MIMO transmission with residual transmit-RF impairments
MIMO transmission with residual transmit-RF impairments
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DOI：
10.1109/wsa.2010.5456453
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发表时间：
2010-02
期刊：
影响因子：
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通讯作者：
Christoph Studer;M. Wenk;A. Burg
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文献类型：
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作者：
Christoph Studer;M. Wenk;A. Burg
用于多输入多输出（MIMO）无线通信系统的物理收发器实现遭受发射RF（Tx-RF）损伤。在本文中，我们研究的影响信道容量和误码率性能的残余Tx-RF损伤，无视适当的补偿。特别是，我们证明了这种残留失真严重降低性能（近）最佳MIMO检测算法。为了减轻这种性能损失，我们提出了一个有效的算法，这是基于一个独立同分布。这些损伤引起的失真的高斯模型。为了验证这个模型，我们提供了测量结果的基础上的4流Tx-RF链实现MIMO正交频分复用（OFDM）。
Physical transceiver implementations for multiple-input multiple-output (MIMO) wireless communication systems suffer from transmit-RF (Tx-RF) impairments. In this paper, we study the effect on channel capacity and error-rate performance of residual Tx-RF impairments that defy proper compensation. In particular, we demonstrate that such residual distortions severely degrade the performance of (near-)optimum MIMO detection algorithms. To mitigate this performance loss, we propose an efficient algorithm, which is based on an i.i.d. Gaussian model for the distortion caused by these impairments. In order to validate this model, we provide measurement results based on a 4-stream Tx-RF chain implementation for MIMO orthogonal frequency-division multiplexing (OFDM).