High Speed Reconfigurable FIR Filter using Russian Peasant Multiplier with Sklansky Adder

K Gunasekaran,M Manikandan

doi:10.19026/rjaset.8.1252

Abstract

The Reconfigurable FIR filters are commonly used digital filters which find its major applications in digital signal processing and multi-standard wireless communications. The Direct form of FIR filter used in DSP application which consumes more area and power. To overcome this problem Multiplier Control Signal Decision (MCSD) window schemes is incorporated into direct form FIR filter in order to dynamically change the filter order. Conventional reconfigurable FIR filter is designed using Russian Peasant Multiplier which consumes more area and delay due to poor performance of adder used in multiplication unit. In this study, modified reconfigurable FIR filter is designed to further reduce the area, power and time. In proposed Reconfigurable FIR filter, a Wallace adder is replaced by carry select adder with sklansky adder in Russian Peasant Multiplication technique. Hence, modified Reconfigurable FIR filter with carry select adder with sklansky adder consumes less area, delay and power than the conventional Reconfigurable FIR architecture with Russian Peasant Multiplication technique.

Highlights

Finite Impulse Response (FIR) filters are widely used as an effective tool in Digital Signal Processing (DSP) and Multimedia applications
Lee et al (2011) Multiplier Control Signal Decision window (MCSD) technique is incorporated into Reconfigurable FIR filter for attain low power and high speed applications
An area efficient and high speed Russian Peasant Multiplier is modified by replacing the carry select with sklansky adder instead of carry save adder used in multiplier

Summary

INTRODUCTION

Finite Impulse Response (FIR) filters are widely used as an effective tool in Digital Signal Processing (DSP) and Multimedia applications. For low power FIR filter architectures, number of input word-lengths and filter taps, different coefficients word length and dynamic reduced signal representations are widely used. In those works, the large overhead is incurred to support the reconfigurable schemes. Lee et al (2011) Multiplier Control Signal Decision window (MCSD) technique is incorporated into Reconfigurable FIR filter for attain low power and high speed applications This method is mainly used for dynamically change the filter order. The Reconfigurable FIR filter is modified by using carry select adder with sklansky adder instead of Wallace adder used in Russian Peasant multiplier to optimize the area, delay and power utilization. Simulation for proposed reconfigurable FIR filter is performed by ModelSim6.3c and Synthesis is carried out by xilinx10.1

METHODOLOGY

Method

CONCLUSION