The GLONASS-K satellite, transmitting a CDMA signal in the L3 band, inaugurates a new era of radionavigation signals for both the Russian system and for international GNSS interoperability. As demand ...

FDMA、TDMA、CDMA，本质上都是为了解决“有限频谱如何服务更多用户、传递更多数据”的核心问题，它们的迭代，就是移动通信效率不断提升的过程··· 手机能随时随地打电话、刷视频，背后藏着一个关键技术——多址接入。简单说，它就像移动通信的“交通 ...

Starting with the first commercial GPS receivers, adding support for incrementally more complex GNSS systems presents significant challenges for GNSS hardware and software developers. The latest ...

Access methods are multiplexing techniques that provide communications services to multiple users in a single-bandwidth wired or wireless medium. Communications channels, whether they’re wireless ...