Low-Complexity SLM and PTS Schemes for PAPR Reduction in OFDM Systems

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概要

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• One major drawback of orthogonal frequency-division multiplexing is the high peak-to-average power ratio (PAPR) of the output signal. The selected mapping (SLM) and partial transmit sequences (PTS) methods are two promising techniques for PAPR reduction. However, to generate a set of candidate signals, these techniques need a bank of inverse fast Fourier transforms (IFFTs) and thus require high computational complexity. In this paper, we propose two low-complexity multiplication-free conversion processes to replace the IFFTs in the SLM method, where each conversion process for an N-point IFFT involves only 3N complex additions. Using these proposed conversions, we develop several new SLM schemes and a combined SLM & PTS method, in which at least half of the IFFT blocks are reduced. Computer simulation results show that, compared to the conventional methods, these new schemes have approximately the same PAPR reduction performance under the same number of candidate signals for transmission selection.

• （社）電子情報通信学会の論文
• 2009-07-01

著者

• Wang Chin-liang

  Department Of Electrical Engineering And The Institute Of Communications Engineering National Tsing

• Ouyang Yuan

  Department Of Electrical Engineering Chang Gung University

• HSU Ming-Yen

  Realtek Semiconductor Corporation

関連論文

• Self-Calibration of a Phase-Shifting Adapter for Fizeau Interferometers
• Low-Complexity SLM and PTS Schemes for PAPR Reduction in OFDM Systems
• A New Carrier Recovery Loop for High-Order Quadrature Amplitude Modulation(Transmission Systems and Transmission Equipment for Communications)

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