Title :
A new pilot-aided scheme to measure modulator quadrature imbalance in CO-OFDM receiver
Author :
Chen Longquan ; Qiao Yaojun ; Ji Yuefeng
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China
Abstract :
The paper presents a new pilot-aided scheme to measure quadrature imbalance between the I and Q branch caused by imperfection of dual-parallel Mach-Zehnder modulator in a CO-OFDM transmission system. The method can accurately calculate the imbalance, and we implement the compensation of quadrature imbalance in a 36G CO-OFDM Receiver with applying GSOP algorithm.
Keywords :
OFDM modulation; light transmission; optical modulation; optical receivers; optical variables measurement; CO-OFDM receiver; CO-OFDM transmission system; GSOP algorithm; I branch; Q branch; dual-parallel Mach-Zehnder modulator; modulator quadrature imbalance measurement; pilot-aided scheme; Abstracts; Oscilloscopes; CO-OFDM; GSOP (Gram-Schmidt orthogonalization procedure); Quadrature Imbalance;
Conference_Titel :
Communications and Photonics Conference and Exhibition, 2011. ACP. Asia
Conference_Location :
Shanghai
Print_ISBN :
978-0-8194-8961-6
