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
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;
Conference_Titel :
Oversampling and Sigma-Delta Strategies for DSP, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19951379
