Rel.10 의 TM9 기반 다운링크 Multi-user MIMO 성능분석

Abstract

LTE-Advanced is the evolved version of LTE which is currently in progress at the 3GPP. At present, as the number of smart phone users is rapidly increasing, the demand for evermore capacity is driven largely by video usage and high quality data communication and soon, this let more researchers study about LTE-A all over the world. LTE-A aims to achieveimproved service and communication quality over 3G system at the aspect of throughput,peak data rate, latency, and spectral efficiency. Among various features in LTE-A, themulti-user MIMO(MU-MIMO), in which the base station transmits several streams to multiplereceivers, has expected to give better quality for system. In this paper, we investigate performances of various types of downlink receivers withfixed number of antennas. we first review the development process from LTE to LTE-A. Second we introduce TM9 which is adopted in Rel.10 for MU-MIMO system, including theMU-MIMO system model and the explanation on the algorithm used in system. We alsohave brief introduction about sub-blocking in turbo decoding, finally we compare theperformance between the uncoded case and coded case which is using turbo encoding.