Original: Instances of dirty paper coding include Costa precoding (1983)  , Tomlinson-Harashima precoding (1971)     and the vector perturbation technique of Hochwald et al.
Simplified: People have thought up several dirty paper codes, including Costa precoding (1983)  , Tomlinson-Harashima precoding (1971)     and the vector perturbation technique of Hochwald et al.