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Honglei Chen


MathWorks

1.323 total contributions since 2011

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Answered
Difference between no steering and steervec in 0, 0 ?
Could you share how you invoke the two interfaces? From what you described? The two interfaces is a bit different in array defin...

14 días ago | 0

Answered
Hi. I have to create an FMCW signal, transmit, receive and mix them to get the IF signal, and inturn get the radar 2D matrix for post processing. But I my 2nd FFT doesnt give the correct value of velocity.
The following example might be helpful to you https://www.mathworks.com/help/phased/examples/automotive-adaptive-cruise-contro...

19 días ago | 0

Answered
Is there any code for spatial spectrum in ESPRIT algorithm?
ESPRIT does not estimate the direction of arrival from spatial spectrum, thus the function currently does not generate the spati...

19 días ago | 0

Answered
Is there an alternative for kalman filter
For a linear system, a linear Kalman filter is probably enough. There is also a simpler form of Kalman filter called alpha-beta ...

23 días ago | 0

Answered
Are there any matlab functions to calculate E,H-plane beamwidths for a rectangular phased array?
You can use polarpattern to plot the pattern in the two planes and measure the beamwidth. HTH

25 días ago | 0

Answered
Beamsteering With Custom Elements Without Phased Array Toolbox
What you described to me looks like what you will be able to achieve with SteeringVector, or more precisely ArrayResponse. You m...

alrededor de 1 mes ago | 0

Answered
Getting the complex antenna response in the antenna library?
Is this what you mean? https://www.mathworks.com/help/antenna/ref/ehfields.html Or alternatively, if you want it to be in far ...

alrededor de 1 mes ago | 0

Answered
How to update patternCustom plots
Since magE is CData, you can just do h = patternCustom(magE,theta,phi); h.CData = newMagE; HTH

alrededor de 1 mes ago | 0

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Answered
Periodogram of sinusoid: why power is -6 dB instead of -3 dB?
The periodogram shows the power density. The magnitude at those frequency for a sinusoid is 1/2, so the power is 1/4, which corr...

alrededor de 1 mes ago | 0

Answered
How can I know the period of a FMCW?
You may be able to use phased.LinearFMWaveform to achieve this. FMCW waveform is set to be without the idle time. HTH

alrededor de 1 mes ago | 0

Answered
How can I load Phased Array System Toolbox to my trial Matlab?
There is a trial software link on the product home page. https://www.mathworks.com/products/phased-array.html HTH

alrededor de 1 mes ago | 0

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Answered
Angle of Arrival for UCA
You may want to take a look at root MUSIC algorithm provided in Phased Array System Toolbox https://www.mathworks.com/help/phas...

alrededor de 2 meses ago | 0

Answered
Adaptive beamforming using LMS
Hi Mirza, Thanks for requesting these features, we'll look into it.

alrededor de 2 meses ago | 0

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Answered
scale factor for constantGammaClutter model in phase array toolbox
The magnitude is determined by many factos, like the power and the value of gamma parameter. In addition, if your altitude is hi...

alrededor de 2 meses ago | 0

Answered
Relationship between noise power in a Band-Limited White Noise block VS Variance in a Random Number block
You may want to look at the Algorithm section of the following doc page https://www.mathworks.com/help/simulink/slref/bandlimit...

alrededor de 2 meses ago | 1

| accepted

Answered
Beamforming with FFT not showing Grating Lobes
This is because when you use FFT, by definition FFT covers only between 0 to 2pi. But when you have an element spacing of severa...

alrededor de 2 meses ago | 0

Answered
Problem in the initFcn callback of model
When you say that you rewrote the init function, did you overwrite it? If so, it should use the same one. You can certainly rena...

alrededor de 2 meses ago | 0

Answered
IMU sensor fusion viewer "HelperOrientationViewer"
You may have to open the example in MATLAB and click the "Open Example" button. That will copy all necessary helper functions in...

2 meses ago | 1

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Answered
Variable measurement length for trackingEKF
Could you elaborate what kind of system you are trying to model? In general the dimension of the measurement doens't change over...

2 meses ago | 0

Answered
delay and sum beamforming
Have you tried phased.PhaseShiftBeamformer? That would perform delay and sum beamforming for you. HTH

3 meses ago | 0

Answered
Radar simulation: How to apply a precise delay?
The FreeSpace in Phased Array System Toolbox uses fractional delay fitler to approximate the delay between samples. HTH

3 meses ago | 1

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Answered
phased.URA 8 by 1 array
This is a linear array, you can consider using phased.ULA to model it. phased.URA requires multiple elements in both dimensions....

3 meses ago | 0

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Answered
PHASED ARRAY TOOLBOX/ SINUSOIDAL VIBRATING TARGET MODELLING
Nothing off the shelf at this point. This being said, the interface of features in Phased Array System Toolbox are numeric vecto...

3 meses ago | 0

Answered
How can i use global2localcoord function with axes?
From what you describe, your x axis is [1 1 0] and your y axis is [-1 1 0]. When yo specify the axes matrix, each colum represen...

3 meses ago | 0

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Answered
How can I use the constantGammaClutter function to generate the clutter with no ULA
You can set the Sensor property to something like phased.IsotropicAntennaElement and it will generate clutter accordingly. HTH

3 meses ago | 0

Answered
How to add zero infront of number
I don't think you can pad zero for a numeric number but you can do it when printing. For example fprintf('num = %02d\n',2) Is ...

4 meses ago | 0

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Answered
How can I use a matrix to be a loop variable
If you have somethign like mat = {mat1,mat2,mat3,mat4} You can do for m = 1:numel(mat) imshow(mat{m}) end HTH

4 meses ago | 0

| accepted

Answered
sine wave shifted 90 degree
If it's really just a sine wave, you can consider hook it up with a integrator. HTH

4 meses ago | 0

Answered
How to determine the rotation matrix for rotating one vector to align with another ?
There is no special meaning of rotvv other than it's one of the implementation to rotate one vector to be parallel to another on...

4 meses ago | 0

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