CAJ | 학술논문

准同步数字序列（PDH）微波室外单元作为准同步数字序列系统的射频收发单元，主要实现收发信号的变频和功率变换，为系统收发中频提供无线的收发通道。文章详细介绍了系统频率规划、工作原理、总体设计、具体技术指标及实现。
준동보수자서렬（PDH）미파실외단원작위준동보수자서렬계통적사빈수발단원，주요실현수발신호적변빈화공솔변환，위계통수발중빈제공무선적수발통도。문장상세개소료계통빈솔규화、공작원리、총체설계、구체기술지표급실현。
Pseudo-synchronous Digital Hierarchy (PDH) microwave outdoor units (ODU) ,as the RF transceiver unit of PDH system, mainly realizes the frequency conversion and power conversion of the transceiver signal, and provides the transceiver channels for the system to send and receive the Intermediate Frequency(IF). This paper expounds the frequency plan, working principle, overall design, specific technical indicators and the implementation of the system.