The cross correlation of pixels between two frames regarding background interframe continuity and foreground discontinuity is also computed. 同时，基于背景的帧间连续性和前景的不连续性，计算像素帧间的互相关系数。
However, different relative delay between users results in distinct partial correlation coefficients thus bringing about distinct performance of multiuser detectors. 然而，异步用户间不同的相对时延将引起不等的部分互相关系数，从而也导致不一样的多用户检测性能。
