A reconfigurable FIR filter architecture to trade off filter performance for dynamic power consumption

Seok Jae Lee, Ji Woong Choi, Seon Wook Kim, Jongsun Park

    Research output: Contribution to journalArticlepeer-review

    42 Citations (Scopus)

    Abstract

    This paper presents an architectural approach to the design of low power reconfigurable finite impulse response (FIR) filter. The approach is well suited when the filter order is fixed and not changed for particular applications, and efficient trade-off between power savings and filter performance can be made using the proposed architecture. Generally, FIR filter has large amplitude variations in input data and coefficients. Considering the amplitude of both the filter coefficients and inputs, the proposed FIR filter dynamically changes the filter order. Mathematical analysis on power savings and filter performance degradation and its experimental results show that the proposed approach achieves significant power savings without seriously compromising the filter performance. The power savings is up to 41.9% with minor performance degradation, and the area overhead of the proposed scheme is less than 5.3% compared to the conventional approach.

    Original languageEnglish
    Article number5640702
    Pages (from-to)2221-2228
    Number of pages8
    JournalIEEE Transactions on Very Large Scale Integration (VLSI) Systems
    Volume19
    Issue number12
    DOIs
    Publication statusPublished - 2011 Dec

    Bibliographical note

    Funding Information:
    Manuscript received January 28, 2010; revised June 19, 2010 and August 20, 2010; accepted September 19, 2010. Date of publication November 18, 2010; date of current version October 28, 2011. This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0004484) and in part by a Korea University Grant.

    Keywords

    • Approximate filtering
    • low power filter
    • reconfigurable design

    ASJC Scopus subject areas

    • Software
    • Hardware and Architecture
    • Electrical and Electronic Engineering

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