低轨道卫星移动通信

利用这种方法，设计并实现了用于低轨道卫星移动通信（LEOMSAT）的含有5个周向缝的同轴开槽天线。

An improved method is proposed for the evaluation of multislot coaxial line antennas . Based on this method , a multislot coaxial antenna is designed and implemented .

低轨道卫星移动通信系统传播特性的测试与分析

The test and study of system propagation characteristic of LEO mobile satellite communication

针对低轨道卫星移动通信信道的大范围快速时变的多普勒频移特性，提出并分析了双差分相位调制方式（DDPSK）。

An analysis is presented for the performance of double differential PSK demodulator over the LEO mobile satellite channel .

近年来卫星通信新技术不断发展，特别是低轨道卫星移动通信系统受到了人们的广泛关注，其研究与应用已成为各国的战略发展重点。

The new technologies of satellite communication are developed quickly . Especially , the development and applications of low earth orbit satellite mobile communications are strategic consequence of countries in the world .

低轨道卫星移动通信作为未来个人通信系统的重要组成部分，是利用运行轨道比地球同步轨道低得多的一组卫星，实现移动用户之间或移动用户与固定用户之间的通信。

As an essential part of the future personal communication system , LEO satellite mobile communication system uses a group of satellites whose orbit is much lower than synchronous satellite to realize the communication between mobile users .