A novel approach to pitch estimation of speech signals using an adaptive lattice notch filter (ALNF) is proposed. Based on a good convergence property and an unbiased frequency estimate with respect to the noise variance, the pitch period is estimated using the ALNF. Simulation results have verified that the ALNF is very effective in estimating the pitch period of the given speech signal under ...

In this paper, rational orthogonal basis functions are introduced to realize cascaded-parallel structure of adaptive notch filters (ANF) in the case of identifying and separating multiple sinusoids from wideband signals. The structural orthogonality provides good tradeoff between convergence speed and computational complexity. A simplified mean square output error (MSOE) updating algorithm is d...

—The design of the nite impulse response (FIR) adaptive notch lter with controlled null width is expressed as a derivatively contrained quadratic optimization problem. The problem is then transformed into an unconstrained one by choosing a null matrix orthogonal to the derivative constraint matrix. In this paper, wavelet lters are employed to construct the null matrix. Taking advantage of the v...

A fully adaptive infinite impulse response notah filter in cascade form is proposed to detect and track multiple time-varying frequencies in additive white noise. Based on transformations for digital filters in the frequency domain, the filter results in a minimal number of parameters. In addition, a simple adaptive algorithm with good tracking and convergence properties is obtained by using al...

In this paper, the two dimensional (2D) digital notch filter design problem is investigated. First, we develop a simple algebraic method for 2D IIR notch filter design. This approach not only has closed-form transfer function but also satisfies bounded input bunded output ( ~ 1 ~ 0 ) stability condition. Next, we use Lagrange multiplier method to design 2D FIR notch filters. This design is opti...

We present experimental and finite-difference time-domain simulation studies on high pass filter (HPF) based on transverse electric (TE) mode, low pass filter based (LPF) on multiple slits, and tunable notch-filter based on single slit. The LPF and notch filter are carried out by using the metal slits positioned at the center of the air gaps in tapered parallel-plate waveguides (TPPWG).

This p,aper presents a method to analyze the steady-state characteristics of an adaptive notch filter, when the effects of finite precision arithmetic are taken into account. The reduction of these effects by means of error spectrum shaping is also discussed. Closed-form expressions for the steady-state mean square error of variable coefficient have been obtained Finally the results of computer...

Abstract— In this paper, Recursive least square (RLS) based complex Adaptive notch filter (ANF) using Steiglitz-McBride (SM) method is proposed to suppress the Radio frequency interference (RFI) in very-highspeed digital subscriber line (VDSL) systems. The proposed RLS-SM ANF converges fast and requires less computational complexity than the existing direct form constrained ANF using recursive ...

Abstract: The purpose of IIR notch filter is to remove Narrow Band Interference signal while leaving Broad Band Signal unchanged in communication system. This research paper presents a method for design of fixed notch filter at center frequency FO (90MHZ). We calculate two parametric values like pass band ripple &stop band attenuation by using mathematical modeling. For this purpose we have sel...

This paper presents a high performance notch filtering for real time suppression of power line interference in a general signal. The disturbing signal is suppressed using an optimal notch FIR filter with tunable notch frequency. The tuning of the filter preserves its selectivity, most importantly the specified attenuation at the notch frequency. One example and two Matlab functions demonstrate ...