Interference analysis of the public walkie-talkie on the Cospas-Sarsat system’s uplink
Yuqi Lv, Qifeng Ding, Xiaoyong Liu, Junchi Zhang, Hua Shu Yang · 2020
In China, the public walkie-talkie operates in the band 409.750MHz ~ 409.9875MHz, which may cause harmful interference to the adjacent frequency band, a security application--Cospas-Sarsat system. Considering the popularity of the public walkie-talkie and the development trend of multi-function integration of the phone, it is necessary to study the interference of the public walkie-talkie on the global satellite search and rescue system. Firstly, this report investigate the situation of the public walkie-talkie and the Cospas-Sarsat system. Secondly, the interference scenario of the system is analyzed. Based on the above contents, a reasonable interference calculation method is designed, and the interference situation is analyzed using the method.