Research On LTE Indoor Positioning Technology And Its Optimization

LTE (Long Term Evolution) communication technology project is the largest newtechnology research&development project initiated by3GPPin recent years. With the core ofOFDM/MIMO, this technology can be regarded as a “Quasi-4g” technology. LTE has thecharacteristics of high data rate, packet transmission, delay reduction, wide area coverage andbackward compatibility, etc. With the development of communication services, positioningtechnologies based on base stations are getting increasingly significant. Usually, traditionalsatellite-based positioning systems are only suitable for outdoor environments, while indoorscenarios depend heavily on base station or WIFI positioning. The particularity of the indoorenvironment, such as the wall block, the pedestrians jamming and so on interferes with thepositioning accuracy. How to effectively acquire the positioning information, overcome theinterference, simplify the calculation and improve the positioning precision with the existingcommunication technologies become hot research issues, as well as our main focus in thispaper.In this paper, we first conduct a comprehensive survey on a variety of existingpositioning methods and the available positioning methods in LTE. We then give a detailedanalysis on the LTE protocols that are related to positioning, and discuss the setup of asimulation system for LTE positioning algorithms. We studied multiple canonical positioningalgorithms, including Chan’s algorithm, MPDA algorithm, IMME algorithm, and carriedsimulation to verify the results presented in these papers. Based on the LTE positioningprotocol, we further propose a novel hybrid algorithm of the MPDA algorithm and Chan’salgorithm. Research and experimental results indicate that compared to the past algorithms,the proposed method better overcomes the NLOS (Non-line-of-sight) interference, thereforepossessing higher positioning accuracy and practical application values.