毫米波MIMO系统中的子天线阵列预编码算法研究

发布时间：2018-06-02 01:51

本文选题：毫米波 + MIMO　；参考：《电视技术》2017年01期

【摘要】：在第五代无线通信技术的研究中,毫米波通信凭借着巨大的信道容量优势,得到了很多的关注和研究。而将毫米波通信技术应用到目前已经广泛使用的MIMO无线通信系统中,则可以更大幅度地增加信道容量。大天线阵列的应用,可以很好地缓解毫米波系统难以避免的路径损耗问题,但同时也增加了数字预编码器的硬件复杂度。为了简化复杂度,使用了一种子天线阵列的结构来替代全天线阵列结构,并同时在数字域和模拟域上来完成整个系统的预编码,进而提出了一种改进型的混合预编码算法,通过将复杂的信道容量求解问题分解为若干独立的子问题,并利用连续干扰消除的思想解决子天线阵列之间的干扰,以求得整个系统的最大信道容量问题。仿真结果表明提出的混合预编码算法在性能上十分接近最优算法,且复杂度大大降低。
[Abstract]:In the research of the fifth generation wireless communication technology, millimeter wave communication has been paid much attention and studied by virtue of its huge channel capacity. The application of millimeter-wave communication technology to the MIMO wireless communication system, which has been widely used at present, can greatly increase the channel capacity. The application of large antenna array can alleviate the unavoidable path loss problem of millimeter wave system, but it also increases the hardware complexity of digital precoder. In order to simplify the complexity, a subantenna array structure is used to replace the full antenna array structure, and the precoding of the whole system is completed in both digital and analog domains, and an improved hybrid precoding algorithm is proposed. By decomposing the complex channel capacity problem into several independent sub-problems and using the idea of continuous interference cancellation to solve the interference between subantenna arrays, the maximum channel capacity problem of the whole system is obtained. Simulation results show that the performance of the proposed hybrid precoding algorithm is very close to the optimal algorithm, and the complexity is greatly reduced.
【作者单位】：南京邮电大学通信与信息工程;
【基金】：国家自然科学基金项目(61271234)
【分类号】：TN919.3

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