4.4 dB NF,44 dB SFDR单片UWB接收机系统级设计  

Analysis and Design of System Level for 4. 4-NF,44-d B SFDR UWB Receiver

作　　者：沈怡然[1] 马学条[1] 王光义[1] 

机构地区：[1]杭州电子科技大学电工电子实验中心,浙江杭州310018

出　　处：《实验室研究与探索》2015年第7期53-57,共5页Research and Exploration In Laboratory

摘　　要：当前超宽带（UWB）技术研究的热点集中于用芯片组或者是单芯片来实现UWB通信。本文以TI和Intel提出的方案为基础,研究短距离（2-10 m）,高速率（110-480 Mb/s）的UWB射频接收机系统。描述了工作于＂模式1＂频段（中心频率分别为3 432,3 960,4 488 MHz）的OFDM-UWB片上接收机系统.此系统采用图1所示的直接变频结构。将公式设计成Excel表格,计算出接收机系统的各项系统性能指标,最后给出了仿真结果。所设计的接收机系统具有大约4.3-4.4 d B的噪声系数（NF）,44 d B左右的无失真动态范围（SFDR）,完全满足TI标准中的接收机规范,为下一步电路级设计作好了准备。At present,there are two main standards in competition,one is the Motorola＇s DSSS-UWB,the other one is the Intel and TI＇s OFDM-UWB. In this paper,research is based on TI and Intel＇s standard. A short range（ 2 - 10m）,high speed（ 110-480 Mb / s） UWG RF receiver system is studied. The system on chip designed for OFDM operating in the ＂Mode 1 ＂bands（ centered at 3 432 MHz,3 960 MHz,and 4 488 MHz） is described. Direct conversion architecture is adopted and illustrated. The receiver system performance evaluation can utilize the formulas presented and can be carried out by means of Excel spreadsheet calculation. Finally,the simulation results are shown. The designed receiver has 4. 3-4. 4 d B NF and 44 d B SFDR.

关 键 词：超宽带 正交频分复用 噪声系数 无失真动态范围 接收机灵敏度 

分 类 号：TN4[电子电信—微电子学与固体电子学]