Method and apparatus of physical layer network coding

摘要

Provided is a physical layer network coding method and apparatus. A relay node determines reliabilities of symbols of nodes, based on a signal received from the plurality of nodes, and generates a transmission signal that maintains reliabilities of symbols that have high reliabilities and excludes components of symbols that have low reliabilities. The relay node generates the transmission signal that reduces an expected power of error, based on the received signal.

主权项

1. A communication method of a relay node, the method comprising:
receiving a signal including a first symbol through a kth symbol that are transmitted from a first node through a kth node, respectively; calculating, based on a predetermined criterion, a reliability of the first symbol through the kth symbol, respectively; selecting one or more symbols from among the first through the kth symbol that have a reliability that is greater than or equal to the predetermined criterion; and generating a transmission signal that maintains the reliabilities of the selected symbols and that excludes components of symbols that have reliabilities which are less than the predetermined criterion where k in reference to the kth node is an integer greater than one, wherein the generating comprises generating the transmission signal to decrease an expected power of error between the transmission signal and the received signal by adjusting a variance of Gaussian noise comprised in the transmission signal.