Signal extraction circuit and correlator utilizing the circuit

Details Signal extraction circuit and correlator utilizing the circuit Signal extraction circuit and correlator utilizing the circuit

1997-04-02

1999-11-09

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375200, 375209, 370342, 370515, H04B 1500, H04K 100, H04L 2730

Patent

active

059828102

ABSTRACT:
A correlator used for spread spectrum communications which reduces consumed power. A signal extraction circuit (6) is provided for directly extracting phase information from an input signal which expresses two values of code data by each phase of a plurality of cycles. A signal transferring circuit (1) is connected to the signal extraction circuit (6) for transferring the phase information to a multiplying circuit (2) comprised of a plurality of multipliers. Signals in each cell of the signal transferring circuit (1) are multiplied by fixed coefficients within the multiplying circuit (2) and supplied to an adding circuit (3) for determination of a correlation peak value.

REFERENCES:
patent: 3715508 (1973-02-01), Blasbalg
patent: 4255791 (1981-03-01), Martin
patent: 5099495 (1992-03-01), Mikoshiba et al.
patent: 5619527 (1997-04-01), Kuroyanagi et al.
patent: 5677927 (1997-10-01), Fullerton et al.
patent: 5677930 (1997-10-01), Bottomley

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