METHOD FOR GENERATING QUASI-ORTHOGONAL CODE AND SPREADER USING THE SAME IN MOBILE COMMUNICATION SYSTEM

摘要

A device for generating quasi-orthogonal codes which allow the minimuminterference with orthogonal codes in a mobilecommunication system using the orthogonal codes. The device includes a firstspreader for spreading at least one input signal withquasi-orthogonal codes, a second spreader for spreading another input signalwith Walsh codes, and a PN (Pseudo-Noise) spreader forcomplex-spreading output signals of the first and second spreaders with PNsequences. The quasi-orthogonal codes are characterized inthat a partial correlation value with the Walsh codes does not exceed a lowestpartial correlation limit value.