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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

9 years ago | 1

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Answered
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

9 years ago | 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...

9 years ago | 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...

9 years ago | 0

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Answered
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....

9 years ago | 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...

9 years ago | 1

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Answered
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...

9 years ago | 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 ...

9 years ago | 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...

10 years ago | 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...

10 years ago | 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...

10 years ago | 1

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Answered
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...

10 years ago | 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...

10 years ago | 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...

10 years ago | 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...

10 years ago | 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 ...

10 years ago | 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...

10 years ago | 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...

10 years ago | 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.

10 years ago | 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]); ...

10 years ago | 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...

10 years ago | 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...

10 years ago | 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

10 years ago | 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.

10 years ago | 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...

10 years ago | 0

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Answered
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...

10 years ago | 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...

10 years ago | 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...

10 years ago | 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 ...

10 years ago | 0

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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...

10 years ago | 2

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