摘要
针对FH-OFDM信号的峰均比(PAPR)问题,提出一种DCT-ACE联合优化抑制PAPR方法,该方法在频域将离散余弦变换与传统动态星座图扩展法相融合,利用DCT矩阵正交去相关性的特点,降低大峰值信号出现的概率,进而达到抑制PAPR的目的。仿真结果表明,与传统ACE算法相比,在相同迭代次数条件下DCT-ACE联合优化方法可对PAPR改善1.2dB;与传统DCT算法相比,DCT-ACE联合优化方法可对PAPR改善0.5dB且收敛速度快。研究结果可适应通信系统抑制PAPR的时效性要求,具有一定的理论指导意义。
Aiming at the PAPR of FH-OFDM signals, a DCT-ACE joint optimization method for suppressing the PAPR is proposed. This method combines the discrete cosine transform with the traditional dynamic constellation expansion method in the frequency domain, and uses the DCT matrix to orthogonalize it. The characteristics of correlation effectively reduce the probability of large peak signals, and then achieve the purpose of suppressing the PAPR. The simulation results show that, compared with the traditional ACE algorithm, the DCT-ACE joint optimization method can reduce the PAPR by 1.2 dB under the same number of iterations;compared with the traditional DCT algorithm, the DCT-ACE joint optimization method can reduce the PAPR,the decline is 0.5 dB and the convergence speed is high. The research results can be adapted to the timeliness requirements of the communication system to suppress the PAPR,and have certain theoretical guiding significance.
作者
周帆
田秉禾
刘博
姜月秋
ZHOU Fan;TIAN Binghe;LIU Bo;JANG Yueqiu(Shenyang Ligong University,Shenyang 110159,China)
出处
《沈阳理工大学学报》
CAS
2021年第1期72-76,94,共6页
Journal of Shenyang Ligong University
基金
辽宁省教育厅项目(LG201914)。
关键词
跳频
正交频分复用
峰均比
frequency hopping
orthogonal frequency division multiplexing
peak to average power ratio
