TY  - JOUR
N2  - In this article, performance improvement of a free-space optical communication link with spatial diversity is evaluated for coherent (sub-carrier BPSK and sub-carrier QPSK) and non-coherent (OOK and Q-PPM) modulation schemes in an atmospheric turbulence fading channel. Based on Kolmogorov's theory, the link performance characterized by the signal-to-noise ratio or bit error rate is evaluated for both modulation schemes. It is observed that there is performance improvement with the increase in the order of transmit diversity for all the modulation schemes. Sub-carrier BPSK modulation outperforms the other modulation schemes in terms of the minimum signal-to-noise ratio requirement for a given bit error rate. Also, the effect of correlation among different transmitting antenna beams on the link performance is analyzed. Copyright © Taylor & Francis Group, LLC.
IS  - 4
KW  - BPSK modulation; Free Space Optical communication; IS performance; Kolmogorov; Link performance; Modulation schemes; Non-coherent; Performance improvements; Satellite optical communication; Spatial diversity; Transmit diversity; Transmitting antenna
KW  -  Atmospheric thermodynamics; Atmospheric turbulence; Bit error rate; Communication; Fading (radio); Fading channels; Modulation; Signal to noise ratio
KW  -  Optical communication
ID  - scholars1218
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-77954687446&doi=10.1080%2f01468030.2010.491893&partnerID=40&md5=987fbf81bbc8c9e85c07482d9b137302
A1  - Kaushal, H.
A1  - Jain, V.K.
A1  - Kar, S.
JF  - Fiber and Integrated Optics
VL  - 29
Y1  - 2010///
N1  - cited By 17
SP  - 315
TI  - Ground-to-satellite optical communication link performance with spatial diversity in weak atmospheric turbulence
AV  - none
EP  - 340
SN  - 01468030
ER  -