Amplitude Modulator Circuits

A sequence of examples is provided that demonstrate how S-parameter measurements can be made and utilized to design a radio frequency amplifier.An HP (now Agilent) 8505A system controlled by MATLAB is used to characterize a bipolar transistor in terms of its S-parameters. These measurements are...

The Matlab code investigates the harmful effects of high power amplifier on ofdm signals.It is imagined that the amplifier destroy the amplitude of the transmitted signal due to saturation and has no effect on the signal phase. The model is acceptable for solid state amplifier to some extend.

gmsk modulation of numerical data generated by a random source, the output of the modulator give two signals, only for demonstration, the first is gmsk signal and the other is gaussien frequency pulse shape


Platforms: Matlab

This toolbox includes a complete set of blocks implemented in the Simulink environment, which allows designers to perform time-domain behavioral simulations of switched-capacitor sigma-delta modulators.The proposed set of blocks takes into account most of the SC sigma-delta modulator...


Platforms: Matlab

3D Array Factor of a 4x4 planar array antenna calculated using general formulas and then plotted in 3D format."AB" shows the excitation amplitude of the elements and "AB_phase" shows their phases.Elements are placed on the x and y axis and element factor is ignored. The code can easily be...


Platforms: Matlab

An Advanced Simple Configuration Delta-Sigma Modulation Three-Phase Inverter Implementing Space Voltage Vector Approach. To miniaturize and enhance the performance of a variety type of switching mode inverters and converters, researchers have developed with great efforts so far. In these...


Platforms: Matlab

The pulse generator included in Simulink does not provide the ability to programmatically set the parameters. This block provides inputs that allow the amplitude, pulse width, and pulse period to be set. It's fairly simple, but wasn't obvious to me so I thought I'd share it.


Platforms: Matlab

See the paper describing the model at:Wireless LAN Comes of Age: Undersanding the IEEE 802.11nAmendment by Thomas Paul and Tokunbo Ogunfunmi,IEEE Circuits and Systems Magazine, First quarter 2008,pp. 28-54. 2008.See the paper describing the model in IEEE Xplore...


Platforms: Matlab

Important Note: This model could only be compatible with MATLAB 7(R14) and CCS 2.21. It might work for other versions of MATLAB & CCS but for that Sampling Rates & data types of various simulink blocks might have to be adjusted (changed) to obtain optimum performance & best ResultThis model can...


Platforms: Matlab

Randomly generated information is modulated using 16 QAM and passed through Rayleigh fading channel and AWGN is added.PSAM (pilot symbol assisted modulation)i.e pilot symbols are inserted into sequence of information symbols periodically is done before transmission inorder to estimate channel...


Platforms: Matlab

HARMASYLLABLESEG - Segments a signal stored in a WAV file into individual syllables. Also graphs the spectrogram and signal with syllables highlighted in red to show what parts of the signal contain syllables. INPUT: - FILENAME: The path to a signal stored in WAV format. The following arguments...


Platforms: Matlab

These files just to simulate or demo M-QAM modem in case BER, channel model, signals in t and f domain.Overal proses from bit insertion at modulator to bit estimated in demodulator. We can see the change of signal in each block diagram.


Platforms: Matlab

The file is written for MATLAB 6.5 it aquires data from the sound card . Fourier spectral power analysis one second of audio signal sample is analyzed by simply running the M-file. The frequency contents of the voice analyzed are shown of a plot. I have used this program to compare voice...


Platforms: Matlab

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.


Platforms: Matlab

This is a simple program written so the equations look like classical matrix equations and it solves the voltage out of the standard current driven loop filter. This is intended to be used in some future PLL analysis program, but it outlines the way to set up the equations, and solve them. There...


Platforms: Matlab

It is a training with sinusoidal input signal to sinusoidal relaxation oscillator VI1 with simulink.Students in computer science can take input Asinwt and get variation A amplitude and frequency w=3.14*F and set curve input/output.


Platforms: Matlab

The signals presented here can be used in demonstrating how the signal varies when the operation is made on either independent variable or dependent variable. The parameters can be varied to have a feel of the variation.Example(1): rect(1,2) plots the rectangular signal of amplitude 1 and a width...


Platforms: Matlab

findFFT returns fft amplitude and frequency vectors from input data, with options to return normal fft, zeropadded fft, windowed fft, or both windowed and zeropadded to remove spectral leakage.IN data - vector containing information to perform fft on '-sampFreq',## - inputs sampling frequency of...


Platforms: Matlab

Frequency response signal analyzer for linear and non-linear control loops and dynamic systems. Simulink model. Sine sweep based similar to dynamic signal analyzers for physical systems. User specifies: freq limits, freq decrement, averages, phase criteria for moving to next frequency, start...


Platforms: Matlab

Sigmoid creates a Sigmoid function using parameters in PARAMS and the variable range. V = SIGMOID(PARAMS,RANGE) PARAMS: a 3-vector, the entries of which are (in this order): amplitude value phase slope


Platforms: Matlab