Patent ID: 6973119

Claim:
A method for recognizing a valid receiving path for demodulating received signals out of a plurality of receiving paths in a CDMA wireless telecommunication system, comprising the steps of: receiving at least one set of signals through a transmission path, said set of signals including a predetermined number of received signals; generating at least two spread codes each of which has its own delay time, said spread codes including a predetermined number of spread code bits; calculating at least two correlation values of said set of signals with said at least two spread codes, one of said at least two correlation values being a peak correlation value; forming a path waveform of said path according to a correlation profile based on said at least two correlation values; comparing said at least two correlation values with a predetermined noise threshold value; recognizing said path as a noise when one of said at least two correlation values is smaller than said predetermined noise threshold value; comparing said peak correlation value with a predetermined path recognition threshold value; determining whether there is a distortion on said path waveform according to a correlation profile based on a ratio of said peak correlation value to at least one of said at least two correlation values other than said peak correlation value; and recognizing said path as a valid receiving path for demodulating said received signals based on the results of determination of said determining step.