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分析了跳频通信在最恶劣情况下的部分频带(噪声或多音)于扰下采用RS码,或RS码与分集相结合时的性能,在此基础上提出一种简单实用的抗干扰编码方案;着重讨论了方案的设计及高速而又低复杂度地实时实现方案的途径。结果表明,与无编码无分集的2FSK跳频系统相比,(63,21)RS码与分集相结合可获得约40dB的编码增益,在微机上用WinogradFFT实现译码器,实时传输速度可达38.4kb/S.
This paper analyzes the performance of some frequency bands (noise or multi-tone) in the worst case of frequency hopping communication when using RS code or combining RS code with diversity, and proposes a simple and practical anti-interference code Program; focuses on the design of the program and high-speed and low complexity ways to achieve the program in real time. The results show that compared with uncoded 2FSK frequency hopping system, (63,21) RS code and diversity combination can obtain about 40dB coding gain, and the decoder is realized by WinogradFFT on the microcomputer. The real-time transmission speed is up to 38.4kb / s.