ITU-R F 387-12-2012 Radio-frequency channel arrangements for fixed wireless systems operating in the 10 7-11 7 GHz band《工作在10 7-11 7 GHz频段内固定无线系统的射频信道分配》.pdf
《ITU-R F 387-12-2012 Radio-frequency channel arrangements for fixed wireless systems operating in the 10 7-11 7 GHz band《工作在10 7-11 7 GHz频段内固定无线系统的射频信道分配》.pdf》由会员分享,可在线阅读,更多相关《ITU-R F 387-12-2012 Radio-frequency channel arrangements for fixed wireless systems operating in the 10 7-11 7 GHz band《工作在10 7-11 7 GHz频段内固定无线系统的射频信道分配》.pdf(13页珍藏版)》请在麦多课文档分享上搜索。
1、 Recommendation ITU-R F.387-12(03/2012)Radio-frequency channel arrangements for fixed wireless systems operatingin the 10.7-11.7 GHz bandF SeriesFixed serviceii Rec. ITU-R F.387-12 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use o
2、f 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 performed by World and R
3、egional 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 to be used for the s
4、ubmission 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 found. Series of ITU-
5、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, radiodetermination, a
6、mateur 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 management SNG Satellite news
7、 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, 2012 ITU 2012 All rights reserved. No part of this publication may
8、 be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.387-12 1 RECOMMENDATION ITU-R F.387-12 Radio-frequency channel arrangements for fixed wireless systems operating in the 10.7-11.7 GHz band (Question ITU-R 247/5) (1963-1970-1974-1978-1986-1990-1992-1995-1999-200
9、2-2006-2010-2012) Scope This Recommendation provides radio-frequency channel arrangements for fixed wireless systems (FWSs) operating in the 11 GHz band (10.7-11.7 GHz), which may be used for high, medium and low capacity fixed service applications including mobile infrastructure. The channel spacin
10、g recommended in the main text is 40 MHz with 15 and 55 MHz guardbands as well as a second arrangement also using a channel spacing of 40 MHz but with a 35 MHz guardband. Arrangements with channel spacings other than 40 MHz and used in some countries are also provided in the recommends referring to
11、several annexes. The ITU Radiocommunication Assembly, considering a) that, at 11 GHz, digital systems with a capacity of up to 140 Mbit/s or synchronous digital hierarchy or equivalent bit rates seem to be feasible, subject to rainfall conditions; b) that repeater spacing as well as other aspects of
12、 system design in this frequency range must take due cognizance of significant meteorological factors; c) that it is desirable to interconnect such systems at radio frequencies on international links; d) that single- and multi-carrier digital fixed wireless systems (FWSs) are both useful concepts to
13、 achieve the best technical and operational trade-off in system design; e) that when very high-capacity links (e.g. twice Synchronous Transfer Mode-1 (STM-1) are required, further economy may be achieved using system bandwidths wider than the recommended channel separation, associated to highly effi
14、cient modulation formats, recommends 1 that the preferred RF channel arrangements for high capacity FWS with a bit rate of the order of plesiochronous or synchronous digital hierarchy or equivalent bit rates (see Note 1) operating in the 11 GHz band should be derived as follows: Let f0be the frequen
15、cy of the centre of the band of frequencies occupied (MHz), fnbe the centre frequency of one RF channel in the lower half of the band (MHz), nf be the centre frequency of one RF channel in the upper half of the band (MHz); 1.1 that a main pattern (providing up to 12 go and return channels) provides
16、the frequencies of individual channels expressed by the following relationship: lower half of the band: fn= f0 525 + 40 n MHz upper half of the band: nf = f0+ 5 + 40 n MHz where: 2 Rec. ITU-R F.387-12 n = 1, 2, 3, 12 in both the lower and the upper bands (for 12-channel arrangement with ZS1guardband
17、s of 15 MHz), or n = 2, 3, 4, 12 in the lower half of the band, and n = 1, 2, 3, 11 in the upper half of the band (for 11-channel arrangement with ZS1guardbands of 55 MHz). The frequency arrangement is illustrated in Fig. 1 (Note 2); alternated, co-polar and frequency reuse arrangements are possible
18、; 1.2 that a second option for main pattern (providing up to 12 go and return channels) with ZS1guardbands of 35 MHz provides the frequencies of individual channels expressed by the following relationship: lower half of the band: fn= f0 505 + 40 n MHz upper half of the band: nf = f0 15 + 40 n MHz wh
19、ere: n = 1, 2, 3, 12, depending on the number of channels. The frequency arrangement is illustrated in Fig. 2, alternated, co-polar and frequency reuse arrangements are possible; FIGURE 1 RF channel arrangement for high capacity FWSs operating in the 11 GHz band according to recommends 1.1 (All freq
20、uencies (MHz) F.0387-01f0+485+45454851 2 3 4 5 6 7 8 9 10 11 12123456789101129040500 500Channel number1ZS defined as the radio-frequency separation between the centre frequencies of the outermost radio-frequency channels and the edge of the frequency band. Rec. ITU-R F.387-12 3 FIGURE 2 RF channel a
21、rrangement for high capacity FWSs operating in the 11 GHz band according to recommends 1.2 F.0387-02f0+465+25254651 2 3 4 5 6 7 8 9 10 11 12123456789101125040500 500Channel number1.3 that when very high-capacity links (e.g. twice STM-1) are required and network coordination permits, with the agreeme
22、nt of the administrations concerned, the use of any two adjacent 40 MHz channels specified in recommends 1.1 or recommends 1.2 is possible, for wider bandwidth systems, with the centre frequency lying in the central point of the distance between the two 40 MHz adjacent channels; 2 that, in a section
23、 over which the international connection is arranged, all the go channels should be in one half of the band and all the return channels should be in the other half of the band; 3 that for adjacent RF channels in the same half of the band different polarizations should preferably be used alternately
24、(see recommends 6); 4 that the preferred centre frequency f0 is 11 200 MHz; other centre frequencies may be used by agreement between the administrations concerned; 5 that when low or medium-capacity digital FWS are to be used in the 11 GHz band, the RF channel arrangement should be in accordance wi
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