摘要
正交频分复用(OFDM)系统的一个主要缺点是信号的峰值功率与平均功率比(PAPR)很高。本文研究了利用信号扰码技术降低OFDM系统峰均比的一种典型算法:部分传输序列法(PTS),提出了一种将随机分割方法、交织分割方法与迭代移位搜索加权因子相结合的改进PTS算法。仿真结果表明,改进后的算法在改善PAPR性能和计算的复杂度之间取得了较好的折衷。
One of major drawbacks of OFDM system is its large Peak to Average Power Ratio （PAPR） of transmitted signal. This paper studies a classical algorithm on reducing PAPR of OFDM system by using the technique of signal scrambling： Partial Transmit Sequence （PTS）, and proposes an improved method combining random division, interleaved partition and iterative shifting linear searching. The results of simulation show that this improved PTS method achieves a good compromise between PAPR performance and computation complexity.
出处
《信息通信技术》
2008年第3期59-63,共5页
Information and communications Technologies
基金
"新世纪优秀人才支持计划"资助
863专项课题资助
编号:2007AA01Z434
