Home // AICT 2013, The Ninth Advanced International Conference on Telecommunications // View article

Quantization Errors in Overlapped Block Digital Filtering Methods

Authors:
Mustafa Daloglu
Erchin Serpedin

Keywords: block filter; quantization noise; overlap-add; overlap-save;

Abstract:
In digital signal processing applications involving filtering long sequences, block filtering methods like overlap save and overlap-add are widely used. Like all finite-precision applications, overlap-save and overlap-add methods are also affected by quantization errors. The goal of this paper is to calculate and make a quantitative comparison of the overall quantization noise resulting from the two methods in terms of power (variance) of the quantization noise. Multiple quantization noise sources are taken into consideration in the computation of the variances. The calculations reveal that the overlap-add approach is more prone to quantization noise compared to the overlap-save approach due to the addition of overlapping sections between overlap-add output blocks.

Pages: 117 to 122

Copyright: Copyright (c) IARIA, 2013

Publication date: June 23, 2013

Published in: conference

ISSN: 2308-4030

ISBN: 978-1-61208-279-0

Location: Rome, Italy

Dates: from June 23, 2013 to June 28, 2013