Paper data
Title:
Multiplierless implementation of allpole digital filters using a lowsensitivity structure Author(s): Bhattacharya Mrinmoy, Institute of Signal Processing, Tampere University of Technology Saramäki Tapio, Institute of Signal Processing, Tampere University of Technology Page numbers in the proceedings: Volume I pp 687690 Session: Filter Design
Paper abstract
Multiplierless filters are natural extensions of the lowsensitivity structures. Some lowsensitivity structures are associated with structural alteration and the resulting multiplier coefficients are different than the initial designed values in these structures. For the cases when coefficient values are quite small, they can be implemented in a multiplierless manner, i.e., by using only few bit shifts and adds and/or subtracts, by converting them to minimum signed powersoftwo (MNSPT) or canonic signed digit (CSD) forms, and the number of nonzero bits required for coefficient representations are quite low. This paper investigates a lowsensitivity unconventional structure that is very suitable for implementing allpole digital filters. Further, accepting a marginal deviation from the given specifications, the required number of nonzero bits becomes very low, making the overall implementation attractive. Also, one can start with a filter with marginally stricter specifications without increasing the filter order. Then, the modified coefficient values are quantized such that the given overall criteria are still met.
Paper
