Adaptive optimization of notch bandwidth of an IIR filter used to suppress narrow-band interference

Author

Mvuma, Ahys ; Nishimura, Shotaro ; Hinamoto, Takao

Author_Institution

Graduate Sch. of Eng., Hiroshima Univ., Japan

Volume

5

fYear

2002

fDate

2002

Abstract

Adaptive optimization of the notch bandwidth of a lattice based adaptive infinite impulse response (IIR) notch filter is presented. The filter is used to improve the performance of a direct sequence spread spectrum binary phase shift keying (DSSS BPSK) communication system by suppressing the narrow-band interference at the receiver. A least mean square (LMS) algorithm used to adapt the notch bandwidth coefficient to its optimum value that corresponds to the maximum signal to noise ratio (SNR) improvement factor is derived. Bit error rate (BER) improvement gained by the system using the optimized filter is shown by analytical and computer simulation.

Keywords

IIR filters; adaptive filters; circuit optimisation; circuit simulation; error statistics; interference suppression; lattice filters; least mean squares methods; notch filters; phase shift keying; spread spectrum communication; DSSS BPSK communication system; IIR filter; adaptive optimization; analytical simulation; bit error rate improvement; computer simulation; direct sequence spread spectrum binary phase shift keying communication system; lattice based adaptive infinite impulse response notch filter; least mean square algorithm; maximum signal to noise ratio improvement factor; narrow-band interference suppression; notch bandwidth; notch bandwidth coefficient; optimized filter; Adaptive filters; Bandwidth; Binary phase shift keying; Bit error rate; IIR filters; Interference suppression; Lattices; Narrowband; Signal to noise ratio; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010710

Filename

1010710