放大器非线性多天线系统中集群OFDM与天线交错OFDM的比较

2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04. Pub Date : 2004-12-11 DOI:10.1109/SPCOM.2004.1458367

F. Gregorio, T. Laakso, R. Wichman

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引用次数: 5

摘要

发射功率要求是未来无线正交频分复用(OFDM)系统的关键问题之一。分集技术应用于OFDM系统有助于减少功率放大器产生的非线性效应。在非线性功率放大器条件下，研究了低峰均功率比(PAPR)聚类OFDM (COFDM)和天线交错OFDM (AIOFDM)技术在无线局域网系统中的应用。研究表明，在受放大器非线性影响的衰落信道中，采用天线交错OFDM获得的误码率比采用聚类OFDM和传统OFDM获得的误码率低。这些低PAPR技术的实现有助于减少功率放大器的线性限制，提高功率效率。功率放大器的效率在移动系统中是至关重要的，因为它对电池的充电寿命有重要影响。

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Comparison of clustered and antenna interleaving OFDM in multiple-antenna systems with amplifier nonlinearities

The transmit power requirements are one of the key issues in future wireless orthogonal frequency division multiplexing (OFDM) systems. Diversity techniques applied in OFDM systems help to reduce nonlinear effects produced by the power amplifier. In this paper, low peak to average power ratio (PAPR) techniques clustered OFDM (COFDM) and antenna interleaving OFDM (AIOFDM) applied in a wireless LAN systems are evaluated under nonlinear power amplifier. This paper shows that the bit error rate (BER) obtained using antenna interleaving OFDM is lower compared to the BER obtained applying clustered OFDM and conventional OFDM in fading channels subject to amplifier nonlinearities. The implementation of these low PAPR techniques can help to reduce the power amplifier linearity restrictions increasing the power efficiency. Power amplifier efficiency is crucial in mobile systems since it has a dominant effect on the battery charge life.

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2004 International Conference on Signal Processing and Communications, 2004. SPCOM '04.

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