How to find null space of ldpc parity check matrix

[laxmanababu]

ldpc parity check matrix

Dear friends,

can you explain me the null space of ldpc parity check matrix using matlab.

 

[puripong]

If you have parity check matrix (H) of LDPC code
Performing Gaussian Elimination on it.
Then the parity check matrix in systematic form is obtained (H = [Ih P]).
the nullspace (G) of parity check matrix (H) is in the form
G = [P' Ig ] where H*G' equal to null matrix.

 

[lambwin]

uh, G=[P' I] is right, i think.

 

[puripong]

Yes, you're right
Thanks