METHOD AND SYSTEM FOR DETERMINING DECISION THRESHOLD FOR MULTIPLE ASYNCHRONOUS WAVELENGTH LABEL SIGNALS

The present application relates to the technical field of optical communications, and relates to a method and system for determining a decision threshold for multiple asynchronous wavelength label signals. The method comprises: upon receipt of a target wavelength label signal obtained by performing alternating positive and negative coding, carrying out demodulation processing on the target wavelength label signal so as to obtain a signal power value corresponding to each bit in the target wavelength label signal; on the basis of the signal power value, performing iterative calculation to obtain an average signal power value and a noise power value which correspond to each bit; and on the basis of the average signal power value and the noise power value, calculating a decision threshold corresponding to each bit. According to the present application, by means of alternating positive and negative coding, the probabilities of transmitting bit 0 and transmitting bit 1 within a unit time each are stabilized at a l