First introduces the whole rf system, including system specification, duplexmethod, key technology, interface definition and etc.
首先研究了整个射频系统的系统指标、双工方式、关键技术、系统组成和接口定义。
2
Time Division Duplex (TDD) is a kind of duplexmethod of communication system, by which uplink and downlink transmissions are time separated in mobile communications.
时分双工 （TDD）是一种通信系统的双工方式 ，在移动通信系统中用于分离接收和传送信道。
3
The porous hydroxyapatite-bioglass duplex ceramic was prepared by the dipping method with polymer foam.