The .m file simulates a Spread-Spectrum Modulation Trx/Rcx system, in which, the phase of the pseudo-random sequence generated in the transmitter and used to encode the data stream is unknown a priory at the receiver.A parallel search strategy is employed to locally determine it in the place. It works as here: selecting the maximam-energy low-pass filtered signal of the set of all hypothesied despreaded ones using different hypothesized phases...
random_band is the main program and it outputs a test signal which has a constant level. The instanatenous frequency varies randomly within the specified Nth octave band range.
The program outputs three plots: time record of the...
Again I'm uploading my homework...
This is a GUI which enables to load images and train a Hopfield network according to the image. You can run the network on other images (or add noise to the same image) and see how well it...
This function can be used for adding different kind of impulse noises (i.e. Salt & Pepper noise and Random-value impulse noise) to image. Salt & Pepper Noise values are 0 or 255 but random-value impulse noise values vary from 0 to...
The PRBS are based on 3 to 9 bits memory delays and put out 2^3 -1 to 2^9 -1 binary sequence length. Usage: these generators can be used in process identification as noise source on command signal
Performs watermarking of the input image by decomposing the image using haar wavlet. Noise generated with normal distribution is used as the key and is added to the input image to obtain the watermarked image.
Fast Algorithm estimating the number of sinusoids in a white Gaussian noise. This algorithm use a sub-space method based on chi-square statistics of eigen values of the Autocorrelation Matrix.
Example :
clear, close all...
addnoise(A,sz) A: image matrix sz: noise ratio (0 to 100) of the image
This function take an image and noise ratio then output a grayscaled image with uniform noise.
The uniform noise ranged from 0 to 255.
From GUI we can generate random binary data, modulate them in frequency, add noise to the modulated signal and final demodulate received signal. Also it's possible to view some performance of the system.
we had generated a signal and the we generated a random noise and add it to the signal,,then my using the lms algorithm we tried to cancel the effect of the noise on the signal and have the original signal back pure as possible
The AWGN Channel Block in the Communications Blockset lets you specify SNR in several ways, including Eb/No. Sometimes people want to use a more itemized way of specifying the SNR, like the itemization found in a link budget.
These two...
The m-file investigates the effects of high power amplifier and the channel noise on the OFDM signal and then introduces clipping as a PAPR reduction method to reduce the HPA effect.
A collection of utilities for computing the impact propagation disturbances on satellite radio transmissions. Applications include frequency and temporal coherence estimates and examples that use waveform simulations. Models for common fading...
Software described in and associated with the paper
"Numerical algorithms and issues concerning the discrete-time optimal projection equations for systems with white parameters", Proceedings UKACC International Conference on...
In this program, MSE, Step size, Bit rate, Quantization Noise are also calculated
This program converts the noise sidebands to power, adds in an estimate of the power for CW spurs, then calculates the jitter from this. It is not really exact, but it is simple and allows for an easy estimate of the jitter and phase noise without...
A uniform random number generator is used to generate the binary information sequence from the binary data source. The sequence of d-de?0d-deOaos and d-de?1d-deOaos is mapped into sequence of +E and d-deOCtE where E represents the signal...
The spectral Subtraction Method for enhancement of noisy speech signals proposed by Boll 79. The method implements spectral averaging and residual noise reduction proposed in the paper. Note that the first 0.25 sec of the speech signal is assumed...
This file improves on the functionality of interp1 and allows the resampling of more complex data. Measurements can be taken completely arbitrarilly and need not be unique.
Target uses are for data which is sampled against a signal that...
This file sets up a simulation environment for analyzing receive systems, gives a basic example, and checks that the results reflect the setup. It is handy because it allows the basic simulation environment to be specified quickly and easily,... |