ITU-R SM 1541-6-2015 Unwanted emissions in the out-of-band domain《带外部分的无用发射》.pdf
《ITU-R SM 1541-6-2015 Unwanted emissions in the out-of-band domain《带外部分的无用发射》.pdf》由会员分享,可在线阅读,更多相关《ITU-R SM 1541-6-2015 Unwanted emissions in the out-of-band domain《带外部分的无用发射》.pdf(78页珍藏版)》请在麦多课文档分享上搜索。
1、 Recommendation ITU-R SM.1541-6 (08/2015) Unwanted emissions in the out-of-band domain SM Series Spectrum management ii Rec. ITU-R SM.1541-6 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all ra
2、diocommunication 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 performed by World and Regional Radiocommunication Conferences a
3、nd 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 to be used for the submission of patent statements and licen
4、sing 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 found. Series of ITU-R Recommendations (Also available online
5、 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, radiodetermination, amateur and related satellite services P
6、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 management SNG Satellite news gathering TF Time signals and frequency
7、 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, 2015 ITU 2015 All rights reserved. No part of this publication may be reproduced, by any means whatsoever,
8、 without written permission of ITU. Rec. ITU-R SM.1541-6 1 RECOMMENDATION ITU-R SM.1541-6* Unwanted emissions in the out-of-band domain* (2001-2002-2006-01/2011-09/2011-2013-2015) Scope This Recommendation provides out-of-band (OoB) domain emission limits for transmitters in the frequency range of 9
9、 kHz to 300 GHz. The ITU Radiocommunication Assembly, considering a) that Recommendation ITU-R SM.329 Unwanted emissions in the spurious domain, relates to the effects, measurements and limits to be applied to unwanted emissions in the spurious domain; b) that Recommendations ITU-R SM.329 and ITU-R
10、SM.1539 provide guidance for determining the boundary between the out-of-band (OoB) and spurious domains in a transmitted radio frequency spectrum; c) that considerations of OoB domain and necessary bandwidths are included by necessity in Recommendation ITU-R SM.328 Spectra and bandwidth of emission
11、s; d) that unwanted emissions occur after a transmitter is brought into operation and can be reduced by system design; e) that OoB domain emission limits have been successfully used as national or regional regulations in areas having a high radiocommunications density; such limits are generally desi
12、gned according to specific and detailed local needs for coexistence with other systems; f) that nevertheless there is a need, for each service, for a limited number of a more broadly generic ITU-R OoB domain emission limits, generally based on an envelope of the least restrictive OoB domain emission
13、 limits described in the above considering e); g) that where frequency assignments are provided to the Radiocommunication Bureau (BR) in accordance with Appendix 4 of the Radio Regulations (RR), the necessary bandwidth of an emission with a single carrier is given by the bandwidth portion of the emi
14、ssion designator; h) that the necessary bandwidth, referred to in RR Appendix 4 is for a single carrier transmission, and may not adequately cover the case of systems with multiple carriers, recognizing that the following terms are defined in the RR. * This Recommendation should be brought to the at
15、tention of Radiocommunication Study Groups 4, 5, 6 and 7. * Although OoB emissions are generally predominant in the OoB domain, spurious emissions may also occur in the OoB domain. It is important to note that the limits in this Recommendation apply to all the unwanted emissions in the OoB domain, b
16、oth OoB emissions and spurious emissions. 2 Rec. ITU-R SM.1541-6 Unwanted emissions 1.146 unwanted emissions*: Consist of spurious emissions and out-of-band emissions. Spurious emission 1.145 spurious emission*: Emission on a frequency or frequencies which are outside the necessary bandwidth and the
17、 level of which may be reduced without affecting the corresponding transmission of information. Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products, but exclude out-of-band emissions. Out-of-band emission 1.144 out-of-band em
18、ission*: Emission on a frequency or frequencies immediately outside the necessary bandwidth which results from the modulation process, but excluding spurious emissions. Occupied bandwidth 1.153 occupied bandwidth: The width of a frequency band such that, below the lower and above the upper frequency
19、 limits, the mean powers emitted are each equal to a specified percentage /2 of the total mean power of a given emission. Unless otherwise specified in an ITU-R Recommendation for the appropriate class of emission, the value of /2 should be taken as 0.5%. Necessary bandwidth 1.152 necessary bandwidt
20、h: For a given class of emission, the width of the frequency band which is just sufficient to ensure the transmission of information at the rate and with the quality required under specified conditions. Assigned frequency band 1.147 assigned frequency band: The frequency band within which the emissi
21、on of a station is authorized; the width of the band equals the necessary bandwidth plus twice the absolute value of the frequency tolerance. Where space stations are concerned, the assigned frequency band includes twice the maximum Doppler shift that may occur in relation to any point of the Earths
22、 surface. Assigned frequency 1.148 assigned frequency: The centre of the frequency band assigned to a station. noting a) that Recommendation ITU-R SM.1540 additionally covers cases of unwanted emissions in the OoB domain falling into adjacent allocated bands; b) that the studies required by Question
23、 ITU-R 222/1, approved by Radiocommunication Assembly 2000, could have formal and substantial impact to basic definitions used in this Recommendation. It may be necessary to revise this Recommendation in the future to reflect the results of these studies, Rec. ITU-R SM.1541-6 3 recommends 1 Terminol
24、ogy and definitions that the following additional terms and definitions should be used: 1.1 Spurious domain1 (of an emission): the frequency range beyond the OoB domain in which spurious emissions generally predominate. 1.2 OoB domain1 (of an emission): the frequency range, immediately outside the n
- 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。
下载文档到电脑,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:
- ITURSM154162015UNWANTEDEMISSIONSINTHEOUTOFBANDDOMAIN 外部 无用 发射 PDF

链接地址:http://www.mydoc123.com/p-794040.html