發(fā)布時(shí)間：2018-05-23 19:13

  本文選題：光通信 + 信道解相關(guān)��； 參考：《光學(xué)學(xué)報(bào)》2017年05期

【摘要】：隨著可見(jiàn)光通信多輸入多輸出(VLC-MIMO)系統(tǒng)收發(fā)端陣元數(shù)目增多、陣元間距減小以及傳輸距離增大,系統(tǒng)接收端信號(hào)間嚴(yán)重干擾、信道矩陣缺秩等問(wèn)題逐漸凸顯,導(dǎo)致系統(tǒng)的復(fù)用率降低、信道相關(guān)性增大。針對(duì)這些問(wèn)題,提出以最小化最大干信比為優(yōu)化目標(biāo);通過(guò)建立VLC-MIMO信道模型,分析收發(fā)端陣元法向量?jī)A斜角度對(duì)信道相關(guān)性的影響;通過(guò)優(yōu)化發(fā)光二極管(LED)法向量?jī)A斜角度來(lái)減小信道相關(guān)性,并得到各個(gè)LED法向量的最佳傾斜角度。通過(guò)比較系統(tǒng)接收平面的光照度分布,發(fā)現(xiàn)所提出的優(yōu)化方案能有效減小信號(hào)間干擾,與鏈路阻塞方式相比,該方案的誤碼率降低了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.
【作者單位】： 中國(guó)人民解放軍信息工程大學(xué)信息系統(tǒng)工程學(xué)院;
【基金】：國(guó)家863計(jì)劃(2013AA013603) 國(guó)家自然科學(xué)基金(61271253)
【分類(lèi)號(hào)】：TN929.1

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