1、 Recommendation ITU-R F.2004(03/2012)Radio-frequency channel arrangementsfor fixed service systems operatingin the 92-95 GHz range F SeriesFixed serviceii Rec. ITU-R F.2004 Foreword The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the ra
2、dio-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 Regional
3、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 submissio
4、n 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 Recomm
5、endations (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, amateur a
6、nd 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 gatheri
7、ng 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 be repr
8、oduced, by any means whatsoever, without written permission of ITU. Rec. ITU-R F.2004 1 RECOMMENDATION ITU-R F.2004 Radio-frequency channel arrangements for fixed service systems operating in the 92-95 GHz range (Question ITU-R 247/5) (2012) Scope This Recommendation describes channel arrangements i
9、n the portions of the frequency range 92.0-95.0 GHz allocated to the fixed service. The arrangements are based on a homogeneous pattern of 50 MHz slots and are proposed for either, frequency division duplex (FDD) or time division duplex (TDD) applications. The ITU Radiocommunication Assembly, consid
10、ering a) that, within the frequency range 92-95 GHz, the bands 92.0-94.0 GHz and 94.1-95 GHz are allocated to the fixed service; b) that the propagation characteristics of the 92.0-95.0 GHz band are ideally suited for use of short-range digital radio links in high-density networks; c) that in the fr
11、equency range a high antenna directivity is achievable even with small-size antennas, increasing the density of equipment and further reducing the risk of interference within the same and other services; d) that differing applications licensed by various administrations may require different radio-f
12、requency channel arrangements; e) that the applications in this frequency band may require differing channel bandwidths; f) that several services with various transmission signal characteristics and capacities may be in simultaneous use in this frequency band; g) that the low end of the frequency ba
13、nd is suitable for the longest-hop radio links because the atmospheric attenuation is less than at the top of the band, recommends 1 that the preferred radio-frequency channel arrangement for the 92.0-95.0 GHz band should be based on homogeneous patterns; 2 that the channel arrangements for time div
14、ision duplex (TDD) systems in the frequency range 92.0-95.0 GHz should be defined as given in Annex 1; 3 that the channel arrangements for frequency division duplex (FDD) systems in the frequency range 92-95.0 GHz should be defined as given in Annex 2. 2 Rec. ITU-R F.2004 Annex 1 Radio-frequency cha
15、nnel arrangements in the band 92.0-95.0 GHz*for systems using TDD Let: fr: be the reference frequency of 92 000 MHz, fn: be the centre frequency of a radio-frequency channel in the band 92-95 GHz, then the centre frequencies of individual channels are expressed by the following relationships: a) for
16、 systems with a channel separation of 100 MHz: fn= fr+ 100 n MHz where: n = 1, 2, , 19, 22, 23, , 29 (Notes 1 and 2) b) for systems with a channel separation of 50 MHz: fn= fr+ 25 + 50 n MHz where: n = 1, 2, , 39, 43, 44, , 58 (Note 1). FIGURE 1 Occupied spectrum: 92 to 95 GHz band (Note 1) F.2004-0
17、1Guard band50 MHz19 100 MHz 8 100 MHz Guard band50 MHzGuard band50 MHzThis bandis notallocatedto FS92.0GHz92.05GHz93.95GHz94.0GHz94.1GHz94.15GHz94.95GHz95.0GHzGuard band50 MHzGuard band50 MHz39 50 MHz 17 50 MHz This bandis notallocatedto FS92.0GHz92.05GHz94.0GHz94.1GHz94.95GHz95.0GHzGuard band50 MHz
18、b) 50 MHz channelsa) 100 MHz channelsNote 1Note 2 Figure 1 gives occupied spectrum in the 92.0-95.0 GHz for the systems using TDD. Channels with n = 20 and 21 of the 100 MHz arrangement and N = 40 and 41 of the 50 MHz arrangement are not to be used. Channel arrangements with a carrier spacing of 200
19、, 300, , MHz are possible by channel concaten ation.*The band 94-94.1 GHz is not allocated to the fixed service in the Radio Regulations. Rec. ITU-R F.2004 3 Annex 2 Radio-frequency channel arrangement in the band 92.0-95.0 GHz*for systems using FDD The radio-frequency channel arrangement for channe
20、l separations of 100 MHz and 50 MHz shall be derived as follows: Let fr: be the reference frequency of 92 000 MHz, fn: be the centre frequency (MHz) of the radio-frequency channel in the lower half of the band, fn: be the centre frequency (MHz) of the radio-frequency channel in the upper half of the
21、 band, TX/RX separation = 1 500 MHz, band separation = 100 MHz, then the frequencies (MHz) of individual channels are expressed by the following relationships: a) for systems with a channel separation of 100 MHz: lower half of the band: fn= fr+ 100 n upper half of the band: fn= fr+ 1 500 + 100 n whe
22、re n = 1, 2, 3, 4, 7, 8, , 14 (Notes 1 and 2) b) for systems with a channel separation of 50 MHz: lower half of the band: fn= fr+ 25 + 50 n upper half of the band: fn= fr+ 1 525 + 50 n where n = 1, 2, 3, , 9, 12, 13, , 28 (Note 1). *The band 94-94.1 GHz is not allocated to the fixed service in the R
23、adio Regulations. 4 Rec. ITU-R F.2004 FIGURE 2 Occupied spectrum: 92.0 to 95.0 GHz band (Note 1) F.2004-02Guard band50 MHz8 100 MHz 8 100 MHz Guard band50 MHzGuard band50 MHzThis bandis notallocatedto FS92.0GHz92.05GHz93.95GHz94.0GHz94.1GHz94.15GHz94.95GHz95.0GHzGuard band50 MHzGuard band50 MHz17 50
24、 MHz 17 50 MHz This bandis notallocatedto FS92.0GHz92.05GHz94.0GHz94.1GHz94.95GHz95.0GHzGuard band50 MHzb) 50 MHz channelsa) 100 MHz channelsNote 1nNote 2 Figure 2 gives occupied spectrum in the 92.0-95.0 GHz for the systems using FDD. Channels with n = 5 and 6 of the 100 MHz arrangement and with =
25、10 and 11 of the 50 MHz arrangement are not to be used. Unpai red frequency bands 92.45-92.65 GHz of the 100 MHz arrangement and 92.5-92.6 GHz of the 50 MHz arrangement, can b e used for systems using TDD. Channel arrangements with a carrier spacing of 200, 300, , MHz are possible by channel concaten ation.92.45GHz92.65GHz93.45GHz93.55GHz4 100 MHz Centre gap100 MHz4 100 MHz This bandcan beused for TDDsystemsThis bandcan beused for TDDsystemsCentre gap100 MHz9 50 MHz 92.5GHz92.6GHz93.45GHz93.55GHz9 50 MHz _
