ADAPTIVE SPREAD SPECTRUM RECEIVER

摘要

A sampling signal SPS of a received signal which is subjected to spectrum spreading is inputted to matching filters 121 to 124 and is compressed back. A spreading code of a desired wave is used as a compressing code in the filter 121, and a plurality of diffusion codes orthogonal to the spreading code of the desired wave and orthogonal to one another are used for compression in the filters 122 to 124. The outputs x1 to x4 of the filters 121 to 124 are multiplied by weighting coefficients w1 to w4, respectively, and the productions are linearly combined and outputted as a composite signal DCS. The signals x1 to x4 multiplied by the weighting coefficients w1 to w4 and the composite signal DCS are inputted to a coefficient control part 37, and the weighting coefficients w1 to w4 are determined by an algorithm which minimizes the mean power of the composite signal DCS under the restriction condition of these weighting coefficients w1 to w4.