General PhD applications with most of the details on the department webpage.
There are two streams: Post-Bachelor and Post-Master. PB is generally five years for ECE department, while PM is usually 4.
Online application requires personal statement of purpose, reference letters from previous professors, GRE General Test, (English exams if your first language is not English, and in some cases can be waived), Transcripts, and other supplementary materials.
It is also help to contact professors you are interested to work with.