A pixelated MIMO wireless optical communication system

被引:109
作者
Hranilovic, Steve [1 ]
Kschischang, Frank R.
机构
[1] McMaster Univ, Dept Elect & Comp Engn, Hamilton, ON L8S 4K1, Canada
[2] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
multiple-input/multiple-output (MIMO) wireless optical channel; optical intensity modulation; optical space-time code; short-range wireless infrared channel; spatial modulation and coding;
D O I
10.1109/JSTQE.2006.876601
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper introduces the pixelated wireless optical channel, which transmits data at high rates using a series of coded time-varying images. This multiple-input/multiple-output point-to-point wireless optical channel, uses arrays of optical intensity transmitters and detectors to exploit the inherent spatial degrees of freedom and to realize significant gains in spectral efficiency over single-element systems. Spatial discrete multitone modulation is introduced as a means to combat low-pass spatial distortion and to alleviate spatial alignment problems of previous systems. The capacity of pixelated wireless optical channels is estimated by way of a water-pouring spectrum. A proof-of-concept experimental prototype is constructed using a 512 x 512 pixel liquid crystal display panel and 154 x 154 pixels of a charge-coupled device camera. A channel model is developed and the capacity estimated to be 22.4 kb/frame. An unoptimized multilevel code and multistage decoder is applied over the spatial frequency bins and shown to yield spectral efficiencies of approximately 1.7 kb/s/Hz over a range of 2 m.
引用
收藏
页码:859 / 874
页数:16
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