Method for establishing synchronization and demodulator using th

Details Method for establishing synchronization and demodulator using th Method for establishing synchronization and demodulator using th

1997-06-09

1999-11-30

Chin, Stephen

Pulse or digital communications

Synchronizers

325356, 325344, 325329, 325232, H04L 700

Patent

active

059955694

ABSTRACT:
A method for establishing synchronization and a data demodulator using the same. Clock and frame synchronization is established by a UW detector. Then, a .DELTA..omega. detector and a .DELTA..PHI. detector detect a frequency error and a phase error, respectively, from a unique word (UW) latched and held in memory so that frequency and phase synchronization is established in phase rotation by a complex rotator. That is, clock, fame, frequency, and phase synchronization are all established using a UW in the initial frame alone. This allows a receiver to establish the above synchronization at a high speed. Further, as a delay unit compensates a delay occurred in the processing by the .DELTA..omega. detector and the .DELTA..omega. detector, data loss is prevented.

REFERENCES:
patent: 4466108 (1984-08-01), Rhodes
patent: 5148276 (1992-09-01), Furumiya et al.
patent: 5463627 (1995-10-01), Matsuoka et al.
patent: 5475710 (1995-12-01), Ishizu et al.

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