欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    CEPT ERC REPORT 17-1992 Analysis of Sharing between Earth Exploration Satellite Services (Passive) and Terrestrial Fixed Links at Around 58 GHz (Madrid October 1992)《在大约58GHz频率条件下地.pdf

    • 资源ID:592868       资源大小:167.26KB        全文页数:5页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    CEPT ERC REPORT 17-1992 Analysis of Sharing between Earth Exploration Satellite Services (Passive) and Terrestrial Fixed Links at Around 58 GHz (Madrid October 1992)《在大约58GHz频率条件下地.pdf

    1、STD-CEPT ERC REPORT 37-ENGL 3992 .I 2326434 0035124 933 ERC REPORT 17 European Radiocommunications Committee CERC) within the European Ciderence of Postal Telecommunications Adknistrations (CEPT) ANALYSIS OF SHARING BETWEEN EARTH EXPLORATION SATELLITE SERVICES (PASSIVE) AND TERRESTRIAL FIXED LINKS A

    2、T AROUND 58 GHz Madrid, October 1992 STD-CEPT ERC REPORT L7-ENGL 3992 I 232bll34 0035325 87T sl Copyright 1992 the European Conference of Postai and Telecommunications Administrations (CEFI) STD*CEPT ERC REPORT 17-ENGL 1792 I 232b414 001512b 706 II Frequency (GHz) Near 55 1. 4.1. 2. 3. 3.1. 3.1.2. 3

    3、.1.3. Interference threshold (dBW) Bandwith (MHz) -157 250 ERC REPORT 17 Page 1 ETSI/ETS DEfM4007 (57.2-58.2 GHz) ANALYSIS OF SHARING BETWEEN EARTH EXPLORATION SATELLITE SERVICES (PASSIVE) AND TERRESTRIAL FIXED LINKS AT AROUND 58 GHz Max EIRP 15 dBW INTRODUCTION At the CEW-SE Working Group meting in

    4、 September 1991, members were requested to examine the feasibility of service sharing between the Earth Exploration Satellite Services (EESS) and the terrestrial Fixed Service (PS) in the band 54.25-58.2 GHz. In addition, CEPT Recommendation T/R 22-03 recommended that CEPT should develop necessary s

    5、haring cntena between the services authorised by the Radio Regulations. The object of this report is to provide an analysis of sharing between passive sensors and the FS in the band 57.2-58.2 GHz. The Annex to CCIR Report 984 mentions and discusses propagation factors which affect the transmission o

    6、f a radio wave and considers other technical aspects relating specifically to the space research service. Preferred frequency bands for passive near-Earth space research arc discussed in CCIR Report 693. CHARACTERISTICS OF EESS The EESS sensor interference threshold is contained in CCIR Report 694-3

    7、 and extracted as follows: Table 1. Sensor interference thresholds CHARACTERISTICS OF FS SYSTEMS The FS parameters are contained in the ETSI ETS uropean Technical Standard) and are extracted as follows: Table 2. Max EIRP for the 58 GHz band 58 GHz band Frequency planning is not required in this band

    8、. There are ten channels and ali systems will use a channel spacing of 100 MHz. Applications for Digital Systems Typicai applications would be 2 up to 34 Mbiils for point-to-point local networks, mobile and transportable applications. Applications for Wideband Analogue Systems Point-to-point TV Poin

    9、t-to-point Wideband Video (e.g. Radar Remoting). STDOCEPT ERC REPORT 17-ENGL 1772 W 2326414 0015127 bY2 II ERC REPORT 17 Page 2 4. 4.1 4.2. 4.3 4.4 ANALYSIS From a preliminary examination of the problem, it is concluded that the zenithal attenuation would give the worst-case scenario, bearing in min

    10、d that the atmospheric absorption at 58 GHz in the horizontal direction is about 15 dBlkm Attenuation The zenithal attenuation, extracted from CCLR Report 719 is attached. It will be seen that the fme structure indicates two absorption minima within the frequency range of interest. One gives a zenit

    11、hal attenuation of 95 dB at 57.2 GHz and the other gives a zenithal attenuation of 120 dB at 57.9 GHz. Since both of these are for zero kminitial height it would be prudent to assume an initial height of, say, 250 m to be more representative of Europe. Thus, taking only the worst-case this reduces t

    12、he zenithal attenuation to about 92 dB. EESS The following parameters are extracted from CCIR Reports 693 and 694: Satellite orbit 500 km altitude Interference threshold Sensor antenna effective areas Spreading loss (-10 log 4 lld) -157 dBW in 250 MHZ 8.7 dBm2 -125 dB/m Coverage width 10 km FS The f

    13、ollowing parameters are used in this analysis: Max EIRP 15 dBW Max overhead antenna gain EIRP in the overhead direction (the antenna radiation pattern used here gives the worst-case) 3 dBi -17 dBW Max output power -20 dBw Calculations The maximum allowable interference power (M.A.I.P.) into one spot

    14、 beam of the EESS is equal to: Interference threshold - Spreading losses - Zenithal atmospheric loss - Effective area + Bandwidth factor The maximum number of fixed links is found from 10 log (NO. of Links) = I” - EJRF Assuming that: - all the terrestrial fixed links operate over 100 MHz bandwidth,

    15、- the maximum EIRP in the overhead direction for the fixed links is -17 dB W, - interference may occur from anyhere in the 10 km coverage width, then some 34 thousand fxed links per square km could be implemented in any one channel without causing undue interference to the EESS (passive). 5. CONCLUS

    16、IONS The analysis, tahg worst-case parameters, shows that the EESS (passive) could Co-exist with terrestrial FS in the 57.2-58.2 GHzband. The same conclusion will apply to sharing between space research and fixed services. Although Report 694-2 gives examples of parameters leadmg to various effective areas, the figure here represents the worst-case &est gain). STD-CEPT ERC REPORT 17-ENGL 1992 M 232b4L4 0015128 589 I ERC REPORT 17 Page 3


    注意事项

    本文(CEPT ERC REPORT 17-1992 Analysis of Sharing between Earth Exploration Satellite Services (Passive) and Terrestrial Fixed Links at Around 58 GHz (Madrid October 1992)《在大约58GHz频率条件下地.pdf)为本站会员(孙刚)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开