LAUSR

Abstract A new limited feedback user/antenna scheduling algorithm is proposed for multiple-input multiple-output orthogonal frequency division multiplexing broadcast networks. Feedback of channel state information at users to base station (BS) is inevitable for efficient spectrum utilization by performing the best possible scheduling of users/antennas. The feedback overhead increases with number of users and subcarriers. This enormous feedback information consumes useful bandwidth in uplink channel. Hence, in literature scheduling schemes with clustering of adjacent subcarriers (per-cluster scheduling) are proposed to reduce feedback overhead by considering channel condition of only the center subcarrier of cluster. According to proposed algorithm, channel conditions of all subcarriers are taken into consideration in a novel manner for efficient scheduling. The benefit of this scheme is attaining higher system throughput than the per-cluster scheduling scheme without incurring any additional feedback overhead. Moreover, this scheme achieves higher system throughput for large cluster size and more number of channel taps as compared to per-cluster scheduling scheme. Further throughput is improved by assigning previously unscheduled users randomly to transmit antennas which were not sending data packets to any users previously.