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This paper presents an iterative (turbo) channel estimation and turbo equalization when orthogonal frequency division multiplexing (OFDM) has been concatenated to space-time block code (STBC) over time-varying multipath Rayleigh fading channels. Based on the Kalman filter channel estimator, soft-input-soft-output (SISO) minimum mean square error (MMSE) equalizer and a maximum posterior probability...
An efficient algorithm for the contour data approximation and compression is presented and discussed in this paper. The contour inputs are represented in Cartesian coordinates. The contour input is processed and some of the vertices are chosen as the vertices of the contour polygon. We also discuss the main idea of the analysed approach and we will compare it with the Ramer and Triangle methods of...
Three different algorithms of contour extraction and image compression using low-pass filter (LPF) and high-pass filter (HPF) are presented and compared with Sobel and Canny edge detectors in this paper. The proposed algorithms used periodic Haar piecewise-linear (PHL) transform, discrete cosine transform (DCT) and Haar transform (HT). Effectiveness of the contour extraction for different classes...
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