OFDM系统的峰值平均功率比降低

International Conference on Information Communication and Embedded Systems (ICICES2014) Pub Date : 2014-02-01 DOI:10.1109/ICICES.2014.7034004

T. Gayathri, K. Bavithra

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引用次数: 6

摘要

正交频分复用(OFDM)是一种适用于高数据速率通信的调制技术。但OFDM的主要缺点是其峰值平均功率比(PAPR)高，这可能导致发射机侧功率放大器的非线性失真。基于选择映射(SLM)的方案有效地降低了OFDM系统的PAPR。然而，它们需要侧信息(SI)传输，这不仅增加了系统复杂性，而且还损失了数据吞吐量。提出了一种低复杂度数据解码的SI检测方法。仿真结果表明，该方法的误码率性能与简化的最大似然数据解码方案相当，而计算复杂度接近基于嵌入式SI的数据解码方案。

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Peak to average power ratio reduction of OFDM system

Orthogonal frequency division multiplexing (OFDM) is a modulation technique that is suitable for high data rate communication. But the main drawback of OFDM is its high peak to average power ratio (PAPR), which can lead to nonlinear distortions in the power amplifiers at the transmitter side. Selected mapping (SLM) based schemes effectively reduce the PAPR of OFDM system. However they require side information (SI) transmission, which suffers a loss in the data throughput in addition to the increased system complexity. A novel SI detection method enabling low complexity data decoding is proposed. Simulation results of this proposed SI detection method shows the bit error rate performance comparable to that of the simplified maximum likelihood data decoding scheme while the computational complexity is close to that of the embedded SI based data decoding scheme.

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International Conference on Information Communication and Embedded Systems (ICICES2014)

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