摘要
针对OFDM信号功率降额问题,提出了一种新的子载波预留方法。该方法利用谷值补偿算法改善OFDM信号的立方度量性能,并使用动态峰值削减算法降低OFDM信号的峰均功率比,同时对原有迭代过程进行简化,合理地控制计算开销。仿真结果表明,与传统的功率降额处理方法相比,该方法可更为有效地降低系统峰均功率比和改善OFDM信号的立方度量性能。
A new tone reservation method which can solve the power de-rating problem of OFDM is proposed.This new method uses valley compensation algorithm to decrease the cubic metric and dynamic peak reduction algorithm to reduce the PAPR of OFDM signal.At the same time,the iterative algorithm is improved in order to reduce the computational cost.Simulation results show that this new method can decrease the PAPR and cubic metric effectively compared with the traditional power de-rating methods.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第12期129-132,共4页
Computer Engineering and Applications
关键词
正交频分复用(OFDM)
立方度量
峰均功率比
子载波预留
谷值补偿
动态峰值削减
Orthogonal Frequency Division Multiplexing（OFDM）
cubic metric
Peak to Average Power Ratio（PAPR）
tone reser-vation
valley compensation
dynamic peak reduction
