1、Rec. ITU-R F.1098-1 1RECOMMENDATION ITU-R F.1098-1RADIO-FREQUENCY CHANNEL ARRANGEMENTS FOR RADIO-RELAYSYSTEMS IN THE 1 900-2 300 MHz BAND(Question ITU-R 136/9)(1994-1995)Rec. ITU-R F.1098-1The ITU Radiocommunication Assembly,consideringa) that as a result of the World Administrative Radio Conference
2、 for Dealing with Frequency Allocations inCertain Parts of the Spectrum (Malaga-Torremolinos, 1992) (WARC-92) the fixed service is required to share theband 1 900-2 300 MHz more extensively with new services on a co-primary basis;b) that fixed services have shared the 2 025-2 110 MHz and 2 200-2 290
3、 MHz bands satisfactorily with the spaceoperation, space research, and Earth-exploration satellite services under the current provisions of Articles 27 and 28 ofthe Radio Regulations;c) that use of the spectrum outside 2 025-2 110 MHz and 2 200-2 290 MHz by fixed service may be possiblesubject to sh
4、aring conditions with the mobile-satellite service (MSS) and future public land mobile telecommunicationsystems (FPLMTS), such as by using adequate geographical and/or frequency separation;d) that Resolution No. 113 of WARC-92 recognized that there are technical and economic factors that willrequire
5、 continued operation of fixed systems in the range 1-3 GHz;e) that the channel plans presented in Recommendations ITU-R F.283 and ITU-R F.382 are not optimallyarranged to accommodate the new allocations between 1 900 and 2 300 MHz;f) that administrations may have different requirements for sharing s
6、pectrum with the fixed service, and they maynot require all the spectrum allocated to MSS or designated for FPLMTS;g) that applications in this band will require different channel bandwidths;h) that a high degree of compatibility between different systems and between radio-frequency channels ofdiffe
7、rent arrangements can be achieved by selecting channel centre frequencies within a homogeneous basic pattern;j) that efficiencies can be realized by minimizing the number of basic patterns,recommends1 that where the introduction of FPLMTS and/or MSS is not compatible with the existing radio-frequenc
8、ychannel arrangements in the 1 900-2 300 MHz band, the new radio-frequency channel arrangements be based on utilizingthe bands 2 025-2 110 MHz and 2 200-2 290 MHz;2 that the preferred new radio-frequency channel arrangements for the 1 900-2 300 MHz band should be basedon homogeneous patterns;3 that
9、the homogeneous pattern (fp) with a preferred 3.5 MHz interval be defined by the relation:fp= fr+ 3.5 pwhere: 0 p 113fr: reference frequency of the homogeneous pattern = 1 903 MHz;4 that the homogeneous pattern (fp) with a preferred 2.5 MHz interval be defined by the relation:fp= fr+ 2.5 pwhere: 0 p
10、 160fr : reference frequency of the homogeneous pattern = 1 900 MHz;2 Rec. ITU-R F.1098-15 that the channel spacings, the centre gap, and the distance to the lower and upper band limits respectively,should be agreed by the administrations concerned, dependent on the application and channel capacity
11、envisaged.NOTE 1 Examples of radio-frequency channel arrangements based on 3 are described in Annexes 1 and 2 to thisRecommendation.NOTE 2 An example of radio-frequency channel arrangements based on 4 is described in Annex 3 to thisRecommendation.ANNEX 1A description of a radio-frequency channel arr
12、angementin the 1 900-2 300 MHz band in accordance with 3An example of a radio-frequency channel arrangement for up to six go and return channels with a transmitter-receiverduplex spacing of 175 MHz, is derived as follows:Let f0be the centre frequency of the band, which equals 2 155 MHz,fnbe the cent
13、re frequency of one radio-frequency channel in the lower half of this band (MHz),f nbe the centre frequency of one radio-frequency channel in the upper half of this band (MHz),then the frequencies (MHz) of individual channels are expressed by the following relationship:lower half of the band: fn= f0
14、 136.5 + 14 nupper half of the band: f n= f0+ 38.5 + 14 nwhere:n = 1, 2, 3, 4, 5 or 6.Channel arrangements with carrier spacings of 7, 3.5 and 1.75 MHz are possible by means of channel subdivision.However, in certain countries, alignment with the channels given in Recommendation ITU-R F.283 might be
15、 required, inwhich case the preferred radio-frequency channel arrangement for up to five go and return channels also with atransmitter-receiver duplex spacing of 175 MHz, would be derived as follows:Let f0be the centre frequency of the band, which equals 2 155 MHz,fnbe the centre frequency of one ra
16、dio-frequency channel in the lower half of this band (MHz),f nbe the centre frequency of one radio-frequency channel in the upper half of this band (MHz),then the frequencies (MHz) of individual channels are expressed by the following relationship:lower half of the band: fn= f0 130.5 + 14 nupper hal
17、f of the band: f n= f0+ 44.5 + 14 nwhere:n = 1, 2, 3, 4 or 5.Channel arrangements with carrier spacings of 7, 3.5 and 1.75 MHz are possible by means of channel subdivision.Rec. ITU-R F.1098-1 3ANNEX 2A description of a radio-frequency channel arrangementin the 1 900-2 300 MHz band in accordance with
18、 3An example of a radio-frequency channel arrangement for five go and return channels, and up to eleven go and returnchannels in areas where other co-primary services may not fully utilize all of the spectrum, or geographic separation willallow continued use by the fixed service is described. This u
19、ses a transmitter-receiver duplex spacing of 189 MHz, and isderived as follows:Let f0be the centre frequency of the band, which equals 2 155 MHz,fnbe the centre frequency of one radio-frequency channel in the lower half of this band (MHz),f nbe the centre frequency of one radio-frequency channel in
20、the upper half of this band (MHz),then the frequencies (MHz) of individual channels are expressed by the following relationship:channels 1-11: fn= f0 150.5 + 14 n, (where n = 1, 2, ., 11)channels 1-7: f n= f0+ 38.5 + 14 n, (where n = 1, 2, ., 7)channels 8-11: f n= f0 339.5 + 14 n, (where n = 8, 9, .
21、, 11).Channel arrangements with carrier spacings of 7, 3.5 and 1.75 MHz are possible by means of channel subdivision.Channel arrangements with carrier spacings of 28 MHz are possible by channel concatenation.ANNEX 3Description of a radio-frequency channel arrangement in the1 900-2 300 MHz band in ac
22、cordance with 4An example of a radio-frequency channel arrangement based on 4 of this Recommendation for carrier spacings of 10MHz is derived as follows:Let f0be the centre frequency of 2 110 MHz = fr+ (84 2.5),fnbe the centre frequency of a radio-frequency channel in the lower half of the band (MHz
23、),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 following relationships:a) for systems with a carrier spacing of 10 MHz centred about the core band 2 030-2 110 MHz paired with2 220-2 300 MH
24、z (80 + 80 MHz), and with a transmitter-receiver duplex spacing of 190 MHz:lower half of the band fn= f0+ 5 10 n MHzupper half of the band f n= f0+ 195 10 n MHzwhere:n = 1, 2, 3, ., 8 (core);4 Rec. ITU-R F.1098-1b) for systems with a carrier spacing of 10 MHz centred about the extended band 1 920-2
25、110 MHz paired with2 110-2 300 MHz (190 + 190 MHz), and with a transmitter-receiver duplex spacing of 190 MHz:lower half of the band fn= f0+ 5 10 n MHzupper half of the band f n= f0+ 195 10 n MHzwhere:n = 1, 2, 3, ., 19 (extended).NOTE 1 In the application of this Annex, 1 of the main text should be observed._
