OFDM (Orthogonal Frequency Division Multiplexing) transmissions are arising as important modulation techniques because of its robustness against interference. Various modulation schemes have been used to implement OFDM. In this paper, the OFDM transceiver system is implemented using MATLAB. Gaussian Minimum Shift Keying modulation technique has been implemented in the proposed OFDM. The bit err...

Abstract We confirm Flandrin’s prediction for the expected average of local maxima spectrograms complex white noise with Gaussian windows (Gaussian or, equivalently, modulus weighted Entire Functions), a consequence conjectured double honeycomb mean model network zeros and maxima, where area centered hexagons is three times larger than zero hexagons. More precisely, we show that spectrograms, n...

There are many unavoidable noise interferences in image acquisition and transmission. To make it better for subsequent processing, the noise in the image should be removed in advance. There are many kinds of image noises, mainly including salt and pepper noise and Gaussian noise. This paper focuses on the research of the Gaussian noise removal. It introduces many wavelet threshold denoising alg...

The performances of two perceptual properties of the peripheral auditory system, synaptic adaptation and two-tone suppression, are compared for automatic speech recognition (ASR) in an additive noise environment. A simple method of synaptic adaptation as determined by psychoacoustic observations was implemented with temporal processing of speech utilizing a zero-crossing auditory model as a pre...

A cyclostationary Gaussian linearization method is formulated for investigating the time average response of nonlinear system under sinusoidal signal and white noise excitation. The quantitative measure of cyclostationary mean, variance, spectrum of mean amplitude, and mean power spectral density of noise are analyzed. The qualitative response behavior of stochastic jump and bifurcation are inv...

The performance of a communication system with wavelet packet division multiplexing in an environment of white Gaussian noise and narrowband interferences is studied. Wavelet packet transforms and their place for generation and detection of communication signals in this paper are examined. They are examined as an alternative of multi-frequency systems and particularly OFDM. The frequency effici...

High rate serial-data technologies require that receivers be tested under the stress of calibrated levels of Gaussian Random Jitter (RJ) and/or voltage noise. Every standard assumes that noise follows a Gaussian distribution with a white frequency spectrum. Several emerging standards require that stress signals used to test receivers be filtered, PCI Express Gen 2 requires two separately filter...