一种降低OFDM信号峰均比的改进PTS算法
首发时间:2009-04-07
摘要:部分传输序列(PTS)是一种有效降低正交频分复用(OFDM)信号峰均比(PAPR)的方法,但是传统的PTS技术需要对所有的相移因子组合进行穷尽搜索,计算复杂度随着分块数的增加成指数增长,在实际应用系统中难以实现。本文提出了一种改进的PTS算法,用改进的邻域搜索算法(Modified Neighborhood Search)对PTS相移因子组合进行搜索。经仿真结果表明,与传统PTS算法比较,该改进算法性能只有较小的降低,但有效降低了PTS算法的复杂度.
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PAPR Reduction of OFDM Signals Using Modified Partial Transmit
Abstract:Partial transmit sequences (PTS) is an effective technique to reduce the pear-to-average power ratio (PAPR) of orthogonal frequency division multiplexing signals. However, the conventional PTS technique requires an exhaustive searching over all the combinations of the given phase factors, which results in the computational complexity increases exponentially with the number of the sub-blocks, so it is difficult to achieve in practical system. This paper proposed a novel scheme which searches the combination of phase factor by means of a modified neighborhood search method. Simulation results show that this scheme can greatly reduce the complexity with a little degradation of system’s performance.
Keywords: OFDM PAPR Neighborhood Search
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No.3112223267212390****
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