In OFDM systems, when the channel response is longer than cyclic prefix (CP), intersymbol interference (ISI) will occur.The ISI can seriously degrade the performance of OFDM systems.

• 摘要:在正交分频多工系统中，当脉冲响应长度大于前置循环讯号的长度时，符元间的干扰就会产生而将严重地降低系统效能。