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提出了基于窄带高斯过程的光接收机模型,改进了基于Karhunen-Loève变换的光接收机模型以包含波分复用(WDM)系统中的主要传输损伤.得到了2种模型各自条件下判决电流的统计特征,并证明了2种方法在一定程度上是一致的.所得解析结果与Monte-Carlo仿真结果精确吻合,可用于误码率的精确计算.通过比较,说明高斯近似法估算的误码率过大,故其应用范围受到限制.改进的Karhunen-Loève变换法具有很强的可扩展性,通过推广可以包含更多的因素,因此该方法可以作为IM-DD光传输系统性能精确评估的通用方法.
An optical receiver model based on narrow-band Gaussian process is proposed and the optical receiver model based on Karhunen-Loève transform is modified to include the main transmission impairments in the WDM system.The decision current And prove that the two methods are consistent to a certain degree.The obtained analytical results are in good agreement with the Monte-Carlo simulation results and can be used to accurately calculate the bit error rate.Through comparison, the error estimates by Gaussian approximation The rate of application is limited, so the improved Karhunen-Loève transform method has strong scalability and the promotion can include more factors, so this method can be accurately evaluated as the performance of IM-DD optical transmission system Common method