Adaptive signal processing in subbands using sigma-delta modulation technique

Author

Lin, L. ; Aboulnasr, T.

Author_Institution

Ottawa-Carleton Inst. of Electr. Eng., Ottawa Univ., Ont., Canada

Volume

iii

fYear

1994

fDate

19-22 Apr 1994

Abstract

In this paper, a sigma-delta modulated subbanded adaptive interference/noise cancellation system is proposed. The filter bank is fully modulated, and the adaptive filter is partially modulated. Maintaining the modulated signal representation throughout results in considerable savings in complexity. By computer simulations, the system performance is compared to the non-modulated case regarding complexity, convergence speed and steady-state error. The effect of the oversampling rate used in modulation as well as the quality of the demodulator are also considered. The paper concludes by highlighting the tradeoffs between the hardware complexity reduction and the overall system performance

Keywords

FIR filters; adaptive filters; adaptive signal processing; computational complexity; convergence; error analysis; interference suppression; sigma-delta modulation; adaptive filter; adaptive interference/noise cancellation system; adaptive signal processing; computer simulations; convergence speed; filter bank; hardware complexity reduction; modulated signal; oversampling rate; sigma-delta modulation technique; steady-state error; subbands; system performance; Adaptive filters; Adaptive signal processing; Computer simulation; Convergence; Delta-sigma modulation; Filter bank; Interference; Noise cancellation; Signal representations; System performance;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on

Conference_Location

Adelaide, SA

ISSN

1520-6149

Print_ISBN

0-7803-1775-0

Type

conf

DOI

10.1109/ICASSP.1994.390063

Filename

390063