B3G射频接收机前端设计  

Design of a Front-end for B3G RF Receivers

作　　者：田克纯[1] 周武中[1] 覃远年[1] 赵峰[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电讯技术》2010年第11期94-99,共6页Telecommunication Engineering

基　　金：国家自然科学基金资助项目(60872022)~~

摘　　要：分析了DC-OFDM零中频接收方案,采用两个相邻子载波以分路/合路的方式进行信号处理以降低硬件难度和复杂度。利用ADS软件设计了B3G射频接收机,其低噪声放大器的最低噪声系数为1.7 dB,三阶交调点为-1 dBm;下变频器在频带范围内其增益为12.5 dB,1 dB压缩点-12 dBm,三阶交调点-3 dBm。实验测试结果表明,所设计的前端满足接收机的指标要求,适合于宽带通信系统。DC-OFDM zero-IF receiver scheme is studied in this paper.Two adjacent sub-carriers in splitter/combiner manner for signal processing are adopted to reduce the difficulty and complexity of the hardware.B3G RF receiver is designed through ADS software and the minimum noise figure of low-noise amplifier（LNA） is 1.7 dB,and the third-order intermodulation point is-1 dBm,the gain of down converter within range of the frequency band is 12.5 dB,1dB compression point is-12 dBm,and the third-order intermodulation point is-3 dBm.Experimental test results illustrate that the designed front-end meets the demands of the receiver and is suitable for broadband communication systems.

关 键 词：B3G 宽带通信系统 零中频接收机 前端 子载波 移相器 

分 类 号：TN929.5[电子电信—通信与信息系统]