박승영박사의 "Complexity-reduced Iterative MAP Receiver for Interference Suppression in OFDM-based Spatial Multiplexing Systems" 가 IEEE Trans. VT 9월에 게재 될 예정임을 알려드립니다.

In this paper, we propose a reduced-complexity iterative algorithm for joint maximum a posteriori (MAP) detection and the co-channel interferences (CCIs) suppression in orthogonal frequency division multiplex (OFDM)-based spatial multiplexing systems, a.k.a. multi-input and multi-output (MIMO) systems. The receiver employs an iterative architecture where each iteration stage consists of channel/covariance estimation for CCIs and MAP detection, which suppresses interference while detecting the data. The interference suppression is performed in the MAP detection by whitening the interferences through combination of the estimated covariance with the conventional MAP detection metric. Moreover, a complexity reduction scheme is proposed for implementing an iterative MAP receiver without incurring performance degradation. Extensive simulations have demonstrated that the proposed scheme dramatically improves the performance compared to that of an iterative MAP scheme without interference suppression. The receiver complexity is significantly reduced with negligible performance degradation. Furthermore, it can also effectively suppress not only synchronous but also all kinds of asynchronous CCIs without any a priori information on the CCIs.