摘要
较高的峰均功率长期以来都是OFDM技术的主要缺点。本文针对OFDM技术的这一问题提出了一种部分位移映射方法来降低OFDM的峰值功率。该方法通过利用离散的傅里叶变换,产生一组不用复杂乘法运算的候选信号,并从中选择一个峰值功率最小的信号进行传输。该篇文章通过仿真分析证明了部分位移映射算法与以前的提出的算法(如,选择性映射、部分发送序列等)相比可以有效的降低峰值功率的同时,降低了算法复杂度。
The high peak-to-average power is one of the main drawbacks in OFDM systems. This letter proposes a partial shift mapping （PSM） method for peak power reduction in OFDM systems. By utilizing the properties of the discrete Fourier transform, the proposed method generates a set of candidate signals without additional complex multiplication and selects the one with minimum peak power for transmission. Analyses and simulations confirm that the PSM method achieves satisfactory peak power reduction performance and low complexity compared with other kindred methods, for example, selected mapping and partial transmit sequences.
出处
《电子设计工程》
2015年第17期94-96,100,共4页
Electronic Design Engineering
