In optical fibre communication system, improved modulation schemes have been proposed to increase capability and high bit rate transmission. One such technique is optical duobinary modulation, which can able to broadcast high-speed optical signals over bandwidth-limited channels. The conventional modulation schemes employ the non-return-to-zero modulation and return-to-zero modulation technique. These schemes decrease spectrum width and increase the dispersion tolerance. However, the effect of inter-symbol inference presents between the pulses. These techniques give a reduced performance for high bit rate transmissions and transmission over long distances. Hence in this work, the implementation of duobinary modulation improves the performance of optical communication along with the provision of enhanced security through bio-inspired chaos masking scheme. The bio-inspired chaos-masking scheme generates the security key using the spider security pattern generator to provide improved security. The parameters of the proposed technique are analysed for different transmission rates and the performance improvement is validated.

中文翻译：

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通过生物启发式混沌屏蔽方案提高安全性的双二进制光通信方案

在光纤通信系统中，已经提出了改进的调制方案以增加能力和高比特率传输。一种这样的技术是光双二进制调制，它能够在带宽受限的信道上广播高速光信号。常规的调制方案采用非归零调制和归零调制技术。这些方案减小了光谱宽度并增加了色散容限。但是，在脉冲之间存在符号间推断的影响。这些技术降低了高比特率传输和长距离传输的性能。因此，在这项工作中 双二进制调制的实现通过生物启发的混沌掩蔽方案提高了光通信的性能，并提供了增强的安全性。受生物启发的混沌掩盖方案使用蜘蛛安全模式生成器生成安全密钥，以提供改进的安全性。针对不同的传输速率分析了所提出技术的参数，并验证了性能改进。