LDPC codes not working in comm toolbox.

Question

Alex Dytso 2014-7-11

回答： Yonatan Marin 2019-4-26

Hello, I want to implement the following code

H = dvbs2ldpc(3/5);

[r,c]=size(H);

henc = comm.LDPCEncoder(H);

hdec = comm.LDPCDecoder(H);

data=logical(randi([0 1],r, 1));

encodedData=step(henc, data);

However, I get the following error "

"Error using LDPCEncoder/step Input must be a column vector of length K."

What am I doing wrong

Answer 1

Yonatan Marin 2019-4-26

Hello Alex,

the problem lies in the data vector. It does not have the necessery size.

It must be k= #columns - #rows, where as the columns and rows of matrix H are meant.

Maybe

data=logical(randi([0 1],size(H,2)-size(H,1),1))

will work...

Best regards,

Yonatan