摘要
针对MIMO(Multiple Input Multiple Output)室内可见光通信系统,提出基于子流选择块对角化(Block Diagonalization,BD)预编码的MIMO可见光通信系统。在已有的BD预编码MIMO可见光通信系统模型基础上,针对其功率利用率和误码率等方面不足进行改进,提出了子流选择的BD预编码系统,同时提出优化信道矩阵高相关性的方法,并通过仿真验证了在系统容量损失较小的情况下,系统能够提高用户的误码率性能。在传输速率为100 Mbps下,对如何布局固定用户位置以及理想位置下系统的信噪比性能等进行研究仿真,验证在理想位置下各个用户的信噪比在大多数情况下都能得到大于40dB的信噪比性能。
The paper puts forward the MIMO visible light communication system based on substreams selected BD precoding algorithm. Comparing with the existing BD precoded MIMO VLC（Visible Light Communication） system, the power efficiency and bit error rate were improved on the system based on substreams selected BD precoding algorithm. At the same time, the method to reduce the correlation of the channel matrix was proposed. According to the simulation, the bit error rate for the user under the condition of less reduced capacity can be improved by the system. Based on the transfer rate of 100 Mbps, layout of the fixed user＇s location and the users＇ SNR（Signal to Noise Ratio） at the ideal location were also investigated. The users＇ SNR of 40 dB can be achieved in most cases.
出处
《光电子技术》
CAS
2015年第2期126-130,134,共6页
Optoelectronic Technology
关键词
可见光通信
块对角化预编码
子流选择
布局固定用户
visible light communication
BD precoding algorithm
substreams selected
fixed user＇ s layout
