论文部分内容阅读
卫星通信自20世纪40年代提出,并经过半个多世纪的发展,已逐渐成为区域与跨洋通信、国家基础干线通信、国际军事通信、行业及企业专网通信乃至个人通信的重要手段。进入到20世纪末,卫星通信面临地面高密度、大容量光纤通信的严峻挑战,但随着信息全球化、互联网、数字多媒体通信以及视频、音频业务的增长,通信个体化、机动性及无缝覆盖的需求,卫星
Since the 1940s, satellite communications has developed for more than half a century, satellite communications have gradually become an important means of regional and transoceanic communications, national backbone communications, international military communications, industrial and corporate private network communications and even personal communications. Entering into the late 20th century, satellite communications faced the severe challenge of high-density and large-capacity optical fiber communications on the ground. However, with the globalization of information, the growth of the Internet, digital multimedia communications and video and audio services, the individualization of communications, mobility and seamless coverage The demand for satellite