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Class Information
Number: 375/362
Name: Pulse or digital communications > Synchronizers > Frequency or phase control using synchronizing signal
Description: Subject matter which uses the transmission and ultimate reception and separation of a special synchronizing signal interleaved with the incoming information signal.










Sub-classes under this class:

Class Number Class Name Patents
375/369 Start - stop 147
375/363 Synchronization bit insertion into artificially created gaps 195
375/364 Synchronization signals with unique amplitude, polarity, length, or frequency 415
375/365 Synchronization word 604


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
5692016 Process and arrangement for adjusting the local oscillators of a receiver in a multi-channel transmission system Nov. 25, 1997
5680596 Data transfer apparatus with automatic transmission rate adjustment Oct. 21, 1997
5677908 Hand-over method for mobile communication Oct. 14, 1997
5675284 Frequency lock indicator for FPLL demodulated signal having a pilot Oct. 7, 1997
5673133 Phase synchronization system Sep. 30, 1997
5659545 Apparatus for mobile unit acquisition in a satellite communication system and method therefor Aug. 19, 1997
5627863 Frame synchronization in multicarrier transmission systems May. 6, 1997
5627864 Phase shift correcting apparatus of a sync detector in a satellite broadcasting reception system May. 6, 1997
5625651 Discrete multi-tone data transmission system using an overhead bus for synchronizing multiple remote units Apr. 29, 1997
5623522 Asynchronous serial data receiving device Apr. 22, 1997
5602835 OFDM synchronization demodulation circuit Feb. 11, 1997
5598446 Clock extraction of a clock signal using rising and falling edges of a received transmission signal Jan. 28, 1997
5592507 Intermediate relay station of a digital microwave communication system using service channel for monitoring and controlling space and/or time diversity, heterodyne relay, phase control, freque Jan. 7, 1997
5574757 Phase-locked loop circuit having a timing holdover function Nov. 12, 1996
5570393 Digital audio signal demodulator Oct. 29, 1996
5568488 Pointer re-setting method and apparatus thereof Oct. 22, 1996
5555247 Frame synchronizing apparatus for quadrature modulation data communication radio receiver Sep. 10, 1996
5550812 System for broadcasting and receiving digital data, receiver and transmitter for use in such system Aug. 27, 1996
5548621 Data instrumentation system having circuitry for resolving multiple asynchronous state inputs Aug. 20, 1996
5528637 Synchronizing circuit Jun. 18, 1996
5526380 First-order loop control configuration for a phase-rotator based clock synchronization circuit Jun. 11, 1996
5522048 Low-power area-efficient and robust asynchronous-to-synchronous interface May. 28, 1996
5519734 Synchronization arrangement for decoder-de-interleaver May. 21, 1996
5519444 Phase synchronizing loop apparatus for digital audio signals May. 21, 1996
5512851 Circuit synchronization when switching between multiple clock signals using a variable advance controller Apr. 30, 1996
5500757 Optical receiving system Mar. 19, 1996
5495470 Alarm correlation system for a telephone network Feb. 27, 1996
5491728 Cell resequencing system for a telecommunication network Feb. 13, 1996
5488639 Parallel multistage synchronization method and apparatus Jan. 30, 1996
5475684 Time-division multiplex communication transmission apparatus Dec. 12, 1995
5459753 Method and apparatus for pattern independent phase detection and timing recovery Oct. 17, 1995
5457713 Spread spectrum alignment repositioning method Oct. 10, 1995
5444697 Method and apparatus for frame synchronization in mobile OFDM data communication Aug. 22, 1995
5442658 Synchronization apparatus for a synchronous data processing system Aug. 15, 1995
5440265 Differential/coherent digital demodulator operating at multiple symbol points Aug. 8, 1995
5440313 GPS synchronized frequency/time source Aug. 8, 1995
5440267 Demodulator Aug. 8, 1995
5438591 Quadrature amplitude modulation type digital radio communication device and method for preventing abnormal synchronization in demodulation system Aug. 1, 1995
5436927 Method and apparatus for testing frequency symmetry of digital signals Jul. 25, 1995
5430772 Bit synchronizer for NRZ data Jul. 4, 1995
5428647 Method and apparatus for synchronizing a received signal in a digital radio communication system Jun. 27, 1995
5426633 System for processing synchronization signals with phase synchronization in a mobile communication network Jun. 20, 1995
5422917 Frequency offset estimation using the phase rotation of channel estimates Jun. 6, 1995
5396497 Synchronization of audio/video information Mar. 7, 1995
5390216 Synchronization method for a mobile radiotelephone Feb. 14, 1995
5383188 Receiver having clock phase memory for receiving short preamble time slots Jan. 17, 1995
5363438 Selective ringing receiving device and method Nov. 8, 1994
5361276 All digital maximum likelihood based spread spectrum receiver Nov. 1, 1994
5359630 Method and apparatus for realignment of synchronous data Oct. 25, 1994
5357545 Synchronizing signal detecting circuit Oct. 18, 1994

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