Equalization algorithm based on CMA and SVM for carrierless amplitude phase modulation in optical access networks

An equalization algorithm is proposed for carrier-less amplitude and phase (CAP) modulation system, which is regarded as a good candidate for short range optical communications, like electrical power optical fiber communication, optical access network. The constant module algorithm (CMA) combined with support vector machine (SVM) performs the equalization function. The simulation system was setup for both single-band 16-CAP signal at 10Gbps and multi-band M-CAP (4-CAP, 16-CAP, 64-CAP) signal at 100Gbps. After the CMA-SVM equalization, the impaired CAP signals are compensated effectively. The phase rotation is recovered and the centralization of each constellation points is improved obviously, which demonstrate the feasibility of the proposed equalization algorithm.