具有峰值功率限制的OFDM-IDMA系统性能分析

2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications Pub Date : 2008-09-05 DOI:10.1109/ISSSTA.2008.109

Jun Tong, Qinghua Guo, Li Ping

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引用次数: 19

摘要

本文研究了频率选择衰落信道上的正交频分复用交错多址(OFDM- IDMA)系统。采用故意削波来降低每个用户发射信号的峰均功率比(PAPR)。提出了一种迭代多用户检测(MUD)技术，以弥补由于削波而造成的性能损失。提出了一种半解析式信噪比演化技术，可以快速准确地预测迭代MUD的性能。数值结果表明，OFDM-IDMA的性能对信道的频率选择性不敏感，并且比其他多载波传输技术具有更高的功率效率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance Analysis of OFDM-IDMA Systems with Peak-Power Limitation

This paper is concerned with orthogonal frequency- division multiplexing interleave-division multiple-access (OFDM- IDMA) systems over frequency-selective fading channels. Deliberate clipping is applied to reduce the peak-to-average power ratio (PAPR) of each user's transmitted signal. An iterative multiuser detection (MUD) technique is developed to recover the performance loss due to clipping. A semi-analytical signal-to- noise ratio (SNR) evolution technique is proposed, which can provide quick and accurate prediction of the iterative MUD performance. Numerical results show that the performance of OFDM-IDMA is not sensitive to the frequency selectivity of channels, and OFDM-IDMA is more power-efficient than other alternative multi-carrier transmission techniques.

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2008 IEEE 10th International Symposium on Spread Spectrum Techniques and Applications

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