TD-LTE Radio Propagation Model Parameters Correction

With the rapid development of smart grid construction, advanced technology, reasonable economy of electric power communication network has been mature, imminent. Wireless communication technology has the non-line-of-sight, transmission capability, strong ability to resist natural disasters, far transmission distance, large bandwidth, not limited to the ground line structure and other advantages, is very suitable for the construction of electric power wireless network. Among them, TD-LTE is the current mainstream wireless broadband technology, using TD-LTE technology system construction of electric power wireless broadband network in power distribution network, is the development direction of distribution network communication. The same as other mobile communication network, TD-LTE network must also be network planning, parameters of TD-LTE radio propagation model correction work is the basis of planning.This project comes from "a city power supply bureau wireless pilot project", the objective is to build a city with the electric wireless broadband TD-LTE network. Through a city the actual research with grid status, access to a large number of domestic and foreign radio propagation model and its parameter calibration data, demonstrates the necessity of correction parameters of TD-LTE radio propagation model, also introduced some common wireless network planning software, and carries on the contrast analysis.Introduced the common wireless communication signal and its spread mechanism and propagation loss principle, analysis the model formula commonly used macrocell and indoor propagation model and its calibration method, in the study, two wireless signal test method:CW test and pilot test on EC, CW test method is more accurate by the test. On this basis, the principle of data acquisition and data processing method for CW testing methods were summarized.In-depth study of a city radio propagation environment basis, according to the project requirement analysis, proposed the use of SPM model in the model library Huawei UNET propagation model calibration work by Huawei, UNET software and SPM radio propagation model, and the SPM radio propagation model correction algorithm is studied and analyzed, the parameters of a city SPM the radio propagation model correction. According to the project plan, first select and build the8test sites, the8experimental sites including dense urban and suburban sites, and then determining the test frequency and test line, the sampling rate, the8sites on the CW test, in the collection to a large number of signal data, a data processing and analysis, according to the collected data were corrected for SPM propagation model.Finally, the model parameter calibration results and its signal strength coverage prediction results of simulation, the signal strength testing on298network communication, to verify the simulation results of signal strength coverage prediction. In addition several suggestions about the testing process is presented.