A receiver design for MIMO systems over rayleigh fading channels with correlated impulse noise
A receiver design for MIMO systems over rayleigh fading channels with correlated impulse noise
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DOI：
10.1109/glocom.2012.6503489
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发表时间：
2012-12
期刊：
影响因子：
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通讯作者：
Khodr A. Saaifan;W. Henkel
中科院分区：
文献类型：
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作者：
Khodr A. Saaifan;W. Henkel
众所周知，米德尔顿 A 类 (MCA) 密度可用于模拟脉冲干扰。该模型针对多个接收天线的统计物理扩展目前仅限于两个天线。单变量 MCA 模型的代数扩展导致多元 MCA 分布，可用于任意数量的接收天线。由于最近的研究表明多个无线系统中存在显着的噪声相关性，因此我们开发了用于存在空间相关 MCA 干扰的瑞利衰落信道的 MEMO 接收器。我们推导出正交空时分组码 (OSTBC) 的上限成对错误概率 (PEP)。我们表明，OSTBC 的性能改进高度依赖于脉冲噪声环境，并且随着发射和接收天线数量的增加，性能改进变得较小。在MEMO接收器的设计中，最大似然（ML）检测具有较高的计算复杂度。由于 MCA 模型可以看作是基于噪声状态知识的多元高斯分布，因此我们引入了一种简单的方法来估计接收器处的噪声状态，从而降低了 ML 决策规则的复杂性。
A Middleton Class-A (MCA) density is well known to model impulsive interference. The statistical-physical extension of this model for multiple receive antennas is currently limited to two antennas. An algebraic extension of the univariate MCA model leads to a multivariate MCA distribution, which can be used for an arbitrary number of receive antennas. Since recent studies show a significant level of noise correlation in several wireless systems, we develop MEMO receivers for Rayleigh fading channels in the presence of spatially correlated MCA interference. We derive an upper bound pairwise error probability (PEP) for orthogonal space time block codes (OSTBCs). We show that the performance improvement of OSTBCs is highly dependent on the impulse noise environment and it becomes minor as the number of transmit and receive antennas increases. In the design of MEMO receivers, the maximum likelihood (ML) detection has a high computational complexity. Since the MCA model can be seen as a multivariate Gaussian distribution conditioned on the knowledge of noise state, we introduce a simple approach to estimate the state of noise at the receiver, which subsequently reduces the complexity of the ML decision rule.