MATLAB: How reshape the separated signal to original signal

codedspDSP System ToolboxfftifftMATLABmatlab codernegativemofdmpositive

hi every one

If I have the following vectors

x= [1 2 -6 9 -7 8 -8 -5 2 4 -6 4 -4 -5 -7 6 10 2 3 7 -8 9 -8 -5 4 -6]

Xp=x(x>0)

Xn=x(x<0)

after separated the signal is transmitted

fr=[length(Xp), Xp, Xn]

then in the recevier Rx

rp=fr(2:fr(1)+1); % positive Rx

rn=fr(2 + fr(1):end); %negativ Rx

then I want to reshape the vector as original vectors

can any one help me

thank u very much

Best Answer

YOu pick the indices and get what you want.

x= [1 2 -6 9 -7 8 -8 -5 2 4 -6 4 -4 -5 -7 6 10 2 3 7 -8 9 -8 -5 4 -6]
Xp=x(x>0) ; idxp = x>0 ; 
Xn=x(x<0) ; idxn = x<0 ;
% after separated the signal is transmitted 
fr=[length(Xp), Xp, Xn]
% then in the recevier Rx
rp=fr(2:fr(1)+1);       % positive Rx
rn=fr(2 + fr(1):end);   %negativ Rx
iwant = zeros(size(x)) ;
iwant(idxp) = rp ;
iwant(idxn) = rn ;

Note that, the above code can be optimized by using completely indices.

Related Solutions

MATLAB: Separate the positive values from the negative values

Xp=X(X>0)
Xn=X(X<0)
Xn=abs(Xn)

MATLAB: How to modify a matrix to change the entries >=0 and multiply it by 5 AND to change the entries <0 and add 2 to those entries

Start with "If an entry in B is greater than or equal to zero": You can either run a loop over all elements of B or use "logical indexing":

% Linear indexing:
for k = 1:numel(B)
   if B(k) >= 0
     ...
   end
end

Or two indices for rows and columns:

for r = 1:size(B, 2)
  for c = 1:size(B, 1)
    if B(r, c) >= 0
       ...
    end
  end
end

Or "logical indexing":

index = (B >= 0);
disp(B(index))

Now try to use this to modify B. Use the mentioned terms to search in the documentation and in the internet.

Best Answer

Related Solutions

MATLAB: Separate the positive values from the negative values

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