Design of multiplier-free state-space digital filters

— In this paper, a novel approach is presented for designing multiplier-free state-space digital filters. The multiplier-free design is obtained by finding power-of-2 coefficients and also quantizing the state variables to power-of-2 numbers. Expressions for the noise variance are derived for the quantized state vector and the output of the filter. A “structuretransformation matrix” is incorporated in these expressions. It is shown that quantization effects can be minimized by properly designing the structure-transformation matrix. Simulation results are very promising and illustrate the design algorithm. Keywords— Digital filters, minimum noise, multiplier-free, quantization, state-space.

• Type: Conference
• Year: 2005
• Where: ISCAS
• Authors: Tamal Bose, Zhongkai Zhang, O. Chauhan, Miloje S. Radenkovic
• Keywords: Digital filters, ISCAS 2005, Noise Variance, State-space Digital filters