WCDMA直放站上行链路自动增益控制电路  

AGC circuit for WCDMA repeater uplink system

作　　者：张丹[1] 南敬昌[2] 刘元安[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876 [2]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第3期398-401,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(60573111);广东省教育部产学研结合示范基金资助项目(2007B090200012)

摘　　要：为了使弱信号区或盲区的不同移动台能顺利进行通信,提出了适用于WCDMA直放站上行链路的负反馈双环自动增益控制(AGC)电路,并采用两级射频AGC电路分别控制上行链路输入端和输出端的增益,达到自动控制输出功率的目的。利用电路设计软件ADS分析构建系统的性能,仿真结果显示:有AGC的直放站上行链路系统频率和信道选择性好、输出功率稳定可调、AGC增益范围大和输出功率范围宽。该系统能够较好解决移动台盲区通信的问题。In order to communicate successfully for various mobile stations in signal weak and dead zone, a dual-loop automatic gain control （AGC） circuit associated with an inverse-gain feedback is presented, which is used in WCDMA repeater uplink system. The repeater uplink employs two-stage radio frequency AGC circuit, which adjusts input and output part gain of the repeater respectively, so that the system can operate normally and control automatically the output power. Agilent advanced design system （ADS） is used as a simulation tool to analyze the performance. The results indicate that it performs well, and it has the characteristic of good frequency selectivity and channel selectivity, steady controllable output, large range of AGC gain and wide range of output power. Thus, the proposed system is suitable for solving the problem of the dead zone in WCDMA communication.

关 键 词：自动增益控制(AGC) 直放站 上行链路 WCDMA 

分 类 号：TN929.5[电子电信—通信与信息系统]