| 摘要 |
<p>Disclosed are a method and a device for demodulating an optical pilot tone signal. The method comprises: according to a set period of time, calculating in a segmented manner the strength value at the frequency of each received optical pilot tone signal; by using the calculated strength value within each period of time, determining the signal strength range and the noise strength range at the frequency of each optical pilot tone signal within each period of time; and matching each strength value with the strength range within a corresponding period of time, and after the strength range to which each strength value belongs is obtained, demodulating a bit value corresponding to each strength value. In the present invention, a strength range of noise and a strength range of an optical pilot tone signal are adjusted dynamically. In any noise distribution status, during demodulation of an optical pilot tone signal, the same correspondence between the frequency and wavelength of an optical pilot tone signal can be adopted to perform demodulation of an optical pilot tone signal.</p> |
