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Chaitanya Mallela


Last seen: en dag ago

MathWorks

39 total contributions since 2020

I am Application Support Engineer at Mathworks. My responsibility is to provide the best support for an application like ML, Signal Processing and Communication, Image Processing.
Disclaimer: Any articles/ideas/opinions here are my own and in no way reflect that of Mathworks.

Chaitanya Mallela's Badges

  • 3 Month Streak
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  • Knowledgeable Level 2
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Answered
how to add velocity to the generated modulated signal?
Velocity effect can be induced in the model when the input signal vary as function of both time and displacement. The function p...

ungefär en månad ago | 0

Answered
How to gaussian white noise with mean, variance and autocorrelation function?
The White Gaussian Noise should contain a multivariate random numbers with three different realizations, each realization with m...

ungefär en månad ago | 0

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Answered
Getting error message for fast Fourier transform from simulink
It seems like data80 does not belong to the valid input types of fft function.You can use either double, int32, uint32 or logica...

ungefär en månad ago | 0

Answered
Create vector with values from the same source
Yes, it would be possible if you are transmitting the truth table data serially using buffer block and conditionally logging the...

ungefär en månad ago | 0

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Nyquist plot - Changing the graph axes
From the basic graph, you can observe that the axis points are different for real and imaginary. Try setting the equal axis and ...

ungefär en månad ago | 0

Answered
1-D vector (either nx1 or 1xn) giving matrix output of nxn in Simulink
yout logs the data from the constant block at every simulation time step. If one dimensional vector is given in the block, the r...

ungefär en månad ago | 0

Answered
Formatting .dat gps file
To read this dat file as a table, the variables have to be aligned as column vectors. Try modifying the dat file as four column ...

ungefär en månad ago | 0

Answered
Output from simulink to matlab file append each run
To file block overwrites the variable every time when simulated. To append the data row wise after every simulation either you c...

ungefär en månad ago | 0

Answered
frequency of wind speed in a particular direction
You can use table function to create a table from the workspace variables T = table(windSpeed,Direction); Also refer the docum...

ungefär en månad ago | 0

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Answered
generate string signal in simulink
Signal generator block does not accept external inputs apart from time. Try to convert character ASCII values to binary using en...

ungefär en månad ago | 0

Answered
How to programmatically change tunable masked parameters while a simulation is running?
I have brought the issue of 'Programmatically changing the tunable masked parameters while running the model' to the notice of o...

ungefär en månad ago | 0

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Answered
How to use the convolution function rather than filter for signal
filter function gives the filter response for both IIR and FIR systems whereas conv function performs linear convolution of the ...

ungefär en månad ago | 0

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Answered
Hi currently im doing a mod and demod of FSK signals and i have to add AWGN into it but cant figure it out can someone help and identify the error, currently im using the code below:
awgn function considers input vector signal, Signal to Noise Ratio (SNR) and Signal power as a general valid attributes. Refer ...

ungefär en månad ago | 0

Answered
Variable of Integration in Simulink
If the variable x is a function of time x(t), you can use Integration by substitution method ...

ungefär 2 månader ago | 0

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Answered
I'm trying to implement DWT-OFDM in Matlab. But Matlab shows the message, only real value can be available for IDWT.
idwt function accepts Approximate coefficients and Detail coefficients corresponding to the wavelet as a real valued vectors. Tr...

ungefär 2 månader ago | 0

Answered
OFDM implementation in Simulink
Create a cyclic prefix extension to the serial IFFT symbols with the help of Selector and Vector Concatenate blocks (extract fro...

ungefär 2 månader ago | 0

Answered
Why the spectrum I get from 'Visualization'-'Frequency response' in 'comm.RayleighChannel' is sometimes different from the spectrum I culculate from 'PathGainsOutputPort'?
Seed property corresponds to the generation of random stream.Seed serves as a unique identifier of a pseudo-random sequence i.e....

ungefär 2 månader ago | 0

Answered
Filtering using FFT for audio signal
Refer the link https://www.mathworks.com/matlabcentral/answers/503999-filtering-for-multiple-band-of-frequncies which describe...

3 månader ago | 0

Answered
Markers enabled to highlight data
Refer Constant Sample Time section in the documentation https://www.mathworks.com/help/simulink/ug/types-of-sample-time.html

3 månader ago | 0

Answered
How to show link to block in custom error Diagnostic Viewer
The command to display the link to the current block in the Diagnostic Viewer is as shown sldiagviewer.reportError(sprintf('<a ...

3 månader ago | 2

Answered
Sub carrier mapping and IFFT signal formation
Refer the documentation https://www.mathworks.com/help/comm/ref/comm.ofdmmodulator-system-object.html https://www.mathworks.co...

3 månader ago | 0

Answered
Replacing array elements with cell elements
Once a huffman dictionary created for an alphanumeric data from the message with the probability of occurences obtained from the...

3 månader ago | 0

Answered
Cross power spectrum MATLAB
Error occured due to the incorrect matrix dimensions of f1 and vec_Vph in the scatter plot. Try checking the code by modifying t...

3 månader ago | 0

Answered
How to Plot and label the multipath impulse response of the channel.
Refer the documentation https://www.mathworks.com/help/comm/examples/multipath-fading-channel.html

3 månader ago | 0

Answered
Find index of specific rows of a table with value greater than a threshold
Try the code by adding (initial index - 1) to the find function ind = find(T{initial_index:final_index,column_index} > threshol...

3 månader ago | 0

Answered
getting frequency data to time data
ifft function transforms the complex signal data from frequency domain to time domain where the time difference between the succ...

3 månader ago | 0

Answered
where can i find for perfect coding of OTSU thresholding
Refer the documentation https://www.mathworks.com/help/images/ref/graythresh.html https://www.mathworks.com/help/images/ref/m...

3 månader ago | 0

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Answered
Changing frequency of given data set
Consider voltage vector x Let the frequency shift be delta_f and phase shift be delta_p N = 10000 % number of samples To cha...

4 månader ago | 0

Answered
Changing data in excel from NA to a previous number in the column?
T = readtable('filename.csv'); % read the file as table T = fillmissing(T,'previous'); % fill NaNs with previous valu...

4 månader ago | 0

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Answered
how can I direct entities on simevent basing myself on probability?
Set a probabity vector and assign the port numbers to the entities based on their probabilities. Connect the Entity Output Swi...

4 månader ago | 1

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