接收分集的移动OFDM系统

2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540) Pub Date : 2000-09-23 DOI:10.1109/WCNC.2000.903941

A. Hutter, J. Hammerschmidt, E. Carvalho, J. Cioffi

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引用次数: 40

摘要

研究了基于ofdm的宽带通信系统的接收分集问题。我们考虑使用多天线来对抗时间选择性衰落和OFDM传输，并结合适当的保护间隔来抑制码间干扰。接收分集方案位于频域，我们推导了不同的线性估计器，以下称为分集均衡器。我们证明了基于载波的最佳线性MMSE估计器的解决方案是众所周知的最大比率组合器(MRC)，它是最大化整体信噪比的最简单的解决方案。此外，我们对所提出的分集均衡器进行了性能分析，并将理论结果与使用信道状态信息进行MRC的模拟系统进行了比较。

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Receive diversity for mobile OFDM systems

We investigate receive diversity for OFDM-based broadband communication systems. We consider the use of multiple antennas to combat time-selective fading and OFDM transmission in combination with an appropriate guard interval to suppress intersymbol interference. The receive diversity scheme is located in the frequency-domain and we derive different linear estimators, hereafter referred to as diversity equalizers. We show that the carrier-based solution for the optimum linear MMSE estimator-which is the least complex solution that maximizes the overall SNR is the well known maximum ratio combiner (MRC). Furthermore, we present a performance analysis for the proposed diversity equalizers and compare theoretical results to a simulated system which uses channel state information for MRC.

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来源期刊

2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540)

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