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| Comparison of Selected Mapping and Partial Transmit Sequence for Crest Factor Reduction in OFDM | |||
| Baxley,Robert J. | Georgia Tech | ||
| Zhou,G. Tong | Georgia Tech | ||
| Selected mapping (SLM) and partial transmit sequence (PTS) are two existing distrotionless crest factor reduction (CFR) schemes that have been proposed for orthogonal frequency division multiplexing (OFDM). Previously, it was argued that SLM and PTS have comparable CFR 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 may be higher or lower than that of SLM, but that SLM always has better CFR performance. We chose to quantify the CFR performance through two metrics. One metric is related to the average power amplifier (PA) efficiency and the other is related to the average distortion noise. We then compare the performance of SLM and PTS using the two metrics for a given amount of computational complexity. We find that, all things considered, SLM beats PTS by a narrow margin. | |||
| Mr. Baxley received his B.S.E.E. degree in 2003 and his M.S.E.E. degree in 2005, both from Georgia Tech. He is currently working towards a Ph.D. in Electrical Engineering at Georgia Tech. In 2005, Mr. Baxley received the institute-wide Sigma Xi award for best M.S. thesis and he is a recipient of the National Science Foundation Graduate Research Fellowship. From May to August in 2005 and in 2006, he worked as a consulting research engineer for General Dynamics C4 Systems. His current research interests include communications theory, signal processing, and statistics. | |||