室内MIMO ACO-OFDM可见光通信系统接收机设计

设计了一种在室内可见光MIMO通信系统(MIMO-VLC)中使用具有两个不同视场角(FOV)的光电二极管(PD)的角度分集光接收机(2FOV-ADR),其兼具两个不同视场角的接收机(2-FOV)和传统角度分集接收机(ADR)的优点,实现了更优的接收性能。对将LED灯用作数据发射器的典型室内可见光通信场景进行仿真,结果表明,2FOV-ADR均衡器输出端的最小信噪比(minSNR)要高于2-FOV接收机和传统ADR,实现了室内97%的位置的minSNR在45 dB以上,相比于前两种接收机,这一比例分别提高了96%和32%。最后,对使用非对称限幅光正交频分复用(ACO-OFDM)作为调制方案的系统,计算总误码率(BER),给出了迫零和最小均方误差均衡器的结果。结果表明,对于所考虑的室内位置,2FOV-ADR都具有最低的误码率。

Design of Indoor Receiver Using Multiple-Input and Multiple-Output ACO-OFDM Visible Light Communication System

In this study,we design an angle diversity optical receiver using photodiodes with two different fields of view(FOV)for indoor multiple-input and multiple-output visible light communication systems.The system combines the advantages of the receiver with two different FOV(2-FOV)and traditional angle diversity receiver(ADR)to achieve better reception performance.Furthermore,simulation of a typical indoor visible light communication scenario using light-emitting diode lamps as the data transmitters is performed.In our simulation,the minimum signal-to-noise ratio(minSNR)at the output end of an equalizer in the proposed system is higher than those of the 2-FOV receiver and the conventional ADR,which achieves the minSNR of over 45 dB in 97%of indoor locations.The ratio is increased by 96%and 32%compared to those of the 2-FOV receiver and conventional ADR,respectively.Finally,the total bit error rate is calculated for the system using asymmetrically clipped optical orthogonal frequency division multiplexing as the modulation scheme,and the results of the zero-forcing equalizer and minimum mean square error equalizer are given.The results demonstrate that the proposed receiver has the lowest bit error rate for the indoor locations under consideration.