The Improved Performance of the Shadow Area User by Using the Relay in the Wireless Communication System

Abstract

Abstract. Nowadays, wireless communication system is actively used in everyday life. The most important thing is the performance improvement. In the MIMO-OFDM system can provide multiplexing gain or diversity gain. These gains are obtained in proportion to the increase of the number of antennas. However, the use of the multiple antennas has the problems. Therefore, this paper proposes a cooperative system for improving of performance in the bad communication environment area.