DocumentCode :
25883
Title :
Non-Line of Sight Optical Wireless Relaying With the Photon Counting Receiver: A Count-and-Forward Protocol
Author :
Chen Gong ; Zhengyuan Xu
Author_Institution :
Sch. of Inf. Sci. & Technol., Univ. of Sci. & Technol. of China, Hefei, China
Volume :
14
Issue :
1
fYear :
2015
fDate :
Jan. 2015
Firstpage :
376
Lastpage :
388
Abstract :
We propose a count-and-forward relay framework for non-line of sight optical wireless relay communications. Both the relay and the destination employ an ideal photon counting receiver. The relay forwards on-off keying (OOK) modulated optical signals using discrete power levels corresponding to the number of received photons, and the destination employs maximum-likelihood detection. We formulate the forwarding power optimization problem that aims to minimize the destination detection error probability given the relay forwarding power budget. We pursue exact optimal solutions to two special cases. To solve the non-convex forwarding power optimization problem in general, we transform to a piecewise exponential approximation problem. Numerical results show that the proposed scheme outperforms the relay hard-decision forwarding scheme, and can approach the optimal power allocation performance based on simulated annealing.
Keywords :
amplitude shift keying; approximation theory; concave programming; error statistics; maximum likelihood detection; optical receivers; photon counting; protocols; relay networks (telecommunication); OOK; count-and-forward relay protocol framework; destination detection error probability; discrete power levels; maximum-likelihood detection; nonconvex forwarding power optimization problem; nonline of sight optical wireless relay communication; on-off keying modulated optical signals; optimal power allocation performance; photon counting receiver; piecewise exponential approximation problem; relay forwarding power budget; relay hard-decision forwarding scheme; simulated annealing; Approximation methods; Optimization; Photonics; Protocols; Receivers; Relays; Wireless communication; Optical wireless communication; count-and-forward; non-line-of-sight; photon-counting receiver; relay;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2014.2347302
Filename :
6877718
Link To Document :
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