| 一种用于软件无线电的接收机射频前端电路设计与实现 |
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| 引用本文： | 邓艾,葛利嘉,徐自玲,朱林,双涛.一种用于软件无线电的接收机射频前端电路设计与实现[J].现代电子技术,2010,33(15):37-40. |
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| 作者姓名： | 邓艾 葛利嘉 徐自玲 朱林 双涛 |
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| 作者单位： | 1. 重庆通信学院,重庆,400035
2. 二炮装备研究院,北京,100085 |
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| 摘 要： | 设计了一种用于软件无线电的射频前端电路,该电路可工作于短波、超短波频段（3～89MHz）。电路将天线接收的信号经过前端滤波、AGC、放大处理后,将输出信号稳定到2V,直接送给下级进行A/D采样及基带处理。设计的核心是宽带AGC电路,采用了一种级联VGA的形式,较大地提高了AGC电路的动态范围和线性范围。经过硬件实测,该接收电路灵敏度能够达到-90dBm,动态范围为70dB,并且具有线性度高、噪声系数小等特点。
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| 关 键 词： | 软件无线电 射频前端 自动增益控制 可变增益放大器 |
Research and Design of Receiver RF Front-end Circuit for Software Radio |
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| DENG Ai,GE Li-jia,XU Zi-ling,ZHU Lin,SHUANG Tao.Research and Design of Receiver RF Front-end Circuit for Software Radio[J].Modern Electronic Technique,2010,33(15):37-40. |
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| Authors: | DENG Ai GE Li-jia XU Zi-ling ZHU Lin SHUANG Tao |
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| Affiliation: | 1.Chongqing Communication College,Chongqing 400035,China;2.The Second Artillery Equipment Research Institute,Beijing 100085,China) |
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| Abstract: | A RF front-end circuit for software radio was designed,which can operate on short wave and ultra-short wave frequency band（3～89MHz） .The received signal from antenna turns the input signal to 2Vand then transforms to the next class-analog-to-digital converter circuit through front-end filtering,AGC and amplification processing.AGC is the core of the circuit,which takes a form of cascade VGAS and improves the dynamic range and linear range.Taking hardware practical test,the maximum sensitive is-90dBm,the largest dynamic range is 70dB,the system has good linearity and low noise figure. |
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| Keywords: | software radio RF front-end AGC variable gain amplifier |
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