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Analysis and comparison of impairments in differential phase-shift keying and on-off keying transmission systems based on the error probability

机译：基于误差概率的差分相移键控和开关键控传输系统的损伤分析与比较

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摘要

The effect of nonlinear phase noise in dispersion-managed optical transmission systems is studied. The variance of the nonlinear phase noise in systems based on differential phase-shift keying (DPSK) in the presence of dispersion is examined analytically, and a semianalytical expression to calculate the error probability including intrachannel four-wave mixing, linear phase noise, and nonlinear phase noise for systems based on DPSK is derived. In addition, for the on-off keying (OOK) format, the formula for the error probability including amplified spontaneous emission noise and intrachannel nonlinear effects has been given. On the basis of the semianalytical expressions, we have compared the error probability of systems based on DPSK and OOK, and the results show that, to reach a given bit error rate of 10~(-9) for a specific long-haul system, the difference between the signal-to-noise ratio required by the DPSK format and that required by the OOK format is around 6 dB for the launch power of 0 dBm, and the difference becomes larger as the launch power increases.
机译：研究了色散管理光传输系统中非线性相位噪声的影响。分析了基于色散存在下基于差分相移键控（DPSK）的系统中非线性相位噪声的方差，并通过半解析表达式来计算误差概率，包括通道内四波混频，线性相位噪声和非线性推导基于DPSK的系统的相位噪声。此外，对于开关键控（OOK）格式，还给出了包括放大的自发发射噪声和通道内非线性效应在内的错误概率公式。根据半解析表达式，我们比较了基于DPSK和OOK的系统的误码率，结果表明，对于特定的长距离系统，要达到给定的10〜（-9）误码率，对于0 dBm的发射功率，DPSK格式所需的信噪比与OOK格式所需的信噪比之间的差约为6 dB，并且随着发射功率的增加，该差变得更大。

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