DPSK和NRZ调制信号对透明光网络中的大功率串扰攻击容忍度研究

透明光网络受到越来越多的关注，已成为未来网络发展的一大趋势。然而，网络的透明性也带来了光层攻击的隐患，例如大功率的攻击信号可以利用带内串扰效应对网络实施攻击行为。由于差分移相键控(differential phase-shift-keying，DPSK)对带内串扰具有较好的容忍度，因此对它能否抵抗大功率带内串扰攻击进行了探讨。通过在VPI仿真软件上搭建光通信系统，并检测信号的BER，发现DPSK对带内串扰攻击的容忍度比不归零码（non-return-zero，NRZ）高9 dB，可见其具有更强的抗攻击能力。

Tolerance in high-powered crosstalk attack of DPSK and NRZ in transparent optical networks

Transparent optical network is now becoming increasingly attractive, but transparency will induce security threats, such as intra channel crosstalk attack in optical networks. Differential phase-shift-keying(DPSK) attracted more attention due to its high tolerance in intra channel crosstalk. In this paper, DPSK is employed to mitigate high powered intra channel crosstalk attack. Via VPItransMakerTM, an optical communication system is simulated to detect the BER penalty of DPSK modulated signals. The results indicate that DPSK has about 9dB tolerance of intra channel crosstalk attack than non-return-zero(NRZ), which makes DPSK have more advantages to affront potential high powered crosstalk attack in TON.