1、 Recommendation ITU-R F.1520-3(04/2011)Radio-frequency arrangements for systems in the fixed service operatingin the band 31.8-33.4 GHzF SeriesFixed serviceii Rec. ITU-R F.1520-3 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 Reg
3、ional 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 sub
4、mission 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, ama
6、teur 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 g
7、athering 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, 2011 ITU 2011 All rights reserved. No part of this publication may b
8、e reproduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.1520-3 1 RECOMMENDATION ITU-R F.1520-3 Radio-frequency arrangements for systems in the fixed service operating in the band 31.8-33.4 GHz (Questions ITU-R 247/5) (2001-2002-2003-2011) Scope This Recommendation spec
9、ifies radio-frequency channel arrangements for fixed service systems with channel separation of 3.5, 7, 14, 28, 56 and 112 MHz (including 56 MHz block arrangements) in the band 31.8-33.4 GHz which has been identified for use for high density applications in the fixed service (HDFS). The ITU Radiocom
10、munication Assembly, considering a) that the band 31.8-33.4 GHz is allocated, among others, to the fixed service (FS) on a primary basis; b) that the 31.8-33.4 GHz band is available for high-density applications in the FS; c) that sharing in the 31.8-33.4 GHz band with radionavigation service (RNS),
11、 space research service (deep space, space-to-Earth) and inter-satellite service is considered to be feasible; d) that harmonized RF arrangements can facilitate effective use of the spectrum; e) that several systems with various transmission signal characteristics and capacities may be in simultaneo
12、us use in this frequency band; f) that certain frequency block arrangements can be achieved by aggregating the frequency channels given in Annex 1; g) that it may sometimes be desirable to interleave additional RF channels between those of the main pattern; h) that a high degree of compatibility bet
13、ween FS systems of different frequency arrangements can be achieved by selecting channel centre frequencies within a homogeneous basic pattern; j) that each region or country will have specific needs in how to use the band; k) that different block sizes may be required to suit various applications,
14、recognizing a) that some applications in this frequency band may require differing architectures (point-to-point and multipoint systems), channel bandwidths, and systems characteristics including the accommodation of symmetrical and asymmetrical traffic; and may require the use of frequency block-ba
15、sed arrangements that may or may not align with the channel arrangement in Annex 1; b) that, in accordance with the Radio Regulations (RR), administrations should take practical measures to minimize the potential interference between stations in the FS and airborne stations in the RNS in the 31.8-33
16、.4 GHz band, taking into account the operational needs of the airborne radar systems, 2 Rec. ITU-R F.1520-3 noting a) that Recommendation ITU-R F.1571 recommends that the airborne stations in the RNS are encouraged to use the centre gap in the radio-frequency (RF) arrangements for the FS in order to
17、 facilitate the compatibility between stations in the FS and RNS, in particular in the vicinity of urban areas, recommends 1 that administrations should consider the RF channel arrangement given in Annex 1 for FS systems deployment in the 31.8-33.4 GHz frequency band; 2 that when additional RF chann
18、els interleaved between those of the main pattern, as described in Annex 1, are required, the values of the centre frequencies of these RF channels should be below those of the corresponding main channel frequencies by a value of half the considered channel spacing; 3 that those administrations wish
19、ing to implement FS systems in this band using a block-based frequency arrangement should consider the guidance given in Recommendation ITU-R F.1519; 4 that administrations wishing to implement block based arrangements, based on block-size increments of 56 MHz, should consider the arrangement in Ann
20、ex 2; 5 that administrations are encouraged to avoid, where practicable, the use of the centre gap of the RF arrangements in order to facilitate the compatibility between stations in the FS and RNS, in particular in the vicinity of urban areas (see Note 1). NOTE 1 The centre gap to be avoided is at
21、least 56 MHz as given in Annex 1. Annex 1 Radio-frequency channel arrangement in the band 31.8-33.4 GHz The RF channels for separations of 3.5 MHz, 7 MHz, 14 MHz, 28 MHz, 56 MHz and 112 MHz shall be derived as follows: let frbe the reference frequency of 32 599 MHz, fnbe the centre frequency (MHz) o
22、f the RF channel in the lower half of the band, nf be the centre frequency (MHz) of the RF channel in the upper half of the band, frequency duplex spacing = 812 MHz, then the frequencies (MHz) of individual channels are expressed by the following relationships: a) for channel separation of 112 MHz:
23、lower half of the band: nf = fr 784 + 112 n upper half of the band: nf = fr+ 28 + 112 n Rec. ITU-R F.1520-3 3 where: n = 1, 2, 3, 6 b) for channel separation of 56 MHz: lower half of the band: nf = fr 756 + 56 n upper half of the band: nf = fr+ 56 + 56 n where: n = 1, 2, 3, 12 c) for a channel separ
24、ation of 28 MHz: lower half of the band: nf = fr 798 + 28 n upper half of the band: nf = fr+ 14 + 28 n where: n = 1, 2, 3, 27 d) for a channel separation of 14 MHz: lower half of the band: nf = fr 791 + 14 n upper half of the band: nf = fr+ 21 + 14 n where: n = 1, 2, 3, 54 e) for a channel separatio
25、n of 7 MHz: lower half of the band: nf = fr 787.5 + 7 n upper half of the band: nf = fr+ 24.5 + 7 n where: n = 1, 2, 3, 108 f) for a channel separation of 3.5 MHz: lower half of the band: nf = fr 785.75 + 3.5 n upper half of the band: nf = fr+ 26.25 + 3.5 n where: n = 1, 2, 3, 216. NOTE 1 Systems us
26、ing time division duplex (TDD) techniques can also operate in the above-defined sub-bands. Centre gap = 56 MHz for the 3.5, 7, 14 and 28 MHz channel separation, 140 MHz for the 56 MHz and 112 MHz channel separation. 4 Rec. ITU-R F.1520-3 TABLE 1 Calculated parameters according to Recommendation ITU-
27、R F.746 XS (MHz) n f1(MHz) fn(MHz) 1f (MHz) nf (MHz) ZS1(MHz) ZS2(MHz) YS (MHz) DS (MHz) 112 1, , 6 31 927 32 487 32 739 33 299 127 101 252 812 56 1, ., 12 31 899 32 515 32 711 33 327 99 73 196 812 28 1, ., 27 31 829 32 557 32 641 33 369 29 31 84 812 14 1, ., 54 31 822 32 564 32 634 33 376 22 24 70
28、812 7 1, ., 108 31 818.5 32 567.5 32 630.5 33 379.5 18.5 20.5 63 812 3.5 1, ., 216 31 816.75 32 569.25 32 628.75 33 381.25 16.75 18.75 59.5 812 XS: separation between centre frequencies of adjacent channels. YS: separation between centre frequencies of the closest go and return channels. ZS1: separa
29、tion between the lower band edge and the centre frequency of the lowest channel in the lower sub-band. ZS2: separation between centre frequency of the highest channel in the upper sub-band and the upper band edge. DS: duplex spacing ).(nnff Rec. ITU-R F.1520-3 5 FIGURE 1 Occupied spectrum: 31.8 to 3
30、3.4 GHz 56 MHz 56 MHz 56 MHz 140 MHz 140 MHz 45 MHz 45 MHz 17 MHz 17 MHz 17 MHz 12 x 56 MHz channels6 x 112 MHz channels27 x 28 MHz channels54 x 14 MHz channels108 x 7 MHz channels216 x 3.5 MHz channels 17 MHz b) 56 MHz channels71 MHz15 MHzc) 28 MHz channelsd) 14 MHz channels15 MHze) 7 MHz channels1
31、5 MHzf) 3.5 MHz channels15 MHz31.815 GHz 32.571 GHz 32.627 GHz 33.383 GHz33.400 GHzGuardband Centre gap Guardband12 x 56 MHz channels31.800 GHz27 x 28 MHz channels54 x 14 MHz channels108 x 7 MHz channels216 x 3.5 MHz channels 56 MHz a) 112 MHz channels6 x 112 MHz channels71 MHz31.871 GHz 33.355 GHz3
32、2.683 GHz32.543 GHzAnnex 2 Radio-frequency block arrangement in the band 31.8-33.4 GHz using block size increments of 56 MHz This Annex provides an example RF block arrangement for the band 31.8-33.4 GHz using block size increments of 56 MHz. Guidance is provided on a flexible approach to specifying
33、 portions of the band for RF channel assigned point-to-point systems and RF block allocated systems. 6 Rec. ITU-R F.1520-3 For frequency division duplex (FDD) the band is divided into twelve (56 + 56) MHz symmetrically paired frequency blocks as follows: TABLE 2 Paired block Lower frequency sub-band
34、 block (MHz) Upper frequency sub-band block (MHz) A/A B/B C/C D/D E/E F/F G/G H/H I/I K/K L/L M/M 31 871-31 927 31 927-31 983 31 983-32 039 32 039-32 095 32 095-32 151 32 151-32 207 32 207-32 263 32 263-32 319 32 319-32 375 32 375-32 431 32 431-32 487 32 487-32 543 32 683-32 739 32 739-32 795 32 795
35、-32 851 32 851-32 907 32 907-32 963 32 963-33 019 33 019-33 075 33 075-33 131 33 131-33 187 33 187-33 243 33 243-33 299 33 299-33 355 Different RF block arrangements can be achieved by aggregating the frequency blocks specified in Table 2. As an example, the band may contain several aggregated block
36、s, arranged in a way shown in Table 3. TABLE 3 Paired block Lower frequency block (MHz) Upper frequency block (MHz) 1 (2 112 MHz block) 2 (2 112 MHz block) 3 (2 112 MHz block) 4 (2 56 MHz block) 5 (2 56 MHz block) 6 (2 56 MHz block) 7 (2 168 MHz block) 31 871-31 983 31 983-32 095 32 095-32 207 32 20
37、7-32 263 32 263-32 319 32 319-32 375 32 375-32 543 32 683-32 795 32 795-32 907 32 907-33 019 33 019-33 075 33 075-33 131 33 131-33 187 33 187-33 355 Rec. ITU-R F.1520-3 7 The 56 MHz block arrangement and possible aggregation are shown below in Figs 2 and 3, respectively. FIGURE 2 71 MHz 140 MHz 45 M
38、Hz12 56 MHz blocks 56 MHz blocks12 Guardband Centre gap GuardbandFIGURE 3 71 MHz 140 MHz 45 MHz3 112 MHz Guardband Centre gap Guardband168 MHz 3 56 MHz 168 MHz3 56 MHz 3 112 MHz For FDD systems, the blocks located in the lower part of each sub-band should be used preferably with the upper sub-band for uplink transmissions, and lower sub-band for downlink transmissions. Systems using TDD can also operate in the above-defined sub-bands. Arrangements stated in Figs 2 and 3 do not preclude the use of other blocks or block pairs.
