基于限幅的低峰均功率比的MC-CDMA系统

Clipping based MC-CDMA system with lower peak-to-average power ratio

针对MC-CDMA系统的上行链路存在的峰均功率比问题,提出了一种降低峰均功率比的新的系统解决方案。该方案在系统的发射端利用限幅方式来有效降低峰均功率比,在接收端通过设计一种基于决策反馈的新型接收机来估计和抵消限幅噪声,从而恢复系统的误码率性能。仿真实验证明该系统能在降低峰均功率比的同时,仍具有良好的误码率性能。

For the high Peak-to-Average Power Ratio（PAPR） problem existing in OFDM based MC-CDMA system uplink,this paper proposes a new system scheme as a solution to PAPR.The new system reduces PAPR by clipping at the transmitter and estimates and cancels the clipping noise at a new designed receiver based on decision and feedback method,thus can restore the BER performance.The simulation demonstrates that the new system can maintain the good BER performance while lower the PAPR to an ideal level.