This paper highlights the Space Time Frequency Block Codes (STFBC) that exploit both spatial, time and frequency diversity can be designed using orthogonal frequency division multiplexing (OFDM). Intercarrier interference (ICI) self-cancellation schemes were often employed in many OFDM systems as a simple and effective approach to suppress ICI caused by carrier frequency error (CFO). In this paper, we propose a space time frequency block coding technique MIMO-OFDM system with ICI self-cancellation of data conjugate method, which is capable of both error correction and ICI reduction produced by frequency offset (FO). Then, the system performance of the data-conjugate method with diversity techniques is compared with those of the data-conversion method. As results, it can be shown that the STFB codes MIMO-OFDM system with FO, the data-conjugate method can make remarkable improvement of the BER performance and is better than the data-conversion method and the conventional OFDM system.

Orthogonal Frequency Division Multiplexing (OFDM), Multiple Input Multiple Output (MIMO), intercarrier interference self cancellation, Space Time Frequency Block Codes (STFBC).