Spreading code generation circuit and demodulation circuit

Details Spreading code generation circuit and demodulation circuit Spreading code generation circuit and demodulation circuit

2006-09-19

2006-09-19

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C370S342000, C370S347000

Reexamination Certificate

active

07110441

ABSTRACT:
The present invention provides a spreading code generation circuit and demodulation circuit capable of maintaining reception characteristic of a receiver in a preferable condition, and a grand phase control in a short time, and eliminating necessity of monitoring the phase control amount.According to a plurality of types of control signals output according to change of synchronization timing of the reception base band signal, a spreading code generation circuit performs phase control on sample time or symbol time or slot time basis for generating a spreading code.

REFERENCES:
patent: 5459763 (1995-10-01), Hori et al.
patent: 5610940 (1997-03-01), Durrant et al.
patent: 5960028 (1999-09-01), Okamoto et al.
patent: 2001/0024474 (2001-09-01), Rakib et al.
patent: 2002/0034215 (2002-03-01), Inoue et al.

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