Modulation scheme for wireless optical intensity channel based spatial coding

Weiqing Pan; Liren Liu; Jiming Wang; Dong Zhao

doi:10.1117/12.678294

1 September 2006 Modulation scheme for wireless-optical-intensity-channel-based spatial coding

Weiqing Pan, Liren Liu, Jiming Wang, Dong Zhao

Proceedings Volume 6304, Free-Space Laser Communications VI; 63041X (2006) https://doi.org/10.1117/12.678294
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Weiqing Pan, Liren Liu, Jiming Wang, and Dong Zhao "Modulation scheme for wireless-optical-intensity-channel-based spatial coding", Proc. SPIE 6304, Free-Space Laser Communications VI, 63041X (1 September 2006); https://doi.org/10.1117/12.678294

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KEYWORDS

Modulation

Channel projecting optics

Quadrature amplitude modulation

Wireless communications

Signal processing

Surface plasmons

Optical communications

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