1、 Recommendation ITU-R F.747-1(03/2012)Radio-frequency channel arrangements for fixed wireless system operating in the 10.0-10.68 GHz bandF SeriesFixed serviceii Rec. ITU-R F.747-1 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.747-1 1 RECOMMENDATION ITU-R F.747-1 Radio-frequency channel arrangements for fixed wireless system operating in the 10.0-10.68 GHz band (Question 247/5) (1992-2012) Scope This Recommendation provides radio-frequ
9、ency channel arrangements for fixed wireless systems operating in the 10.0-10.68 GHz band or within its sub-bands. The channel arrangements specified in Annexes 1 to 4 are based on frequency separations of 3.5, 7, 14 or 28 MHz (derived from a 3.5 MHz homogeneous pattern), or frequency separations of
10、 2.5 or 5 MHz (derived from a 1.25 MHz homogeneous pattern). The ITU Radiocommunication Assembly, considering a) that the 10.0 to 10.68 GHz frequency range is allocated, directly in the Table of Frequency Allocations or through footnotes, to the fixed and mobile services; b) that this band is advant
11、ageous for various digital fixed wireless system applications using point-to-point or point-to-multipoint systems; c) that such systems are already in extensive use and are expected to be used more extensively in the future; d) that differing applications for various administrations may require diff
12、erent frequency plans; e) that several applications with various transmission signal characteristics and capacities may be in simultaneous use in this frequency band; f) that the specific band assigned to each application by each administration may vary from one country to another; g) that the appli
13、cations in this frequency band may require different channel bandwidths; h) that a high degree of compatibility between radio-frequency channels of different arrangements can be achieved by selecting all channel centre frequencies from a homogeneous basic pattern; j) that the differing digital hiera
14、rchies used in various countries or regions may require the use of homogeneous basic patterns with different intervals; k) that when very high capacity links (e.g. twice Synchronous transfer mode 1 (STM-1) are required, further benefits may be obtained using system bandwidths wider than the recommen
15、ded channel separation, associated to highly efficient modulation formats; l) that Recommendation ITU-R F.1568 provides guidance on frequency block arrangements for fixed wireless access systems in the band 10.15 to 10.3 GHz paired with 10.5 to 10.65 GHz; m) that administrations may choose to alloca
16、te certain parts of the bands to one-way links, for example electronic news gathering/outside broadcast (ENG/OB) links within the tuning range 10.0-10.68 GHz, in agreement to the recommended radio-frequency channel arrangements, 2 Rec. ITU-R F.747-1 recommends 1 that frequency plans for the 10.0 to
17、10.68 GHz band should be based on homogeneous patterns; 2 that the homogeneous pattern, for the 10.5 to 10.68 GHz band, with a preferred 3.5 MHz interval be defined by the relation: fn= fr 1 200.5 + 3.5 n MHz where the reference frequency of the homogeneous pattern is: fr= 11 701 MHz and the number
18、of radio-frequency pattern slots is: 1 n 50 (see Annex 1); 3 that the homogeneous pattern, for the 10.55 to 10.68 GHz band, with a preferred 1.25 MHz interval be defined by the relation: fn= fr 1 151 + 1.25 n MHz where the reference frequency of the homogeneous pattern is: fr= 11 701 MHz and the num
19、ber of radio-frequency pattern intervals is: 1 n 103 (see Annex 2); 4 that the homogeneous pattern, for the whole 10.0 to 10.68 GHz band, with a preferred 3.5 MHz interval, be defined by the relation: fn= fr 1701 + 3.5 n MHz where the reference frequency of the homogeneous pattern is: fr= 11 701 MHz
20、 and the number of radio-frequency pattern intervals is: 1 n 194 (see Annexes 3 and 4); 5 that the channel spacings, the centre gap, and the distance to the lower and upper band limits, the reference frequency, as well as any further subdivision or combination of radio-frequency channels should be a
21、greed by the administrations concerned, dependent on the application and channel capacity envisaged; 6 that when very high capacity links (e.g. twice STM-1) are required and network coordination permits, with the agreement of the administrations concerned, the use of any two adjacent 28 MHz channels
22、, eventually provided by a specific channel arrangement derived from recommends 4, is possible for wider bandwidth systems with centre frequency lying in the central point of the distance between the two 28 MHz adjacent channels. Rec. ITU-R F.747-1 3 Annex 1 Description of a radio-frequency channel
23、arrangement in the band 10.5 to 10.68 GHz using the homogeneous pattern described in recommends 2 The channel arrangement is as follows: lower half of the band: fn= fr 1 204 + 7 m MHz upper half of the band: nf = fr 1 113 + 7 m MHz The 12 values of m from 1 to 12 will provide the twelve channel freq
24、uencies of each half-band. The reference frequency fris: fr= 11 701 MHz This arrangement is illustrated in Fig. 1. FIGURE 1 Radio-frequency channel arrangement in the frequency band 10.5 to 10.68 GHz F.0747-0110.5 GHzf1f6f74 MHz 7 MHz 14 MHz 8 MHz10.68 GHzf12f 1f 12Annex 2 Description of a radio-fre
25、quency channel arrangement in the band 10.55 to 10.68 GHz using the homogeneous pattern described in recommends 3 The channel arrangement assigns separate frequency band portions to point-to-point and to point-to-multipoint transmission, respectively, as shown in Fig. 2. Two different channel bandwi
26、dths are available for each of the two services: 1.25 and 2.5 MHz for the point-to-point service, 2.5 and 5.0 MHz for the digital electronic message service (DEMS). Each assigned radio-frequency channel may be subdivided as desired for greater usage versatility and higher spectral efficiency. 4 Rec.
27、 ITU-R F.747-1 FIGURE 2 Radio-frequency channel arrangement for the 10.55 to 10.68 GHz band (All frequencies are in MHz) F.0747-02Four5 MHzchannels10 68010 65010 63010 61510 58510 56510 55010 62510 560Twelve2.5 MHz channelsTwelve2.5 MHz channelsFour5 MHzchannelsFour2.5 MHzchannelsFour1.25MHzchannels
28、Four1.25MHzchannelsFour2.5 MHzchannelsUser transmissionNodal transmissionPoint-to-pointreturn (Go)Point-to-pointreturn(Go) Annex 3 Description of a radio-frequency channel arrangement in the band 10.15 to 10.3 GHz paired with 10.5 to 10.65 GHz using the homogeneous pattern described in recommends 4
29、When specific channel arrangements are required, the frequencies of individual channels are expressed by the following relationships: Let f0be the reference frequency of the pattern = 11 701 MHz; fnbe the centre frequency (MHz) of a radio-frequency channel in the lower half of the band; fnbe the cen
30、tre frequency (MHz) of a radio-frequency channel in the upper half of the band. a) For systems with a carrier spacing of 28 MHz (Note 1): lower half of band: fn= (f0 1 561 + 28n) MHz; upper half of band: fn= (f0 1 211 + 28n) MHz; where n = 1, 2 . 5. b) For systems with a carrier spacing of 14 MHz: l
31、ower half of band: fn= (f0 1 554 + 14n) MHz; upper half of band: fn= (f0 1 204 + 14n) MHz; where n = 1, 2 . 10. Rec. ITU-R F.747-1 5 c) For systems with a carrier spacing of 7 MHz: lower half of band: fn= (f0 1 550.5 + 7n) MHz; upper half of band: fn= (f0 1 200.5 + 7n) MHz; where n = 1, 2 . 20. d) F
32、or systems with a carrier spacing of 3.5 MHz: lower half of band: fn= (f0 1 552.25 + 3.5n) MHz; upper half of band: fn= (f0 1 202.25 + 3.5n) MHz; where n = 1, 2 . 42. Figure 3a) shows the relevant band occupancy. When frequency block assignment is desired, the blocks can be more flexibly built up by
33、 aggregation of 0.5 MHz basic slots of the whole bands shown in Fig. 3b). NOTE 1 The 28 MHz channels of this arrangement are coincident with the 28 MHz blocks referred to in Recommendation ITU-R F.1568. NOTE 2 The channel arrangement in this Annex is also used as basic paired arrangement in Annex 4.
34、 6 Rec. ITU-R F.747-1 FIGURE 3 Frequency occupancy 10.15 to 10.3 GHz paired with 10.5 to 10.65 GHz F.0747-03Guard band4 MHzCentre gap210 MHzGuard band6 MHz5 28 MHz channels 5 28 MHz channels10 294 MHz 10 650 MHz10 150 MHz 10 504 MHzGuard band4 MHzCentre gap210 MHzGuard band6 MHz10 14 MHz channels 10
35、 14 MHz channels10 150 MHz 10 294 MHz 10 504 MHz 10 650 MHzGuard band4 MHzCentre gap210 MHzGuard band6 MHz10 150 MHz 10 294 MHz 10 504 MHz 10 650 MHz20 7 MHz channels 20 7 MHz channelsGuard band0.5 MHzCentre gap203 MHzGuard band2.5 MHz42 3.5 MHz channels 42 3.5 MHz channels10 150 MHz 10 297.5 MHz 10
36、 500.5 MHz 10 650 MHz300 0.5 MHz channel slots 300 0.5 MHz channel slotsa) 3.5/7/14/28 MHz channel arrangements based on 3.5 MHz patternb) 0.5 MHz slots for building up frequency blocks assignmentsCentre gap200 MHz10 150 MHz 10 300 MHz 10 500 MHz 10 650 MHzRec. ITU-R F.747-1 7 Annex 4 Description of
37、 a radio-frequency channel arrangement in the band 10.0 to 10.68 GHz for paired and unpaired channels using the homogeneous pattern described in recommends 4 In Italy, this frequency band is used, with radio channels of different width, for the transmission of digital TV signals with different codin
38、g formats. The channel arrangement offers the paired (go/return) channels, in the band 10.15-10.3 GHz paired with 10.5-10.65 GHz band, equal to those described in Annex 3, as well as other channels, for paired or unpaired use, obtained by contiguous extension of 3.5, 7, 14 and 28 MHz channels in the
39、 lower portion of the band 10.0-10.15 GHz, in the upper portion 10.65-10.68 GHz and in the centre gap 10.3-10.5 GHz. The arrangement is shown in Fig. 4. FIGURE 4 Frequency occupancy 10.0 to 10.68 GHz F.0747-045 x 28 MHz 7 x 28 MHz (Note) 1x28 MHz10 x 14 MHz 15 x 14 MHz 2x14 MHz21 x 7 MHz 30 x 7 MHz
40、5x7 MHz58 x 3.5 MHz 9x3.5 MHz3.5 MHz10 154 MHz 10 294 MHz 10 504 MHz 10 644 MHz1 MHz42 x 3.5 MHzPaired channelssee Annex 3Paired channelssee Annex 3Paired channelsPaired channelssee Annex 3Paired channelssee Annex 3Paired channelssee Annex 3Paired channelssee Annex 3Paired channelssee Annex 3Guard band14 MHz14 MHz 8 MHz7 MHz 1 MHzGuard band10 000 MHz 10 150.5 MHz 10 297.5 MHz 10 500.5 MHz 10 647.5 MHz 10 680 MHz8 MHzNOTE With an inner 14 MHz slot free. _
