We study the response of two generic neuron models, the leaky integrate-and-fire (LIF) model and the leaky integrate-and-fire model with dynamic threshold (LIFDT) (i.e., with memory) to a stimulus consisting of two sinusoidal drives with incommensurate frequency, an amplitude modulation ("envelope") noise and a relatively weak additive noise. Spectral and coherence analysis of responses to such...

This paper deals with modulation classification under the alpha-stable noise condition. Our goal is to discriminate orthogonal frequency division multiplexing (OFDM) modulation type from single carrier linear digital (SCLD) modulations in this scenario. Based on the new results concerning the generalized cyclostationarity of these signals in alpha-stable noise which are presented in this paper,...

This diploma thesis evaluates the performance of differential modulation applied to the 3GPP Long Term Evolution downlink. The focus specifically lies on single input single output transmissions with only one user. The Long Term Evolution downlink is based on channel estimation. The reference symbols, required for channel estimation cannot be used to transmit data, which reduces the spectral ef...

Abstract We propose a single channel blind source separation algorithm for convolutively mixed linear frequency modulation (LFM) signals based on smoothed Wigner-Ville distribution (SWVD) time-frequency analysis, Canny edge detection, and Hough transform detection. First, the SWVD analysis diagram is obtained as an image LFM characteristics. Second, detection performed image. Then, used to dete...

Optical pumpmg experiments have been performed on helium 4 atoms in the metastable level 2 with the object of studying the modulation of light in absorption in the longitudinal and transverse beams. Magnetic resonance curves were obtained similar to those found, in emission in double-resonance experiments. With a part~cular geometrical arrangement employing circular polarizers, the Bloch magneb...

This study investigates a multistream phone recognition system, which consists of 21 parrallel sub-systems, each covers two critical bands, and fused by a multi-layer perceptron (MLP) system. Within each band, speech information is encoded by the frequency-domain linear prediction (FDLP) feature, which characterizes the temporal modulation of subband envelope. Two experiments are conducted to d...

The technical layout and initial results of an experiment to generate narrow-band, coherent, tunable terahertz (THz) radiation through the down-conversion of the frequency of optical lasers using a laser-modulated electron beam are described. In this experiment, a 120 MeV electron beam is first energy modulated by two lasers with different wavelengths. After passing through a dispersive section...