AN EQUALIZED READ SIGNAL CONTAINING A CONTROLLED PARTIAL-RESPONSE TARGET INTERSYMBOL INTERFERENCE

摘要

A method is disclosed for compensating for intersymbol interference (Fig. 2A) on an optical disc. The method includes measuring an intersymbol linear transfer function. A partial response target frequency response (222) is divided by the intersymbol linear transfer function to obtain a linear equalization filter response (gi). A real signal (ri) from the optical disc is convolved with the linear equalization filter response (gi). This results in the real signal being equalized and containing a controlled partial-response target intersymbol interference (zi). There is also disclosed a method of compensating utilizing a decision feedback equalizer where the target frequency response is either a partial-response or a zero-forcing response.