Performance analysis of MIMO link under fading channels

2014 17th International Conference on Computer and Information Technology (ICCIT) Pub Date : 2014-12-01 DOI:10.1109/ICCITECHN.2014.7073080

Tahsina Hashem, M. Islam

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引用次数: 7

Abstract

In modern wireless communication, multiple-input multiple-output (MIMO) system plays an important role as it improves channel capacity, range and reliability without requiring any additional bandwidth or transmit power. This research presents a detailed analysis of capacity performance of MIMO systems under four fading cases i.e. Gaussian, Weibull, Rayleigh and Nakagami-m fading in the low signal-to-noise ratio (SNR) regime. We first derive analytical expressions for the expectation of the trace of the complex channel matrix. Then we measure the low-SNR performance of MIMO system under four fading conditions with respect to minimum normalized energy per information bit and wideband slope. Also a comparative analysis has been performed between the channel capacity of spatial-multiplexing (SM) MIMO and Orthogonal Space Time block coded (OSTBC) MIMO system. Simulation results show that performance of the system depends on different criteria of MIMO fading channels. According to the capacity performance of MIMO system, four fading channels can be ordered as Gaussian, Nakagami-m, Rayleigh and Weibull fading channels respectively.

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衰落信道下MIMO链路性能分析

在现代无线通信中，多输入多输出(MIMO)系统在不需要额外带宽或发射功率的情况下提高信道容量、覆盖范围和可靠性，发挥着重要作用。本文详细分析了在低信噪比(SNR)条件下，MIMO系统在高斯衰落、威布尔衰落、瑞利衰落和中川衰落四种衰落情况下的容量性能。我们首先推导了复信道矩阵轨迹期望的解析表达式。然后，我们测量了四种衰落条件下MIMO系统的低信噪比性能，包括最小归一化能量每信息位和宽带斜率。并对空间复用(SM) MIMO和正交空时块编码(OSTBC) MIMO系统的信道容量进行了比较分析。仿真结果表明，系统的性能取决于MIMO衰落信道的不同准则。根据MIMO系统的容量性能，可以将4个衰落信道分别排序为高斯衰落信道、中神衰落信道、瑞利衰落信道和威布尔衰落信道。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2014 17th International Conference on Computer and Information Technology (ICCIT)

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