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arXiv 1002.0406cs.ITmath.IT
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具有剩余传输RF损伤的MIMO传输

MIMO Transmission with Residual Transmit-RF Impairments

Christoph Studer, Markus Wenk, Andreas Burg

摘要:

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,我们研究的信道容量和错误率性能的残余Tx-RF损伤,无视适当的补偿的效果。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。高斯模型的失真所造成的这些损害。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)。

英文摘要:

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).

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