Signal extraction circuit and correlator utilizing the circuit

摘要

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.