Patent ID: 8855173

Claim:
A method of acquiring a satellite signal, comprising: calculating a correlation result of a reception signal from a satellite and a replica code using a first output value of a first adder-subtractor and a second output value of a second adder-subtractor, the first adder-subtractor being an adder-subtractor for a combination of addition and subtraction corresponding to time-series change in code values of the replica code among a first set of adder-subtractors for addition-subtraction of a first portion of sampling values obtained by sampling the reception signal in a time series with different combinations of addition and subtraction, and the second adder-subtractor being an adder-subtractor for a combination of addition and subtraction corresponding to time-series change in code values of the replica code among a second set of adder-subtractors for addition-subtraction of a second portion of the sampling values with different combinations of addition and subtraction, and acquiring the satellite signal of the satellite using the correlation result.