BER Analysis of a Hybrid Modulation Scheme Based on PPM and MSK Subcarrier Intensity Modulation

被引：8
作者：
Liu, Hongzhan [1 ,2 ]
Liao, Renbo [1 ]
Wei, Zhongchao [1 ]
Hou, Zhiyun [1 ]
Qiao, Yaojun [2 ]
机构：
[1] S China Normal Univ, Guangdong Prov Key Lab Nanophoton Funct Mat & Dev, Guangzhou 510006, Guangdong, Peoples R China
[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2015年 / 7卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Free-space optical communication; subcarrier intensity modulation; atmospheric turbulence; atmospheric attenuation; bit-error rate (BER); SPACE OPTICAL COMMUNICATION; ATMOSPHERIC-TURBULENCE CHANNELS; PERFORMANCE ANALYSIS; SYSTEMS; NOISE;
D O I：
10.1109/JPHOT.2015.2449265
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In order to improve the bit-error-rate (BER) performance of free-space optical (FSO) communication systems employing binary phase-shift keying subcarrier intensity modulation (BPSK-SIM), an innovative hybrid modulation scheme called PPM-MSK-SIM is proposed, which is based on pulse position modulation (PPM) and minimum shift keying (MSK) subcarrier intensity modulation. Subsequently, the BER performance of PPM-MSK-SIM is studied in detail for an FSO system over log-normal turbulence channels with avalanche photodiode detection. The results of the numerical simulation show that PPM-MSK-SIM has the advantages of improving the BER performance compared with BPSK-SIM and PPM. For example, at the same received irradiance of -2.1 dBm and the same strength of turbulence C-n(2) = 7.5 x 10(-15) m(-2/3), the BER performance of 2-PPM-MSK-SIM can decrease to 1.02 x 10(-9), whereas those of 2-PPM and BPSK-SIM are just 1.19 x 10(-7) and 2.29 x 10(-6), respectively. This makes PPM-MSK-SIM a favorable candidate for the modulation technique in FSO communication systems.
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页数：10
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