Patent ID: 6631173
Filing Date: 2003-10-07
Classification: H04B

Abstract:
A method for calculating correlation between a first and a second code sequence, which are previously known code sequences used in telecommunications systems, each code sequence including a number of samples and having a finite length, the method comprising:calculating a delay between the code sequences; setting the code sequences to a desired phase with respect to each other based on the delay between the code sequences by rotating the first code sequence; calculating the correlation between the set-to-the-desired-phase code sequences using a single correlator, which compares the set-to-the-desired-phase code sequences with each other in parallel mode sample by sample, and by adding the results of sample-specific comparisons together, wherein the samples of the code sequences are binary symbols, and the set-to-the-desired-phase code sequences are compared with each other by calculating a number of deviations of the samples in the same position and by subtracting the number of deviations multiplied by two from a size of a correlation area.