Adaptive Optimization of Notch Bandwidth of an IIR Filter Used to Suppress Narrow-Band Interference in DSSS System(Speclal Section on Digital Signal Processing)
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概要
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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.
- 2002-08-01
著者
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NISHIMURA Shotaro
Department of Animal and Marine Bioresource Sciences Faculty of Agriculture Kyushu University
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Nishimura Shotaro
Shimane University
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Nishimura Shotaro
Laboratory Of Functional Anatomy Of Dmestic Animals Faculty Of Agriculture Kyushu University
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Mvuma Aloys
広島大学大学院工学研究科
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Aloys M
Shimane Univ. Matsue Jpn
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Aloys Mvuma
広島大学大学院工学研究科
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Aloys Mvuma
島根大学総合理工学部
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Hinamoto T
Graduate School Hiroshima University
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Hinamoto Takao
Hiroshima Univ. Higashi‐hiroshima‐shi Jpn
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Hinamoto Takao
Department Of Artificial Complex Systems Engineering Graduate School Of Engineering Hiroshima Univer
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Hinamoto Takao
Graduate School Of Engineering Hiroshima University
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MVUMA Aloys
Graduate School of Engineering, Hiroshima University
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