基于法向量倾斜的可见光通信多输入多输出信道解相关技术

发布时间：2018-05-23 19:13

本文选题：光通信 + 信道解相关　；参考：《光学学报》2017年05期

【摘要】：随着可见光通信多输入多输出(VLC-MIMO)系统收发端阵元数目增多、阵元间距减小以及传输距离增大,系统接收端信号间严重干扰、信道矩阵缺秩等问题逐渐凸显,导致系统的复用率降低、信道相关性增大。针对这些问题,提出以最小化最大干信比为优化目标;通过建立VLC-MIMO信道模型,分析收发端阵元法向量倾斜角度对信道相关性的影响;通过优化发光二极管(LED)法向量倾斜角度来减小信道相关性,并得到各个LED法向量的最佳倾斜角度。通过比较系统接收平面的光照度分布,发现所提出的优化方案能有效减小信号间干扰,与链路阻塞方式相比,该方案的误码率降低了42dB。
[Abstract]:With the increase of the number of transceiver array elements, the decrease of array spacing and transmission distance, the serious interference between signals at the receiver end of the system and the lack of rank of the channel matrix, etc. As a result, the multiplexing rate of the system decreases and the channel correlation increases. Aiming at these problems, this paper proposes to minimize the maximum dry signal ratio as the optimization objective, and analyzes the influence of normal vector tilt angle of transceiver array on channel correlation by establishing VLC-MIMO channel model. The channel correlation is reduced by optimizing the LED normal vector tilt angle, and the optimal tilt angle of each LED normal vector is obtained. By comparing the light intensity distribution in the receiving plane of the system, it is found that the proposed optimization scheme can effectively reduce the inter-signal interference. Compared with the link blocking mode, the BER of the scheme is reduced by 42 dB.
【作者单位】：中国人民解放军信息工程大学信息系统工程学院;
【基金】：国家863计划(2013AA013603) 国家自然科学基金(61271253)
【分类号】：TN929.1

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