OFDM Cooperative Relay Transmission and Interference Elimination Technology

Abstract

Abstract Aiming at Orthogonal Frequency Division Multiplexing (OFDM) cooperative relay transmission system, a scheme of interference elimination between OFDM relays based on precoding was proposed for OFDM system continuous relay network. The new scheme precodes the frequency domain signals of the source nodes alternately, maps the expected signals and interference signals of the relay to two orthogonal subspaces. The interference elimination of the relay is achieved and the expression of the optimal precoding matrix is deduced. The application in OFDM system can effectively eliminate the influence of multipath effect on system performance. The effectiveness of the scheme is verified by simulation experiments.