Open AccessBER and channel capacity of a deep space FSO communication system using L-PPM-MSK-SIM scheme during superior solar conjunction
Author(s) -
Guanjun Xu
Publication year - 2019
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.27.024610
Subject(s) - bit error rate , pulse position modulation , free space optical communication , keying , noise (video) , communications system , modulation (music) , physics , phase shift keying , optical communication , electronic engineering , channel (broadcasting) , optics , computer science , telecommunications , pulse (music) , pulse amplitude modulation , engineering , acoustics , artificial intelligence , detector , image (mathematics)
Although free space optical (FSO) communication is a promising technique for deep space communication and it can help in the rapid development of space exploration missions, it encounters coronal turbulence during superior solar conjunction. To improve the bit error rate (BER) performance of FSO communication system under the influence of coronal turbulence, a hybrid modulation scheme, L-PPM-MSK-SIM-which is a combination of pulse position modulation (PPM), minimum shift keying (MSK), and sub-carrier intensity modulation (SIM) techniques-is proposed in this study. Considering various noise sources, both the BER and channel capacity of the communication system are evaluated under the lognormal (LN) turbulence channel. Our simulation results demonstrate that the BER performance with the L-PPM-MSK-SIM scheme is superior to that with L-PPM and BPSK-SIM schemes. In addition, the parameters of the coronal turbulence and FSO communication system have a tremendous influence on the link BER and channel capacity. Moreover, our results also revel that thermal noise is more predominant than the short noise and background noise for the BER performance of deep space FSO communication.