# Chen

### Defence R&D Canada Ottawa

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**Feeds**

scatter3 in log-log-log

hello Can someone tell me the 'log' in set(gca,'Xscale','log','Zscale','log','Yscale','log') is in 'natural log'n or in log1...

4 years ago | 0

Question

How awgn add white noise on complex envolope signal

Hello An I/Q baseband signal goes through Tx, the wave received by Rx at carrier (fc) with condisering receiver noise should be...

4 years ago | 1 answer | 0

### 1

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

Hello HTH Many thanks for you answer! In order to do A(t)exp(1i*2*pi*fc*t). A(t) has to sampled at fs>=2fc. Please let me know...

4 years ago | 0

| accepted

Question

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

Hello Following code is copied from help of phased.Collector, My questions are what is 'receivedsig' signal frequency? How t...

4 years ago | 2 answers | 0

### 2

answersQuestion

how to let elements in each column of a matrix divided by the first element in each column

is there a simple way to let all the elements in a column of a matrix divided by the first element of each column, without using...

6 years ago | 1 answer | 0

### 1

answerQuestion

Add noise to multi-signals

I want to simulate a received signal which has three sins-wave signals at different frequencies with difference amplitudes and p...

6 years ago | 1 answer | 0

### 1

answerQuestion

using Matlab RF toolbox to model multi-channel RF to IF downconvertor

Does someone have example to model, say 4-channel, RF to IF downconvertor with common LO? Thanks Chen

6 years ago | 0 answers | 0

### 0

answersHow to generate complex envelop signal using chirp function

Hello Honglei Many thanks for your answer. What I want to do is that a URA gets 400 samples from the signal of a LFM(5MHz) mod...

6 years ago | 0

Question

collect 400 samples from a LFM (5MHz bandwidth) signal modulated on 18GHz

f_sweep = 5e6; fs = f_sweep * 4.121; sLFM = phasedLinearFMWaveform('SampleRate',fs,'SweepBandWidth',f_sweep,'PulseWidth',1e-3)...

6 years ago | 1 answer | 0

### 1

answerQuestion

How to generate complex envelop signal using chirp function

Matlab chirp function will generate cosine-based chirp signal, say from f1 to f2 with 10MHz linear chirp. How to modulate the si...

6 years ago | 2 answers | 0

### 2

answersQuestion

Generate signal with given RMSE and error distribution

Is there a way to generate a signal with a given root-mean-square-error (RMSE) and certain error distributions?

6 years ago | 0 answers | 0

### 0

answersQuestion

rotate elements in phase.ConformalArray

Hello In the following code, I designed a spiral antenna (sa), and used the sa in a cavity backed spiral antenna (CBSA). T...

6 years ago | 1 answer | 0

### 1

answerQuestion

How to include element response in collectPlaneWave

Hello in the following code, I designed a spiral antenna (sa), and used the sa in a cavity backed spiral antenna (CBSA). ...

6 years ago | 1 answer | 0

### 1

answerusing antenna element designed from Antenna Toolbox in Phased Array Toolbox

Thanks Honglei I know the way you suggested. For simple or easy antenna element this works will, as the element can be quickly ...

6 years ago | 0

Question

Get more antenna property calculations in one frequency sweep

I am running a Frequency Sweep to get a spiral antenna axialRatio. Can you get other antenna results, say current, pattern, impe...

6 years ago | 1 answer | 0

### 1

answerQuestion

Frequency Sweep using Parallel Toolbox

when I do frequency sweep to calculate an antenna property, say axialRatio, current, pattern ..., is there way to use parallel ...

6 years ago | 2 answers | 0

### 2

answersQuestion

using antenna element designed from Antenna Toolbox in Phased Array Toolbox

Once I designed an antenna element using Antenna Toolbox, how to input the designed element in a phased array?

6 years ago | 2 answers | 0

### 2

answersQuestion

Antenna Designee with Parallel Toolbox

When using Antenna Designer to design an antenna, say spiral antenna, is there way to use Parallel Toolbox to speed up calculati...

6 years ago | 1 answer | 0

### 1

answerQuestion

change unit in Antenna Toolbox

Hello How to change unit in the Antenna Designer. I would like to use mil = 1/1000 inch as the unit for may antenna design. ...

6 years ago | 1 answer | 0

### 1

answerQuestion

View helix elements the viewArray

When we view array using viewArray function, can we put real antenna element to replace 'balls' in the view. For example using ...

6 years ago | 1 answer | 0

### 1

answerQuestion

Where to find the phased.URA steering vector equation

after defined URA using phased.URA, using phased.SteeringVector, I can get the URA steering vector. 1. where I can find the mat...

7 years ago | 1 answer | 0

### 1

answerQuestion

How to access 'TextBox' in viewArray figure

After viewArray plot the array structure, I would like to move the position of the 'TestBox' in the figure, but I do not know ho...

7 years ago | 1 answer | 0

### 1

answerQuestion

Move phased.conformalArray phase reference center

Once I use phased.conformalArray to create an array 1. where is the array phase reference center? 2. how to move the array pha...

7 years ago | 1 answer | 0

### 1

answerQuestion

Generate portion of circular array elements

Is there way to generate a equal spacing array which is a part of a circular array? Or Can you use a portion elements in a cir...

7 years ago | 1 answer | 0

### 1

answermove xyz coordinate to (0,0,0) of the array in viewArray

Thanks Honglei Can you show me a example on how to move xyz to the 11th element in attached. Regards! Chen <</matlabcentra...

7 years ago | 0

how to make phased.CosineAntennaElement element pattern in z-direction

Many thanks, I tried and it works.

7 years ago | 0

| accepted

how to make phased.CosineAntennaElement element pattern in z-direction

Hello David In my application, I use phased.ConformalArray. 1. there is no 'ArrayNormal' in it. 2. If my conformalArray is on...

7 years ago | 0