Quantitative descriptions of the cellular transformations from behaviorally relevant inputs into temporal patterns of firing are crucial for understanding information processing in systems of neurons and for incorporating biological properties of neurons into models of the neural control of behavior. To understand how neurons that mediate vestibulo-ocular behavior transform their inputs into te...

Significance Modulation instability (MI) is a ubiquitous phenomenon in physics, corresponding to the growth of weakly modulated continuous wave nonlinear medium and leading generation large-amplitude periodic train. In space, it transforms plane waves into spatially patterns. frequency domain, MI result energy transfer from strong single spectral component sidebands. While linear stability anal...

Defocusing effects in modulation transfer function (MTF) measurement of charge coupled device (CCD) cameras is the main focus of current paper. We introduce measuring Point-spread function (PSF) in order to calculate the MTF and further more we will study the shape of MTF and its cut-off frequency by adjusting the lens focusing in different locations. A collimated white light LED by broadband s...

A generalization of frequency modulation is developed in which state trajectories of dynamical systems are used as carrier waves. Our focus is on the design and analysis of modulators and demodulators for such generalized frequency modulation systems. In particular, we show that for a class of dynamical systems, among which are certain chaotic systems, it is possible to develop a general approa...

Continued investigation of Tamed Frequency Modulation (TFM) has led to an extension, called Generalized Tamed Frequency Modulation (GTFM). The features of GTFM are based on the possibility to select different combinations of parameters which characterize the process of waveform generation. This still allows for the generation of a constant envelope modulated signal with a spectrum similar to TF...

The action diiusion of an area preserving map, whose linear frequency is stochas-tically perturbed, is described by a Fokker-Planck equation with a coeecient obtained from the normal form. The local properties are investigated on the standard map and the angle is shown to have a fast relaxation. A comparison is made with the diiusive process determined by a slow periodic modulation of the frequ...

The traditional approach of improving radar range resolution using a linear frequency modulated chirp signal requires the full width of the frequency spectrum, which is not feasible in the UHF band due to interference or frequency allocation for other purposes. In this study a linear frequency modulated chirp signal is approximated using two stepped-frequency pulse train waveforms, a continuous...

Abstract Aiming at the problem of estimation hybrid modulated signal combining Binary Phase Shift Keying and Linear Frequency Modulation (LFM-BPSK), existing methods have low accuracy in SNR. To solve this problem, algorithm based on Born-Jordan time-frequency distribution (BJD) is proposed, which uses Hough transform (HT) to estimate initial frequency chirp rate LFM-BPSK signal, then estimates...