Implement Of Radio Fixed Monitoring Station And Research On DF Accuracy

With the extensive application of Communication services, the resourses ofwireless spectrum increasingly tense. In order to make radio stations work withoutinterference, the State Radio Management has proposed new requirements on theradio monitoring network construction in the "Twelfth Five-Year" plan. so it has beenan major issue for the local radio managers to expand wireless coverage effectively.By analysis of the cases on radio monitoring network in Lishui City (in ZhejiangProvince), this paper aims to probe into the features of the radio monitoring stations'construction ranging from the radio coverage of the simulation analysis andequipment selection to the lightning-protection facilities' building.According the features of radio management, this paper describes the currentdevelopment of domestic and international radio monitoring facilities. It probes intothe radio propagation, the technology of radio direction measurement and theirdeveloping trends. Particularly, it makes an in-depth research on the relevantinterferometer algorithm. It also carries out the coverage analysis of fixed radiomonitoring stations and the direction accuracy testing.In terms of the calibration test, the first step is to analyze the measurement errorsthrough the distribution of the error curve in the band on the basis of data from actualmeasurement and field test; the second step is to improve the accuracy of radiodirection finding by eliminating the surrounding urban environment affects accordingto the relevant interferometer error correction algorithm; the last step is to improve thepositioning accuracy with the help of Google Earth.