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针对短波通信中同时存在误码和丢包的特点,提出了一种频域RS码与数字喷泉码串行级联的纠错纠删编码算法,并在FPGA芯片及短波电台终端上予以实现。频域RS码作为外码,LT码作为内码,使RS码和LT码互相促进,同时实现纠删和纠错,这是单独采用两种编码方法都无法达到的。仿真表明RS-LT级联编码可提高LT码译码成功概率。同时短波信道实测结果表明,编码模块的应用可有效提高短波电台正确接收概率。
Aiming at the characteristics of simultaneous existence of error code and packet loss in short-wave communication, an error correction and erasure coding algorithm of serial concatenated RS code and digital fountain code is proposed and implemented on FPGA chip and short-wave radio terminal. Frequency domain RS code as the outer code, LT code as the inner code, the RS code and LT code to promote each other, while erasing and error correction, which is used alone, two encoding methods can not be achieved. Simulation shows that RS-LT concatenated coding can improve the probability of LT code decoding success. At the same time, the experimental results show that the application of coding module can effectively improve the short-wave radio reception probability.