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Why are the results of two spectral density estimation methods（periodogram and pwelch） inconsistent? If the amplitude of the power spectrum density of random signals is concerned, which spectral estimation is accurate?
Your bin widths are different. In Welch's method, you are doing in only 500 points FFT. However, the power is given by multiplyi...

7 years ago | 1

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How to make a stairs + semilogx plot?
I don't know if this is what you want, but here is a quick example to combine stair plot with log scale in x stairs(1:10,1:...

7 years ago | 1

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What exactly is operating frequency in creating a beamformer object?
You are using a subband beamformer. These beamformer assumes that the signal is modulated to a carrier frequency, i.e., the oper...

7 years ago | 0

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Implement filter that cannot be normed to a(1) = 1
You will pad 4 zeros in front of numerator. HTH

7 years ago | 0

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Plotting input data of DOA algorithm blocks in "Beamscan and MVDR Direction of Arrival Estimation on a ULA"
That makes sense, there is indeed two complex signals and 4 lines. However, because the two signal are conjugate to each other, ...

7 years ago | 0

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Plotting input data of DOA algorithm blocks in "Beamscan and MVDR Direction of Arrival Estimation on a ULA"
Are you referring to the output after the Narrowband Rx Array block? If so, they are matrices of complex signal that includes de...

7 years ago | 0

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Phased Array System Toolbox License
This forum is probably not the best place to ask license related questions. I would suggest you to first contact your school's s...

7 years ago | 1

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Rotation of CustomAntennaElement data
Could you clarify what you want to achieve? The elements in Phased Array System Toolbox assumes the element normal at 0 azim...

7 years ago | 1

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matrix of circulating vectors without loop
Not necessarily better in performance, but if you really want to avoid explicitly calling a loop, try y = arrayfun(@(r)gall...

7 years ago | 1

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Periodogram and Spectral estimate
Omega is your frequency. From the equation, it could be the angular frequency so it would be from -pi/T to pi/T where T is your ...

7 years ago | 0

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phased array beam stearing function
It looks like the default feed location is too close for this configuration. If you set it to pm.FeedOffset = [-pm.Length/4...

7 years ago | 0

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Question about radar target classification example in Phased Array System Toolbox
The simulation used a pulse radar but I think the concept is independent to what type of radar one is using. It just looks at th...

7 years ago | 0

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which type of kalman filter do i have to implement for unknown dynamic model's system?
Each Kalman filter is tied to a certain dynamic model. If you don't have knowledge of your dynamic model, one possible approach ...

7 years ago | 0

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matched filtering between two signals
Here is an example to get you started. Once you get the filtered signal, the peak indicates where the echo starts. <https://w...

7 years ago | 0

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How to use a matched filter to find a single in an array of data?
Here is some relevant information <https://www.mathworks.com/matlabcentral/answers/4502-matched-filter> Alternatively, you...

7 years ago | 0

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how to do Polar plot?
There is an entry on File Exchange for radar plot <https://www.mathworks.com/matlabcentral/fileexchange/59561-spider--radar--...

7 years ago | 0

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How to write a OS CFAR algorithmus for RADAR using MATLAB
If you want to understand the theory behind, the reference listed in the help is a good start. Richards, M. A. Fundamentals o...

7 years ago | 0

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Filling in gaps incrementally
Do you always have a fully populated first column as the time vector? If so, you can try the following to do the linear interpol...

7 years ago | 0

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why is Simulink Linear FM output of size [100 1]?
Could you provide more context? If you cannot share the model, it would be helpful if you can at least share a snapshot of the d...

7 years ago | 0

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Speed of target in radar
I think you asked the same question yesterday, did you delete that one? Please do not delete the question and restart a new one....

8 years ago | 0

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What is the difference between filter and conv?
I don't know the detail about your signal. But if the question is between |filter| and |conv|, they are only similar when you ta...

8 years ago | 1

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What is the reason for choosing a rectangular pulse as an incoming signal?
There is no particular reason. Certainly the sine wave will work if the focus is just on the beamforming algorithm itself. In de...

8 years ago | 0

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What are the values used for initialization of matrices in kalman filter algorithm?
What is your 2D motion model? All these parameters depend on your motion model so there is not a common setting for all situatio...

8 years ago | 0

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How can i get the exact peak point on music algorithms?
Not sure I understand exactly what you question, are you saying you have a MUSIC spectrum and want to find the peak location? If...

8 years ago | 0

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Collector for Uniform Linear Array
You may be using an older release where the using the class name to do a function call is not supported yet, could you try the f...

8 years ago | 0

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Why i can't plot a spectrum of a rectangular window function?
There is a mistake in your plotting command. Because the spectrum is in frequency domain, you need to have a frequency axis inst...

8 years ago | 1

8 years ago | 0

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Complementery and barker code
Here is a radar example for using PhaseCodedWaveform. <https://www.mathworks.com/help/phased/ug/basic-radar-using-phase-code...

8 years ago | 0

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collect 400 samples from a LFM (5MHz bandwidth) signal modulated on 18GHz
Your sampling rate is set at fs, which is about 20 MHz, this means your Nyquist is about 10 MHz, regardless what your carrier is...

8 years ago | 0

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Answered
How to generate complex envelop signal using chirp function
One way to get the complex chirp is to form analytical signal, e.g., f1 = 0; f2 = 10; t = 0:0.01:1; xi = chirp(t,f1,...

8 years ago | 0

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