| 引用本文: | 李柏渝,孙莉,伍俊,等.大动态范围星载导航接收机AGC电路性能分析与优化设计.[J].国防科技大学学报,2010,32(6):48-52.[点击复制] |
| LI Baiyu,SUN Li,WU Jun,et al.Performance Analysis and Optimal Design of AGC Circuit for Large-dynamic-range GNSS Receivers on Satellite[J].Journal of National University of Defense Technology,2010,32(6):48-52[点击复制] |
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| 大动态范围星载导航接收机AGC电路性能分析与优化设计 |
| 李柏渝, 孙莉, 伍俊, 周力, 欧钢 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| “导航战”条件下要求接收机具有较强的抗干扰性能，射频电路是制约接收机抗干扰性能的瓶颈之一。针对星载导航接收机的特点，同时兼顾弱信号接收与强信号接收的情况，以接收机在整个信号范围内工作时能够抑制的干信比J最大为优化目标，分析了电路允许实现的最大干信比Jmax及射频电路各级增益的求解方法；进而针对纯电阻网络组成的特殊AGC电路，简化了求解方法；给出了该类AGC电路的设计实例，测试结果满足35dB的干信比指标要求。分析方法不仅适用于导航接收机设计，还可推广应用于指导各类接收机的设计。 |
| 关键词: 自动增益控制 噪声系数 动态范围 抗干扰 干信比 |
| DOI： |
| 投稿日期：2010-01-21 |
| 基金项目:新世纪优秀人才支持计划资助项目 |
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| Performance Analysis and Optimal Design of AGC Circuit for Large-dynamic-range GNSS Receivers on Satellite |
| LI Baiyu, SUN Li, WU Jun, ZHOU Li, OU Gang |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Good anti-jamming ability is required under “Navigation Warfare”. However, radio frequency circuit is one of the key parts affecting the anti-jamming performance of GNSS receivers. According to features of the GNSS receiver on satellite, and considering both weak signal receiving and strong signal receiving, this paper analyzed the method of calculating maximum Jammer-to-Signal Ratio(JSR) Jmax which the circuit can realize the gain of each circuit part, aiming at maximize JSR in the whole signal band. Further, the calculation method was simplified for a particular AGC circuit made of resistance network. Lastly, measured results were given for this kind of AGC circuit, which agrees well with the JSR target requirement 35dB. The analytical method can direct the design of not only GNSS receiver, but also various kinds of other receivers. |
| Keywords: automatic gain control(AGC) noise figure dynamic range anti-jam jammer-to-signal ratio (JSR) |
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