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12 views

MIMO Maximum Likelihood receiver USING 4-qam

I am simulating a maximum likelihood receiver for a 2x2 MIMO system using BPSK. However, my simulation results seem to be unlike results I've seen elsewhere, such as: BPSK, 2x2 ML Receiver. Matlab ...
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1answer
53 views

PID gains from the transfer function of a plant

I am trying to calculate gains ( Kp, Ki, Kd ) of a PID controller. I have to improve the response of a plant. I already have the Transfer function of the plant. I was wondering if matlab has some ...
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2answers
78 views

How do I transmit an FM signal from the VGA_R port on the DE2-115?

The best reference for my question would be this youtube video: https://www.youtube.com/watch?v=4VW017qPT6Y I'm trying to do exactly what they did with the following resources: Matlab 2013a with ...
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3answers
115 views

How to obtain sine wave back after fft?

I performed fft in matlab on y=sin(2*pi*t), with a time period of T=0.015. Now I want to get the original function back in the time domain, but I'm not sure how I can use ifft to do that. It gives me ...
2
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1answer
39 views

Interfacing Matlab with a NI real time target (cRIO 9073)

I currently have a control system implemented in Matlab that controls a vehicle. The tracking is performed using an overhead camera, and commands are sent to the vehicle via xbee. I have now added a ...
2
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0answers
59 views

I need to calculate the average power spectral density after passing packets through a butterworth filter using MATLAB

I am trying to generate 100 packets(row vectors each of size 8192) of random bits(1,-1),filter them using butterworth filter and then plot their average power spectral density. I have to do this ...
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0answers
113 views

Plotting reflection coefficient magnitude vs frequency in MATLAB

I am trying to plot a function (t) with respect to w in MATLAB. However, the output that I am seeing is showing 0 for all w within the defined range. This is not what I am supposed to be seeing. The ...
2
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1answer
96 views

How to interpret this bode diagram

I have this bode diagram. I am wondering how to interpret this. We start off with 90 degree phase lag e.g. a integrator. Then at approx 12 Hz we drop another 180 degrees indicating two integrators. ...
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1answer
52 views

Accurate frequency output through external speaker

I'm creating an application where I want to output a constant frequency through a speaker to test the frequency range of a microphone device I've developed. The problem is, my application measures ...
1
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1answer
47 views

Measurement system with MATLAB real-time windows target and NI PCI boards

I'm setting up an experiment which employs MATLAB real-time windows target and NI PCI-6229 and carrier SC-2345 board while I'm wondering about the hardware's compatibility It's given from here ...
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0answers
173 views

FFT Analysis using powergui (SimPowerSystem)

How to do FFT analysis using powergui tool available in matlab
2
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2answers
183 views

Why my full-wave bridge type diode rectifier circuit begins an analysis from 8. second on Matlab Simulink?

Hi, I am working on Matlab Simulink's work page to get full-wave and half-wave bridge-type-diode rectifiers as could be seen in the picture. But, according to my Scope2 screen when I double clicked ...
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1answer
320 views

Simulating a Flyback converter using Matlab / Simpowersystems, cannot get it to work, any tips?

I have created a flyback converter model using Simpowersystems in Simulink/Matlab. But it always gives me the wrong answer! I have simulated the same system using PLECS and Simscape/simulink and got ...
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0answers
24 views

How to use rank 1 covariance matrix for designing a kalman filter

I was trying to estimate the covariance matrix of the measurement noise of a (simulated) MIMO system. Turns out. In matlab cov(data) gives me a rank 1 matrix. I checked it. And I noticed that all ...
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1answer
89 views

Affine Non Autonomous State Space system

Normally We all know the state space model of the the form der(x) = F*x(t)+G*u(t) y = H*x(t)+J*u(t). However I came across a state space model which has the following form der(x) = F*x(t)+G*u(t) + ...
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0answers
29 views

Statistical signal modeling in Matlab

I want to build a detector of sorts. Say I have a bunch of signals and they all share some patterns, like some peaks in frequency or something more complicated that I can't bother to calculate by ...
3
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1answer
142 views

How can I high pass (DSP) filter a low frequency signal without introducing lag?

I need to high pass filter a signal, and my design just isn't cutting it. The part that's making it tricky is that I can't tolerate lag. I am sampling at 20Hz, the signal I care about is 1/12 to ...
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3answers
238 views

Describing step response in terms of poles and zeros of transfer function?

me and a friend are stuck describing something, we're both coming to terms with using matlab and we're trying to understand the design of a simple control system for controlling the steady-state error ...
2
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0answers
181 views

Kalman filter on linear acceleration for distance

In my application to calculate displacement from motion of accelerometer, I am using kalman filter to improve the displacement accuracy. Please note I am aware of ineffectiveness of acceleration for ...
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1answer
112 views

use ADSL modem like a analog to digital converter

How to input a signal to a ADSL modem (in phone line input) that such a simple sinusoidal signal and get same signal by computer ? ADSL modem connected by network cable and usb cable is The software ...
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1answer
85 views

Discrete Time Integrator (VS) Continuous Integrator

I am trying to Model control for a Micro-controller which (under Real Time Development) does not support Continuous time solver. So, instead i have to use Discrete Time Solver. How do i replace SECOND ...
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1answer
107 views

How to interpret a Current Value into a PWM signal percentage?

I have a maltab model, output of which (from an RL circuit) is a value for current. I want to interpret this value of current into a PWM signal with frequency of 1000Hz and duty cycle of 50%. I have ...
4
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1answer
911 views

MATLAB to VHDL conversion

How to convert any MATLAB code(.m file) to VHDL(.hdl code). As i have to use my image processing code in a FPGA kit. Any solution? Possible method: Using hdl coder in simulink, converting the ...
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0answers
77 views

Long Transmission line

Can we model a long transmission line in simulink matlab using PI sections? Or we have to simulate it using equations in matlab function?
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0answers
173 views

Not getting pure sine wave in simulnik matlab

I should be getting a pure sine wave. But it shows sine wave that is peak at top, and not smooth.So what should be the error. It shows following warning ...
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2answers
198 views

Matlab audio signal through audiometer

I am very new to audio processing and I am using matlab to produce a signal to be presented through an audiometer. The way I am doing it is as follows: 1) Set the dB amplitude level in my GUI to 0dB ...
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3answers
331 views

Audio Signal dB levels Matlab

I am trying to develop a GUI in MATLAB to allow the presentation of a tone. One of the input parameters is the dB the user wants. So the way I tried to do this is: y = factor * sin (2*pi*500*t); ...
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1answer
129 views

Removing noise on Matlab

I chose a sine signal, let's say : Us=2*sin(2*pi*Fs*t) with Fs=800 ! Then I introduced a random noise to this signal. The aim of my program is to increase the SNR. The first method was to increase ...
2
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1answer
142 views

phase estimation from I and Q

let say I have a discrete sine signal. I build the I and Q channel according to sampling with a frequency 4*time the signal frequency. that means multiplying the signal with [1 1 -1 -1.....]. in ...
3
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2answers
314 views

Amplitude Modulation Concepts

I am currently learning about telecommunications but I have some concept issues. Firstly, does it matter if I am using cosine or sine in the equation? I understand that they are basically the same ...
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1answer
393 views

How to control an LED light by the output of a matlab program?

In my project, I'm designing the software to control a door using fingerprints, so I have 2 possible outputs: 1-door open, 2-door not open. I need to change this output to an LED as an example (red ...
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1answer
201 views

Why is MATLAB used so much in industry when there's other software that can do a better job? [closed]

All the classes I'm taking require the projects to be done in MATLAB when there are times that C++ would be much better to use. One time the professor took three hours to find a transfer function when ...
2
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1answer
123 views

Voltage form at diode bridge

I want to find the output voltage of a circuit like this: and this is my Matlab code to solve it: ...
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0answers
122 views

Coupled LC Resonator in MATLAB

I am designing a dual-mode resonator with the following Circuit Model and Frequency Response! ADS Circuit Model: Frequency Response: I need help with the modelling of my circuit model in ...
2
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1answer
398 views

Simulating PID controller in Matlab

I am trying to explore PID control with a simulation. My problem is that the derivative term does not behave as expected in my simulation: No matter how large its coefficient it seems unable to ...
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0answers
54 views

Imge processing with dsp board

I am trying to run a simulink model file in TMS320C6416dsk board using RTDX(Real time data exchange). The corresponding C code is generated in the code composer studio3.1 and the .out file is ...
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0answers
70 views

Getting a signal from a sensor in Matlab

I have a sensor from thought technology (http://www.thoughttechnology.com/sensors.htm) I want to use measured data from the sensor in Matlab. But when I use a sample code to get my signal ...
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1answer
51 views

Downsample vs custom latency register

Is there a difference between downsample block (eg. in matlab) versus a register with custom ...
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1answer
175 views

For loop does not compile in Matlab mcode using Xilinx block

I have a simple code in xilix type mblock in simulink: function q = test1( n) q = 0; for i = 1:n q = i; end; end If I run this code naively in matlab ...
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0answers
339 views

How do i calculate %THD using matlab

I have a .mat file that contains one period of a periodic signal. How do I use the exponential Fourier series and the definition of the total harmonic distortion to get total harmonic distortion of ...
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0answers
75 views

Simulating time variying multipath channel in matlab

I need to simulate a time variying multipath channel with a specific doppler frequency in matlab. How can I do that?
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0answers
121 views

Double dispersive channel with jakes model in matlab

I need to simulate a double dispersive channel with jakes model in matlab. I don't know how to choose the elements of the channel matrix. Do I have to choose them with a specific mean and variance? ...
0
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1answer
168 views

how can i use “e” in MATLAB [closed]

is any other way to express this function so i can plot it in matlab over the range -1:.1:5? continuous signal: x(t) = 10e^(-3t)*u(t) MATLAB does not recognized "e",
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2answers
314 views

Finding Thevenin equivalent

I'm looking to find the Thevenin equivalent of two parallel voltage sources where each source has some internal resistance as well for simulation in Matlab. I don't know where and how exactly to put a ...
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1answer
414 views

Estimating a sinc period and width of a rectangular pulse

For a rectangular pulse that has as a fourier transform of a sinc function like so: How can I estimate its sinc period in the frequency domain and compute the width of the rectangular pulse in the ...
2
votes
1answer
393 views

How can I model this linear power system in MATLAB?

For my power system, let us suppose it has the following dynamic model: \$\ x ' = f(x,u)\$. This dynamic model consists of four first order differential equations (see below). Then, I linearized ...
0
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1answer
223 views

Coherence factor in Delay-And-Sum-Beamformer: Triangle Inequality

I'm writing a delay-and-sum-beamformer in MATLAB that incorporates a so-called and widely used coherence factor CF. Now I'm confused about the math behind that ...
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1answer
163 views

How to implement a control system

I have designed a Control System and don't know how to implement it. I have modeled the physical system and have designed the control based on the State Space method. The state space form is as ...
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1answer
101 views

Another matlab figure question [closed]

I want to graph \$h[n] = \frac{1}{n+1} \ n\in [0,29] \$ I tried the next code, but won't compile: ...
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1answer
738 views

Incremental optical encoder output to Matlab Simulink

I'm doing a project based on an incremental encoder based position sensor. In order to validate this, I'm trying to read square wave signals from a function generator (since an optical encoder ...