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引用本文：

宋嵩,饶浩,梁显锋.一种宽带零中频接收前端的设计[J].电讯技术，2019，59（12）： - . [点击复制]
SONG Song,RAO Hao,LIANG Xianfeng.Design of a broadband zero-IF receive front-end[J].，2019，59（12）： - . [点击复制]

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一种宽带零中频接收前端的设计
宋嵩,饶浩,梁显锋
0 字体:加大+\|默认\|缩小-
(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)

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925～2 175 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。

关键词: 无人机通信系统零中频接收机数据传输前端设计

DOI：

基金项目:

Design of a broadband zero-IF receive front-end

SONG Song,RAO Hao,LIANG Xianfeng

(1.National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;2.University of Chinese Academy of Sciences,Beijing 100190,China)

Abstract:

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 925~2 175 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.

Key words: unmanned aerial vehicle communication system zero-IF receiver data transmission front-end design