Interference Free Window (IFW) in Las Cdma System and Comparison with Traditional CDMA

Large area synchronous code-division multiple access (LAS-CDMA) is a proposed fourth generation cellular standard. The feature that distinguishes LAS-CDMA from traditional CDMA is the new set of codes used to separate users. LAS code has zero cross-correlation in the “Zero Interference Window” and has only an impulse autocorrelation in the “Zero Interference Window”. These excellent features of the technique help to eliminate interference and give better performance.