10 Gb/s Indoor Optical Wireless Systems Employing Beam Delay, Power, and Angle Adaptation Methods With Imaging Detection
10 Gb/s Indoor Optical Wireless Systems Employing Beam Delay, Power, and Angle Adaptation Methods With Imaging Detection
复制标题
采用具有成像检测功能的光束延迟、功率和角度自适应方法的 10 Gb/s 室内光学无线系统
DOI：
10.1109/jlt.2012.2190970
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发表时间：
2012
影响因子：
4.7
通讯作者：
J. Elmirghani
中科院分区：
文献类型：
--
作者：
M. Alresheedi;J. Elmirghani
在本文中，我们提出了一个移动的光无线系统，采用光束延迟自适应，并利用我们以前介绍的光束角度和功率自适应多光束点扩散配置结合成像接收器。我们的最终目标是提高带宽，减少符号间干扰的影响，并增加信噪比（SNR）时，发射机工作在一个更高的数据速率下的多径色散，背景噪声和移动性的影响。与传统的漫射系统（CDS）相比，当成像接收器在房间的角落处替换非成像接收器时，可以实现延迟扩展的显著减小，其中延迟扩展从2.4 ns减小到约0.35 ns。我们提出的系统，光束延迟，角度，和功率自适应在一个线条带多光束点扩散配置（BDAPA-LSMS），提供了一个减少延迟扩展的因素超过10相比，只有光束角度和功率自适应LSMS。当采用我们的波束延迟、角度和功率自适应方法与成像接收器相结合时，可以实现信道带宽从36 MHz（CDS）增加到约9.8 GHz。这些改进增强了我们的系统，使其能够以10 Gb/s的更高数据速率运行。在30 Mb/s的比特率下，我们提出的BDAPA-LSMS比采用非成像接收器（CDS）的传统漫射系统实现了约50 dB的SNR增益。此外，我们的仿真结果表明，建议BDAPA-LSMS在10 Gb/s的比特率达到约32.3 dB的SNR在最差的通信路径下的背景噪声和移动性的存在下，同时实现低于10-9的误码率。
In this paper, we propose a mobile optical wireless system that employs beam delay adaptation, and makes use of our previously introduced beam angle and power adaptation multi-beam spot diffusing configuration in conjunction with an imaging receiver. Our ultimate goal is to improve the bandwidth, reduce the effect of intersymbol-interference, and increase the signal-to-noise ratio (SNR) when the transmitter operates at a higher data rate under the impact of multipath dispersion, background noise, and mobility. A significant reduction in the delay spread can be achieved compared to a conventional diffuse system (CDS) when an imaging receiver replaces a nonimaging receiver at the room's corner, where the delay spread is reduced from 2.4 ns to about 0.35 ns. Our proposed system, beam delay, angle, and power adaptation in a line strip multibeam spot diffusing configuration (BDAPA- LSMS), offers a reduction in delay spread by a factor of more than 10 compared with only the beam angle and power adaptation LSMS. An increase in channel bandwidth from 36 MHz (CDS) to about 9.8 GHz can be achieved when our methods of beam delay, angle, and power adaptation coupled with an imaging receiver are employed. These improvements enhance our system and enable it to operate at a higher data rate of 10 Gb/s. At a bit rate of 30 Mb/s, our proposed BDAPA-LSMS achieves about 50 dB SNR gain over conventional diffuse systems that employ a nonimaging receiver (CDS). Moreover, our simulation results show that the proposed BDAPA-LSMS at a bit rate of 10 Gb/s achieves about 32.3 dB SNR at the worst communication path under the presence of background noise and mobility while achieving a bit error rate below 10-9.