Patent ID: 8737193

Claim:
A method for despreading a spread data signal (DS), which has been spread by means of a spreading sequence (S), comprising the following steps: a) forming a time-reversed spread data signal (DSRev) from the spread data signal (DS); b) forming the complementary spread data signal (DS′) from the spread data signal (DS), and forming the complementary time-reversed spread data signal (DSRev′) from the time-reversed data signal through alternating multiplication of the chips of the sequence by +1 and −1; c) correlating the spread data signals (DS) with the spreading sequence (S), correlating the time-reversed spread data signal (DSRev) with the time-reversed spreading sequence (SRev), correlating the complementary spread data signal (DS′) with the complementary spreading sequence (S′), and correlating the complementary time-reversed spread data signal (DSRev′) with the complementary time-reversed spreading sequence (SRev′); and d) summing the four correlations from Step c).