Adaptive data recovery for spread spectrum systems

Details Adaptive data recovery for spread spectrum systems Adaptive data recovery for spread spectrum systems

1994-01-06

1994-12-27

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

H04L 2730

Patent

active

053772270

ABSTRACT:
A method and means for for recovering data in a spread spectrum communications system. The present invention includes a method and means for providing a sync window time period. The sync window is set to encompass the correlation values which are generated one baud time from the previous recovered data bit. The present invention also determines the peak correlation value within the sync window and the location in time within the sync window that the peak correlation value occurs. The present invention also provides a polarity window time period. The polarity window occurs during the sync window. The present invention decodes the data according to the direction of the peak correlation and whether the peak occurred within the polarity window. The sync and polarity windows are then set to occur, such that the peak correlation of the next baud falls within the next instance of the sync window. In this way, data can be recovered continuously.

REFERENCES:
patent: 4112372 (1978-09-01), Holmes et al.
patent: 4694467 (1987-09-01), Mui
patent: 4979183 (1990-12-01), Cowart
patent: 5090024 (1992-02-01), Vander Mey et al.
patent: 5289498 (1994-02-01), Hurlbut et al.

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