Jelena D. Certic

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Digital filter design can be performed very efficiently using modern computer tools. The drawback of the numeric-based tools is that they usually generate a tremendous amount of numeric data, and the user might easily lose insight into the phenomenon being investigated. The computer algebra systems successfully overcome some problems encountered in the(More)
A simple tuning scheme that shifts the crossover frequency of the start-up IIR half-band filter pair to the desired location has been introduced recently. In this paper , the approximation of the tuning scheme is derived in a manner that makes this scheme suitable for fixed-point arithmetic. The effects of the approximation error to the frequency responses(More)
In this paper, we investigate the sensitivities of the magnitude responses for the two classes of two-channel IIR filter banks. The term class I denotes the IIR filter pair implemented as a parallel connection of two all-pass filters, whereas class II stays for the tapped cascaded interconnection of two identical all-pass filters. A simple tuning scheme(More)
A new filter class with variable cut-off frequency is designed based on elliptic filter sharpening technique. A higher order IIR filter with a sharp transition band is constructed by using several identical low-order EMQF (elliptic minimal Q-factors) filters and an additional compensating section. The stopband attenuation is achieved by cascading EMQF(More)
This paper presents two-channel and three-channel complementary filter banks self-adjusting to the power spectral distribution of its input signal. The filter banks are based on EMQF or Butterworth double-complementary filter pairs. The adjustment of the 3dB-crossover frequency is achieved by a simple tuning algorithm that is suitable for the EMQF and(More)
In this paper, we consider the application of a recursive half-band filter pair in the structure of two-channel filter bank, which is based on the frequency response masking (FRM) technique. The recursive filter pair is used as a complementary model filter pair, whereas the masking filters are linear-phase FIR filters. Efficient realization structures for(More)
Special events such as music festivals, sports etc are characterised as " high user density " where user behaviour is determined by the dynamics of the event. This is the reason that it is necessary for a mobile network operator to dimension its network based on maximum expected resource requirements instead on averaged values. Although special events are(More)
In this paper, we propose a novel approach for constructing the first-order differentiator. It has been shown recently that an efficient Finite Impulse Response (FIR) wideband differentiator can be synthesised when applying the multirate and Frequency-Response Masking (FRM) techniques. The overall signal processing task is shared between a very low-order(More)