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Honglei Chen


Last seen: 3 dagen ago

MathWorks

1.364 total contributions since 2011

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

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Answered
Simulating Freespace power in Matlab
You can start with these reference pages https://www.mathworks.com/help/phased/signal-propagation.html? Go to Functions -> Sig...

3 dagen ago | 0

Answered
MUSIC algorithm ghost target in Matlab Radar Simulation Demo
The range angle image you mentioned in question is not a mirrored target, rather it's just an aliasing to the opposite side due ...

4 dagen ago | 0

Answered
About real time data processing in FMCW RADAR.
You may want to take a look at this example to get some idea on how to process real time data. https://www.mathworks.com/help/p...

4 dagen ago | 0

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Matlab range and angle
I didn't quite understand what you mean by position = d.*t but rangeangle() support vectorization so you should be able to pa...

4 dagen ago | 0

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MUSIC algorithm for direction of arrival
Generally speaking MUSIC belongs to subspace method. It doesn't really compare amplitude or phase, instead it takes advantage of...

4 dagen ago | 0

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Radar Doppler Signals for Car dataset!!
What is your requirement? Do you have any specific motion you want to cover? For a generic model, you can consider using many po...

4 dagen ago | 0

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Collector for array formed of replicated subararrays
They do consider the gain at different angles. As to the input, you may want to check with your setting in array. Did you turn ...

4 dagen ago | 0

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Answered
matlab which filtfilt function handles filter objects
The filtfilt that handles a filter object will be a method on the filter object. For example, you can find filtfilt() method in ...

26 dagen ago | 1

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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...

ongeveer een maand 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...

ongeveer een maand 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...

ongeveer 2 maanden 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...

ongeveer 2 maanden 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...

ongeveer 2 maanden 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

ongeveer 2 maanden 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-...

ongeveer 2 maanden 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

ongeveer 2 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

5 maanden 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...

6 maanden ago | 0

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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:/...

6 maanden ago | 0

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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...

6 maanden ago | 0

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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...

6 maanden 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...

7 maanden ago | 0

Answered
phased array mag2db
Thanks for the suggestion, we will look into this.

7 maanden ago | 0

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