卫星移动通信技术在应急救灾、交通运输、公共教育、医疗卫生甚至个人移动通信等方面的应用越来越广泛，随着陆地移动通信技术的快速演进，也给卫星移动终端的技术带来新的挑战。现有的卫星移动终端在信道条件较差时，会成为卫星移动通信系统正常通信的瓶颈。为克服信道衰落的影响，提高传输性能，项目组根据卫星移动通信的特点以及与地面协作场景的差异性，提出基于多模卫星移动终端的多路协作网络。针对与卫星转发器、移动终端性能紧密相关的协作时机判定与协作终端选择问题，项目组提出基于地理信息数据库与多目标决策理论的协作时机判定算法，以及终端自组织的中继选择机制。初步研究成果表明，项目组提出的多路、多跳、多模协作场景及相关问题的解决方案，能有效降低信道衰落对系统传输性能的影响，增强系统覆盖，并为推进我国实现宽带星地混合系统提供理论参考与技术支持。

The satellite mobile communication has been widely used in many subjects such as emergency relief, transportation, public education, medical and health care, personal mobile communication, etc.. Therefore, it puts a higher requirement on the satellite mobile terminal. In the related works, we found that the satellite mobile terminals may enter the poor channel in various scenes, thence it may affect the transmission within the satellite mobile communication system. Therefore, aim at the characteristics of mobile satellite communication and the differences of terrestrial cooperation scenarioss, we propose a multiple collaborative network based on the various kind of satellite mobile terminals, in order to overcome the influence of channel fading. According to the problems of cooperation opportunity decision and cooperation terminal selection, we also propose the cooperation opportunity decision algorithm based on the geographic information database and multi-objective decision-making theory. Preliminary research results have shown that the multi-channel, multi-hop, multi-mode collaborative scene and the related problems can effectively mitigate the influence of channel fading on the transmission performance of the system, improve the system's coverage, and provide the theoretical reference and technical support to promote the hybrid broadband satellite-land mobile communication system of China.