In order to improve the spectrum usage of the up-band of fixed satellite service ( FSS ), an unlicensed access scheme is presented. 为了提高卫星固定业务上行频段的频谱利用效率,提出了一种无授权接入该频段的方案。
An SS / CDMA system can provide both multiple access and switching to a multibeam geostationary fixed satellite service. The uplink access method is based on CDMA, the downlink on code division multiplexing ( CDM ), and the onboard switching on code division switching ( CDS ). SS/CDMA系统能为多波束对地静止卫星的固定业务提供多址和交换功能,该系统上行接入采用CDMA,下行采用码分复用,星上交换采用码分交换,整个系统采取按需分配控制。
Fixed earth station in the radiodetermination satellite service 无线电定位卫星业务地面站