Reducing the Peak-to-Average Power Ratio of MC-CDMA Signal Using Polyphase Spreading Codes
基于多相扩频码的MC-CDMA信号峰平比抑制方法研究

Reducing the Peak-to-Average Power Ratio(PAPR) is one of the key technologies in MC-CDMA system. This paper derived the PAPR properties of MC-CDMA signal using orthogonal complementary spreading codes, constructed the polyphase spreading codes for MC-CDMA system using the polyphase pulse compression codes, and proved that they belonged to orthogonal complementary codes.The simulation results showed that under various modulation schemes,most polyphase pulse compression spreading codes could reduce PAPR when compared to traditional codes,especially under the multiple level modulation schemes and in different user number cases,polyphase spreading codes are good choices for MC-CDMA system.