1、 Recommendation ITU-R F.637-4(03/2012)Radio-frequency channel arrangements for fixed wireless systems operating in the 21.2-23.6 GHz bandF SeriesFixed serviceii Rec. ITU-R F.637-4 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of
2、 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 Re
3、gional 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 su
4、bmission 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-R
5、 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, am
6、ateur 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.637-4 1 RECOMMENDATION ITU-R F.637-4 Radio-frequency channel arrangements for fixed wireless systems operating in the 21.2-23.6 GHz band (Question ITU-R 247/5) (1986-1992-1994-1999-2012) Scope This Recommendation
9、 provides radio-frequency (RF) channel arrangements for fixed wireless systems (FWS) operating in the 21.2-23.6 GHz band. The main text of this Recommendation presents RF channel arrangements based on the homogeneous patterns with channel separations of 2.5 and 3.5 MHz. Annexes 1 to 4 present exampl
10、e arrangements of these homogeneous patterns used in some countries. The ITU Radiocommunication Assembly, considering a) that the band 21.2-23.6 GHz is allocated to the fixed and other services; b) Resolution 525 of the World Administrative Radio Conference for Dealing with Frequency Allocations in
11、Certain Parts of the Spectrum (Malaga-Torremolinos, 1992); c) that the band is used for differing applications by various administrations and that these applications may require different radio-frequency (RF) channel arrangements; d) that several types of service with various capacities may be in si
12、multaneous use in this frequency band; e) that the band allocated to each service or even to each administration may vary from one country to another; f) that the applications in this frequency band may require differing channel bandwidth; g) that a high degree of compatibility between RF channels o
13、f different arrangements can be achieved by selecting all channel centre frequencies from a homogeneous basic pattern, recommends 1 that RF channel arrangements for the band 21.2-23.6 GHz should be based on a homogeneous pattern; 2 that the homogeneous pattern with a preferred 3.5 MHz interval be de
14、fined by the relation: fp= fr+ 3.5 + 3.5 p where: 1 p 685 fr: reference frequency of the homogeneous pattern; 3 that the homogeneous pattern with a preferred 2.5 MHz interval be defined by the relation: fp=fr+ 4 + 2.5 p where: 1 p 959 fr: reference frequency of the homogeneous pattern; 2 Rec. ITU-R
15、F.637-4 4 that the reference frequency of the homogeneous pattern for international connections should be: fr= 21 196 MHz other reference frequencies may be agreed by the administrations concerned; 5 that in each bidirectional link all go channels should be in one half of any band, and all return ch
16、annels in the other; 6 that the channel spacings, XS, the centre gap, YS, and the distance to the lower and upper band limits, Z1S and Z2S, should be agreed by the administrations concerned, dependent on the application and channel capacity envisaged (see Recommendation ITU-R F.746 for definitions o
17、f XS, YS and ZS). NOTE 1 Examples of channel arrangements based on this Recommendation are described in Annexes 1, 2, 3 and 4. NOTE 2 Due regard has to be taken that, in certain countries, a 3.5 MHz homogeneous pattern, interleaved by 1.75 MHz from that referred in 2, is used in conjunction with the
18、 main pattern. Annex 1 RF channel arrangements in the band 21.2-23.6 GHz used in some countries in accordance with recommends 2 The use of the band 21.2-23.6 GHz is based on a homogeneous 3.5 MHz frequency pattern. Various channel spacings are accommodated as shown in Fig. 1 and interleaved patterns
19、 are also used for the various spacings. In some applications, additional channels can be added in the edge and central guardbands using the homogeneous pattern. Rec. ITU-R F.637-4 3 FIGURE 1 Radio-frequency channel arrangements for digital and analogue FWS operating in the 21.2-23.6 GHz band (All f
20、requencies in MHz) F.0637-01312 45678 319317315313e)d)1 2 3 4 5 6 7 8 319317315313314 316 318 320 314 316 318 320142134 16015915815771 2 3 4 160159158157180 80279 1 2 79119318014012622 400112283821 2001234 40393837 1 2 3 412345678910c)b)a)2241 2001 20023 60040393837115.53.525.7527.5Go (return) Retur
21、n (go)HVHVHVHVHV1 2 3 4 5 6 7 8 9 10NOTE 1 The RF channel arrangements of Fig. 1e) are derived by the use of carriers interleaved between those of the homogeneous pattern of recommends 2. 4 Rec. ITU-R F.637-4 Annex 2 Radio-frequency channel arrangements for some CEPT administrations in the band 22.0
22、-23.6 GHz in accordance with recommends 2 1 Frequency bands 22.0-22.6 GHz paired with 23.0-23.6 GHz An example of radio-frequency channel arrangements in the band 22.0-22.6 GHz paired with 23.0-23.6 GHz for carrier spacings of 112 MHz, 56 MHz, 28 MHz, 14 MHz, 7 MHz and 3.5 MHz is derived as follows:
23、 Let f0be the centre frequency of 21 196 MHz; fnbe the centre frequency of a radio-frequency channel in the lower half of the band (MHz); f nbe the centre frequency of a radio-frequency channel in the upper half of the band (MHz); then the frequencies of individual channels are expressed by the foll
24、owing relationships: a) for systems with a carrier spacing of 112 MHz: lower half of the band: fn= f0+ 770 + 112 n MHz upper half of the band: f n= f0+ 1 778 + 112 n MHz where: n = 1, . . . 5 b1) for systems with a carrier spacing of 56 MHz providing 9 channels: lower half of the band: fn= f0+ 826 +
25、 56 n MHz upper half of the band: f n= f0+ 1 834 + 56 n MHz where: n = 1, . . . 9 b2) for systems with a carrier spacing of 56 MHz providing 10 channels: lower half of the band: fn= f0+ 784 + 56 n MHz upper half of the band: f n= f0+ 1 792 + 56 n MHz where: n = 1, . . . 10 c) for systems with a carr
26、ier spacing of 28 MHz: lower half of the band: fn= f0+ 798 + 28 n MHz upper half of the band: f n= f0+ 1 806 + 28 n MHz where: n = 1, . . . 20 Rec. ITU-R F.637-4 5 d) for systems with a carrier spacing of 14 MHz: lower half of the band: fn= f0+ 805 + 14 n MHz upper half of the band: f n= f0+ 1 813 +
27、 14 n MHz where: n = 1, . . . 41 e) for systems with a carrier spacing of 7 MHz: lower half of the band: fn= f0+ 808.5 + 7 n MHz upper half of the band: f n= f0+ 1 816.5 + 7 n MHz where: n = 1, . . . 83 f) for systems with a carrier spacing of 3.5 MHz: lower half of the band: fn= f0+ 805 + 3.5 n MHz
28、 upper half of the band: f n= f0+ 1 813 + 3.5 n MHz where: n = 1, . . . 168. NOTE 1 The radio-frequency channel arrangements of a) to f) above use channel centre frequencies fnand f nselected from the homogeneous pattern of recommends 2. NOTE 2 Figure 2 gives occupied spectrum in the 22.0-23.6 GHz b
29、and. 6 Rec. ITU-R F.637-4 FIGURE 2 Radio-frequency channel arrangement in the band 22.0-22.6 GHz paired with 23.0-23.6 GHz F.0637-0222 GHza)b1)b2)c)d)e)f)5 112 MHz channels9 56 MHz channels10 56 MHz channels20 28 MHz channels41 14 MHz channels83 7 MHz channels168 3.5 MHz channels22.6 GHz 23 GHz1 18
30、MHz22 MHz5 112 MHz channels1 10 MHz30 MHz23.6 GHz1 46 MHz50 MHz9 56 MHz channels1 38 MHz58 MHz1 32 MHz8 MHz10 56 MHz channels1 24 MHz16 MHz 1 32 MHz8 MHz20 28 MHz channels1 24 MHz16 MHz 2 2 1 18 MHz8 MHz110MHz16 MHz 2233 41 14 MHz channels111 MHz8 MHz13 MHz16 MHz 456 4 5683 7 MHz channels9.25 MHz2.7
31、5MHz1.25MHz10.75MHz.168 3.5 MHz channelsNote 1NOTE 1 For the centre-gap channel arrangements, see 2 and 3 of this Annex. Rec. ITU-R F.637-4 7 2 Frequency bands 22.59075-22.75875 paired with 22.84275-23.01075 GHz These bands are portions of the centre-gap of the channel arrangement shown in 1, combin
32、ed with the innermost guardbands of the 3.5 MHz arrangement (see Fig. 3). The preferred radio-frequency channel arrangement for digital point-to-point FWS for carrier spacings of 28 MHz, 14 MHz, 7 MHz and 3.5 MHz should be derived as follows: Let f0be the reference frequency of 21 196 MHz; fnbe the
33、centre frequency of the radio-frequency channel in the lower half of the band (MHz); f nbe the centre frequency of the radio-frequency channel in the upper half of the band (MHz); TX/RX duplex separation = 252 MHz; centre gap = 84 MHz; then the frequencies of individual channels (Note 1) are express
34、ed by the following relationships: a) for systems with a carrier spacing of 28 MHz: lower half of band: fn = (f0+ 1 380.75 + 28 n) MHz upper half of band: f n= (f0+ 1 632.75 + 28 n) MHz where: n = 1, . 6 b) for systems with a carrier spacing of 14 MHz: lower half of band: fn= (f0+ 1 387.75 + 14 n) M
35、Hz upper half of band: f n= (f0+ 1 639.75 + 14 n) MHz where: n = 1, . 12 c) for systems with a carrier spacing of 7 MHz: lower half of band: fn= (f0+ 1 391.25 + 7 n) MHz upper half of band: f n= (f0+ 1 643.25 + 7 n) MHz where: n = 1, . 24 d) for systems with a carrier spacing of 3.5 MHz: lower half
36、of band: fn= (f0+ 1 393 + 3.5 n) MHz upper half of band: f n= (f0+ 1 645 + 3.5 n) MHz where: n = 1, . 48 NOTE 1 The channels are shown as paired; however, administrations may envisage unpaired use of those channels according to the national need (e.g. for ENG/OB-SAP/SAB applications). Some administr
37、ations may also wish to pair some of the channels in the lower half within the 22.6-23.0 GHz band with those in 21.2-21.4 GHz band referred in Annex 4. NOTE 2 Figure 3a gives occupied spectrum in the band 22.59075-22.75875 GHz paired with the 22.84275-23.01075 GHz band. 8 Rec. ITU-R F.637-4 FIGURE 3
38、a Radio-frequency channel arrangement in the band 22.59075-22.75875 GHz paired with 22.84275-23.01075 GHz F.0637-03a168 3.5 MHz (Note 1)16822.59075 GHz16716622.6 GHz400 MHz23.0 GHz 23.01075 GHz168 3.5 MHz (Note 1)1 2 3Duplex separation 252 MHz22.75875 GHz 22.84275 GHz6 28 MHz22.59075 GHz12 14 MHz24
39、7 MHz48 3.5 MHz11121 223241 2 3 46 47 4812 14 MHz24 7 MHz48 3.5 MHz11 121 2 23 241 2 346474823.01075 GHz84 MHz6 28 MHzNote 266NOTE 1 This is the 3.5 MHz channel arrangement according to 1 of this Annex. NOTE 2 For the centre-gap channel arrangement, see 3 of this Annex. 3 Frequency band 22.75875-22.
40、84275 GHz This band is the centre-gap of the channel arrangement in 2 (see Fig. 3a), which may be used for unpaired channels. The preferred radio-frequency channel arrangement for digital and analogue point-to-point FWS for carrier spacings of 28 MHz, 14 MHz, 7 MHz and 3.5 MHz should be derived as f
41、ollows: Let f0be the reference frequency of 22 757 MHz; fnbe the centre frequency (MHz) of a radio-frequency channel; then the frequencies of individual channels are expressed by the following relationships: a) for systems with a carrier spacing of 28 MHz: fn= (f0 12.25 + 28 n) MHz Rec. ITU-R F.637-
42、4 9 where: n = 1, 2, 3 b) for systems with a carrier spacing of 14 MHz: fn= (f0 5.25 + 14 n) MHz where: n = 1, 2, . 6 c) for systems with a carrier spacing of 7 MHz: fn= (f0 1.75 + 7 n) MHz where: n = 1, 2, . 12 d) for systems with a carrier spacing of 3.5 MHz: fn= (f0+ 3.5 n) MHz where: n = 1, 2, .
43、 24 NOTE Figure 3b gives occupied spectrum in the 22.75875-22.84275 GHz band. FIGURE 3b Radio-frequency channel arrangement in the band 22.75875-22.84275 GHz F.0637-03b84 MHz (Note 1)a) 28 MHz channelsb) 14 MHz channels22.75875 GHz 22.84275 GHz3 28 MHz channels1236 14 MHz channels123456112 7 MHz cha
44、nnels2 3 456 78910 11 1224 3.5 MHz channels1 2 322 2423c) 7 MHz channelsd) 3.5 MHz channels10 Rec. ITU-R F.637-4 NOTE 1 This is the centre-gap of the channel arrangement in 2 (see Fig. 3a). Annex 3 Description of the radio-frequency channel arrangements in the band 21.2-23.6 GHz in accordance with r
45、ecommends 3 (North America) In the United States of America, the most widespread use of the 21.2-23.6 GHz band is in the 21.8-22.4 GHz and 23.0-23.6 GHz portions for which a frequency pattern with 50 MHz channels has been adopted. The same pattern is being used in the remainder of the 21.2-23.6 GHz
46、band as usage is spreading. Accordingly, a homogeneous pattern is in use, based on recommends 3 and given by: fn= fr 21 + 50 n where: n = 1, 2, 3, . . . 48 fr(reference frequency) = 21 196 MHz. For two-way operation, the go-return separation is about 1 200 MHz. Typical systems in use include digital
47、 transmission at data rates between about 1.5 and 8 Mbit/s, and a variety of analogue video systems. In Canada, the RF channel arrangements for FWS in the band 21.2-23.6 GHz is shown in Fig. 4. FIGURE 4 Band plan for the band 21.2-23.6 GHz (Canada) F.0637-04A21.2 GHz 21.6 GHz 21.8 GHz 22.4 GHz22.3 G
48、Hz22.8 GHz 23 GHz23.5 GHz23.6 GHzBCA B CThe above channel arrangement contains three paired blocks: Blocks A/A, Blocks B/B, and Blocks C/C. In all three blocks, each paired channel has a frequency separation of 1 200 MHz. The channel widths in each block are as follows: A/A: 50 MHz channels (8 in ea
49、ch block). B/B: Five available channel widths: 10 MHz, 15 MHz, 20 MHz, 40 MHz and 50 MHz. C/C: Three available channel widths: 2.5 MHz, 5 MHz and 7.5 MHz. Rec. ITU-R F.637-4 11 Annex 4 Radio-frequency channel arrangements in the band 21.2-23.6 GHz in accordance with recommends 2 (Germany) Taking into account the fact, that: WARC-92 has allocated the band 21.4
