Performance Comparison of a Novel Diversity Technique for MIMO-OFDM Systems

In this paper, we propose differential spacefrequency diversity scheme for MIMO-OFDM system with cyclic delay diversity (CDD) in AWGN and Rayleigh channels. And also we apply proposed scheme to convolutional turbo codes (CTC) for playing an important part in MIMO-OFDM system as inner codes. This structure can provide a very close performance to that of the conventional diversity scheme with maximum likelihood (ML) detection without channel estimation block while the receiver structure is highly simplified. We compare in AWGN with Rayleigh channels of its performance and also compare with each code rate and iteration number. The results of this paper can be applicable to the 4G mobile multimedia communication systems.