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In the earlier work authors have shown that prior knowledge neural approach can be successfully applied for bias dependent noise modelling of microwave transistors, which is very applicable in the cases where there are no enough data to develop pure black-box neural models. In this paper the mentioned model is extended to a class of devices made in the same technology but differing in the gate width...
This paper presents a new algorithm to suppress impulse noise in still images, which allows removal of up to 90% noise. The paper is focused on two directions: performance evaluation of the new algorithm comparing with existing algorithms and evaluating the possibility to implement this algorithm in real time, for video clips, using the family of digital signal processors BF5xx signal (Analog Devices...
Swept sine technique is one of the most used techniques for measurement of the impulse responses of the acoustical systems including rooms. It uses a swept sine as an excitation signal. During its application, some disturbance, such as noise, could reduce the quality of the measurement results. Two different categories of noise can be distinguished - background and transient noise. In this paper,...
This contribution describes bridge symmetric crystal oscillator. A selective component of the oscillator is realized as Wheatstone bridge with two identical crystal resonators. An amplifier of this oscillator is realized as a symmetrical differential amplifier. Oscillator is especially solved with a view to achieve minimal phase noise of generated signal. Results are compared with common Gouriet-Clapp...
This paper presents an innovative technique that identifies the most significant paths of the multipath channels based on the Last Mean Square (LMS) and Normalized Least Mean Squares (NLMS) algorithms applied to RAKE receiver. Simulations have been carried out for a DS-CDMA signal with QPSK modulation, and the performances have been evaluated in terms of the number of taps detected as a function of...
In this paper, the general formulas which relate the analytical expression for the fundamental frequency signal and the in-band distortion components to the order of a power amplifier (PA) polynomial modelare derived. A robust method for estimation of coefficients of nonlinear model is presented and applied to a particular amplifier in an impulsive noise environment. Such nonlinear models are used...
The true random binary sequence generator provides a secure, non-reproducible source of true random binary sequences for applications with strong security requirements, such as for generating encryption keys and for secure communications. In this paper we present a realization of true random binary sequence generator. Thermal noise found in chaotic physical system is used as a source of true randomness...
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