摘要
A novel trellis coded-4×8 overlapping amplitude and pulse position modulation(TC-4×8AOPPM) scheme is proposed to enhance bit error rate(BER) performance of free-space optical communication(FSO) system. In addition, an uncoded AOPPM referential scheme is also designed. The schemes manage to decrease BER by designing gamma-gamma(GG) channel applicable decoding and demodulation methods. Simulation results of 8, 16 and 64-state TC-4×8AOPPM show 2.5-3.3 dB SNR gain against traditional TC-4×8AOPPM scheme respectively. Thus significant BER performance improvement is achieved and the reliability of the FSO system is also enhanced.
A novel trellis coded-4×8 overlapping amplitude and pulse position modulation（TC-4×8AOPPM） scheme is proposed to enhance bit error rate（BER） performance of free-space optical communication（FSO） system. In addition, an uncoded AOPPM referential scheme is also designed. The schemes manage to decrease BER by designing gamma-gamma（GG） channel applicable decoding and demodulation methods. Simulation results of 8, 16 and 64-state TC-4×8AOPPM show 2.5-3.3 dB SNR gain against traditional TC-4×8AOPPM scheme respectively. Thus significant BER performance improvement is achieved and the reliability of the FSO system is also enhanced.
基金
supported in part by the National NSFC with No.61425022
National High Technology 863 Program of China with No.2013AA013403
National Basic Research Program of China with No.2010CB328300
National NSFC(No.60932004,61275074,61275158,& 61201151)
National International Technology Cooperation with No.2012DFG12110
Universities Ph.D. Special Research Funds with No.20120005120007
Beijing Excellent Ph.D. Thesis Guidance Foundation with No. 20121001302
Open foundation of state key laboratory of optical communication technologies and networks(WRI)
