TDOA 技术在GSM 和CDMA 网络中的应用分析.pdfTDOA 技术在GSM 和CDMA 网络

文件名称: TDOA 技术在GSM 和CDMA 网络中的应用分析.pdf

所属分类: 其它

开发工具:

文件大小: 328kb

下载次数: 0

上传时间: 2019-10-14

提供者: weixin_********

下载 (328kb)

不能下载？报告错误

详细说明：TDOA 技术在GSM 和CDMA 网络中的应用分析pdf,TDOA 技术在GSM 和CDMA 网络中的应用分析TDOA GSM CDMA ·405· IPDI e perio 。OTDA-IPDL TA-IPDL TA-IPDL OTDA- IPDL TA-IPDL OTDA-IPDL 3 GSM CDMA GSM CDMA 2000 1/12 N030 OST259 CDMA GSM BCCH 1100m CDMA CPICII 3.84 Mps 78 20 CDMA CDMA IPDI OTD CDMA TDOA CDMA网络在理想环境下 GSM网络在理想环境下 0.8 命GSMA网络车实际信道中 350 ……-SM网络在实际信道中-;…… 06-… 250 +- DMA网络在理想环境 +SM网帑在理想环境下 ““界和和 0 050100150200250300350400450500550 3.544.555 定位误差(m) 基站数目图2两种网络在理想和实际信道中准确性的比较图3两种网络在理想和实际信道中监听能力的比较 Fig. 2 The accuracy comparison between ideal channel Fig 3 The monitoring ability comparison between ideal nd real channel of two networks channel and real channel of two networks TDOA GSM CDMA TDOA 406 IPDI CDMA CDMA CDMA CDMA CDMA 1 SAYED A H TARIGHATA A KHAJEHNOURI N. Network -based wireless location challenges faced in developing techniques for accurate wire- less location information J. Ik FE Signal Processing Magazine 2005 4 22 24-40) 2 WANG K D. Geolocation in urban areas using signal strength repeatability J. IFFF Comm Letters 2001 10 5 411-413 4 WANG Jie -jun HUANG Chao ZHoU Jie et al. The impact of AOA energy distribution on the spatial fading correlation and ser performanee of a circular antenna array C. IFTP International Conference on WOCN 2006 1-4 NLO TOA/AOA 6 WANG(hin-der L I\ Ming+ui. I)ata fusion methods for accuracy improvement in wireless location systems J. IF. WCNC: 2(N(4 1 471 476 TDOA technology application analysis in GSM and CDMA network WANG Xin ZhANg Chaozhu College of Information and Communication Engineering Harbin Engineering L niversity Harbin 150001 China Abstract TDOA Time Difference of Arrival technology mathematics model was produced and it was applied to ac tual GSM Global System for Mobile Communication and CDMA Code Division Multiple Access network. Finally compared GSM network performance with CDMA network by simulation analysis and analyzed two networks charac teristic. It had a good guidance function to how to select location network in practice and high practice application Key words wireless location technology location algorithm TDOA GSM CDMA 395 Study on the degradation of wheat bran by Bacillus cereus YAN Hong YANG Qian ege of Chemistry and Environmental Engineering Harbin University of Science and Technology Harbin 150040 China 2. Department of Life cience and Engineering llarbin Institute of Tech Harbin 150001 China Abstract The degradation of wheat bran by Bacillus cereus Bacillus sp. X10-l-2 was studied by means of measuring concentralion of reducing sugar and soluble lolal sugar acTivities of cellulase and hemicellulase in ler- nenled broth weight loss crysTallinity FTR and surface slrucLure of residue. The results showed that the process of biodegradation of lignocellulose is acLually simultaneous saccharification and fermentaTion. Cellulase and hemi-cellulase activities reached highest level in 12 h and 48 h respectively. Concentration of soluble total sugar ng sugar reached highest level in 4 h and 12 h. Crystallinity of residue had not obvious change after 5 d cultivation. FTR spectrum of residue showed that Bacillus sp. X10-1-2 mainly degraded hemi-cellulose in wheat bran. After 5 d cultivation degradation rate of the main components in wheat bran were 2. 72% 25 61%0 and 1.09% respectively. SEM of surface structure of degraded wheat bran by Bacillus sp. X10-1-2 showed that framework of honeycombed structure was degraded Key words Bacillus cereus wheat bran cellulase degradation

(系统自动生成,下载前可以参看下载内容)