Abstract: In order to solve the problems of signal attenuation and low transmission efficiency in low-orbit satellite data transmission, this paper analyzes and implements an effective modulation and ...

Providers say they were ordered to cut connections United Nations calls for restoration of internet Flights, banking and health services disrupted Taliban has given no immediate explanation KABUL, ...

Abstract: The three service functions traditional communication, navigation, and telemetry and remote control are independent and occupy different frequency band resources. To alleviate the tight ...