A NEW LOW-COST DEMODULATOR FOR 2.4 GHZ ZIGBEE RECEIVERS

作     者：Yu Yunfeng Meng Xin Xiao Shimao Ma Chengyan Ye Tianchun Yu Yunfeng Meng Xin Xiao Shimao Ma Chengyan Ye Tianchun(Institute of Microelectronics of Chinese Academy of Sciences(CAS),Beijing 100029,China)(Hangzhou Microelectronics of Chinese Academy of Science Ltd.,Hangzhou 310053,China)

作者机构：Institute of Microelectronics of Chinese Academy of Sciences（CAS） Beijing 100029 China Hangzhou Microelectronics of Chinese Academy of Science Ltd. Hangzhou 310053 China 

出 版 物：《Journal of Electronics(China)》 (电子科学学刊（英文版）)

年 卷 期：2009年第26卷第2期

页      面：252-257页

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：Supported by Zhejiang Province Important Sci-Tech Foundation Item (No.2006C11107) 

主　　题：ZigBee Demodulator Minimum Shift Keying(MSK) Low-cost Symbol synchronization 

摘      要：A new low-cost demodulator for ZigBee receivers satisfying requirements of IEEE802.15.4 standard is presented,which is designed for ISM 2.4 GHz band and based on Zero-IF *** demodulator extracts symbols directly from baseband signal rather than recovering PN code chips,so its structure is *** main techniques are used to improve the performance of *** is Phase-Axis Crossing Detector(PACD) which detects the phase correlation of baseband *** other is symbol synchronization and sampling clock correction *** result shows that this demodulator performance,Symbol Error Rate(SER) and Packet Error Rate(PER) meet IEEE 802.15.4TM standard requirements and the demodulator can handle frequency offset in excess of 200 kHz,involving a Zero-IF receiver with a Noise Figure(NF) lower than 17 dB,which is easily imple-mented in standard CMOS technology.