Introduction - If you have any usage issues, please Google them yourself
PPP is used in frequency division duplex to solve Interference Issue.
a Poisson point process is a particular kind of random process by which a set of isolated points are scattered about a line or a plane or a three-dimensional space or any of various other sorts of spaces. Often the term Poisson process is used to mean a Poisson point process in which the space in which isolated points are randomly scattered is a line, which in many applications represents time.