| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 04/07/1987 | US4656318 Modem with power-off ring detection |
| 04/02/1987 | DE3534054A1 Device for transmitting data telegrams occurring in serial form |
| 04/01/1987 | CN86106042A Method and apparatus for identifying the components of a signal |
| 03/31/1987 | US4654864 Phase synchronizing circuit |
| 03/31/1987 | US4654861 Method and device for measuring phase jitter on a transmission channel |
| 03/31/1987 | CA1219956A1 Programmable multiple type data modem |
| 03/25/1987 | EP0215166A2 Digital communication system |
| 03/24/1987 | US4653073 Low error rate digital demodulator |
| 03/24/1987 | US4653072 Low error rate digital demodulator |
| 03/24/1987 | US4653071 Carrier recovery circuit for PSK communication system |
| 03/24/1987 | US4652838 Phase randomization to reduce detectability of phase or frequency-modulated digital signals |
| 03/24/1987 | US4652834 Rapid acquisition demodulation system |
| 03/24/1987 | US4652775 Adaptive threshold detector |
| 03/17/1987 | US4651320 Inband coding of secondary data |
| 03/17/1987 | US4651108 Demodulation circuit having means for detecting phase difference |
| 03/17/1987 | US4651107 Demodulator for digital FM signals |
| 03/17/1987 | US4651104 Frequency converter with automatic frequency control |
| 03/12/1987 | DE3532427A1 Method for fast identification and correction of a + 90 DEG jump of the demodulation carrier in a digital transmission system with QPSK offset modulation |
| 03/12/1987 | DE3531104A1 Circuit arrangement for increasing at the receiving end the difference in the period lengths in frequency-modulated data transmission |
| 03/12/1987 | DE3531078A1 Data transmission outside the voice band on two-wire lines |
| 03/11/1987 | EP0213846A2 Waveform generation method |
| 03/11/1987 | EP0213821A2 Carrier wave recovery system |
| 03/11/1987 | EP0213651A1 Receiving equipment for the recognition of a number of different and predetermined frequency combinations of voice-frequency signalling components under the protection of a spurious-signal/voice-signal guard function |
| 03/11/1987 | EP0213309A2 Automatic gain control circuit |
| 03/11/1987 | EP0213224A1 Method for rapid gain acquisition in a modem receiver |
| 03/10/1987 | US4649551 Decoder for a frequency-keyed signal, particularly an FSK-video text signal |
| 03/04/1987 | EP0212582A2 Demodulation system capable of establishing synchronization in a transient state |
| 03/04/1987 | EP0212030A1 Apparatus for detecting the end of the energy of a data signal |
| 03/04/1987 | EP0211995A1 Method and arrangement for detecting the presence of a training signal in a modem receiver |
| 03/03/1987 | US4648134 Optical receivers |
| 03/03/1987 | US4648100 Carrier recovery circuit |
| 03/03/1987 | US4648099 Digital minimum shift keyed modulator |
| 03/03/1987 | US4647864 Variable-delay, sine-cosine non-coherent demodulator |
| 03/03/1987 | US4647863 Saw transition detector for PSK signals |
| 03/03/1987 | CA1218712A1 Baseband-controlled passband equalizing arrangement |
| 02/26/1987 | WO1987001256A1 Telephone and demodulator |
| 02/26/1987 | EP0116625A4 Multiple simultaneous tone decoder. |
| 02/25/1987 | EP0211758A1 Method and receiver for packet transmission of digital signals over a broad-band channel |
| 02/24/1987 | US4646359 Method and apparatus for controlling the carrier of an amplitude-modulated transmitter |
| 02/24/1987 | US4646326 QAM modulator circuit |
| 02/24/1987 | US4646325 Index decoder for digital modems |
| 02/24/1987 | US4646323 Method and system for digital data transmission |
| 02/24/1987 | US4646320 Automatic digital strapping apparatus for data modems |
| 02/24/1987 | US4646305 High speed data modem using multilevel encoding |
| 02/24/1987 | US4646173 Converting and decoding receiver for digital data recorded in analog form on magnetic tape |
| 02/24/1987 | US4645881 DC level trip detector |
| 02/24/1987 | CA1218425A1 Carrier detection circuit |
| 02/17/1987 | US4644566 Low error rate digital demodulator |
| 02/17/1987 | US4644565 Superposed quadrature modulated baseband signal processor |
| 02/17/1987 | US4644561 Modem for RF subscriber telephone system |
| 02/17/1987 | US4644537 Inband coding of secondary data |
| 02/17/1987 | CA1218120A1 Automatic adaptive equalizer |
| 02/17/1987 | CA1218116A1 Circuit for reducing errors in a data receiver |
| 02/10/1987 | US4642573 Phase locked loop circuit for demodulating suppressed carrier signals |
| 02/10/1987 | CA1217852A Integrated circuit for combined analog and digital demodulation |
| 02/04/1987 | EP0210688A2 Signal transmission system and a transmitter and a receiver for use in the system |
| 02/03/1987 | US4641325 Receiver for phase shift modulated carrier signals |
| 02/03/1987 | US4641323 Multi-phase PSK demodulator |
| 02/03/1987 | US4641318 Method for improving the reliability of data transmission over Rayleigh fading channels |
| 02/03/1987 | US4640990 Telephone answering apparatus having two integrators of different time constants |
| 02/03/1987 | CA1217530A1 Block coded modulation system |
| 01/28/1987 | EP0209928A1 Demodulator for a frequency-modulated digital signal |
| 01/28/1987 | EP0209902A2 Multilevel modulator comprising a compact error correcting code producing unit |
| 01/27/1987 | US4639939 Apparatus for cancelling periodic carrier phase jitters |
| 01/27/1987 | US4639935 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission |
| 01/27/1987 | US4639682 Carrier reproducing circuit for phase shift keying signals |
| 01/27/1987 | CA1217233A1 Qam with dc bias in one channel |
| 01/22/1987 | DE3525586A1 Method and arrangement for digital demodulation of FSK signals |
| 01/21/1987 | EP0208982A1 Digital branch filter for a data receiver |
| 01/21/1987 | EP0208915A1 Method for demodulating a frequency and phaseshift keyed signal |
| 01/21/1987 | EP0208905A1 Method for generating an FSK-PSK-modulated signal |
| 01/21/1987 | EP0208872A1 Method for the transmission of digital data |
| 01/21/1987 | EP0208843A2 Method and device for the transmission of binary data signals using frequency shift keying |
| 01/20/1987 | US4638495 Automatic adaptive equalizer |
| 01/14/1987 | EP0208284A2 Demodulator capable of avoiding abnormal demodulation |
| 01/14/1987 | EP0208270A2 Microwave relay station having a common standbby channel for signals of different types of modulation |
| 01/13/1987 | US4637035 Digital modem for multiple telephone circuits |
| 01/08/1987 | DE3522734A1 Method for coding information for use in angle modulation methods (e.g. frequency modulation) |
| 01/07/1987 | EP0207291A2 Voltage/frequency converter |
| 01/06/1987 | US4635279 Arrangement for coherently generating sinusoids of different frequencies, and angle modulation data receiver using the arrangement |
| 01/06/1987 | US4635278 Autoregressive digital telecommunications system |
| 01/06/1987 | US4634990 Apparatus for demodulating differential phase shift keyed signals |
| 12/31/1986 | WO1986007658A1 Digital information transmission system and method |
| 12/30/1986 | US4633517 Circuit for decoding traffic information message tone signals |
| 12/30/1986 | US4633485 Adaptive noise suppression for digital modems |
| 12/30/1986 | US4633484 Receiver unit in radio communication system |
| 12/30/1986 | US4633464 Control signalling arrangement for a digital transmission system |
| 12/30/1986 | EP0206770A2 Coded modulation system with a simplified decoder capable of reducing the effects of channel distortion |
| 12/30/1986 | EP0206572A1 Video optimized modulator-demodulator |
| 12/30/1986 | EP0206443A2 Decoder for digital radio-received data and method |
| 12/30/1986 | EP0206264A2 Expanded partial response processing for analog signal enciphering and the like |
| 12/30/1986 | EP0206203A2 Recording and reproducing apparatus using a modulator/demodulator for Offset Quadrature Differential Phase-Shift Keying |
| 12/23/1986 | US4631738 Gain tracker for digital modem |
| 12/23/1986 | US4631708 Transmitter/responder systems |
| 12/23/1986 | US4631694 Sine wave synthesizer |
| 12/23/1986 | US4631488 QAM demodulator with distortion compensation |
| 12/23/1986 | US4631486 M-phase PSK vector processor demodulator |
| 12/18/1986 | WO1986007513A1 Coherent optical receivers |
| 12/17/1986 | EP0204745A1 Data modem system. |
| 12/17/1986 | CN86100014A Modem for rf subscriber telephone system |