Space-time codes for wireless optical communications
A space-time channel coding technique is presented for overcoming turbulence-induced fading in an atmospheric optical heterodyne communication system that uses multiple transmit and receive apertures. In particular, a design criterion for minimizing the pairwise probability of codeword error in a space-time code (STC) is developed from a central limit theorem approximation. This design criterion maximizes the mean-to-standard-deviation ratio of the received energy difference between codewords. It leads to STCs that are a subset of the previously reported STCs for Rayleigh channels, namely those created from orthogonal designs. This approach also extends to other fading channels with independent, zero-mean path gains. Consequently, for large numbers of transmit and receive antennas, STCs created from orthogonal designs minimize the pairwise codeword error probability for this larger class of fading channels.
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Related Subject Headings
- Networking & Telecommunications
- 4603 Computer vision and multimedia computation
- 4006 Communications engineering
- 0906 Electrical and Electronic Engineering
- 0801 Artificial Intelligence and Image Processing
Citation
Published In
DOI
ISSN
Publication Date
Issue
Start / End Page
Related Subject Headings
- Networking & Telecommunications
- 4603 Computer vision and multimedia computation
- 4006 Communications engineering
- 0906 Electrical and Electronic Engineering
- 0801 Artificial Intelligence and Image Processing