Question

Any help at ofdm modulation

Hello i am trying to create an ofdm system bases on this: where d is a 2-Pam input d[k] ,for k=1...64 My code so far is : %...

3 mesi ago | 0 answers | 0

Question

How to add zeros in front of an array

Hello , i want to add zeros in front of an array but i want to do that for 3 times and each time the zeros are increasing by1 ....

3 mesi ago | 1 answer | 0

Question

How can i multiply cell arrays?

Hello , i want to multiply an array H which is 2x2 cell array (each cell contains a 1x500 array) with an array X which is 2x1 a...

4 mesi ago | 1 answer | 0

Question

How to create a 2x2 matrix?

Hello , i want to create a 2x2 matrix like that : , h is 2x500 matrix . So , i have to create a 2x2 matrix that each cell co...

4 mesi ago | 2 answers | 0

Question

How can i implement maximum ratio combining method(MRC)?

Hello i want to implement maximum ratio combining . I have 2 antennas(recievers) and one transmitter .So far my code is like thi...

4 mesi ago | 0 answers | 0

Question

How to create input of linear equalization channel?

Hello , i want to create the input channel to linear equalizer . The project is asking to create random complex channel h ,4-QA...

5 mesi ago | 0 answers | 0

Question

What cut-off of an output actually means in zero-forcing equalization?

Hello , i have a project and i was asked to equalize a channel( with zero forcing which i did like this : i calculated the ze...

5 mesi ago | 0 answers | 0

Question

Why am i getting the : errir using inv ,Matrix must be square?

Hello , i have a created a toeplitz matrix H which is 12x8 .I want to run the command: y=inv(H) but the compiler says : Error ...

5 mesi ago | 1 answer | 0

Question

How can i create a convolution using toeplitz matrix?

Hello , i want to create a convolution between two signals but i need to make this happen using the teoplitz command that creat...

5 mesi ago | 1 answer | 0

Question

How can i create a sequence?

Hello, I have a sequence Xn: xn ∈ {(±1, ±i)} means xn is an element of the set [-1-i, -1+i, 1-i, 1+i] and i want to create thi...

5 mesi ago | 1 answer | 0

Question

How can i create a sequence?

Hello, i want to create a sequence {xn} , xn ∈ {(±1, ±j)} .I want to create this sequence for n=1 to N=100 .How can i create ...

5 mesi ago | 0 answers | 0

Question

How to create a complex normal i.i.d.?

Hello , i want to create a i.i.d CN(0,σ^2) I create the variable like that : x=sqrt(var/2)*(randn+1i*randn); Is this corre...

5 mesi ago | 1 answer | 0

Question

How can i find the experimental and theoritical BER ?

Hello , i am given r[k]=h[k]s[k]+awgn , k=1,...N(N=100) where s[k] is a 4-QAM modulation and h[k] is a flat fading channel . H...

6 mesi ago | 0 answers | 0

Question

How can i find the BER of 4-QAM ?

Hello , How can i find the BER of 4-QAM ? thank you.

6 mesi ago | 1 answer | 0

Question

how can i convert 1xn to mxn matrix ?

Hello i have a variable x[k] k=1,...100 that takes some random numbers as an input, so i have a 1x101 matrix. How can i creat...

6 mesi ago | 2 answers | 0

Question

How can i create MxN matrix?

Hello , i have a package r[k] that contains k=1,...N symbols(N=1000) .So , i have a matrix 1x1001. I want to make l=5000 packag...

6 mesi ago | 1 answer | 0

Question

why i get the undefined variable message?

I have this code for QAM: p=(sign(randn(N,1))+2)/2; for i=1:length(p/2)-1 if p(i)==0 && p(i+1)==0 s(i)=1+1i; ...

6 mesi ago | 1 answer | 0

Question

How to calculate qammod for discrete time using for-loop?

Hello,i want to use the function qammod to create a 4-QAM signal. I want to create 4-QAM for the signal y[k] ,k=1,...N (N=100) ...

6 mesi ago | 0 answers | 0