Correlation circuit for spread spectrum communication

Details Correlation circuit for spread spectrum communication Correlation circuit for spread spectrum communication

2005-05-10

2005-05-10

Ghebretinsae, Temesghen (Department: 2637)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S142000, C375S343000

Reexamination Certificate

active

06891885

ABSTRACT:
There is disclosed a correlation circuit for spread spectrum communication, which can demodulate users having superposed demodulation phases and equaling or exceeding a sum of products calculation processing ability without enlarging a constitution. When a plurality of users more than a specified number exist in the same phase of the input signal from a memory, a controller controls a transfer speed of a shift of one sample in an input signal register in order to hold a sufficient time for completing calculation of a sum of products with all the plurality of users in a sum of products calculator in the correlation circuit for spread spectrum communication.

REFERENCES:
patent: 6130906 (2000-10-01), Davidovici et al.
patent: 6647056 (2003-11-01), Imaizumi et al.
patent: 6678313 (2004-01-01), Imaizumi et al.
patent: 0936748 (1999-08-01), None
patent: 2323749 (1998-09-01), None
patent: 2000-196499 (2000-07-01), None

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