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IEICE TRANSACTIONS on Fundamentals

Adaptive Optimization of Notch Bandwidth of an IIR Filter Used to Suppress Narrow-Band Interference in DSSS System

Aloys MVUMA, Shotaro NISHIMURA, Takao HINAMOTO

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Summary :

Adaptive optimization of the notch bandwidth of a lattice-based adaptive infinite impulse response (IIR) notch filter is presented in this paper. The filter is used to improve the performance of a direct sequence spread spectrum (DSSS) binary phase shift keying (BPSK) communication system by suppressing a narrow-band interference at the receiver. A least mean square (LMS) algorithm used to adapt the notch bandwidth coefficient to its optimum value which corresponds to the maximum signal to noise ratio (SNR) improvement factor is derived. Bit error rate (BER) improvement gained by the DSSS communication system using the filter with the optimized notch bandwidth is also shown. Computer simulation results are compared with those obtained analytically to demonstrate the validity of theoretical predictions for various received signal parameters.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E85-A No.8 pp.1789-1797
Publication Date
2002/08/01
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on Digital Signal Processing)
Category
Adaptive Signal Processing

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