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yasser


Last seen: plus d'un an il y a |  Actif depuis 2014

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Fmincon optimization for complex vectors
I'm having an optimization problem where the objective function and the constraints have log terms , the optimization variable i...

presque 9 ans il y a | 1 réponse | 0

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Question


negative eigenvalues in sample covariance matrix
clc; clear; N=10; taps=2; snr=0; noise_var=0.05; h1r=randn(1,taps)/sqrt(2); h1i=randn(1,taps)/sqrt(2); h1=complex(h1...

environ 10 ans il y a | 1 réponse | 0

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eigen vectors and values algorithm
i need to know the algorithm by which matlab (or generally how can i) calculate the eigen values and vectors of a Non Symmetric ...

environ 10 ans il y a | 1 réponse | 0

1

réponse

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symbol rate simulation for different wireless standards
how could i generate data with certain symbol rate ? for ex in 802.11 there are several rates from 1 to 54 Mbps depending on ...

plus de 10 ans il y a | 1 réponse | 0

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how does awgn works
if h is normalaized to have 0dbw then after x=awgn(h,5); 1-what formula should i apply on x to see 5db; 2-is 10*log10(nor...

plus de 10 ans il y a | 1 réponse | 0

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fft normalization and parseval
@Matt J please what do u mean by formula for the transform that MATLAB uses is non-orthogonal by a factor of sqrt(N)

plus de 10 ans il y a | 0

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fft normalization and parseval
h=complex(randi([-1 1],128,1),randi([-1 1],128,1)); h=h/std(h); % no h is normalized to unit pow thus var(h)=1 t=1...

plus de 10 ans il y a | 3 réponses | 0

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modulation normalizating factor in matlab
in matlab there is function called modnorm used in (from help) M = 16; % Alphabet size % QAM Modulation hMod = comm.Rectang...

plus de 10 ans il y a | 1 réponse | 0

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ksdensity function for pdf estimation
please some one post an explanation i need it urgently

plus de 10 ans il y a | 0

Question


ksdensity function for pdf estimation
i feed some data to ksdensity but i got a gaussian pdf with peak greater than 1 how is that

plus de 10 ans il y a | 2 réponses | 0

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file i/o problem
i get this msg error Caught "std::exception" Exception message is: Message Catalog MATLAB:services was not loaded from the f...

plus de 10 ans il y a | 1 réponse | 0

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writing complex to a file
i need to write a complex vector to a file from matlab i tried clear; A=complex(randn(1,5)/sqrt(2),randn(1,5)/sq...

plus de 10 ans il y a | 2 réponses | 0

2

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Réponse apportée
fft and random sequence
thanks u all

plus de 10 ans il y a | 0

Question


fft and random sequence
generating 2 random sequences with randn with same variance then applying fft to them would result in 2 sequences of non = varia...

plus de 10 ans il y a | 3 réponses | 0

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