Patent ID: 8107513

Claim:
A detection unit for detecting data symbols which are contained in a differentially demodulated signal and to which transmit-side in each case a pseudo noise (PN) sequence from a sequence set is assigned, which has a first group of first PN sequences and a second group of second PN sequences, whereby the first and second PN sequences within their respective group differ from one another only by a cyclic shift in their chip values and whereby the second group for each first PN sequence has a corresponding second PN sequence, which differs from the first PN sequence only by an inversion of each second chip value, comprising: a) a sequence providing unit, which is formed to provide a third group of derived sequences, the sequence providing unit having a counting unit and multiplexers connected to the counting unit, whereby fixed values are applied at the inputs of the multiplexers and the sequence providing unit is formed to provide the derived sequences of the third group at the outputs of the multiplexers; whereby the third group for each first PN sequence has a derived sequence, which is assigned to said first PN sequence and is derived therefrom by means of logic operations, but is not identical thereto; and whereby the derived sequences of the third group differ from one another only by a cyclic shift in their chip values; b) a correlation unit which is connected to the sequence providing unit and is formed to calculate correlation results by correlating the differentially demodulated signal with each derived sequence of the third group; and c) an evaluation unit which is connected to the correlation unit and is formed to derive the values of the data symbols by evaluating the correlation results.