ITU-R F 1107-2-2011 Probabilistic analysis for assessing interference into the fixed service from satellites using the geostationary orbit《计算干扰的固定业务从卫星占领地球静止轨道概率分析》.pdf
《ITU-R F 1107-2-2011 Probabilistic analysis for assessing interference into the fixed service from satellites using the geostationary orbit《计算干扰的固定业务从卫星占领地球静止轨道概率分析》.pdf》由会员分享,可在线阅读,更多相关《ITU-R F 1107-2-2011 Probabilistic analysis for assessing interference into the fixed service from satellites using the geostationary orbit《计算干扰的固定业务从卫星占领地球静止轨道概率分析》.pdf(15页珍藏版)》请在麦多课文档分享上搜索。
1、 Recommendation ITU-R F.1107-2(05/2011)Probabilistic analysis for assessing interference into the fixed service from satellites using the geostationary orbitF SeriesFixed serviceii Rec. ITU-R F.1107-2 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient
2、and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted. The regulatory and policy functions of the Radiocommunication Sector are perf
3、ormed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups. Policy on Intellectual Property Right (IPR) ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms
4、to be used for the submission of patent statements and licensing declarations by patent holders are available from http:/www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be f
5、ound. Series of ITU-R Recommendations (Also available online at http:/www.itu.int/publ/R-REC/en) Series Title BO Satellite delivery BR Recording for production, archival and play-out; film for television BS Broadcasting service (sound) BT Broadcasting service (television) F Fixed service M Mobile, r
6、adiodetermination, amateur and related satellite services P Radiowave propagation RA Radio astronomy RS Remote sensing systems S Fixed-satellite service SA Space applications and meteorology SF Frequency sharing and coordination between fixed-satellite and fixed service systems SM Spectrum managemen
7、t SNG Satellite news gathering TF Time signals and frequency standards emissions V Vocabulary and related subjects Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1. Electronic Publication Geneva, 2011 ITU 2011 All rights reserved. No part of
8、this publication may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.1107-2 1 RECOMMENDATION ITU-R F.1107-2*Probabilistic analysis for assessing interference into the fixed service from satellites using the geostationary orbit (1994-2002-2011) Scope This Recom
9、mendation provides methods for assessing sharing criteria for interference from satellites using the geostationary orbit into digital fixed wireless systems. Annex 1 provides the approach to calculate interference into digital systems, and provides an outline of a calculation methodology and include
10、s examples and a software model to implement the methodology. The ITU Radiocommunication Assembly, considering a) that emissions from space stations operating in the geostationary orbit and sharing the same spectrum may produce interference in receiving stations of the fixed service (FS); b) that it
11、 may be impractical to coordinate between the many terrestrial stations and the many space stations, and that, therefore, sharing criteria should be established to preclude the need for detailed coordination; c) that in devising such sharing criteria, account needs to be taken of the operational and
12、 technical requirements of networks in the satellite service as well as of the requirements of the FS and measures available to them; d) that it has been determined that a probabilistic basis for developing sharing criteria results in a more efficient use of the spectrum than from criteria developed
13、 using worst case analysis; e) that it is difficult and burdensome to assemble sufficient statistically accurate information about real existing and planned terrestrial and satellite system stations; f) that computer simulations of FS and satellite services operating in the geostationary orbit can g
14、enerate statistically accurate information suitable for determining sharing criteria for a wide variety of sharing scenarios, recommends 1 that information derived from computer simulations of FS and satellite services operating from the geostationary orbit and using the same spectrum may be accepta
15、ble for developing sharing criteria; 2 that when developing sharing criteria with respect to digital systems in the FS, the material in Annex 1 to assess interference from FS into digital FS should be taken into account. *This Recommendation should be brought to the attention of Radiocommunication S
16、tudy Groups 4, 6 and 7. 2 Rec. ITU-R F.1107-2 Annex 1 Information for assessing the interference into digital fixed service systems from emissions of space stations operating in the geostationary orbit 1 Introduction This Annex presents additional information that is necessary for assessing the inte
17、rference into such FS systems employing digital modulation. The methodology provides statistics for both the interference-to-noise ratio (I/N) values of individual stations and the fractional degradation of performance (FDP) values of routes. The methodology employed for assessing the route FDP as d
18、escribed in 3 is only valid when the I/N of a receiver station of that route is not so large as to drive the receiver into a non-linear range. The user is therefore encouraged to assess the I/N per receiver statistics, as described in 2, before assessing the FDP statistics on a multihop basis, as de
19、scribed in 3. This Annex applies to digital FS systems where multipath fading generally predominates and does not apply to those systems where precipitation attenuation generally predominates. 2 Station-by-station analysis In the case of digital point-to-point (P-P) and point-to-multipoint (P-MP) FS
20、 systems, it is appropriate to evaluate interference in terms of FDP as defined for the time varying interference from non-geostationary satellites in Annex 3 to Recommendation ITU-R F.1108. As an analogy, when there is only one FS station, FDPhopdue to interference entries from geostationary satell
21、ites can be defined at the input of a receiver as follows, taking into account that the interference level is almost time-invariant: ThopNIFDP = (1) where: I : aggregate interference (W/MHz) from visible satellites into the FS receiver NT: receiver thermal noise (W/MHz). A methodology proposed in Ap
22、pendix 2 of this Annex may be used for evaluating the I/N statistics. When it is necessary to determine the effect of interference on digital FS receivers employing diversity, a different formula may be more appropriate for evaluating FDPhopas described in Annex 4 to Recommendation ITU-R F.1108. 3 M
23、ulti-hop P-P FS systems For digital FS systems with n hops operating at frequencies where multipath fading generally predominates and acknowledging that, in general, the performance objectives for multi-hop P-P FS systems are specified on a route basis, two probabilistic assessment methods may be em
24、ployed. One Rec. ITU-R F.1107-2 3 is described in 2 and another is to evaluate the FDP for the route defined as the ratio of total interference power to total noise power for one direction of a route as follows: TnkkrouteNnIFDP=1)(2) where Ikis the aggregate interference falling into the k-th receiv
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
本资源只提供5页预览,全部文档请下载后查看!喜欢就下载吧,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ITURF110722011PROBABILISTICANALYSISFORASSESSINGINTERFERENCEINTOTHEFIXEDSERVICEFROMSATELLITESUSINGTHEGEOSTATIONARYORBIT

链接地址:http://www.mydoc123.com/p-790945.html