一种宽带零中频接收前端的设计  

Design of a Broadband Zero-IF Receive Front-end

作　　者：宋嵩 饶浩 梁显锋 Song Song;RAO Hao;LIANG Xianfeng(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100190

出　　处：《电讯技术》2019年第12期1398-1403,共6页Telecommunication Engineering

摘　　要：设计了一种宽带零中频解调接收前端,用于实现无人机通信系统高集成度和简化电路方案等。零中频接收前端在925-2175 MHz载波频段上直接解调10 Mb/s码速率的偏移四相相移键控调制信号,适用于L、S频段的数据传输链路系统。零中频接收电路在10 MHz带宽时,动态增益范围可达到76 dB,射频信号接收灵敏度为-74 dBm。To realize the high integration degree and simplify circuit scheme of the unmanned aerial vehicle(UAV)communications system,a broadband zero intermediate frequency(zero-IF)demodulation receiving front-end is designed.The zero-IF receiving front-end directly demodulates the offset quadrature phase shift keying(OQPSK)modulated signal with a data rate of 10 Mb/s in the range of 925-2175 MHz carrier frequency,which can be used to the L and S-band data transmission link systems.The dynamic gain range of 78 dB and the receiving sensitivity of-74 dBm at a bandwidth of 10 MHz are achieved in the zero-IF receiving circuit front-end.

关 键 词：无人机 通信系统 零中频接收机 数据传输 前端设计 

分 类 号：TN85[电子电信—信息与通信工程]