Performance Comparison of Phase-compensated Constant Modulus Algorithm to CMA in Wireless Communication

In wireless communication systems, equalization process is needed to suppress the intersymbol interference (ISI) caused by multipath channels. Conventional equalization techniques use training signals. Blind Methods are of great importance in the digital communication systems as they allow channel equalization at the receiver without the use for training signals. A receiver, comprising an adaptive filter, performs blind equalization using a modified form of the constant modulus algorithm (CMA). This modified form of CMA is referred to as phase compensating CMA (PC-CMA). The performance of PC-CMA is greatly improved in comparison with CMA with reference to the parameters, Inter Symbol Interference (ISI), Bit Error rate (BER) and convergence factor.