Ergodic Capacity Analysis of Free-Space Optical Links with Nonzero Boresight Pointing Errors

Imran Shafique Ansari, Mohamed-Slim Alouini, Julian Cheng

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

A unified capacity analysis of a free-space optical (FSO) link that accounts for nonzero boresight pointing errors and both types of detection techniques (i.e. intensity modulation/ direct detection as well as heterodyne detection) is addressed in this work. More specifically, an exact closed-form expression for the moments of the end-to-end signal-to-noise ratio (SNR) of a single link FSO transmission system is presented in terms of well-known elementary functions. Capitalizing on these new moments expressions, we present approximate and simple closedform results for the ergodic capacity at high and low SNR regimes. All the presented results are verified via computer-based Monte-Carlo simulations.
Original languageEnglish (US)
Pages (from-to)4248-4264
Number of pages17
JournalIEEE Transactions on Wireless Communications
Volume14
Issue number8
DOIs
StatePublished - Apr 1 2015

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