OFDM基于子载波相移的低复杂度PTS方法  

Subcarrier phase shift based low complexity PTS method for OFDM

作　　者：刘鹏成 徐湛[1] LIU Pengcheng;XU Zhan(School of Information and Communication Engineering,Beijing Information Science&Technology University,Beijing 100101,China;Beijing Simpleware Technology Co.,Ltd.,Beijing 100190,China)

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101 [2]北京西普阳光教育科技股份有限公司,北京100190

出　　处：《现代电子技术》2018年第17期15-19,24,共6页Modern Electronics Technique

摘　　要：正交频分复用(OFDM)是一种多载波技术,但其信号存在较高的峰均比(PAPR)问题,通过发送端功率放大器时需要较高的线性工作范围。研究一种新的低复杂度部分传输序列(PTS)峰均比抑制方法,该方法在时域对不同分组子载波相移,寻找低PAPR的OFDM信号传输。通过传递少量相移信息,可以在接收端对基带信号逆向移位操作恢复原始基带信号。仿真结果表明,所提方法在低复杂度下可以有效降低PAPR,同时保持较好的误比特率性能。The orthogonal frequency division multiplexing(OFDM)is a kind of multicarrier technique.Its signal has high peak-to-average power ratio(PAPR),so it requires higher linear operating range while transmitting through the power amplifier of transmitter.A new kind of partial transmit sequence(PTS)PAPR suppression method with low complexity is proposed,with which the phase shift of the different grouped subcarriers is permormed in the time domain to find the OFDM signal transmission with low PAPR.By transferring a small amount of phase shift information,the reverse shift operation is carried out for the baseband signal in the receiving terminal to restore to the original baseband signal.The simulation results show that the proposed method can effectively reduce the PAPR in low complexity while maintaining the perfect bit error rate performance.

关 键 词：OFDM 多载波技术 PAPR PTS 峰均比抑制 子载波相移 

分 类 号：TN919.3-34[电子电信—通信与信息系统]