Lte Link Level Simulation And The Research Of Multi-User Detection Technology

LTE is the3GPP Long Term Evolution project, which uses OFDM and MIMO as its main technical features, and supports higher system bandwidth, and faster data rates. As a transition from3G to4G, LTE achieves a good system performance, LTE-A has also been in extensive attention, the research results of LTE is very rich.This article will use LTE related protocols as the main basis of the simulation and research, and uses matlab simulation tool to do LTE link level simulation and simulation curve to make performance analysis.On the basis of the study of the development of the mobile communication system, the goal of the LTE system, performance indicators, and LTE systems technologies, this paper selects LTE link level simulation as the simulation platform, does a systematic study of the link level simulation technology, and uses the physical layer protocols as the basis,it does module classification, and completes the part of the design of the simulation platform. For the uplink part, the focus is PUCCH channel module structures, this paper analyses multiple formats of PUCCH, and simulates corresponding function on the completed platform, using BLER etc as performance indicators, does performance verification based on the simulation curve.The focus of this research is multi-user detection technology, this paper studies traditional multi-user detection algorithm and a variety of multi-user detectors, a multi-user detection algorithm is selected to complete functional modules and add to the platform, set PUCCH formats2a/2b multi-user detection as a research object, based on the algorithm theoretical analysis and simulation performance curve, the proposed algorithm can effectively improve the utilization of the reference signal, and get better multi-user detection algorithm performance improvements and simulation verify the feasibility of the improved algorithm.For beamforming technology, the paper studies single-user single-stream beamforming and single user double-stream beamforming, selects the GOB and EBB beamforming algorithm and makes a detailed analysis, and completes the algorithm module on the simulation platform, simulates the performance of the two algorithms and gets the analysis results.