polyphase is a common class of pulse compression waveforms in the radar systems. oppermann code is one of the used codes with polyphone pattern. after compression, this code has little tolerant against doppler shift in addition to its high side lobe level. this indicates that the use of oppermann code is an unsuitable scheme to radars applications. this paper shows that the use of amplitude wei...

PURPOSE The goal of this paper is to extend our recently developed FBP (filtered backprojection) algorithm, which has the same characteristics of an iterative Landweber algorithm, to an FBP algorithm with the same characteristics of an iterative MAP (maximum a posteriori) algorithm. The newly developed FBP algorithm also works when the angular sampling interval is not uniform. The projection no...

This paper concerns the mean square error optimal weighting factors for multiple window spectrogram of different stationary and nonstationary processes. It is well known that the choice of multiple windows is important, but here we show that the weighting of the different multiple window spectrograms in the final average is as important to consider and that the equally averaged spectrogram is n...

This paper concerns the mean square error optimal weighting factors for multiple window spectrogram of different stationary and nonstationary processes. It is well known that the choice of multiple windows is important, but here we show that the weighting of the different multiple window spectrograms in the final average is as important to consider and that the equally averaged spectrogram is n...

Abstract Expressions for particle image velocimetry (PIV) mean error and variance are derived iterative deformation method algorithms. The analytical expressions explicitly account the role of in- out-of-plane displacements, displacement gradients, diameter, fill factor imaging sensor, noise, light sheet intensity distribution, seeding concentration, interpolation function used to deform PIV im...

Automatic beat tracking is challenging task, especially for audio music with time-varying meters. This study proposes a dynamic programming approach with positional weighting window to handle beat tracking with time-varying meters. In particular, the tempo curve is the reference to obtain correct beat positions. The weighting window is used to adapt bandwidth of tempo which reciprocal represent...

Systems using text windows to model word contexts have mostly been using fixed-sized windows and uniform weights. The window size is often selected by trial and error to maximize task results. We propose a non-supervised method for selecting weights for each window distance, effectively removing the need to limit window sizes, by maximizing the mutual generation of two sets of samples of the sa...

Spectral synthesis techniques often use the OverLap-Add method. But in the case of noise synthesis, both experiments and theory show that this method introduces intensity fluctuations which imply audible artifacts. We propose here new methods to avoid these variations. The first one consists in multiplying the resulting signal by another weighting window to compensate dynamic fluctuations. The ...

Abstract This paper proposes a novel design of software-defined matched filter (MF) for digital receivers synthetic aperture radar (SAR). The block diagram the proposed receiver is described in detail. purpose this to produce SAR pulse with higher compression ratio (CR) and lower side lobe level (SLL) than that produced by conventional MF. based on idea time windowing construct transfer functio...