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I have found negative value of SNR(in dBc) of an ECG signal by using spectrum analyzer block in simulink.Is it correct?
That is normal. A negative dBc value simply means that the signal is weaker than the carrier. HTH

más de 9 años hace | 1

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Can I get Antenna Toolbox on trial basis?
<https://www.mathworks.com/products/antenna/> There is a product trial link on the right panel beside MATLAB logo. HTH

más de 9 años hace | 1

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Strange results with xcorr
You may want to get the lags from xcorr too so you can plot the correlation over lags. [C,lags] = xcorr(s1,s2); plot(la...

más de 9 años hace | 0

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Out of Memory error!
I'm a bit confused by your code snippet. For example, your input, signal, is never used in the function, so I'm not sure what yo...

más de 9 años hace | 0

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Help required with simulating Ultrasonic Transducers!
Most Phased Array System Toolbox functions today assumes plane wave. So if you are only doing flash mode, then it is applicable....

más de 9 años hace | 0

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Simulating a known signal at an array of antennas
I would suggest you looking at |phased.Collector| to collect signal and |phased.ReceiverPreamp| to add noise. Say you have a sig...

más de 9 años hace | 1

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Difference between steering and angle parameter!
The input 'Ang' specifies the direction at which the signal is transmitted. The input 'Steer' only applies when you have a su...

más de 9 años hace | 1

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coder.extrinsic error! Radar designing
coder.extrinsic should have no effect in regular MATLAB. It only applicable when you try to generate the code. But I'm not sure ...

más de 9 años hace | 1

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Is the size of antenna array correspond to the number on transmit antenna ???
I don't quite get your question. From your description "an antenna array of size 256x64 at transmitter", I'd say 256x64 is the a...

casi 10 años hace | 0

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Radar sector scanning!
The example uses the electronic scanning, i.e., scanning the beam via changing the phase at each element. Also for simple rotati...

casi 10 años hace | 0

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In order to generate vertical coverage plots or blake charts using radarvcp the frequency limit is 10 Ghz . I need to make plots at 16 Ghz. I can't determine what function is generating the error message about exceeding the 10 Ghz limit. Help?
I think the limit is set by the original model developed by Blake. I believe beyond 10 GHz the model is not validated. The error...

casi 10 años hace | 1

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Specifying SNR level of signal returned from Phased Array System Toolbox's function sensorsig
You can specify the signal power if you specify the SCOV input as a scalar. See the reference page at <http://www.mathworks.c...

casi 10 años hace | 0

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FMCW sweeptime Query!
I don't have your data to test it, but if you are using a 1ms sweeping time, then you need to update your sweep slope too. Inste...

casi 10 años hace | 2

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How to use spectrum analyzer object to show a signal waveform ?
You can set FrequencyResolutionMethod to 'Window length' to manually adjust the length of signal used to compute the spectrum, e...

casi 10 años hace | 0

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FMCW Radar Query!
Looks like you are using Phased Array System Toolbox, in that case, have you checked out its library in Simulink? There is a FMC...

casi 10 años hace | 0

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Question about sensorsig function of phased array system toolbox
If I understand it correctly, the signal at antenna #2 is essentially the negative of the antenna #1. This is because the first ...

casi 10 años hace | 1

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Phased Array Simulink modeling, Barrage
If you always outputing multiple number of pulses, then you may want to consider setting OutputFormat to Pulses and simply speci...

casi 10 años hace | 0

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phased.FreeSpace Error invoking stepImpl
Looks like your signal changed the complexity during your simulation. An easy way to fix this is to always convert your input to...

casi 10 años hace | 0

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How can i find the path of a file?
Try fileparts(which('File.sldd')) But your File.sldd has to be on path.

casi 10 años hace | 5

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Frequency domain of wvtool - how to replicate?
You need more points in there. The default is probably 512 or 1024. Try plot(db(abs(fft(w,1024))));axis([0 50 -80 40]); ...

casi 10 años hace | 0

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I have communication systems toolbox. I am not able to find FM Modulator baseband module in Simulink. Help
What version do you have? According the documentation below, you should be able to find it under Modulation library, then Analog...

casi 10 años hace | 0

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Different plots using rocpfa
I think you probably refer to the case where you take the magnitude of the signal to do the detection and in that case I agree w...

casi 10 años hace | 0

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Direction of arrival estimation of multiple signals using Capon (MVDR) beamformer
I would replace your signal definition with the following x = x + amp(k)*aU(k,:).'*exp(1i*randn(size(t))); HTH

casi 10 años hace | 0

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area of power spectrum units
If your horizontal axes is in Hz, then the unit will be fT^2/Hz*Hz=fT^2.

casi 10 años hace | 0

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How to excite each antenna with a different level of power by using phased array toolbox or antenna toolbox?
You can do this by passing in a weight vector to array. For example, say you have an 8-element array and you want to excite it e...

casi 10 años hace | 0

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A few questions about the output value of dsp.SpectrumAnalyzer
Here is how I look at it: (1) For all those FFT based spectrum analysis tool, the theory behind it is that the base of FFT ma...

casi 10 años hace | 0

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mex file gives two different results. what is the cause?
maybe you have some random number in functions you use? Could you try to run rng(0) before each run of your script and s...

casi 10 años hace | 0

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What toolboxes, if any, come with MatLab prerelease?
You may find the following answer useful <https://www.mathworks.com/matlabcentral/answers/101155-how-do-i-obtain-a-prerelease...

casi 10 años hace | 0

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Notice of amplitude modulation in FMCW example
This is due to the distortion of the propagation. In your setup, the distance between the radar and the target is approximately ...

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How to use the fast fourier transform to calculate the output of a transfer function?
I assume your X, H, and Y are all in frequency domain? In that case, your H has to match the size of X and it should be a elemen...

casi 10 años hace | 2

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