1、 Recommendation ITU-R F.749-3(03/2012)Radio-frequency arrangements for systems of the fixed service operating in sub-bands in the 36-40.5 GHz bandF SeriesFixed serviceii Rec. ITU-R F.749-3 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economic
2、al 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 performed by Wor
3、ld 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 to be used f
4、or 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 found. Series
5、 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, radiodetermin
6、ation, 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 management SNG Satell
7、ite 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, 2012 ITU 2012 All rights reserved. No part of this publica
8、tion may be reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.749-3 1 RECOMMENDATION ITU-R F.749-3 Radio-frequency arrangements for systems of the fixed service operating in sub-bands in the 36-40.5 GHz band (Question ITU-R 247/5) (1992-1994-2001-2012) Scope This R
9、ecommendation provides specifications for radio-frequency channel arrangements for systems in the fixed service with channel separations ranging from 2.5 to 112 MHz in the bands 36-37 GHz, 37.0-39.5 GHz, 38.6-40 GHz and 39.5-40.5 GHz. One Annex (Annex 2) includes block-based arrangements with bandwi
10、dths of 50 MHz and 60 MHz in the frequency range 38.06 to 40 GHz. The ITU Radiocommunication Assembly, considering a) that the band 36.0-40.5 GHz is allocated to the fixed and mobile services and that the propagation characteristics of this band are ideally suited to short-range digital and analogue
11、 radio system applications; b) that differing applications of various administrations may require different radio-frequency (RF) channel arrangements; c) that the band may also be used for broadband wireless access (BWA) systems in the fixed service; d) that several services with various transmissio
12、n signal characteristics and capacities may be in simultaneous use in this frequency band; e) that lower and upper limits of the bands are not uniform and vary internationally; f) that the applications in this frequency band may require differing channel bandwidths; g) that a high degree of compatib
13、ility between radio-frequency channels of different arrangements can be achieved by selecting channel centre frequencies within a homogeneous basic pattern; h) that the differing digital hierarchies used in various countries or regions may require the use of homogeneous basic patterns with differing
14、 intervals; j) that allocation of frequency blocks to BWA systems allows flexible deployment of various technologies including provisions for intersystem/services operation and overall spectrum efficiency, recommends 1 that the preferred RF channel arrangements for the band 36.0-40.5 GHz should be b
15、ased on homogeneous patterns; 2 that the homogeneous pattern with a preferred 3.5 MHz interval be defined by the relation: fp= fr+ 1 + 3.5 p MHz 2 Rec. ITU-R F.749-3 where: 1 p 1 285 fr:reference frequency of the homogeneous pattern; 3 that the homogeneous pattern with a preferred 2.5 MHz interval b
16、e defined by the relation: fp= fr + 2.5 p MHz where: 1 p 1 799 fr: reference frequency of the homogeneous pattern; 4 that the reference frequency of the homogeneous pattern for international connections should be 36 000 MHz; 5 that all go channels should be in one half of any bidirectional band, and
17、 all return channels 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
18、 definitions of XS, YS and ZS); 7 that allocated blocks should result from aggregation of contiguous channels in accordance with the homogeneous patterns. NOTE 1 Examples of RF channel arrangements based on recommends 2 and 3 are described in Annexes 1 and 2. NOTE 2 Due regard has to be taken that,
19、in certain countries, a 3.5 MHz homogeneous pattern, interleaved by 1.75 MHz from that referred in recommends 2, is used in conjunction with the main pattern. NOTE 3 Examples of BWA system block (sub-band) arrangements are described in Annex 3. Rec. ITU-R F.749-3 3 Annex 1 Radio-frequency channel ar
20、rangements in the band 37.0-39.5 GHz used by some CEPT administrations in accordance with recommends 2 The radio-frequency channel arrangement for carrier spacings of 112 MHz, 56 MHz, 28 MHz, 14 MHz, 7 MHz and 3.5 MHz shall be derived as follows: Let f0be the centre frequency of 38 248 MHz = fr+ 1 +
21、 (642 3.5) MHz; fnbe the centre frequency of a RF channel in the lower half of the band (MHz); f nbe the centre frequency of a RF channel in the upper half of the band (MHz); then the frequencies of individual channels are expressed by the following relationships: a) for systems with a carrier spaci
22、ng of 112 MHz: lower half of band: fn=f0 1 246 + 112 n MHz upper half of band: f n= f0+ 14 + 112 n MHz where: n = 1, 2, 3, . . . 10 b) for systems with a carrier spacing of 56 MHz: lower half of band: fn= f0 1 218 + 56 n MHz upper half of band: f n= f0+ 42 + 56 n MHz where: n = 1, 2, 3, . . . 20 c)
23、for systems with a carrier spacing of 28 MHz: lower half of band: fn= f0 1 204 + 28 n MHz upper half of band: f n= f0+ 56 + 28 n MHz where: n = 1, 2, 3, . . . 40. In addition, where practical, administrations may consider the use of channels with index n = 0 and 41; d) for systems with a carrier spa
24、cing of 14 MHz: lower half of band: fn= f0 1 197 + 14 nMHzupper half of band: f n= f0= 63 + 14 n MHz where: n = 1, 2, 3, . . . 80. In addition, where practical, administrations may consider the use of channels with index n = 2, 1, 0 and 81, 82, 83. 4 Rec. ITU-R F.749-3 e) for systems with a carrier
25、spacing of 7 MHz: lower half of band: fn= f0 1 193.5 + 7 n MHz upper half of band: f n= f0 + 66.5 + 7 n MHz where: n = 1, 2, 3, . . . 160. In addition, where practical, administrations may consider the use of channels with index n = 5, 4, 3, 2, 1, 0 and 161, 162, 163, 164, 165, 166; f) for systems w
26、ith a carrier spacing of 3.5 MHz: lower half of band: fn= f0 1 191.75 + 3.5 n MHz upper half of band: f n= f0+ 68.25 + 3.5 n MHz where: n = 1, 2, 3, . . . 320. In addition, where practical, administrations may consider the use of channels with index n = 11, 10, ., 1, 0 and 321, 322, ., 331, 332. NOT
27、E 1 The RF channel arrangements of a) to e) above use channel centre frequencies fnand f nselected from the homogeneous pattern of recommends 2. The arrangement f) above uses channel centre frequencies spaced by 3.5 MHz but interleaved between the homogeneous pattern of recommends 2, with an offset
28、of 1.75 MHz. Rec. ITU-R F.749-3 5 FIGURE 1 Occupied spectrum: 37.0 GHz-39.5 GHz band F.0749-0158 MHza) 112 MHz channelsGuard band Centre gap Guard band62 MHz58 MHzb) 56 MHz channels20 56 MHz channels62 MHz58 MHzc) 28 MHz channels37.000 GHz37.058 GHz62 MHz58 MHz20 56 MHz channels10 112 MHz channels40
29、 28 MHz channels80 14 MHz channels 80 14 MHz channels160 7 MHz channelsd) 14 MHz channels58 MHz 62 MHz62 MHz140 MHze) 7 MHz channelsf) 3.5 MHz channels58 MHz 140 MHz 62 MHz38.178 GHz 38.318 GHz 39.438 GHz39.500 GHz140 MHz140 MHz10 112 MHz channels40 28 MHz channels160 7 MHz channels320 3.5 MHz chann
30、els 320 3.5 MHz channels140 MHz140 MHzNote1Note1Note1Note1Note2Note2Note2Note2Note2Note2Note2Note2Note2Note2Note2Note2Note 1 One additional 28 MHz channel. Note 2 42 MHz for additional 3.5, 7 and 14 MHz channels. 6 Rec. ITU-R F.749-3 Annex 2 RF channel arrangements for radio-relay systems operating
31、in the 36.0-37.0 GHz and in the 39.5-40.5 GHz bands in accordance with recommends 2 (Russia) The RF channel arrangement for carrier spacings of 112 MHz, 56 MHz, 28 MHz, 14 MHz, 7 MHz and 3.5 MHz shall be derived as follows: Let f0be the centre frequency of 36 498 MHz = fr+ 1 + (142 3.5) MHz for the
32、frequency band 36 000-37 000 MHz, and f0be the centre frequency of 39 998 MHz = fr+ 1 + (1 142 3.5) MHz for the frequency band 39 500-40 500 MHz; fnbe the centre frequency of a RF channel in the lower half of the band (MHz); f nbe the centre frequency of a RF channel in the upper half of the band (M
33、Hz); then the frequencies of individual channels are expressed by the following relationships: a) for systems with a carrier spacing of 112 MHz: lower half of band: fn= f0 532 + 112 n MHz upper half of band: f n= f0 70 + 112 n MHz where: n = 1, 2, 3, 4 b) for systems with a carrier spacing of 56 MHz
34、: lower half of band: fn= f0 476 + 56 n MHz upper half of band: f n= f0 14 + 56 n MHz where: n = 1, 2, . . . 8 c) for systems with a carrier spacing of 28 MHz: lower half of band: fn= f0 448 + 28 n MHz upper half of band: f n= f0+ 14 + 28 n MHz where: n = 1, 2, . . . 15 d) for systems with a carrier
35、 spacing of 14 MHz: lower half of band: fn= f0 434 + 14 n MHz upper half of band: f n= f0+ 28 + 14 n MHz where: n = 1, 2, . . . 29 e) for systems with a carrier spacing of 7 MHz: lower half of band: fn= f0 427 + 7 n MHz upper half of band: f n= f0+ 35 + 7 n MHz where: n = 1, 2, . 57 Rec. ITU-R F.749
36、-3 7 f) for systems with a carrier spacing of 3.5 MHz: lower half of band: fn= f0 423.5 + 3.5 n MHz upper half of band: f n= f0+ 38.5 + 3.5 n MHz where: n = 1, 2, . . . 113. NOTE 1 The centre and edge guardbands may be reduced, by agreement between the administrations concerned, for lower capacity s
37、ystems by the addition of extra channels using frequencies derived from the homogeneous pattern of recommends 2. Annex 3 RF block arrangements in the band 38.6-40.0 GHz using the homogeneous pattern in accordance with recommends 7 1 Arrangement in Canada and the United States of America 1.1 Radio-fr
38、equency block arrangement description In Canada and the United States of America the band 38.6-40.0 GHz is divided into 14 paired frequency blocks (50 MHz + 50 MHz) as follows: Block designation Lower frequency blocks Upper frequency blocks Frequency band limits (MHz) 1 38 600-38 650 39 300-39 350 2
39、 38 650-38 700 39 350-39 400 3 38 700-38 750 39 400-39 450 4 38 750-38 800 39 450-39 500 5 38 800-38 850 39 500-39 550 6 38 850-38 900 39 550-39 600 7 38 900-38 950 39 600-39 650 8 38 950-39 000 39 650-39 700 9 39 000-39 050 39 700-39 750 10 39 050-39 100 39 750-39 800 11 39 100-39 150 39 800-39 850
40、 12 39 150-39 200 39 850-39 900 13 39 200-39 250 39 900-39 950 14 39 250-39 300 39 950-40 000 8 Rec. ITU-R F.749-3 1.2 Usage Block designations are A/A to N/N for Canada, and 1-A/1-B to 14-A/14-B for the United States of America. Frequency blocks are paired to facilitate frequency division duplex sy
41、stems. Preference is given to the lower frequency blocks for downlink operation and to the upper frequency blocks for uplink operation. Time division duplex systems may operate in either the lower or upper frequency blocks. Operators may subdivide the 50 MHz blocks according to their needs. Larger f
42、requency blocks can be made available through the aggregation of 50 MHz paired blocks. 2 Arrangement in Japan 2.1 Radio-frequency block arrangement description In Japan the band 38.06-38.48/39.06-39.48 GHz is divided into seven paired frequency blocks (60 MHz + 60 MHz) as follows: Paired block Lower
43、 frequency block (MHz) Upper frequency block (MHz) C1/C1 38 060-38 120 39 060-39 120 C2/C2 38 120-38 180 39 120-39 180 C3/C3 38 180-38 240 39 180-39 240 C4/C4 38 240-38 300 39 240-39 300 C5/C5 38 300-38 360 39 300-39 360 C6/C6 38 360-38 420 39 360-39 420 C7/C7 38 420-38 480 39 420-39 480 2.2 Usage F
44、requency blocks are paired to facilitate frequency division duplex systems. Preference is given to the lower frequency blocks for uplink operation and to the upper frequency blocks for downlink operation. Time division duplex systems may operate in either the lower or upper frequency blocks. Operators may subdivide the 60 MHz blocks according to their needs. Larger frequency blocks can be made available through the aggregation of 60 MHz paired blocks. _
