Patent ID: 7277476

Claim:
A method for determining a correlation between samples of a code modulated signal received at a receiver and samples of at least one available replica code sequence, the samples of said received signal and of said at least one replica code sequence being aligned to each other, wherein positions of said samples in said received signal and in said at least one replica code sequence are grouped, each group comprising all positions at which composition of values of the samples of all of said at least one replica code sequence is similar, said method comprising: combining the values of the samples of said received signal which are associated by their positions to a respective group separately for each group to obtain a respective preliminary result; determining a correlation value for each of said at least one replica code sequence by combining obtained preliminary results for all groups separately for each of the at least one replica sequence taking into account the values of the samples of said at least one replica sequence in the respective group; and using said correlation value for each of said at least one replica code sequence to determine the correlation between each of said at least one replica code sequence and samples of said received signal.