Open AccessAsymptotic analysis of V-BLAST MIMO for coherent optical wireless communications in Gamma-Gamma turbulence
Author(s) -
Yiming Li,
Chao Gao,
Mark S. Leeson,
Xiaofeng Li
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.027931
Subject(s) - mimo , diversity gain , spatial multiplexing , bit error rate , wireless , multiplexing , transmission (telecommunications) , computer science , physics , electronic engineering , attenuation , channel (broadcasting) , optics , telecommunications , engineering
This paper investigates the asymptotic BER performance of coherent optical wireless communication systems in Gamma-Gamma turbulence when applying the V-BLAST MIMO scheme. A new method is proposed to quantify the performance of the system and mathematical solutions for asymptotic BER performance are derived. Counterintuitive results are shown since the diversity gain of the V-BLAST MIMO system is equal to the number of the receivers. As a consequence, it is shown that when applying the V-BLAST MIMO scheme, the symbol rate per transmission can be equal to the number of transmitters with some cost to diversity gain. This means that we can simultaneously exploit the spatial multiplexing and diversity properties of the MIMO system to achieve a higher data rate than existing schemes in a channel that displays severe turbulence and moderate attenuation.