%K Acquisition time; OOK; Q-PPM; Sub-carrier BPSK and QPSK; Transmit diversity, Atmospheric thermodynamics; Communication; Laser beams; Mergers and acquisitions; Modulation, Atmospheric turbulence
%X A laser beam propagating through a random medium such as atmosphere will experience irradiance fluctuations due to the presence of turbulence. The turbulence induced fading can be circumvented by implementing transmit diversity which involves the deployment of multiple laser transmitters at the ground station. In this paper, performance of laser uplink communication with transmit diversity in atmospheric turbulence channels has been analyzed in terms of acquisition time for coherent (sub-carrier BPSK and QPSK) and noncoherent (OOK and Q-PPM) modulation schemes. In the analysis, both uncorrelated and correlated uplink laser beams are considered. It has been observed that transmit diversity decreases the acquisition time in all the modulation schemes irrespective of turbulence strength. Sub-carrier BPSK gives the least acquisition time to acquire the space borne satellite among all the modulation schemes. In case of non-coherent modulation schemes, OOK gives slightly better results than 2-PPM but there is an improvement in the acquisition time of Q-PPM as the value of Q increases. ©2010 IEEE.
%R 10.1109/ICFCC.2010.5497311
%D 2010
%L scholars1139
%J Proceedings of the 2010 2nd International Conference on Future Computer and Communication, ICFCC 2010
%O cited By 2; Conference of 2010 2nd International Conference on Future Computer and Communication, ICFCC 2010 ; Conference Date: 21 May 2010 Through 24 May 2010; Conference Code:81983
%C Wuhan
%V 1
%A H. Kaushal
%A V.K. Jain
%A S. Kar
%T Acquisition time for laser uplink communication to space-borne satellite using transmit diversity in atmospheric turbulence
%P V1840-V1845