In this paper, we propose a reduced complexity iterative algorithm for joint maximum a posteriori (MAP) detection and interference suppression in orthogonal frequency division multiplex (OFDM)-based space division multiplexing (SDM) systems. The receiver employs an iterative architecture where each iteration stage consists of the estimation of channel/covariance for co-channel interferences (CCIs) and the MAP detection that suppresses interference while detecting the data. The interference suppression is performed in the MAP detection by whitening the interferences through combining the estimated covariance with the conventional MAP detection metric. Extensive simulations demonstrate that the proposed scheme dramatically improves the performance compared to that of the iterative MAP scheme without the suppression. Furthermore, it can effectively suppress both synchronous and asynchronous CCIs without any a priori information on the CCIs.
- Interference suppression
- Spatial multiplexing
- Turbo principle
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics