On the design of multiplier-less nonuniform filterbank transmultiplexer using particle swarm optimization

In this paper design of multiplier-less nonuniform filterbank transmultiplexer (ML NUFB TMUX) is presented. Nonuniform filter bank transmultiplexer (NUFB TMUX) is preferred when applications with different data rates are to be multiplexed. If filter coefficients can be represented in canonic signed digit (CSD) format with minimum number of signed power of two (SPT) terms, hardware complexity can be greatly reduced. Continuous coefficient NUFB TMUX is designed and particle swarm optimization (PSO) is used to synthesis filter coefficients in CSD format. Simulation results show that ML NUFB TMUX designed using the proposed algorithm has better signal to interference ratio (SIR) and frequency responses than those obtained by rounding continuous filter coefficients to the nearest CSD numbers.