Dear Rohan,
In the Mathworks documentation you find information about Reed-Solomon decoder. How the decoder specifically works can be found here . At the bottom of the page (of the first link), an example is shown how this Block can be implemented in Simulink.
A paper where this block is used can be found here (Author Okeke and Iroegbu). Another example can be found at this website .
Good luck! Christiaan
