Patent ID: 7313173
Filing Date: 2007-12-25
Classification: H04B

Abstract:
1. A correlation detection apparatus that detects a correlation between a reception signal and a spreading code, comprising: a spreading code generator configured to generate a spreading code sequence; a delay configured to delay the spreading code sequence by at least one chip interval; and a convertor configured to generate a converted spreading code sequence based on the spreading code sequence and the delayed spreading code sequence, wherein the converted spreading code sequence includes an offset unit of one-half chip according to a combination value of chips next to each other in the spreading code sequence, wherein the convertor comprises a two-three value convertor configured to generate said converted spreading code sequence of an offset unit of ½ chip by converting the spreading code sequence, which includes two values of “+1” and “−1”, into the converted spreading code sequence, which includes three values of “+1”, “−1” and “0”, wherein the two-three value convertor outputs a “0” when chips next to each other are not similar, outputs a “+1” when chips next to each other are of a value “+1”, and outputs a “−1” when chips next to each other are of a value “−1”.