Title :
Effect of histogram resolution on demodulation of optical quadrature amplitude modulation signal by adaptive threshold adjustment
Author :
Chiba, Akito ; Sakamoto, Takahide ; Kawanishi, Tetsuya
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan
Abstract :
Coherent optical receivers based on digital signal processing (DSP) have gained immense popularity because of their simple configuration; these devices offer flexibility in the adjustment of any parameter and connectivity of each compensation technique. In this paper, we evaluated the effect of the degree of histogram resolution on the bit-error rate (BER) of the optical QAM signal which can be precisely created by using a LiNbO3 optical modulator and showed that it decreased to less than 20 divisions along each orthogonal axis in a constellation map.
Keywords :
demodulation; error statistics; lithium compounds; niobium compounds; optical materials; optical modulation; optical receivers; quadrature amplitude modulation; LiNbO3; adaptive threshold adjustment; bit-error rate; coherent optical receiver; compensation technique; constellation map; digital signal processing; histogram resolution; optical QAM signal; optical demodulation; optical modulator; optical quadrature amplitude modulation signal; orthogonal axis; Adaptive optics; Bit error rate; Demodulation; Digital signal processing; Histograms; Optical modulation; Optical receivers; Optical signal processing; Quadrature amplitude modulation; Signal resolution;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5192678
