摘要
为了降低部分传输序列法(PTS)峰值平均功率比(PAPR)抑制技术的复杂度,通过研究OFDM时域信号序列的最大峰值与部分传输序列相应位置峰值(包括最大峰值和次峰值)之间的关联性,提出一种在相位旋转因子优化过程中利用抽样序列替代部分传输序列的简化方法,并给出两种可行的抽样策略.由部分传输序列峰值点样值所构造的PTS抽样序列具有较少的样值数目,因此可以极大地降低PTS优化处理过程的计算复杂度.仿真结果表明,与未经抽样的PTS方法相比,新方法仅有微弱的性能损失.
In order to reduce the complexity of partial transmit sequence(PTS) technique used for peak-to-average power ratio(PAPR) reduction,based on the analysis of the relationship between the largest peak of orthogonal frequency division multiplexing(OFDM) sequence and the peaks(including the largest peak and sub-peaks) of partial transmit sequences,a low-complexity PTS was presented,which used PTS sampling sequences instead of partial transmit ones in the optimizing process of phase factor sequence.Two feasible sampling schemes were also provided to realize the PAPR reduction method.The PTS sampling sequences have fewer samples,so that the new method can achieve low complexity.Simulation results show that compared with original PTS,the new method just has a tiny PAPR reduction performance loss.
出处
《江苏大学学报(自然科学版)》
EI
CAS
北大核心
2010年第5期576-580,共5页
Journal of Jiangsu University:Natural Science Edition
基金
国家"863"计划项目(2003AA1Z1210)
关键词
多载波调制
正交频分复用
信号处理
优化
算法复杂度
multicarrier modulation
OFDM
signal processing
optimization
computational complexity