渐行渐远英语怎么说:英语课代表用英语怎么说？

1, abstract:

whether geostationary orbit satellite mobile communication system, or medium / low-orbit satellite mobile communication system， in general，the technical difficulties are: smaller and smaller devices, satellite intelligence, network integration, channel striping, frequency high-frequency， orbit of diversification; as far as the space segment is concerned, the solution can be delt with the transponder, adaptive antennas, inter-satellite links, geo orbit developing satellites、 non-geo orbit a small satellite 、 an orbital integration; as far as the ground segment is concerned，it should be handled well self-adaptive antenna, high-frequency technology, software-defined, individual earth stations, etc.; as far as the system is concerned, it should focus on resolving network interoperability, business integration, management of intelligence and integrated earth observation systems of designing issues。