MODULATION DEVICE FOR NETWORK CODED SYMBOL IN BIDIRECTIONAL RELAYING SYSTEM AND DATA RELAY METHOD THEREOF

摘要

The present invention relates to a modulation apparatus of a network coded symbol in a bidirectional relay system using a network coding using an asymmetric channel, and a data relay method using the same. The modulation apparatus of the present invention provides network coding for data received through a bidirectional link. (network coding) is a network coding unit; And a mapper configured to form a transmission symbol pair mapped to two different constellations by performing quadrature amplitude modulation (QAM) modulation on the network coded data.;According to the present invention, it is possible to detect a received signal with high reliability at the destination node by improving the bit error rate performance of the network coded signal broadcasted to the destination node by the relay node using the network coding in the bidirectional relay system.;Network coding, modulation, bidirectional relay