | US4481646 Method and apparatus for receiving a data signal modulated by means of a double sideband-quadrature carrier modulation technique |
| 11/06/1984 | US4481645 Linear distortion canceller circuit |
| 11/06/1984 | US4481642 Integrated circuit FSK modem |
| 11/06/1984 | US4481640 Spread spectrum modem |
| 11/06/1984 | US4481489 Binary signal modulating circuitry for frequency modulated transmitters |
| 10/31/1984 | EP0123587A1 Carrier and clocking frequency recovery for digital transmission systems with phase or amplitude modulation and coherent demodulation |
| 10/30/1984 | US4480327 Single channel duplex communication system |
| 10/25/1984 | WO1984004217A1 Simultaneous transmission of speech and data over an analog channel |
| 10/24/1984 | EP0122805A2 Block coded modulation system |
| 10/24/1984 | EP0122680A1 Transmission circuit for a DTMF telephone set |
| 10/24/1984 | EP0122637A2 Automatic adaptive equalizer |
| 10/24/1984 | EP0047303B1 Method and apparatus for demodulating quadriphase differential transmissions |
| 10/23/1984 | US4479258 Cross-polarization crosstalk canceller |
| 10/23/1984 | US4479253 Phaselock receiver with input signal measuring capability |
| 10/23/1984 | US4479229 Arrangement for and method of detecting multi-frequency sound code signals |
| 10/23/1984 | US4479099 Multiple phase modulator for N sets of digital data |
| 10/23/1984 | US4479092 Digital frequency-shift keyed demodulator |
| 10/17/1984 | EP0122127A2 Radio communication system |
| 10/16/1984 | US4477916 Transmitter for angle-modulated signals |
| 10/16/1984 | US4477913 Automatic equalizer apparatus |
| 10/16/1984 | CA1176334A1 Apparatus for connecting data communication equipment and data terminal equipment |
| 10/16/1984 | CA1176312A1 Tone detector circuit |