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 auto-correlation in the "Zero Interference Window". These excellent features of the technique help to eliminate interference and give better performance.