摘要
如何降低正交频分复用系统(OFDM)中的峰均功率比是有效应用OFDM技术的关键。本文基于部分传输序列(PTS),并针对部分传输序列过于繁重的计算量,提出了一种运用各采样点组相位相量信息的改进算法。新算法以较少的冗余度获得了比部分传输序列最优和方法更好的性能,减少了系统的计算复杂度。仿真结果表明新算法更好的降低了OFDM系统信号的峰均比。
How to reduce the PAR is the key to apply the OFDM technology efficiently. As high PAR reduction using PTS requires to introduce an additional vast complexity, we propose the improved algorithm employing the phase vector factor of samples as the side information of PTS. With less redundancy, new algorithm achieves better performance than the old PTS method, reduces the complexity of PTS-OFDM system effectively. The better statistics of peak power in the improved transmit signal are demonstrated by simulation results.
出处
《电路与系统学报》
CSCD
北大核心
2006年第4期100-103,共4页
Journal of Circuits and Systems
关键词
正交频分复用
峰值平均功率比
部分传输序列
子群
OFDM （Orthogonal Frequency Division Multiplexing）
PAR （Peak to Average power Ratio）
PTS （Partial Transmit Sequence）
subblock
