SVD-assisted multiuser transmitter and multiuser detector design for MIMO systems

A novel singular value decomposition (SVD)-based joint multiuser transmitter (MUT) and multiuser detector (MUD) aided multiple-input-multiple-output (MIMO) system is proposed, which takes advantage of the channel state information (CSI) of all users at the base station (BS), but only of the mobile station (MS)'s own CSI, to decompose the multiuser (MU) MIMO channels into parallel single-input-single-output (SISO) channels, where each SISO channel corresponds to the singular values of a particular MS's channel matrix. Based on the proposed scheme, the SVD-based transmission carried out in the context of a single user can readily be extended to the MU case for both the uplink (UL) and downlink (DL). As a beneficial application of the proposed scheme, we improve the system's achievable throughput and highlight its future applications. Index Terms--Multiple-input multiple-output (MIMO), postprocessing, preprocessing, singular value decomposition (SVD), space-division multiple access (SDMA), zero forcing (ZF).