I am a developer on Phased Array System Toolbox at MathWorks

DISCLAIMER: Any advice or opinions posted here are my own, and in no way reflect that of MathWorks.

Professional Interests: Signal Processing, Array Processing, Radar, and Communication

Answered

Building Radar Data Cube

For FMCW, after phased.ReceiverPreamp, that's the raw signal. You will need to mix it with the transmitted signal and then do an...

Building Radar Data Cube

For FMCW, after phased.ReceiverPreamp, that's the raw signal. You will need to mix it with the transmitted signal and then do an...

6 days ago | 0

Answered

How to get received signal at the carrier when use Phased Array ToolBox

Phased Array System Toolbox models the signal as a complex baseband representation. Normally a signal occupies certain bandwidth...

How to get received signal at the carrier when use Phased Array ToolBox

Phased Array System Toolbox models the signal as a complex baseband representation. Normally a signal occupies certain bandwidth...

13 days ago | 0

Answered

Phased.RadarBackScatteringTarget be used in bistatic configuration

Bistatic and monostatic RCS is a bit different in the sense that bistatic RCS not only depends on the incident angle, but also d...

Phased.RadarBackScatteringTarget be used in bistatic configuration

Bistatic and monostatic RCS is a bit different in the sense that bistatic RCS not only depends on the incident angle, but also d...

20 days ago | 0

Answered

LinearFM Target Range Detection with Matched Filter Error

You forgot to set the sample rate in channel accordingly. Replace your channel definition as channel = phased.FreeSpace('Propag...

LinearFM Target Range Detection with Matched Filter Error

You forgot to set the sample rate in channel accordingly. Replace your channel definition as channel = phased.FreeSpace('Propag...

27 days ago | 1

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Answered

Beamforming using custom phases for each array element.

Like you said, you can use custom tapering on elements. Just convert the phase to the corresponding complex number and specify i...

Beamforming using custom phases for each array element.

Like you said, you can use custom tapering on elements. Just convert the phase to the corresponding complex number and specify i...

27 days ago | 0

Answered

phased.freespace channel multiple targets

What are dimensions of your inputs to the object? You may need to match the number of input signal to number or targets. HTH

phased.freespace channel multiple targets

What are dimensions of your inputs to the object? You may need to match the number of input signal to number or targets. HTH

27 days ago | 0

Answered

how to simulate radar echo signal with time delay and doppler shift?

These examples in Phased Array System Toolbox mahy be a good start. https://www.mathworks.com/help/phased/examples/designing-a-...

how to simulate radar echo signal with time delay and doppler shift?

These examples in Phased Array System Toolbox mahy be a good start. https://www.mathworks.com/help/phased/examples/designing-a-...

27 days ago | 0

Answered

generating matched filter for a rectangular pulse waveform

In general matched filter is the conjugated time reversal of the waveform, like y = conv(x,conj(flip(x))) HTH

generating matched filter for a rectangular pulse waveform

In general matched filter is the conjugated time reversal of the waveform, like y = conv(x,conj(flip(x))) HTH

27 days ago | 0

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Answered

How to save the previous figure generated by function'step(H,x)'

The constellation diagram is workig as expected. The object enables you to overwrite the plot over time so you can see how the c...

How to save the previous figure generated by function'step(H,x)'

The constellation diagram is workig as expected. The object enables you to overwrite the plot over time so you can see how the c...

4 months ago | 0

Answered

How can I get the phase of a ConformalArray

Could you elaborate what you mean by having steering vector as an input? In your pattern() call, the steering vector (I assume t...

How can I get the phase of a ConformalArray

Could you elaborate what you mean by having steering vector as an input? In your pattern() call, the steering vector (I assume t...

4 months ago | 0

Answered

Shnidman’s equations

In this case you can use shnidman to compute the SNR as a functionof N and then plot it manually, e.g. N = 1:50; Pd = 0.98; P...

Shnidman’s equations

In this case you can use shnidman to compute the SNR as a functionof N and then plot it manually, e.g. N = 1:50; Pd = 0.98; P...

4 months ago | 0

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Answered

Can I use my own model in "trackingimm"

Yes you can. You need to provide your own motion model update/measurement functions as well as a function switching the state be...

Can I use my own model in "trackingimm"

Yes you can. You need to provide your own motion model update/measurement functions as well as a function switching the state be...

4 months ago | 1

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Answered

2D beamforming simulation

First of all, I don't think elevation is changing. This plot is in spherical coordinates, so the surface is curved, but the colo...

2D beamforming simulation

First of all, I don't think elevation is changing. This plot is in spherical coordinates, so the surface is curved, but the colo...

4 months ago | 0

Answered

Delay-Sum Beam-forming

The following page contains some relevant information and can be a good starting point. https://www.mathworks.com/help/phased/b...

Delay-Sum Beam-forming

The following page contains some relevant information and can be a good starting point. https://www.mathworks.com/help/phased/b...

4 months ago | 0

Answered

How to model a rotating target ?

The following example may give you some ideas. https://www.mathworks.com/help/phased/examples/introduction-to-micro-doppler-ef...

How to model a rotating target ?

The following example may give you some ideas. https://www.mathworks.com/help/phased/examples/introduction-to-micro-doppler-ef...

4 months ago | 0

Answered

Antenna Toolbox Directivity Appears To Saturate

Your array has more than 100 thousand elements so it's very large. Therefore, the calculation probably missed the narrow beam. A...

Antenna Toolbox Directivity Appears To Saturate

Your array has more than 100 thousand elements so it's very large. Therefore, the calculation probably missed the narrow beam. A...

4 months ago | 0

Answered

How can I find the incident angle of a 4x4 array that is divided from 1 Tx and 1 Rx channel using Phased Array Toolbox?

If all you care is just this 4x4 array, then you may just want to use a regular URA. It's not clear why you opt in a Partitioned...

How can I find the incident angle of a 4x4 array that is divided from 1 Tx and 1 Rx channel using Phased Array Toolbox?

If all you care is just this 4x4 array, then you may just want to use a regular URA. It's not clear why you opt in a Partitioned...

5 months ago | 0

Answered

phased array toolbox.

Yes this can be done. You can look at some examples in following pages to see how to transmit and receive with steering https:/...

phased array toolbox.

Yes this can be done. You can look at some examples in following pages to see how to transmit and receive with steering https:/...

5 months ago | 0

Answered

How to add regular sine wave in phased array toolbox?

Could you clarify your use case? Although there is no regular sine in Phased Array System Toolbox, but you can use sin() functio...

How to add regular sine wave in phased array toolbox?

Could you clarify your use case? Although there is no regular sine in Phased Array System Toolbox, but you can use sin() functio...

5 months ago | 0

Answered

How can I use replicated subarrays and still set individual taper and phases?

If you set SubarraySteering to Custom, it means you want to control each element individually, thus you need to provide a weight...

How can I use replicated subarrays and still set individual taper and phases?

If you set SubarraySteering to Custom, it means you want to control each element individually, thus you need to provide a weight...

5 months ago | 0

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Answered

How to introduce phase error into phased array

You can do somethign like this to simulate a phase error uniformly distributed within +/- 2.5 degrees in each element. pherr_de...

How to introduce phase error into phased array

You can do somethign like this to simulate a phase error uniformly distributed within +/- 2.5 degrees in each element. pherr_de...

6 months ago | 0

Answered

How can i fix this problem "Undefined function 'Taylor' for input arguments of type 'double'."

Looks like you are using a function from the book so you may want to find the function from the disc or download. You should als...

How can i fix this problem "Undefined function 'Taylor' for input arguments of type 'double'."

Looks like you are using a function from the book so you may want to find the function from the disc or download. You should als...

6 months ago | 0

Answered

Can I design speaker array and measure the distribution of sound field in the Phased Array System Toolbox?

You can build a round array in Phased Array System Toolbox, but I'm not familiar with acoustic vortices. Do you have a reference...

Can I design speaker array and measure the distribution of sound field in the Phased Array System Toolbox?

You can build a round array in Phased Array System Toolbox, but I'm not familiar with acoustic vortices. Do you have a reference...

6 months ago | 0

Answered

Get Directivity Values From phased.URA

If you want directivity values for all angles, you can just simply do D = pattern(sar_array, F(1), 'PropagationSpeed', PS, 'Typ...

Get Directivity Values From phased.URA

If you want directivity values for all angles, you can just simply do D = pattern(sar_array, F(1), 'PropagationSpeed', PS, 'Typ...

7 months ago | 1

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Answered

Spectrum cannot be calculated

From the figure, it seems to suggest that your data is complex but your block is set to compute one sided spectrum. I think you ...

Spectrum cannot be calculated

From the figure, it seems to suggest that your data is complex but your block is set to compute one sided spectrum. I think you ...

7 months ago | 0

Answered

Trouble understanding "Lags" for Cross Correlation

1 lag is essentially 1 sample, so how much time it represents depends on your sample rate. In your case, since for 10 sec data y...

Trouble understanding "Lags" for Cross Correlation

1 lag is essentially 1 sample, so how much time it represents depends on your sample rate. In your case, since for 10 sec data y...

7 months ago | 0

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Answered

Multistatic radar simulation in Phased Array Toolbox

Yes Phased Array System Toolbox can model such scene. You can see a bistatic polarimetric radar example at https://www.mathwork...

Multistatic radar simulation in Phased Array Toolbox

Yes Phased Array System Toolbox can model such scene. You can see a bistatic polarimetric radar example at https://www.mathwork...

7 months ago | 0

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Answered

Simulation of Clutter Affected by Transmitting Weight

Thanks for the post, this is indeed a gap in the toolbox. We'll try to provide this capability in the future. What release are y...

Simulation of Clutter Affected by Transmitting Weight

Thanks for the post, this is indeed a gap in the toolbox. We'll try to provide this capability in the future. What release are y...

7 months ago | 0

Answered

Inverse Direction of Arrival Estimation

If you are sure that Range-Azimuth is obtained via a 1-D FFT, then you can just do an inverse FFT, as long as you have the origi...

Inverse Direction of Arrival Estimation

If you are sure that Range-Azimuth is obtained via a 1-D FFT, then you can just do an inverse FFT, as long as you have the origi...

7 months ago | 1