An optimized design of prototype filter for cosine modulated transmultiplexer

Abstract

An efficient M-channel cosine modulated transmultiplexer system can be simply designed in two steps: first, efficient design of prototype filter and second designing of synthesis/analysis filters using cosine modulation technique. In this paper, first prototype filter is designed using weighted constrained least square technique, then using an efficient optimization algorithm, sum of interference parameters such as inter-channel interference and inter-symbol interference of transmultiplexer system has been reduced. At last, M-channel uniform transmultiplexer system has been designed by using cosine modulation. With the help of design examples, dominance of the proposed method is illustrated.