期刊名称：Advance Journal of Food Science and Technology
印刷版ISSN：2042-4868
电子版ISSN：2042-4876
出版年度：2016
卷号：11
期号：5
页码：367-374
DOI：10.19026/ajfst.11.2643
出版社：MAXWELL Science Publication
摘要：In this study, it is the most appropriate modulation format for food free space optical (FFSO) system compared with other modulation schemes. Performance of BER for BPSK, DPSK and QPSK has been detail discussed under Gamma-Gamma turbulent channel with intensity scintillation and phase fluctuations. The closed average BER expression and channel capacity expression have been derived by adopting the method of generalized hypergeometric. From experiments show that BER and transmission power degraded seriously for the three kinds of modulation format owing to intensity scintillation and phase fluctuations. Comparing performance of the three modulation methods under the atmospheric turbulence, the results for the performance of BPSK and QPSK almost unanimously, in the case of an given SNR it is obvious that BPSK with lower BER. Therefore, BPSK modulation has a good BER and effective resist turbulent but the transmission power will not be increased.
