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数字光接收机灵敏度计算以S.D.Personick法最适合工程使用。但由于其中的误码率是假设在最劣码型全“1”条件下计算的,与实际“0”“1”等概率情况不符。CCITT在这点上加以修改,所以本文把它称为Personick-CCITT改良法。由于CCITT的推荐,预计这种方法会被广泛采用。 本文以改良法为基础,补充了具有暗电流和直流光情况的计算,使方法完善。为了简化计算,本文提出一套通用曲线,便于工程使用。
Digital light receiver sensitivity calculation to S.D.Personick method is most suitable for engineering use. However, since the bit error rate is assumed to be calculated under the worst “1” condition for all the worst codes, it does not match with the probabilities such as “0” and “1”. CCITT is modified at this point, so this article calls it the Personick-CCITT Improvement Act. Due to CCITT’s recommendation, this approach is expected to be widely adopted. Based on the improved method, this article complements the calculation with dark current and direct current conditions to make the method perfect. In order to simplify the calculation, this paper presents a set of common curves, which is convenient for engineering use.