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# Honglei Chen

### MathWorks

1,318 2011 年以降の合計貢献数

#### Honglei Chen's バッジ

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...

3日 前 | 0

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 ...

3日 前 | 0

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

10日 前 | 0

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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...

10日 前 | 0

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

10日 前 | 0

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

10日 前 | 0

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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...

23日 前 | 0

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

23日 前 | 0

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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...

24日 前 | 0

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...

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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...

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...

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...

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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...

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

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

2ヶ月 前 | 1

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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....

2ヶ月 前 | 0

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what does this error error mean? "Array formation and parentheses-style indexing with objects of class 'phased.PhaseShiftBeamformer' is not allowed. Use objects of class 'phased.PhaseShiftBeamformer' only as scalars or use a cell array."
Let's say you have two objects bf1 = phased.PhaseShiftBeamformer; bf2 = phased.PhaseShiftBeamformer; The message indicates th...

2ヶ月 前 | 0

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...

2ヶ月 前 | 0

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ヶ月 前 | 0

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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ヶ月 前 | 0

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 ...

3ヶ月 前 | 0

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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

3ヶ月 前 | 0

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

3ヶ月 前 | 0

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...

3ヶ月 前 | 0

Replace two-way propagation channel with two one-way propagation channels
This may have to do with your target location. The channel delays signal based on the distance. However, when the travel time is...

3ヶ月 前 | 0

XCORR function to find the lag time between two signals
We probably need a bit more info to understand why the lag is always the same. But by default xcorr returns the delay in lags, t...

3ヶ月 前 | 0

Error with the "Design an Internally Matched Ultra-wideband Vivaldi Antenna" example
You will need to open the example in MATLAB. In there you should have a button labled as "Open Example" or something close. When...

3ヶ月 前 | 1

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the element in radarObjects mean in Forward Collision Warning Using Sensor Fusion
The radarObject output is a detection, therefore it contains the information from the detected signal. If you have data from the...

4ヶ月 前 | 0

Frost beamformer internal calculations
Yes, the code is available to see if you do edit phased.FrostBeamformer The constraint is simply to return a distortion less ...

4ヶ月 前 | 2

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