Title :
High Order CAP System Using DML for Short Reach Optical Communications
Author :
Li Tao ; Yiguang Wang ; Yuliang Gao ; Nan Chi
Author_Institution :
Dept. of Commun. Sci. & Eng., Fudan Univ., Shanghai, China
Abstract :
Carrierless amplitude and phase (CAP) modulation is generating increasing interest for short reach optical communications. In this letter, we present the use of a decision-directed least mean square (DD-LMS) adaptive equalization algorithm for CAP128/256 transmission systems. A novel preconvergence scheme using aided threshold decision is proposed, called decision-assisted modified cascaded multimodulus algorithm. With the help of a DD-LMS-based equalizer, we demonstrate for the first time transmission of 10-Gb/s CAP128/256 signal over 40-km standard single mode fiber using low-cost directly modulated lasers.
Keywords :
adaptive equalisers; least mean squares methods; optical communication; phase modulation; DML; aided threshold decision; carrierless amplitude and phase modulation; decision directed least mean square adaptive equalization algorithm; high order CAP system; low cost directly modulated lasers; short reach optical communications; standard single mode fiber; Bit error rate; Equalizers; Matched filters; Optical fiber communication; Optical fibers; Optical filters; Carrierless amplitude and phase; DD-LMS; adaptive equalization;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2322610
