BLIND EQUALIZATION OF DUAL SUBCARRIER OFDM SIGNALS

摘要

A dual-polarization, 2-subcarriers code orthogonal, orthogonal frequency division multiplexed signal carrying information bits is transmitted in an optical communication network without transmitting a corresponding pilot tone or training sequence. A receiver receives the transmitted signal and recovers information bits using a blind equalization technique and by equalizing the 2-subcarriers OFDM signal as a 9-QAM signal in time domain with a CMMA (constant multi modulus algorithm) equalization method.

主权项

1. A method for recovering data from a two-subcarrier orthogonal frequency division multiplexed (OFDM) signal in which each subcarrier is modulated using a Quadrature Amplitude Modulation (QAM) constellation, comprising:
receiving the two-subcarrier OFDM signal; converting the two-subcarrier OFDM signal into a time domain QAM signal; and performing blind equalization of the time domain QAM signal to recover the data.