On the Performance of Multihop Heterodyne FSO Systems With Pointing Errors

Emna Zedini, Mohamed-Slim Alouini
2015 IEEE Photonics Journal  
This paper reports the end-to-end performance analysis of a multihop freespace optical system with amplify-and-forward (AF) channel-state-information (CSI)assisted or fixed-gain relays using heterodyne detection over Gamma-Gamma turbulence fading with pointing error impairments. In particular, we derive new closed-form results for the average bit error rate (BER) of a variety of binary modulation schemes and the ergodic capacity in terms of the Meijer's G function. We then offer new accurate
more » ... mptotic results for the average BER and the ergodic capacity at high SNR values in terms of simple elementary functions. For the capacity, novel asymptotic results at low and high average SNR regimes are also obtained via an alternative moments-based approach. All analytical results are verified via computer-based Monte-Carlo simulations.
doi:10.1109/jphot.2015.2417867 fatcat:ngoor6u2qvb5nbrqtigzffbyaq