Comparing Selected Mapping and Partial Transmit Sequence for PAR Reduction
Comparing Selected Mapping and Partial Transmit Sequence for PAR Reduction
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DOI：
10.1109/tbc.2007.908335
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发表时间：
2007-11
影响因子：
4.5
通讯作者：
R. Baxley;G. Zhou
中科院分区：
文献类型：
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作者：
R. Baxley;G. Zhou
选择映射（SLM）和部分发射序列（PTS）是目前提出的两种用于正交频分复用（OFDM）的无失真峰均功率比（PAR）降低方案。以前，有人认为SLM和PTS具有相当的PAR降低性能，但后者具有较低的计算复杂性，因为它使用较少的ifft。在本文中，我们证明了PTS的总体计算复杂度仅在某些情况下低于SLM，并且SLM始终具有更好的PAR消减性能。我们使用三种不同的性能指标来比较这两种方案，假设可以提供给定的计算复杂性。通过使用这些指标，我们可以看到，对于给定的复杂性，SLM优于PTS。
Selected mapping (SLM) and partial transmit sequence (PTS) are two existing distortionless peak-to-average power ratio (PAR) reduction schemes that have been proposed for orthogonal frequency division multiplexing (OFDM). Previously, it was argued that SLM and PTS have comparable PAR reduction performance but that the latter has lower computational complexity because it uses fewer IFFTs. In this paper, we show that the overall computational complexity of PTS is only lower than that of SLM in certain cases, and that SLM always has better PAR reduction performance. We compare the two schemes using three different performance metrics by assuming a given amount of computational complexity that can be afforded. Using the metrics, we show that SLM outperforms PTS for a given amount of complexity.