Patents
Sitemap › H04 - Electric communication technique › H04L - Transmission of digital information, e.g. telegraphic communication › H04L 27 - Modulated-carrier systems
Patents for H04L 27 - Modulated-carrier systems (89,721)
11/1996
11/19/1996US5575740 Striding exerciser with upwardly curved tracks
11/19/1996CA2081154C Digital modulator with digital power control circuit
11/14/1996WO1996036152A1 Demodulator and a method of demodulation in a tdm receiver
11/14/1996WO1996036135A1 Apparatus for multi-rate simulcast communications
11/14/1996WO1996036104A1 A direct conversion receiver
11/14/1996DE19513080C1 Demodulator for orthogonally modulated carrier signals
11/13/1996EP0742654A1 Multicarrier digital signal reducing co-channel interference with an analog television signal, and receiver for such a signal
11/13/1996CN1135815A Multipath search processor for a spread spectrum multiple access communication system
11/13/1996CN1135697A Device for correcting phase-error of residual sideband signal
11/13/1996CN1135685A Multi-level coding for decimalplace
11/12/1996US5574998 Automatic frequency control circuit for control of reference oscillator in communication apparatus
11/12/1996US5574994 Method of correcting carrier leak in a transmitter
11/12/1996US5574755 I/Q quadraphase modulator circuit
11/12/1996US5574750 Methods and apparatus for detecting a cellular digital packet data (CDPD) carrier
11/12/1996US5574737 In a communication network
11/12/1996US5574725 Communication method between a personal computer and communication module
11/12/1996US5574721 Orthogonal code tracking system having phantom carrier signal
11/12/1996US5574450 Synchronization adder circuit
11/12/1996US5574409 Apparatus and method for adjusting microwave BPSK modulator and mixer
11/12/1996US5574399 Coherent PSK detector not requiring carrier recovery
11/12/1996CA2064758C Communication signal having a time domain pilot component
11/07/1996WO1996035286A1 Data adapter
11/07/1996WO1996035279A1 Wireless local area network system and receiver for the same
11/07/1996WO1996035278A1 Construction of a multicarrier signal
11/07/1996WO1996035274A1 Method and apparatus for providing control and message channels
11/07/1996WO1996035268A1 Method of receiving and searching a signal transmitting in bursts
11/07/1996DE19532425C1 Continuous digital code squelch system signal transmission device
11/06/1996EP0741478A2 Circuit for performing arithmetic operations in a demodulator
11/06/1996EP0741477A1 Digital phase filter
11/06/1996EP0741472A2 Method and circuit arrangement for processing variable symbol rates
11/06/1996EP0740869A1 Process for digital frequency correction in multi-carrier transmission processes
11/06/1996EP0740868A1 Method and arrangement for synchronization in ofdm modulation
11/06/1996CN1135130A Frequency-shift key-control signal receiver
11/06/1996CN1135129A Timing recovery in network-synchronized modem
11/05/1996US5572588 Method and apparatus for detecting reception of a tone signal
11/05/1996US5572553 Digital apparatus for broadband carrier-recovery
11/05/1996US5572551 Carrier loop acquisition for staggered phase shift keying
11/05/1996US5572550 Decision directed carrier recovery circuit using phase error detector
11/05/1996US5572548 Method of coherent modulation and demodulation for high frequency data transmission at high bit rate
11/05/1996US5572537 Modulator-demodulator device capable of detecting an unsynchronized frame state based on hard and soft error values
11/05/1996US5572532 Convolutional interleaver and deinterleaver
11/05/1996US5572262 Receiver based methods and devices for combating co-channel NTSC interference in digital transmission
11/05/1996US5570992 Free-traveling manipulator with optical feedback control and methods
11/05/1996CA2104729C Quadrature modulation circuit for use in a radio transmitter
11/05/1996CA2007973C Method of controlling the frequency of a coherent radio receiver and apparatus for carrying out the method
11/02/1996CA2148308A1 Detector for demodulating a received signal and producing an information data signal with reduced intersymbol interference
10/1996
10/31/1996WO1996034481A2 Adaptive filter for use in a tdm/tdma receiver
10/30/1996EP0740444A1 Phase detector
10/30/1996EP0740437A1 Hardware-efficient frequency de-interleaving
10/30/1996EP0739563A1 Higher order digital phase loop filter
10/30/1996EP0739555A1 Satellite receiver system having doppler frequency shift tracking
10/30/1996CN1134637A Timing recovery in network-synchronized modem
10/29/1996US5570396 Transmission system comprising receiver with improved timing means
10/29/1996US5570394 Signal transmission system
10/29/1996US5570391 Trellis coding method using a multilevel delay device
10/29/1996US5570379 Coded modulation apparatus
10/29/1996US5570351 Multi-user communication system employing spread signatures
10/29/1996US5570350 CDMA cellular communications with multicarrier signal processing
10/29/1996CA2156001A1 Initial phase-loading circuit for a fractionally-spaced linear equalizer
10/29/1996CA2078705C Method and arrangement of coherently demodulating psk signals using a feedback loop including a filter bank
10/24/1996WO1996033582A2 Transmission system with improved tone detection
10/24/1996WO1996033581A2 Transmission system with improved tone detection
10/24/1996WO1996033553A1 Fixed compromise equalization for a dual port fm modulator
10/24/1996DE19609504A1 Empfänger und zugehöriges Verfahren zur Taktrückgewinnung und zur Frequenzschätzung Receiver and associated method for clock recovery and for frequency estimation
10/23/1996EP0739117A1 Digital radio communication equipment
10/23/1996EP0739090A1 Transceiver and method for generating and processing of complex I/Q-signals
10/23/1996CN1134066A Flash FM infrared modem
10/22/1996US5568521 Phase lock indicator circuit for a high frequency recovery loop
10/22/1996US5568520 Slope drift and offset compensation in zero-IF receivers
10/22/1996US5568518 Fast automatic gain control
10/22/1996US5568517 Decoding device for performing amplitude-phase demodulation and viterbi decoding
10/22/1996US5567925 Data collection terminal
10/22/1996CA2066420C Dual mode automatic frequency control
10/22/1996CA2062980C Hybrid modulation apparatus
10/17/1996WO1996032797A1 Fft receiver for mfsk
10/17/1996WO1996032796A1 Time shift keying digital communications system
10/17/1996WO1996032795A1 Automatic modulation mode selecting unit and method for modems
10/17/1996WO1996032784A2 Communications system and transmitting means therefor
10/17/1996DE19535356C1 Method of demodulating amplitude modulated high frequency signals
10/17/1996DE19516768A1 Time modulation method for digital data transmission
10/17/1996CA2218057A1 An electronic circuit for and a method of decoding a signal
10/16/1996EP0738064A2 Modulation and demodulation method, modulator and demodulator
10/16/1996EP0738054A2 PLL circuit for use in a digital broadcast receiver
10/16/1996EP0738053A2 Automatic frequency control circuit applicable to a mobile communication system
10/16/1996EP0737394A1 A qam constellation which is robust in the presence of phase noise; encoder and decoder for this constellation
10/16/1996EP0737393A1 64 qam signal constellation which is robust in the presence of phase noise and has low decoding complexity
10/16/1996EP0737386A1 Method and system for data communication, using a m-ary modulation scheme and inleaving means
10/16/1996EP0737380A1 A wireless digital synchronized diversity receiver
10/16/1996CN1133661A Method and apparatus for the transmission of variable rate digital data
10/16/1996CN1133659A Variable rate signal transmission in a spread spectrum communication system using coset coding
10/16/1996CN1133656A Digital radio link system and radio link terminal
10/15/1996US5566214 Automatic noise normalization and reacquisition control for a QPSK demodulator symbol tracking loop
10/15/1996US5566211 Automatic frequency control method and apparatus therefor
10/15/1996US5566210 Data receiving apparatus
10/15/1996US5566191 Soft decision maximum likelihood decoding method with adaptive metric
10/15/1996US5566184 Phase ambiguity removing device
10/15/1996US5565932 AGC system with pilot using digital data reference
10/15/1996US5565930 Receiver with oversampling analog-to-digital conversion for digital signals accompanied by analog TV signals
10/15/1996US5565926 Method and apparatus for communicating digital television signals using a signal constellation formed by four signal constellations placed in the quadrants
10/15/1996US5565812 Increased sensitivity signal shaper circuit to recover a data stream coming from a digitally modulated channel
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