Abdelwahab Afifi

Last seen: Today

27 total contributions since 2019

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Question

How to run Python script in MATLAB?
I'm trying to run python script using MATLAB The python script code.py is used for Saving Model Weights and Architecture Togeth...

6 jours ago | 1 answer | 0

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answer

Question

How to generate wide band OFDM signal using signal aggregation method?
I'm able to genrate OFDM signal with BW=20 MHz as shown in the following figure I wanna build wide band OFDM signal by signal...

2 mois ago | 1 answer | 0

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answer

Question

How to control the stopband attenuation of the resample function ?
I'm using resample function to upsample my data. I need to increase the stop band attenuation to improve the Adjacent channel po...

3 mois ago | 1 answer | 0

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answer

Question

How can I edit Live editor sheet when I access MATLAB remotely?
I use Chrome Remote Desktop to access my PC, However, when I double click any live editor sheet it appears as a white sheet and ...

5 mois ago | 1 answer | 0

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answer

Question

How to build Time delay Neural network using deep learning layers?
I have built this architecture using shallow Time-Delay Neural Networks. where X and Y are the inputs which are time series ve...

6 mois ago | 1 answer | 0

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Question

How to achieve the stable training for time delay neural network ?
I have build Time delay neural network The training performance is changed every time I train it. I tried to set the initial we...

6 mois ago | 1 answer | 0

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Question

create a variable whose name is changed over iteration number in for loop ?
I have my own function that able to build and train Time delay Neural network [Trained_Model]=Train_RVTDNN(NN, Input, target); ...

6 mois ago | 1 answer | 0

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Question

Deleting some layers from trained neural network model
I have trained a big neural network NN which has the structure [20 2 20] as shown in the first figure. After training, I wanna ...

7 mois ago | 1 answer | 0

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Question

How can I freeze specific weights of Neural network model?
I need to set some specific weights before training, and keep these weights fixed during training

7 mois ago | 1 answer | 0

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Question

"Relu" activation function and "Adam" optimizer for Time delay neural network
I wanna design Time delay neural network, but I can't find the leaky rectified linear unit (Relu) activation function and "Adam...

7 mois ago | 0 answers | 0

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Question

Build Time delay neural network using Deep learning tool box
I wanna build my own Deep neural network which accepts two inputs and estimate two outputs. The input signals of the first layer...

7 mois ago | 0 answers | 0

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Question

workaround for handling a large number of variables in the objective function of lsqnonlin
I want to optimize my objective function w0=zeros(m,1) [w,resnorm] = lsqnonlin(@myfun,w0) How can I dynamically define weight...

8 mois ago | 1 answer | 0

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answer

Question

Defining my objective function using vector of variables for lsqnonlin
I wanna use lsqnonlin for estimating vector of variables of length 6 function F = myfun() global X % regression matrix of...

8 mois ago | 0 answers | 0

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Answered
optimization with many variables - lsqnonlin
I wanna avoid defining these large variables manually. Is there any simple method for this? x(1) x(2) x(3) ...... x(n)

8 mois ago | 0

Question

How to generate polynomial matrix in classification problems ?
I have the fllowing samples [1 2] , [2 0] , [1 1], [3 1], [2 3], [3 3] which correspond to labels y : {0, 0, 0, 1, 1, 1} resp...

10 mois ago | 0 answers | 0

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Question

The Number of coefficents of Time delay neural network
for the following Time delay neural network clc; clear all; close all; [X,T] = simpleseries_dataset; net1 = timedelaynet(1:2,...

12 mois ago | 1 answer | 0

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Question

combining two neural networks (net1 is trained & net2 is untrained) in one bigger network
I have two shallow neural network models net1, net2. I have a trained net1. Then I need to connect a net2 to a net1. Hence I ...

environ un an ago | 2 answers | 0

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Question

Set a specific weight for a connection in neural networks
I have already build my neural network. I wanna set a specific weight for the conection from layer i to layer j foe example .....

environ un an ago | 1 answer | 0

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Question

How to define a multivariable function (for instance an anonymous function) of a number of variables that varies according to the size of an array variable?
I have two vectors input and output ,where is the number of samples I want to solve this problem as nonlinear least-squares...

environ un an ago | 1 answer | 0

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answer

Question

code gernation error using CUDA
I'm trying code generation Using the GPU Coder App as in the folowing link: https://www.mathworks.com/help/gpucoder/gs/gpu-cod...

environ un an ago | 1 answer | 0

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answer

Question

what is the problem of the Power Amplifier curve for this WCDMA measurements ?
I used the follwing link to get the data sets of input and output of PA to simluate PA model https://www.mathworks.com/help/si...

plus d'un an ago | 0 answers | 0

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Answered
Digital Predistortion for PA model
have you find the app that is used in this link ? https://www.mathworks.com/videos/digital-predistortion-for-power-amplifiers-6...

plus d'un an ago | 0

Question

How can I design flat magnitude response IIR filter ?
I want to design flat magnitude response IIR filter to simulate the memory effect of High Power Amplifier nonlinearities