I/Q不平衡下放大前向继电器的EVM分析

2014 IEEE 11th Consumer Communications and Networking Conference (CCNC) Pub Date : 2014-07-28 DOI:10.1109/CCNC.2014.6866618

M. Mokhtar, Ahmad Gomaa, N. Al-Dhahir

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引用次数: 0

摘要

分析了在I/Q不平衡情况下，基于ofdm的中继辅助放大转发系统的EVM性能。我们分析表明，由于图像子载波之间的相互干扰，MRC检测器遭受误差层。我们分析地证明了一个简单的强制零分路每子载波均衡器消除了这个误差层。仿真结果表明，在不同的I/Q不平衡水平、信噪比水平和继电器位置下，它比MRC检测具有显著的性能增益。

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EVM analysis of amplify-and-forward relaying under I/Q imbalance

We analyze the EVM performance of OFDM-based relay-assisted amplify-and-forward systems in the presence of I/Q imbalance. We show analytically that the MRC detector suffers from an error floor due to mutual interference between image subcarriers. We prove analytically that a simple zero-forcing two-tap per subcarrier equalizer eliminates this error floor. Simulation results demonstrate its significant performance gain over MRC detection for different I/Q imbalance levels, SNR levels, and relay positions.

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2014 IEEE 11th Consumer Communications and Networking Conference (CCNC)

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