卫星通信中LXI总线收端模块设计  

Design of LXI Bus Receiver Modules in Satellite Communication

作　　者：张亮[1] 黄珍元[2] 梁俊[1] 

机构地区：[1]空军工程大学电讯工程学院,西安710077 [2]中国电子科技集团公司第四十一研究所,山东青岛266555

出　　处：《电讯技术》2012年第2期220-224,共5页Telecommunication Engineering

摘　　要：研制了卫星通信中LXI总线收端模块,较好解决了卫星通信中小站分散、技术保障困难的问题。下变频模块采用4次变频,将射频信号变为21.4MHz与7.5MHz中频信号。数字化仪模块A/D采样,将中频模拟信号转换成中频数字信号。采用FPGA电路辅助的方式实现IEEE1588协议,实现了30 ns同步。The receiver modules are developed based on about decentralization and difficult technique guarantee LXI bus so as to preferably solve the station problem in satellite communication. The down frequency module coverts radio frequency to 21.4 MHz and 7.5 MHz through 4 times frequency conversion. The digitizer module coverts intermediate and analog signals to intermediate and digital signals through A/D sampling. Realization of IEEE1588 based on Flea has achieved 30 ns synchronization.

关 键 词：卫星通信 LXI总线 下变频模块 数字化仪模块 合成仪器 

分 类 号：TN915[电子电信—通信与信息系统]