DocumentCode
3449121
Title
Implementing adaptive DSP algorithms using oversampled sigma delta strategies
Author
Juni, J. ; Stewart, R.W.
Author_Institution
Signal Process. Div., Strathclyde Univ., Glasgow, UK
fYear
1995
fDate
35026
Firstpage
42614
Lastpage
42622
Abstract
We present novel oversampled implementations of adaptive LMS FIR filters using sigma delta (ΣΔ) computation strategies. Using this approach in conjunction with ΣΔ DACs and ADCs the need for expensive decimation and interpolation stages for the ΣΔ codec has been circumvented. Hence the complete architecture can make considerable savings in total silicon area for a mixed signal ASIC implementation. The LMS algorithm performance of the ΣΔ approach is shown to be comparable to the traditional Nyquist rate PCM LMS algorithm
Keywords
FIR filters; adaptive filters; adaptive signal processing; codecs; digital signal processing chips; digital-analogue conversion; filtering theory; least mean squares methods; mixed analogue-digital integrated circuits; sigma-delta modulation; signal sampling; ΣΔ ADC; ΣΔ DAC; ΣΔ codec; ΣΔ computation; LMS algorithm performance; Nyquist rate PCM LMS algorithm; adaptive DSP algorithms; adaptive LMS FIR filters; mixed signal ASIC; oversampled sigma delta strategies; sigma delta computation;
fLanguage
English
Publisher
iet
Conference_Titel
Oversampling and Sigma-Delta Strategies for DSP, IEE Colloquium on
Conference_Location
London
Type
conf
DOI
10.1049/ic:19951379
Filename
494853
Link To Document