Use of oversampled Σ-Δ modulator for analogue adaptive FIR filters based on LMS algorithm

Access Full Text

Use of oversampled Σ-Δ modulator for analogue adaptive FIR filters based on LMS algorithm

For access to this article, please select a purchase option:

Buy article PDF
£12.50
(plus tax if applicable)
Add to cart
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)
Add to cart

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

© The Institution of Electrical Engineers
Published

An adaptive FIR filter configuration which uses a Σ-Δ modulator as a front end is proposed for implementing the LMS algorithm in analogue form. The oversampled Σ-Δ modulator converts the filter input into a binary sequence, which can be readily delayed and multiplied with a shift register and on/off switching. Computer simulations show very good performance for such a hardware efficient configuration.

Inspec keywords: switched capacitor filters; least squares approximations; active filters; adaptive filters; modulators

Other keywords: LMS algorithm; shift register; sigma-delta modulator; SC filters; hardware efficient configuration; analogue adaptive FIR filters; oversampled Σ-Δ modulator; binary sequence

Subjects: Active filters and other active networks; Modulators, demodulators, discriminators and mixers

References

    1. 1)
      • Menzi, U., Moschytz, G.S.: `Adaptive switched-capacitor filters based on the LMS algorithm', Proc. ISCAS, May 1990, New Orleans, p. 2220–2223.
    2. 2)
      • J. Candy . A use of double integration in sigma-delta modulation. IEEE Trans. , 249 - 258
    3. 3)
      • B. Widrow , S. Stearns . (1985) , Adaptive signal processing.
    4. 4)
      • Mensi, U.: `Switched-capacitor realisierung von Estimations-Algorithmen für Adaptive Filter und MFSK-Empfanger', 1991, PhD Dissertation, Swiss Federal Institute of Technology, Zürich, Switzerland.
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19920475
Loading

Related content

content/journals/10.1049/el_19920475
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading