how can i write a matlab code for raptor codes for both encoding and decoding ??

https://en.wikipedia.org/wiki/Raptor_code

[joys roselin]

how to modify these to get a perfect output???

[Walter Roberson]

According to Wireless Algorithms, Systems, and Applications: 6th International Conference, WASA 2011, Chengdu, China, August 11-13, 2011, Proceedings, page 386, heading "IR Cooperating with Raptor Codes", there is no perfect raptor code except possibly for Binary Erasure Channel.

Answer 1

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/38749-raptor-and-fountain-codes