基于极化码的无线光通信副载波误码性能分析
Analysis on error rate of wireless optical communication using subcarrier modulation based on polar code
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摘要: 提出了一种基于极化码的无线光信道副载波调制方法,给出了极化编译码的具体算法过程,并将其应用于无线光通信系统。在不同大气湍流强度下,对系统的差错性能进行了仿真分析,其重对基于极化码的二相相移键控和四相相移键控两种调制方法的误码率进行了对比,结果表明,采用极化码的副载波二相相移键控调制系统的性能优于四相相移键控系统。最后,实验比较分析了极化编码前后副载波调制系统的误比特率,结果表明,在无线光通信大气湍流信道模型下,采用副载波极化码编码调制技术可使误码率性能改善一个量级。Abstract: A novel polar coded subcarrier phase shift keying modulation method suitable for wireless optical communication system was proposed in this paper. Then their encoding and decoding procedures were presented for polar coding schemes over the atmospheric turbulence channels. By simulating the system performance under various atmospheric turbulence conditions, the bit error rate(BER) performance were compared between binary phase shift keying modulation with polar code(BPSK-PC) and quaternary phase shift keying modulation with polar code(QPSK-PC). The results show that the error correction performance of BPSK-PC system is better than that of QPSK-PC system. Finally, the experimental BER performance of the subcarrier phase shift keying modulation with and without polar code were conducted and analyzed as well. The experimental results show that the proposed method can improve the BER performance with an order of magnitude, by using polar code in wireless communication system together with subcarrier phase shift keying modulation.
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