This paper presents an adaptive digital resolution improvement method for extrapolating and recursive analog-to-digital converters (ADCs). The presented adaptively enhanced ADC (AE-ADC) digitally estimates the digital equivalent of the input signal by utilizing an adaptive digital filter (ADF). The least mean squares (LMS) algorithm also determines the coefficients of the ADF block. In this sch...

We present a new transform which, when applied to the denominator polynomial of the transfer function of an unstable multidimensional recursive digital filter (of a special class) will yield a stable polynomial with good preservation of the magnitude spectrum. In fact, the discrete Hilbert transform (DHT), used to stabilize 2-D and 1-D recursive digital filters, is a special case of the general...

New designs of recursive digital differentiators are obtained by optimizing a general fourth-order recursive digital filter over different Nyquist bands. In addition, another design of recursive digital differentiators is also obtained by optimizing the specified pole-zero locations of existing recursive digital differentiator of second-order system. Further, new designs of recursive digital in...

In this paper a time domain recursive digital filter model, based on recurrent neural network is proposed. This problem can be considered as a training procedure of two layer recurrent neural network. The proposed neural network training algorithm is based on determination of the sensitivity coefficients of the recurrent system. The dynamic model of two layer recurrent neural network described ...

With the development of more compact and efficient ways of implementing digital logic on a silicon chip, most of the signal processing is being performed in the digital domain. The design of an efficient configurable digital decimation filter is focused in work. The Cascaded Integrator-Comb (CIC) filters are used as decimation filter. The five stage CIC filter is proposed in this paper. It does...

Abstract The digital down converter (DDC) is used in the front-end of a multiple-antenna radar. This conversion requires several digital filters working at very high sample rates with low power consumption. The input sample rate is 160 MHz and the output sample rate is 40 MHz. To find suitable filter structures for the implementation of the DDC, several filter structures were evaluated. Both re...