摘要
正交频分复用(OFDM)技术被认为是第四代移动通信系统的核心技术之一,但是该系统中的高峰平比(PAPR)问题一直是将该技术实用化的一大障碍。本文研究了利用信号扰码技术降低OFDM系统峰平比的一种典型算法:部分传输序列法(PTS),指出其适用的场合,提出了一种将随机分割子序列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很好的折衷。
OFDM（ orthogonal frequency division multiplexing）has been regarded as the core technology of 4G wireless communications system in the future,but the problem of high Peak-to-Average Power Ratio （PAPR） Of OFDM System is one of the main obstacles to limit applications of OFDM. This paper has studied a classical algorithm on reducing PAPR of OFDM system by using the technique of signal scrambling ： PTS（ partial transmit sequence）, and pointed that the applicated occasion for this method. A method-iterative shifting linear-searching based on random sub-block division has been proposed. The result of simulation shows that this improved PTS method achieved a good compromise between PAPR performance and computation complexity.
出处
《信号处理》
CSCD
北大核心
2006年第6期909-911,共3页
Journal of Signal Processing
