高速DAC在数据广播分发设备中的应用  

The application of high-speed DAC in data broadcast distribution equipment

作　　者：郝广凯 陆格格 章玉珠 芮涛 朱英玮 HAO Guangkai;LU Gege;ZHANG Yuzhu;RUI Tao;ZHU Yingwei(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《长江信息通信》2022年第4期54-56,共3页Changjiang Information & Communications

摘　　要：数据广播分发系统能够将卫星有效数据广播分发给地面接收设备,实现卫星覆盖范围内所有用户终端数据传输。目前常用数据广播分发设备采用传统应答机设计思路,信息处理流程为先低中频调制再进行上变频滤波及放大后输出,产品功耗和体积较大,不能满足卫星小型化和轻量化需求。采用基于高速DAC平台的数据广播设备利用软件无线电的思想,可实现S波段直接扩频调制和输出,取消传统设备的上变频处理,从而更加方便实现产品的小型化和轻量化。The system of data broadcast distribution can broadcast satellite data to receiver,which can realize data transmission of all user terminals within the satellite coverage range.The infromation processing flow of the traditional machine of data broadcast distribution based on the conventional responder is low if modulation first.Then the information is completed with upconversion filtering.The machine with large power consumption and volume cann’t satisfy the demand of miniaturization and lightweighting.Other than the traditional analog products,the data broadcast distribution product bassed on the high speed digital-to-analog converter(DAC),use software radio.The product can realize spread spectrum modulation on S-band,which cancel up-conversion in traditional products in order to radlize the product miniaturization and weight reduction.

关 键 词：高速DAC 数据广播分发 电路设计 

分 类 号：TN938[电子电信—信号与信息处理]