TY - JOUR
T1 - Impact of Pointing Errors on the Error Performance of Intersatellite Laser Communications
AU - Song, Tianyu
AU - Wang, Qian
AU - Wu, Ming Wei
AU - Ohtsuki, Tomoaki
AU - Gurusamy, Mohan
AU - Kam, Pooi Yuen
N1 - Funding Information:
Manuscript received August 17, 2016; revised March 27, 2017; accepted April 30, 2017. Date of publication May 16, 2017; date of current version June 19, 2017. This work was supported in part by the Singapore Ministry of Education (AcRF Tier 2 under Grant MOE2013-T2-2-135), in part by the National Natural Science Foundation of China under Grants 61302112 and 61571316, in part by the Ministry of Education of the PRC (SRF for the ROCS, the 47th batch), and in part by the Qianjiang Talent Project (QJD1402023). (Corresponding author: Qian Wang.) T. Song, Q. Wang, M. Gurusamy, and P.-Y. Kam are with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, and also with the National University of Singapore Suzhou Research Institute, Suzhou 215123, China (e-mail: song.tianyu@u.nus.edu; wang.qian@u.nus.edu; elegm@nus.edu.sg; elekampy@nus.edu.sg).
PY - 2017/7/15
Y1 - 2017/7/15
N2 - The effect of pointing errors on the average bit error probability (ABEP) of an intersatellite laser communication link is studied. A closed-form expression in terms of the Marcum $Q$ -function is given for calculating the instantaneous channel gain. This expression provides great potential in further performance analysis and system optimization. In addition, tight, closed-form upper and lower bounds on the ABEP are derived, by using bounds on the Gaussian $Q$ -function. These bounds are in simpler form than existing results and are much more efficient in numerical evaluations. Further simplifications of these bounds are performed and invertible ABEP expressions are given. Via numerical comparisons, these invertible ABEP expressions are shown to be accurate approximations within a wide range of transmit power of interest and thus provide efficient error prediction methods. The diversity gain is easily obtained using the invertible ABEP expressions, which is related to the ratio of the equivalent beam radius to the pointing error displacement standard jitter at the receiver. Moreover, we show explicitly how the ABEP depends on different system parameters.
AB - The effect of pointing errors on the average bit error probability (ABEP) of an intersatellite laser communication link is studied. A closed-form expression in terms of the Marcum $Q$ -function is given for calculating the instantaneous channel gain. This expression provides great potential in further performance analysis and system optimization. In addition, tight, closed-form upper and lower bounds on the ABEP are derived, by using bounds on the Gaussian $Q$ -function. These bounds are in simpler form than existing results and are much more efficient in numerical evaluations. Further simplifications of these bounds are performed and invertible ABEP expressions are given. Via numerical comparisons, these invertible ABEP expressions are shown to be accurate approximations within a wide range of transmit power of interest and thus provide efficient error prediction methods. The diversity gain is easily obtained using the invertible ABEP expressions, which is related to the ratio of the equivalent beam radius to the pointing error displacement standard jitter at the receiver. Moreover, we show explicitly how the ABEP depends on different system parameters.
KW - Average bit error probability (ABEP)
KW - beam waist
KW - diversity gain
KW - inter-satellite laser communications
KW - invertible expressions
KW - pointing errors
KW - the Gaussian Q-function
KW - the Marcum Q-function
KW - tight bounds.
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U2 - 10.1109/JLT.2017.2705132
DO - 10.1109/JLT.2017.2705132
M3 - Article
AN - SCOPUS:85028399325
VL - 35
SP - 3082
EP - 3091
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
SN - 0733-8724
IS - 14
M1 - 7930232
ER -