Evaluation of coverage area for a wide line-of-sight indoor optical free-space communication system employing coherent detection

被引：13
|
作者：
Jafar, M. [1 ,2 ]
O'Brien, D. C. [2 ]
Stevens, C. J. [2 ]
Edwards, D. J. [2 ]
机构：
[1] Univ Bath, Dept Elect & Elect Engn, Bath BA2 7AY, Avon, England
[2] Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England
来源：
IET COMMUNICATIONS | 2008年 / 2卷 / 01期
关键词：
D O I：
10.1049/iet-com:20060225
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：
The application of coherent detection to indoor optical free-space communications is considered here. Analytical expressions are derived for a wide line-of-sight (W-LOS) optical link which determine the coverage area and the required photo-detection area given different binary digital transmission schemes and a given bit rate. The coverage area is maximised for systems using both metal-semiconductor-metal (NISM) and PIN photo-detectors. Results show that MSM photo-detectors, due to their inherently lower capacitance per unit photo-detection area, result in a greater coverage area than their PIN counterparts. To demonstrate the viability of implementing coherent detection indoors, a 200 Mb/s LOS optical link which uses coherent detection is also reported.
引用
收藏
页码：18 / 26
页数：9
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