H04L 27 - Modulated-carrier systems

Patents for H04L 27 - Modulated-carrier systems (89,721)
03/1977
03/01/1977	US4010323 Digital timing recovery
02/1977
02/22/1977	US4009353 Analog signal detection
02/15/1977	US4008378 Multi-radix digital communications system with time-frequency and phase-shift multiplexing
02/15/1977	US4008373 Digital differential phase shift keyed modulator
02/08/1977	US4007331 Apparatus for demodulation of relative phase modulated binary data
02/08/1977	US4007330 Method and apparatus for demodulation of relative phase modulated binary data
02/01/1977	US4006418 Quaternary phase-shift keying with time delayed channel
02/01/1977	US4006416 Digital communication system
01/1977
01/18/1977	US4004255 Microwave frequency phase modulator
01/18/1977	US4004226 QAM receiver having automatic adaptive equalizer
01/18/1977	US4004105 Multifrequency signal receiver for use in telephone signaling systems or the like
01/18/1977	US4004100 Group frame synchronization system
01/11/1977	US4003002 Modulation and filtering device
01/11/1977	US4003001 Multi-line, multi-mode modulator using bandwidth reduction for digital FSK and DPSK modulation
01/11/1977	US4002982 Digital transmission system using radio link and method of operating same
01/04/1977	US4001775 Automatic bit synchronization method and apparatus for a logging-while-drilling receiver
01/04/1977	US4001521 Signal identification system
01/04/1977	US4001504 Automatic terminal data rate selection
12/1976
12/28/1976	US4000476 Phase locked loop with circuit for preventing sidelock
12/14/1976	US3997855 Digital FSK time rate of change modulator
12/14/1976	US3997848 Linear phase demodulator including a phase locked loop with auxiliary feedback loop
12/14/1976	US3997847 Digital demodulator for differentially encoded phase-shift-keyed data
11/1976
11/23/1976	US3993956 Digital detection system for differential phase shift keyed signals
11/23/1976	US3993868 Minimum shift keying communication system
11/16/1976	US3992673 System for demodulating a digital modulated wave
11/16/1976	US3992617 Chopping correlator for a MSK data signal
11/16/1976	US3991611 Digital telemetering system for subsurface instrumentation
11/09/1976	US3991389 Digital frequency shift key modulator
11/09/1976	US3991377 Differential phase shift keying demodulator
11/02/1976	US3990071 Data transmission system using frequency permutation codes
11/02/1976	US3990015 Differential phase shift keyed detector utilizing a circulating memory
11/02/1976	US3990006 Digital tone detector using concatenated detection intervals
10/1976
10/26/1976	US3988540 Integrated circuit modem with a memory storage device for generating a modulated carrier signal
10/26/1976	US3988539 Data transmission system using optimal eight-vector signaling scheme
10/19/1976	US3987422 System for detecting signal quality of a phase-modulated wave
10/19/1976	US3987406 Seismic group recorder control system
10/19/1976	US3987374 Multi-line, multi-mode modulator using bandwidth reduction for digital FSK and DPSK modulation
10/05/1976	US3984835 Homodyne communication system
10/05/1976	US3984778 Carrier recovery scheme for a SSB-SC signal
10/05/1976	US3984777 Carrier wave reproducer device for use in the reception of a multi-phase phase-modulated wave
10/05/1976	US3984634 Anti-multipath digital signal detector
09/1976
09/28/1976	US3983546 Phase-to-pulse conversion circuits incorporating Josephson devices and superconducting interconnection circuitry
09/28/1976	US3983501 Hybrid tracking loop for detecting phase shift keyed signals
09/28/1976	US3983499 Multi-phase PSK demodulator
09/28/1976	US3983495 Digital waveform generator
09/28/1976	US3983485 Multi-phase and multi-amplitude level modulator and modulation and demodulation methods
09/28/1976	US3983381 Digital automatic gain control circuit
09/14/1976	US3980971 Modulator for hybrid modulation by more and less significant digital signals in succession in each clock interval and counterpart demodulator
09/14/1976	US3980962 Demodulators
09/14/1976	US3980961 Frequency demodulator for a FSK data transmission system
09/14/1976	US3980945 Digital communications system with immunity to frequency selective fading
09/14/1976	US3980825 System for the transmission of split-phase Manchester coded bivalent information signals
09/07/1976	US3979685 Frequency shift key demodulator
08/1976
08/31/1976	US3978407 Fast start-up adaptive equalizer communication system using two data transmission rates
08/31/1976	US3978406 Code error detecting system in digital code transmission
08/24/1976	US3976996 Conversion of FSK to NRZ coding
08/24/1976	US3976843 MFC receiver digital signal processing
08/10/1976	US3974449 Joint decision feedback equalization and carrier recovery adaptation in data transmission systems
08/03/1976	US3973241 Information transmission system
08/03/1976	US3973212 Phase detection in phase lock loop circuit
08/03/1976	US3973211 Combiner-demodulator for phase shift keyed suppressed carrier signals received over two transmission paths
08/03/1976	US3973210 Electrical wave filter
08/03/1976	US3973201 PSK modulator with reduced spectrum occupancy
08/03/1976	US3973087 Signal repeater for power line access data system
07/1976
07/27/1976	US3972000 Phase filter for reducing the effects of the noise components altering discrete phase modulated signals
07/27/1976	US3971999 Coherent phase demodulator for phase shift keyed suppressed carrier signals
07/27/1976	US3971998 Recursive detector-oscillator circuit
07/27/1976	US3971996 Phase tracking network
07/20/1976	US3970946 Demodulator for amplitude-and-phase modulated signals having control means for reducing phase and amplitude errors
07/20/1976	US3970945 Method and apparatus for demodulating PSK modulated oscillations
07/13/1976	US3969678 Band pass filter circuit with automatic bandwidth adjust
07/13/1976	US3969617 Multichannel digital modulator
07/13/1976	US3969590 Surface acoustic wave apparatus
06/1976
06/29/1976	US3967202 Data transmission system including an RF transponder for generating a broad spectrum of intelligence bearing sidebands
06/29/1976	US3967062 Method and apparatus for encoding data and clock information in a self-clocking data stream
06/08/1976	US3962653 Arrangement for simultaneously producing signals having an increasing frequency and signals having a decreasing frequency
06/08/1976	US3962637 Ultrafast adaptive digital modem
06/01/1976	US3961286 Reflection type phase modulator having reduced temperature sensitivity and reduced distortion
06/01/1976	US3961277 Frequency demodulator, especially for data-transmission system
05/1976
05/25/1976	US3959726 Pilot signal transmission system
05/25/1976	US3959586 Frequency burst communication system
05/18/1976	US3958215 Device for the acoustic submarine teletyping
05/18/1976	US3958191 Multi-line, multi-mode modulator using bandwidth reduction for digital fsk and dpsk modulation
05/11/1976	US3956623 Digital phase detector
05/04/1976	US3955142 Single-sideband radiotelephone system
05/04/1976	US3955141 Synchronizing circuit for modems in a data communications network
04/1976
04/27/1976	US3953798 Method and device for radio transmission of binary data signals
04/20/1976	US3952187 Circuit for transforming rectangular coordinates to polar coordinates
04/06/1976	US3949301 Digital click removal and squelch control circuit for an FM receiver
03/1976
03/30/1976	US3947777 Circuit arrangement for the demodulation of a phase-modulated signal
03/30/1976	US3947769 Threshold correction system in FSK transmissions
03/30/1976	US3947768 Carrier-modulation data transmission equalizers
03/30/1976	US3947767 Multilevel data transmission system
03/30/1976	US3947633 Circuit arrangement for demodulating a frequency-differential, phase-modulated signal
03/23/1976	US3946321 Digital encoder
03/16/1976	US3944939 Demodulator assembly for trains with differential phase modulation
03/16/1976	US3944929 Monitor for a receiver having means for specifying regions within discrimination domains of a signal space
03/16/1976	US3944742 Burst frequency shift keying data communication system
03/09/1976	US3943448 Apparatus and method for synchronizing a digital modem using a random multilevel data signal
03/09/1976	US3943285 Multiplexed data modem

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