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提出BCH信道编码的方案来降低色度色散对降低快跳频OCDMA系统性能的影响 采用BCH信道编码后 ,单重合码的长度将变短 ,即可以用较少的波长数来构造码字 ,因此降低了色度色散的影响 分析结果表明 ,在相同的信息比特速率、脉元间隔、资用波长数的情况下 ,BCH信道编码能显著改善FFH OCDMA系统的误码率性能 同时 ,由于单重合码的长度将变短 ,大大降低了光纤光栅的制作难度 由于BCH信道编码在电域中实现 ,其硬件技术已相当成熟 ,所以对整个BCH/FFH OCDMA系统的代价影响不大
Propose a scheme of BCH channel coding to reduce the impact of chromatic dispersion on reducing the performance of a fast frequency hopping OCDMA system. After adopting BCH channel coding, the length of the single-codec becomes shorter, that is, the codeword can be constructed with fewer wavelengths, therefore The analysis of the effect of reducing the chromatic dispersion shows that the BCH channel coding can significantly improve the bit error rate performance of the FFH OCDMA system under the same information bit rate, pulse interval and the number of the service wavelengths. Meanwhile, The length will be shorter, greatly reducing the production of optical fiber grating Difficult to BCH channel coding in the electrical domain to achieve its hardware technology has been quite mature, so the entire BCH / FFH OCDMA system, the cost of little influence