Data reproducing apparatus for spread spectrum signal

Details Data reproducing apparatus for spread spectrum signal Data reproducing apparatus for spread spectrum signal

1996-02-06

1998-07-07

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375343, H04B 1500, H04K 100, H04L 2730

Patent

active

057780234

ABSTRACT:
The present invention aims to present a data reproducing apparatus for a spread spectrum signal which can synchronize quickly and accurately, using a low cost phase lock loop circuit, in spread spectrum communication. To achieve the object, a peak timing is detected from the output of a correlation circuit for despreading, the output of a correlation circuit exceeding a designated level during a bit rate period near which center the peak timing is put is integrated and data is reproduced according to the polarity of the integrated output signal. Thus, the influence of multi-path fading is reduced, synchronization is not needed in a spread band and TDD synchronization can be held quickly.

REFERENCES:
patent: 5151921 (1992-09-01), Hashimoto
patent: 5179573 (1993-01-01), Paradise
patent: 5323419 (1994-06-01), Mori et al.
patent: 5375141 (1994-12-01), Takahashi
patent: 5457713 (1995-10-01), Sanderford, Jr. et al.
patent: 5469470 (1995-11-01), Takahashi

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