Matlab Help QPSK with ZeroForcing plz

junkers

Heia....

I Need Help in Matlab Command with QPSK for ZeroForcing and ask about something if i have

N=2;

Symbols = [ 1+j 1-j -1+j -1-j ]';

1- How to make X choose a 2 random from Symbols ?

2- How to calculate the closest consellation point for each decoded received Symbol ?

3- How to move each calculated symbol to the nearest consellation point ?

I need Matlab commands for this 3 questions

thanks alot....

shwaip

index = ceil(rand(1,2)*4);
symbols(index)

will give you two random symbols

dist = Symbols - rx_symbol;
[min_dist, index] = min(dist)

will find you the closest symbol and the distance to it.

junkers

thanks alot mate and can u tell me what is what is rx_Symbols is ?? and when i run the programe i got error said undefined function or varable 'rx_symbols'

can u check if this code is right or wrong thanks alot


N = 2;

Symbols=[1+j 1-j -1+j -1-j];

H = randn(N,N) + j*randn(N,N);

X= ceil (rand (1,2)*4);
Symbols(x)

% what is the closest constellation point for each decoded received symbol
dist = Symbols - rx_symbol;

% move each calculated symbol to nearest constellantion point
[min_dist, index] = min(dist)

drasnor

You need to define rx_symbol yourself as the decoded received symbol you mentioned in (2). Remember that MATLAB is case-sensitive. You should probably also ask your professor for assistance.