论文部分内容阅读
人类不久将可利用移动电话(大哥大)实现真正的全球性通话,这就要借助于卫星通信和研制新的移动式电话机。 国际海事卫星组织计划耗资25亿美元建成全球移动式电话系统,2000年投入使用。国际海事卫星组织研制的新型卫星电话只有目前使用的移动电话那么大。它的天线犹如一支铅笔。这种电话既可进行地面通话又可自动转换进行越洋卫星通话。 为了同国际海事卫星组织竞争,美国摩托罗拉
Humans will soon be able to make real global calls using mobile phones (big brother’s) thanks to satellite communications and the development of new mobile phones. Inmarsat plans to spend 2.5 billion U.S. dollars to build a global mobile phone system and put it into use in 2000. The new satellite phones developed by Inmarsat are only as big as the mobile phones currently in use. Its antenna is like a pencil. This kind of telephone can carry on the terrestrial satellite conversation while being able to carry on the terrestrial conversation automatically. In order to compete with Inmarsat, the United States Motorola