DIFFUSION DEMODULATOR AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a diffusion demodulator by which an inverse spread output is obtained similarly to the case with the use of a multiplier without the need for the multiplier with a large circuit scale. SOLUTION: A complement-of-2 generator 2 generates data with an absolute value equal to each other but with a different sign with respect to a reception signal in advance to obtain a value equal to multiplication of '-1' by a multiplier. Since the reception signal itself is equal to a value multiplied with '1' but a multiplier, a selector 3 is used to select the reception signal or an output of the generator 2 depending on the value of the spread code so as to obtain an inverse spread output similarly to the case with using a multiplier even without the use of a multiplier having a large circuit scale.