| 摘要 |
Embodiments of the present invention provide a training sequence generation method, a training sequence generation apparatus, and an optical communications system, where the training sequence generation method includes: generating a pseudo random sequence; obtaining a chirp coefficient of a modulator used in the optical communications system; using a negated chirp coefficient to modulate the pseudo random sequence to generate a pseudo random sequence of the chirp; constructing a training symbol segment that includes L subcarriers in a frequency domain, where in the training symbol segment, a signal sent over a subcarrier with an even ordinal number is a frequency domain signal of a pseudo random number with the same ordinal number in the chirped pseudo random sequence, and a signal sent over a subcarrier with an odd ordinal number is a zero-level signal; transforming the training symbol segment from the frequency domain to a time domain to obtain a training symbol segment in the time domain; and generating a training sequence based on the training symbol segment in the time domain and outputting the training sequence. A technical solution provided in the present invention can effectively resolve a problem of a frequency deviation of an optical signal caused by an introduction of the chirp. |
