Community Profile

photo

Kaashyap Pappu


MathWorks

102 total contributions since 2019

I am an Application Support Engineer at MathWorks in the Engineering Development Group.

My areas of interest are Signal Processing, Wireless and Satellite Communications, Radar Signal Processing and Image Processing.

DISCLAIMER: Any advice or opinions here are my own, and in no way reflect that of MathWorks.

Kaashyap Pappu's Badges

  • Knowledgeable Level 2
  • First Answer
  • Introduction to MATLAB Master
  • Solver

View details...

Contributions in
View by

Answered
Loss stops calculating with custom layer (weighted cross entropy function)
Whenever the loss value is either “NaN” or “Inf”, the value is not plotted on the curve. On similar lines, the accuracy is near ...

19 days ago | 0

| accepted

Answered
Classifying ECG into separate segments
As I understand it, each type of wave has a specific frequency characteristic. Based on this, bandpass filters can be designed t...

20 days ago | 0

Answered
Time-frequency spectral coherence analysis (desperate need of help)
As has already been suggested by Daniel, the mscohere function can be used. If you are using a custom window, generate the vecto...

20 days ago | 0

Answered
How do I plot a constant value over multiple different intervals ?
To plot an overlapping line onto the figure, an x-axis vector would need to be specified and provided to the “plot” function alo...

20 days ago | 0

Answered
Help with echo effect to audio signal code?
The Audio Toolbox has an Echo object that could cater to your needs. Create the object using the following code: echoObject = a...

21 days ago | 0

Answered
designAuditoryFilterBank - Error "Undefined function or variable"
The designAuditoryFilterBank function is available from the MATLAB R2019B release version. If you are using an older version, th...

21 days ago | 0

| accepted

Answered
Frequency spectrum of a sound signal
Using a test sound file of my own, I was able to generate the plots attached. The function “audioread” works if the suffix of th...

21 days ago | 0

Answered
BER depends on TotalFrame count in QPSK Transmitter and Receiver example
The variability is due to timing synchronization and carrier frequency offset (CFO). Timing synchronization becomes much difficu...

21 days ago | 1

Answered
Collection of all the signals by Phased.collector
Yes, the “collector” can be used for all the signals from angles by specifying the second input argument as shown as shown here....

22 days ago | 0

| accepted

Answered
Remove unwanted narrowband interference
Increasing the order of the Butterworth filter could help improve the response. Alternatively, the buttord function can be used ...

22 days ago | 0

Answered
Plotting a matrix / Plotear una matriz
I am assuming you are trying to have multiple axes on a single figure window, where a few of the subplots will be used to plot m...

23 days ago | 1

| accepted

Answered
append cell array #2 to cell array #1 to get a final cell array of cells
The operations carried out by either: C = [A B]; C = horzcat(A,B); C = cat(2,A,B); Should work for your requirement. There i...

23 days ago | 0

| accepted

Answered
Normalize/scale in range
The code below can help perform matrix normalization where you have to specify the appropriate -1, 0 and 1 values in variables "...

23 days ago | 0

| accepted

Answered
How to set the FIR filter specifications?
You can use the Filter Designer app to get started on the Filter design. You can select the FIR filter option, specify order or ...

23 days ago | 0

| accepted

Answered
Matlab and USB2.0 Protocol data aquisition
To read data from a USB, you can use the serial port object to initialize communication between device and MATLAB, followed by u...

3 months ago | 0

Answered
Help needed for Plotting Confusion Matrix as given in the sample image
I have brought this issue to the notice of our developers. They will investigate the matter further. For the time being, you co...

3 months ago | 0

| accepted

Answered
単相誘導機の特性曲線フィッティング
You can use the Curve Fitting app documentation to get started. Hope it helps!

3 months ago | 0

| accepted

Answered
how can i filter my signal if the fft looks like this?
For plotting the FFT output, the x-axis must be defined in a vector. Ideally this vector is defined as follows: x = (0: 1/nFFT ...

3 months ago | 0

| accepted

Answered
QPSK modulator and demodulator
To perform QPSK modulation and demodulation, you can use the “pskmod” and “pskdemod” functions by setting the order of modulatio...

3 months ago | 0

Answered
How to hold previous selection in masked block
The solution to this problem has been addressed in this thread. Hope this helps!

3 months ago | 0

Answered
Plot BER & SNR of LTE
To obtain the BER values for a LTE channel, refer to the example elaborated upon here. Click on “Try it in MATLAB” to get the M-...

3 months ago | 0

| accepted

Answered
Examples of matlab2016
You can find the documentation of previous MATLAB releases in the Archived MathWorks Documentation here. Hope this helps!

3 months ago | 0

| accepted

Answered
Syntax error in Simulink Fcn
Make sure the variables “c1”, “c2”, “u”, “c3”, “cw”, “A” and “rho” are defined in the MATLAB workspace or in one of the callback...

3 months ago | 0

Answered
Analysing the results of a fullfactorial experiment
A possible workflow for this could be to normalize each of the factor values using the “normalize” function elaborated here. Se...

3 months ago | 0

Answered
Fine Tuning Kalman Filter Using Simulink Design Optimization
A similar query regarding the Q and R matrices’ optimization was addressed and elaborated upon here. It is important to model th...

3 months ago | 0

Answered
Using bisection to determine unknown parameter
The results of function_Q2(a) and function_Q2(b) are negative, therefore no root exists within the interval [a,b]. The “if” cond...

3 months ago | 0

Answered
Filtering of frame by frame IQ data from SDR
To filter the frame-based samples, you can use the “filter” function with a “filter” object as shown here. By appropriately assi...

3 months ago | 0

| accepted

Answered
how to impliment pseudo random binary singal in simulink ?
A general way to generate a random binary signal would be to use the “Random Number” block that has been elaborated here, follow...

3 months ago | 0

Answered
FFT analysis through powergui block is showing empty in signal options.
Hi, Given that I have been unable to reproduce this issue, a possible workaround I have identified would be to connect the outp...

4 months ago | 0

Load more