Abstract Spatial correlation is a crucial impairment for practical Multiple Input Multiple Output (MIMO) wireless communication systems. It is important to consider spatial correlation between antennas in actual communication scenario at both sides, i.e. transmit and receive side. Furthermore, we have considered nonorthogonal full rate STBC in MIMO systems equipped with four transmit antennas and four receive antennas in a quasi-static Rayleigh fading channel. In this paper, Bit Error Rate (BER) performance of full rate non-orthogonal Space Time Block code (STBC) is obtained using simulations in MIMO wireless communication systems. Spatial correlation is assumed between antennas at both the transmitter and the receiver sides. For this analysis, we have considered various transmit antenna spacing values of d t = 0.1π, 0.2π, and 0.4π keeping fixed d r = 0.1π and various receive antenna spacing values of d r = 0.1π, 0.2π, and 0.4π keeping fixed d t = 0.1π. The obtained results show that the transmitting diversity is more serious than the receiving diversity in the spatially correlated antenna environment for the specified signal-to-noise ratio. This study will be useful for actual wireless communication implementation where spatial correlation antennas are present in the practical environment of the MIMO wireless communication system.

中文翻译：

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空间相关 MIMO 系统中全速率非正交 STBC 的性能

摘要 空间相关性是实际多输入多输出（MIMO）无线通信系统的一个重要损害。在双方的实际通信场景中，即发射端和接收端，考虑天线之间的空间相关性是很重要的。此外，我们已经考虑了在准静态瑞利衰落信道中配备四个发射天线和四个接收天线的 MIMO 系统中的非正交全速率 STBC。在本文中，使用 MIMO 无线通信系统中的仿真获得了全速率非正交空时分组码 (STBC) 的误码率 (BER) 性能。假设发射机和接收机两侧的天线之间存在空间相关性。对于此分析，我们考虑了 dt = 0.1π、0.2π 和 0 的各种发射天线间距值。4π 保持固定 dr = 0.1π 和各种接收天线间距值 dr = 0.1π、0.2π 和 0.4π 保持固定 dt = 0.1π。获得的结果表明，对于指定的信噪比，在空间相关天线环境中，发射分集比接收分集更严重。本研究将有助于实际无线通信实施，其中空间相关天线存在于 MIMO 无线通信系统的实际环境中。