一种新的数字接收机AGC电路

崔嵬; 吴嗣亮

doi:10.3724/SP.J.1146.2008.00163

一种新的数字接收机AGC电路

doi: 10.3724/SP.J.1146.2008.00163

崔嵬,
吴嗣亮

计量
- 文章访问数: 3325
- HTML全文浏览量: 117
- PDF下载量: 1675
- 被引次数: 0
出版历程
- 收稿日期: 2008-01-30
- 修回日期: 2008-05-17
- 刊出日期: 2008-08-19

A New AGC Circuitry for Digital Receiver

摘要

摘要: 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。
- 数字接收机;自动增益控制(AGC);级连结构;前馈控制
Abstract: A new Automatic Gain Control (AGC) circuitry is proposed in this paper. The feedback control scheme of subsequent AGC closed-loop in conventional AGC frame is converted to forward control scheme in new circuitry. The power detector and the loop filter are shared by two cascaded AGC loops in new AGC circuitry, so the gain errors in foregoing AGC closed-loop can be corrected by subsequent AGC closed-loop, and total gain errors of new AGC circuitry is determined only by the gain errors in subsequent AGC closed-loop. Simulation and measurement results verify that the new AGC circuitry not only improved the gain control precision, but also decreased the response time, compared with conventional AGC circuitry.

HTML全文

参考文献(1)

Jeon O, Fox R M, and Myers B A. Analog AGC circuitry fora CMOS WLAN receiver[J].IEEE Journal of Solid-StateCircuits.2006, 41(10):2291-2300[2]刘世刚, 葛临东, 袁伟. 一种短波数字接收机模拟前端设计方案. 微计算机信息, 2005, 21(11): 148-150.Liu S G, Ge L D, and Yuan W. Analog front-end design of HFdigital receiver. Micro-computer Information, 2005, 21(11):148-150.[3]Kim C. Digital automatic gain control for software radioW-CDMA base stations[J].IEEE Trans. on Electronics Letters.2003, 39(3):318-320[4]Quoc H D, Quan L, and Chang W K. A 95-dB linear lowpowervariable amplifier[J].IEEE Trans. on Circuits andSystems-I.2006, 53(8):1648-1657[5]李学初, 高清运, 秦世才. 混合模式AGC设计[J].电子与信息学报.2007, 29(11):2791-2794浏览[6]金俊坤, 吴嗣亮, 孙武. 某型伪码测距雷达的数字AGC设计.现代雷达, 2005, 27(10): 75-78.Jin J K, Wu S L, and Sun W. Design of a digital AGC in aPN-code ranging radar. Modern Radar, 2005, 27(10): 75-78.[7]Ser W O and Ridwan R M. Dual-rate automatic gaincontroller for WCDMA mobile receiver. IEEE WirelessCommunications and Networking Conference, Kowloon, 2007:212-216.[8]Chown G A and Hartman R C. Design and experience with afuzzy logic controller for automatic generation control (AGC)[J].IEEE Trans. on Power Systems.1998, 13(3):965-970[9]Lai J T, Wu A Y, and Lee C H. Joint AGC-equalizationalgorithm and VLSI architecture for wirelined transceiverdesigns[J].IEEE Trans. on VLSI.2007, 15(2):236-240[10]Okjune Jeon, Fox R M, and Myers B A. Analog AGCcircuitry for a CMOS WLAN receiver[J].IEEE Journal ofSolid-State Circuits.2006, 41(10):2291-2300

施引文献

资源附件(0)

访问统计