Direct detection of optical orthogonal frequency division multiplexing (OFDM) signals

摘要

Techniques for timing synchronization in an optical orthogonal frequency division multiplexing (OOFDM) system includes providing a time-domain training symbol having a symmetric distribution and producing the training symbol by transmitting a real-valued PN sequence on each subcarrier under the OOFDM. The training sequence includes an initial value, followed by an odd length palindromic sequence of values.

主权项

1. A method for computing timing synchronization in an optical communication system based on optical orthogonal frequency division multiplexing (OOFDM) and direct detection of OOFDM, comprising:
providing a time-domain training symbol comprising a first portion and a second portion that is a symmetric image of the first portion around a center value that is not a part of the first portion and the second portion, the first portion being preceded by an initial value; and producing the training symbol by transmitting a real-valued PN sequence on each subcarrier under the OOFDM.