Paper Info
Title
Linear-Phase VDF Design With Unabridged Bandwidth Control Over the Nyquist Band
Abstract
This brief presents a low-complexity linear-phase variable digital filter (VDF) design with tunable lowpass (LP), highpass (HP), bandpass (BP), and bandstop (BS) responses anywhere over the entire Nyquist band. The spectral-parameter-approximation-based VDFs (SPA-VDFs) was designed using the Farrow structure and has advantages of linear phase, lower group delay, and fewer variable multipliers. However, the total gate count and the dynamic range of filter coefficient values of SPA-VDFs significantly increase with the tunable range of cutoff frequency, which limits their usefulness in emerging signal processing and wireless communication applications. In addition, existing VDFs need to update either filter coefficients or need parallel filter structures to obtain variable LP, HP, BP and BS responses. In this brief, a new VDF design is proposed by deftly integrating SPA-VDF with the modified coefficient decimation method (MCDM), and it will be referred to as SPA-MCDM-VDF. The SPA-MCDM-VDF provides LP, HP, BP, and BS responses with unabridged center frequency and bandwidth control over the entire Nyquist band without the need for hardware reimplementation or coefficient update. The complexity comparisons show that the SPA-MCDM-VDF offers substantial savings in gate count, group delay, and number of variable multiplications over other linear-phase VDFs.
Year
DOI
Venue
2014
10.1109/TCSII.2014.2319992
Circuits and Systems II: Express Briefs, IEEE Transactions  
Keywords
Field
DocType
circuit tuning,digital filters,frequency response,integration,linear phase filters,BP response,BS response,Farrow structure,HP response,LP response,MCDM,Nyquist band,SPA-MCDM-VDF,SPA-VDF deft integration,SPA-VDF filter coefficient value,bandpass response,bandstop response,coefficient update,cutoff frequency tunable range,dynamic range,emerging signal processing,filter coefficient,gate count,group delay,hardware reimplementation,highpass response,low-complexity linear-phase variable digital filter design,lower group delay,modified coefficient decimation method,parallel filter structures,spectral-parameter-approximation-based VDF,total gate count,tunable lowpass response,unabridged bandwidth control,unabridged center frequency,variable multiplier,wireless communication application,Modified coefficient decimation method (MCDM),spectral parameter approximation (SPA),variable digital filter (VDF)
Linear phase,Root-raised-cosine filter,Anti-aliasing filter,Control theory,High-pass filter,Electronic engineering,Low-pass filter,Bandwidth (signal processing),Mathematics,Voltage-controlled filter,Filter design
Journal
Volume
Issue
ISSN
61
6
1549-7747
Citations 
PageRank 
References 
2
0.38
0
Authors
5
Name
Order
Citations
PageRank
Sumit Jagdish Darak13616.39
A. Prasad Vinod232850.06
Edmund Ming-Kit Lai312058.89
Jacques Palicot437551.91
Honggang Zhang51223108.55