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Proceedings Paper

Modulation scheme for wireless-optical-intensity-channel-based spatial coding
Author(s): Weiqing Pan; Liren Liu; Jiming Wang; Dong Zhao
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Paper Abstract

A simple channel model of wireless optical links based spatial coding is described and two basic channel constraints are outlined. For representing the spatial patterns as signal points, a signal space based 2-D orthonormal basis functions is defined. After that, critical measures of performance are also defined as metrics for comparing candidate modulation schemes. Then three candidate modulation schemes exploiting spatial dimensions are proposed, which are spatial on-off keying, spatial pulse position modulation and spatial quadrature amplitude modulation schemes. At last, the three modulation schemes are compared by power efficiency and bandwidth efficiency. The appropriateness of each scheme is also discussed.

Paper Details

Date Published: 1 September 2006
PDF: 11 pages
Proc. SPIE 6304, Free-Space Laser Communications VI, 63041X (1 September 2006); doi: 10.1117/12.678294
Show Author Affiliations
Weiqing Pan, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Jiming Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Dong Zhao, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 6304:
Free-Space Laser Communications VI
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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