Low complexity based scheduling methods for multi-user MIMO systems

The process of joint user and receive antenna scheduling is very vital in the uplink direction of multi antenna wireless data communications system with multiple users. With higher number of receive antennas and active users, the search space becomes huge for the joint user and receive antenna scheduling process. It is very difficult to accomplish the searching through the entire search space within the wireless communication time frame. In this paper, low complexity based methods for joint scheduling of users and receive antennas have been proposed. Here, this has been shown that low complexity based scheduling scheme is able to attain system throughput which is quiet close to that of exhaustive search algorithm (by searching the entire search space). Moreover, an interesting observation can be made that the number of complex multiplications and additions required by these low complexity methods is quite less than that of exhaustive search algorithm. (c) 2020 Elsevier B.V. All rights reserved.