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...

10 månader ago | 1

| accepted

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...

10 månader 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

10 månader 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-...

10 månader 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

10 månader ago | 0

| accepted

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...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år ago | 0

| accepted

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...

ungefär ett år ago | 1

| accepted

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...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år 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:/...

ungefär ett år 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...

ungefär ett år 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...

ungefär ett år ago | 0

| accepted

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...

ungefär ett år ago | 0

Answered

phased array mag2db

Thanks for the suggestion, we will look into this.

phased array mag2db

Thanks for the suggestion, we will look into this.

ungefär ett år 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...

ungefär ett år 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...

mer än ett år 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...

mer än ett år ago | 1

| accepted

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 ...

mer än ett år 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...

mer än ett år ago | 0

| accepted

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...

mer än ett år ago | 0

| accepted

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...

mer än ett år 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...

mer än ett år ago | 1

Answered

Phased Array Systems Toolbox

X is probably not a matrix. If you can provide more info regarding the data matrix, that will help us understand the problem bet...

Phased Array Systems Toolbox

X is probably not a matrix. If you can provide more info regarding the data matrix, that will help us understand the problem bet...

mer än ett år ago | 0

Answered

Max value of each vector in a 3D hyperspectral data matrix

Let's say xc is your datacube, does [z_max,z_ind] = max(xc,[],3) satisfy your needs? HTH

Max value of each vector in a 3D hyperspectral data matrix

Let's say xc is your datacube, does [z_max,z_ind] = max(xc,[],3) satisfy your needs? HTH

mer än ett år ago | 0

| accepted

Answered

Using System Objects in complex programs (DSP)

Yes you can do it, there are many shipping System objects that do this. This is essentially done the same as a regular class. H...

Using System Objects in complex programs (DSP)

Yes you can do it, there are many shipping System objects that do this. This is essentially done the same as a regular class. H...

mer än ett år ago | 0