2011JOURNAL OF ELECTRONICS INFORMATION TECHNOLOGYOpen access

A New AGC Circuitry for Digital Receiver

Wei Cui, Wu Siliang

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Abstract

该文提出一种新的数字接收机自动增益控制(AGC)电路。该电路将传统的两级级连负反馈AGC电路中后级AGC电路的反馈控制改为前馈控制,前后两级AGC电路共用一套功率检波器和环路滤波器,前级AGC电路的增益控制误差能够在后级AGC电路中得到修正,故新的AGC电路的总增益控制误差仅取决于后级AGC电路的增益控制误差。计算机仿真和硬件电路测试结果均表明,与传统的AGC电路相比,该文提出的新AGC电路能够提高增益控制精度,降低AGC响应时间。

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What this paper is about

该文提出一种新的数字接收机自动增益控制(AGC)电路。该电路将传统的两级级连负反馈AGC电路中后级AGC电路的反馈控制改为前馈控制,前后两级AGC电路共用一套功率检波器和环路滤波器,前级AGC电路的增益控制误差能够在后级AGC电路中得到修正,故新的AGC电路的总增益控制误差仅取决于后级AGC电路的增益控制误差。计算机仿真和硬件电路测试结果均表明,与传统的AGC电路相比,该文提出的新AGC电路能够提高增益控制精度,降低AGC响应时间。

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Available abstract

该文提出一种新的数字接收机自动增益控制(AGC)电路。该电路将传统的两级级连负反馈AGC电路中后级AGC电路的反馈控制改为前馈控制,前后两级AGC电路共用一套功率检波器和环路滤波器,前级AGC电路的增益控制误差能够在后级AGC电路中得到修正,故新的AGC电路的总增益控制误差仅取决于后级AGC电路的增益控制误差。计算机仿真和硬件电路测试结果均表明,与传统的AGC电路相比,该文提出的新AGC电路能够提高增益控制精度,降低AGC响应时间。

Key concepts: Automatic gain control, Automatic Generation Control, Computer science, Telecommunications, Physics, Bandwidth (computing), Electric power system, Power (physics)

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