Open AccessFree space optical communications with distributed switch‐and‐stay combining
Author(s) -
Gupta Juhi,
Dwivedi Vivek K.,
Karwal Vikram,
Ansari ImranShafique,
Karagiannidis George K.
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.0920
Subject(s) - cumulative distribution function , moment generating function , probability density function , path loss , fading , topology (electrical circuits) , free space optical communication , path (computing) , function (biology) , gamma distribution , computer science , mathematics , channel (broadcasting) , closed form expression , telecommunications , optical communication , statistics , physics , mathematical analysis , computer network , optics , combinatorics , wireless , evolutionary biology , biology
The authors study the performance of an amplify‐and‐forward dual‐hop, switch‐and‐stay combining receiver, used in free space optical communications over non‐identical fading channels. One path is characterised by the generalised Málaga (or M distribution), whereas the other is influenced by the combined effects of Gamma–Gamma distributed atmospheric turbulence, pointing error and path loss. Novel closed‐form expressions for the end‐to‐end moment generating function, probability density function, and cumulative distribution function are derived in terms of Meijer's G function. Furthermore, the performance of the system is analysed, and closed‐form expressions are presented for the end‐to‐end outage probability and channel capacity.