| Patents for H04L 27 - Modulated-carrier systems (89,721) |
|---|
| 07/23/1993 | CA2087862A1 Digital phase and amplitude modulator |
| 07/22/1993 | WO1993014588A1 Method and apparatus for the formatting of data for transmission |
| 07/22/1993 | WO1993014585A1 Frequency synchronized bidirectional radio system |
| 07/21/1993 | EP0552034A2 Simultaneous transmission of data and analog voice-band signals |
| 07/21/1993 | EP0551646A2 Concatenated block and convolution encoder-decoder |
| 07/21/1993 | EP0551573A2 Angle modulator, particularly for digital radio transmission |
| 07/21/1993 | EP0551561A2 Digital modulators for use with subnyquist sampling of raster-scanned samples of image intensity |
| 07/21/1993 | CN1074575A Digital modulators for use with sub-nyquist sampling of raster-scanned samples of image intensity |
| 07/21/1993 | CN1021688C Linear transmitter training method and apparatus |
| 07/20/1993 | US5230098 Relay receiver having a variable bandwidth |
| 07/20/1993 | US5230095 Radio receiver for data communication |
| 07/20/1993 | US5230015 Method and apparatus for static video telephone transmission/receiving |
| 07/20/1993 | US5230010 Fractional rate modulation |
| 07/20/1993 | US5230009 Method for deciding region of PI/4 shift quadriphase shift keying modulated signals |
| 07/20/1993 | US5229997 Carrier recovery control with sequential fec sync detection and frame sync detection |
| 07/20/1993 | CA2011264C Phase-locked loop bandwidth switching demodulator for suppressed carrier signals |
| 07/20/1993 | CA1320604C Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
| 07/14/1993 | EP0551081A2 Adaptive equalizer and receiver |
| 07/14/1993 | EP0550712A1 Method and device for modulating and demodulating transmission subchannels for a compatible television system. |
| 07/14/1993 | CN1074318A Gain control circuit for radio transmitter |
| 07/14/1993 | CA2074596A1 Digital modulators for use with sub-nyquist sampling of raster-scanned samples of image intensity |
| 07/13/1993 | US5228062 Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in multicarrier modems |
| 07/13/1993 | US5228060 Control unit for controlling modem used in receiver |
| 07/13/1993 | US5228043 Direct modulation phase shift keying (dm-psk) transmission system |
| 07/13/1993 | US5228025 Method for the broadcasting of digital data, notably for radio broadcasting at a high bit-rate towards mobile receivers, with time-frequency interlacing and assistance in the acquisition of automatic frequency control, and corresponding receiver |
| 07/13/1993 | US5227908 Optical communication apparatus using intensity modulation |
| 07/13/1993 | US5227741 Variable speed asynchronous modem |
| 07/13/1993 | CA1320253C Demodulation process and continuous phase and/or frequency modulation constant envelope amplitude digital signal demodulator |
| 07/10/1993 | WO1993014587A1 Quadrature amplitude modulation synchronization method |
| 07/08/1993 | WO1993013614A1 Novel device and method for precoding___________________________ |
| 07/08/1993 | DE4300126A1 Timing clock signal reproducer with error signal generator - includes switch=off unit preventing integration of temporal error signal on basis of detected input abnormality |
| 07/07/1993 | EP0550360A1 Lock detector for a phase locked loop |
| 07/07/1993 | EP0550249A2 Modulation method and circuit arrangement |
| 07/07/1993 | EP0550144A1 Method and apparatus for detection of a control signal in a communication system |
| 07/07/1993 | EP0550046A2 Routing and switching of optical packets with multiplexed data and header |
| 07/07/1993 | CN1074068A Viterbi decoder bit efficient chainback memory method and decoder incorporating same |
| 07/06/1993 | US5226081 Multi-carrier communication system using ciphered carrier bit assignment information |
| 07/06/1993 | US5226038 Method for converting and method for processing electronic multiplex signals, and apparatus for processing such signals |
| 07/06/1993 | US5225902 Automatic frequency selection in a bi-directional cable television system |
| 07/06/1993 | US5225795 Digital quadrature modulator |
| 07/06/1993 | CA2019359C Detection of a particular signal sequence with no adverse influence of multipath transmission |
| 07/06/1993 | CA1319957C2 Subscriber unit for wireless digital telephone system |
| 07/01/1993 | WO1993013613A1 Gain control circuit for radio transmitter |
| 07/01/1993 | CA2085395A1 Routing and switching of high-speed data with the header transmitted on a subcarrier frequency |
| 06/30/1993 | EP0549517A1 Level determining circuit for a predetermined frequency of an audio frequency signal |
| 06/30/1993 | EP0549451A1 Frequency multiplex apparatus employing digital filters |
| 06/30/1993 | EP0549445A1 Method for the transmission of reference signals in a multicarrier data transmission system |
| 06/30/1993 | EP0548982A2 Non-coherent PSK demodulator using delaye detection |
| 06/30/1993 | EP0548205A1 Reception of orthogonal frequency division multiplexed signals |
| 06/30/1993 | EP0548089A1 Token ring synchronization |
| 06/29/1993 | CA2025232C Carrier recovery system |
| 06/29/1993 | CA2025135C Frequency tracking circuit using samples equalized at different sampling instants of same clock period |
| 06/29/1993 | CA2002585C Demodulator with composite transversal equalizer and eye detection clock synchronizer |
| 06/24/1993 | WO1993012601A1 Timing and automatic frequency control of digital receiver using the cyclic properties of a non-linear operation |
| 06/23/1993 | EP0547373A1 A circuit and method for dual-tone multifrequency detection |
| 06/23/1993 | CN2137053Y Carrier modulation narrow pulse signal processor |
| 06/23/1993 | CN1021396C Local area network communication system |
| 06/22/1993 | US5222104 Gain control circuit for radio transmitter |
| 06/22/1993 | US5222103 Differential quadrature phase shift keying encoder for subcarrier systems |
| 06/22/1993 | US5222078 Data signal compensation apparatus for use in a receiver |
| 06/22/1993 | US5222077 Radix mapping with variable number of symbols in mapping period |
| 06/22/1993 | CA1319405C Frequency independent information transmission system |
| 06/16/1993 | EP0546719A1 I/Q modulator and demodulator |
| 06/16/1993 | EP0546614A1 Mobile radio receiver of which the initial synchronisation with a fixed station is improved by frequency estimation impulse recognition |
| 06/16/1993 | EP0546322A1 Quadrature modulator |
| 06/16/1993 | EP0546173A1 Tone receiver comprising a switch capacitor zero crossing detector. |
| 06/16/1993 | EP0305546B1 Digital demodulator apparatus |
| 06/15/1993 | US5220584 System for demodulation and synchronizing multiple tone waveforms |
| 06/15/1993 | US5220275 Accumulator phase digitizer |
| 06/14/1993 | WO1993012603A1 Frequency translation apparatus and method |
| 06/14/1993 | WO1993012578A1 Apparatus and method for direct phase digitizing |
| 06/10/1993 | WO1993011636A1 Telephone line picture transmission |
| 06/10/1993 | WO1993011623A1 Demodulation method using quadrature modulation |
| 06/10/1993 | WO1993011605A1 Digital demodulator for preamble-less burst communications |
| 06/10/1993 | WO1993011279A1 Electric power distribution system for active cathodic protection of reinforced concrete constructions |
| 06/10/1993 | WO1993004572A3 Coding of images and originals, for example for telefax and colour television |
| 06/09/1993 | EP0545783A1 Half-duplex modem for GSM radio telephone network |
| 06/09/1993 | EP0545581A2 Integrated data processing system including CPU core and parallel, independently operating DSP module |
| 06/09/1993 | EP0545546A2 Digital GMSK transceiver |
| 06/09/1993 | EP0545311A2 Electronic circuit readily capable of controlling extent of a radio communication zone |
| 06/09/1993 | EP0545245A2 Digital oscillator |
| 06/09/1993 | EP0544991A2 Method for the automatic classification of digitally modulated signals, and apparatus to carry out the method |
| 06/09/1993 | EP0544875A1 Apparatus for adjusting signal points, equalizer gains and the like |
| 06/09/1993 | EP0540664A4 Sawc phase-detection method and apparatus |
| 06/09/1993 | EP0511295A4 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions |
| 06/09/1993 | CN1021182C Frequency shift keying modulation and demodulation for serial communication on current loop |
| 06/08/1993 | US5218636 Dial pulse digit detector |
| 06/08/1993 | US5218187 Hand-held data capture system with interchangeable modules |
| 06/08/1993 | CA1318946C Multilevel quadrature amplitude modulator capable of reducing a maximum amplitude of a multilevel quadrature amplitude modulated signal regardless of transmission data informationof redundant information |
| 06/02/1993 | EP0544463A2 Coded modulation, with unequal error protection, for fading channels |
| 06/01/1993 | US5216697 Signal quality detector circuit |
| 06/01/1993 | US5216694 Trellis coding for fractional bits |
| 06/01/1993 | US5216391 MSK modulator having a digital quadrature reference waveform generator |
| 05/27/1993 | WO1993010612A1 Phase-modulation transmitter and receiver |
| 05/27/1993 | WO1993010611A1 Digital fsk demodulator |
| 05/27/1993 | WO1993010596A1 Digital demodulator |
| 05/27/1993 | DE4138175A1 Transmission of coded instruction from transmitter to receiver - generating third frequency for first code value, and different fourth frequency for second code value |
| 05/26/1993 | EP0543549A2 Data decoding device |
| 05/26/1993 | EP0542922A1 Reciprocal mode saw correlator method and apparatus |
| 05/26/1993 | EP0542894A1 Novel spread spectrum codec apparatus and method |