1、 - _ STDUCEPT CEPTIERCIREC 52-O2 E-ENGL 3976 W 23264l4 0034550 7bl = CEPTERWFIEC 12-02 E Page 1 Disbibution: B CEPTlERCRECOMMENDATION 12-02 E (Bonn 1994) HARMONISED RADIO FREQUENCY CHANNEL ARRANGEMENTS FOR ANALOGUE AND DIGITAL TERRESTRIAL FIXED SYSTEMS OPERATING IN THE BAND 12.75 GHz TO 13.25 GHz Re
2、commendation proposed by the Working Group “Spectrum Engineering” (WGSE) Text of the recommendation adopted by the “European Radiocommunications Committee ” (ERC): “The European Conference of Postal and Telecommunications Administrations, considering 1. that CEFT should develop radio frequency chann
3、el arrangements in consultation with organisations developing standards for radio systems, in order to make the most effective use of the spectrum available, 2. that the propagation characteristics of the band 12.75 GHz to 13.25 GHz are ideally suited to medium- range high grade digital nXed systems
4、, 3. that the anticipated developments in telecommwiications networks will require large numbers of medium- range links in the supporting infrastructure, 4. that a number of new or existing systems could operate successfully in the band 12.75 GHz to 13.25 GHz thus relieving congestion and reducing t
5、he demand for spectrum m the lower frequency bands, 5. that any radio frequency channel arrangement should incorporate a provision for the future introduction of improved equipment standards, noting that Article 8 of the Radio Regulations allocates the band 12.75 GHz to 13.25 GHz on an equal primary
6、 basis to the Fixed, Fixed Satellite and Mobile services. Sharing criteria between Fixed and Mobile, and Fixed and Fixed Satellite services may be required, that in some CEPT countries there are existing fixed systems in the band 12.75 GHz to 13.25 GHz which are not operating in accordance with the
7、channel arrangement given in Annex A, in particular the 3.5 MHz raster is used with a 1.75 MHz shift with respect to that shown in Annex A, that in some CEE couniries the band 12.75 GHz to 13.25 GHz is currently unavailable for the Fixed SeMCe, that current equipment standards support a 1.75 MHz ras
8、ter, Edition of August 26,1996 STD-CEPT CEPT/ERC/REC $2-02 E-ENGL 1996 - 2326434 OOLit552 bTB m CEPT/ERC/REC 12-02 E Page 2 recommends 1. that CER Administrations which have the band 12.75 GHz to 13.25 GHz available for the Fixed Service should follow the recommended radio fkequency channel arrangem
9、ents for the band 12.75GH.z to 13.25 GHz given in Annex A, 2. that in order to obtain maximum spectrum utilisation, the centre gap and guard bands may be used for a variety of low capacity systems, provided that the limits for out-of band emissions are met, 3. that administrations may choose to allo
10、w existing systems to remain in the band 12.75 GHz to 13.25 GHz until the yeax 2008, and may determine, on a national basis, the degree of protection given. International coordination between existing and new systems shall be in accordance with Article 12 of the Radio Regulations, 4. that one or mor
11、e 28MHz channels can be sub-divided for low capacity digital systems according to Annex A.” Edition of August 26, 1996 STDoCEPT CEPT/ERC/REC 12-02 E-ENGL 177b 2326414 0034552 534 II CEPTERCIREC 12-02 E Annex A, Page 1 Annex A 1. DERIVATION OF PROPOSED FREQUENCY CHANNELS Let fo be the frequency of 12
12、9% MHz as given in ITU-R Recommendation 497, Recommends 9, fi be the centre frequency in MHz of a radio-frequency channel in the lower half of the band, h be the centre frequency in MHz of a radio-frequency channel in the upper half of the band, then the frequencies of the individual channels are ex
13、pressed by the following relationships: fa systems with a carrier spacing of 28 MHz: lower half of the band: upper half of the band h = fo -259 +28 n fn = fo +7 + 28 n for systems with a carrier spacing of 14 MHZ: lower half of the band: upper half of the band fn = fo -252 + 14n fn=fo+14+14n for sys
14、tems with a carrier spacing of 7 MHz: lower half of the band: upper haif of the band h = fo - 248.5 + 7 n 6i = fo + 17.5 + 7 n wheren = 1, 2, . 8 wheren = 1, 2, . 16 wheren= 1, 2, . 32 for systems with a carrier spacing of 3.5 MHz: lower half of the band: upper half of the band fn = fo - 246.75 + 3.
15、5 n h = fo + 19.25 + 3.5 n wheren = 1, 2, . 64 for systems with a carrier spacing of 1.75 MHz: lower half of the band: upper half of the band fn = fo - 245.875 + 1.75 n fn = fo - 20.125 + 1.75 n where n = 1, 2, . . . 128 Edition of August 26,19% STD-CEPT CEPT/ERC/REC 12-02 E-ENGL 177b 2326414 001455
16、3 470 CEPTERCIREC 1242 E Annex A, Pqe 2 I Figure 1 : Kadio-hequency channel arrangement usmg 28 MHz channel spacing 12750 MHz 13250 MHz 123 45 678 1 2 3 4 5 6 7 8 I l I II III I I p 15 Hz F i Figure 2: Examples of radio-frequency channel arrangements subdivided for smaller capacity digital systems (
17、a) Sub-division of 28 MHz channels to 14 MHz, 7 MHz and 3.5 MHz channels 14 MHz channels 3.5 MHz channels (b) Further subdivision to 1.75 MHz channels & 11.75 MHz channels I I I I Edition of August 26, 1996 2326434 0034097 398 Adm AUT CEPTERCDC 12-02 Harmonised radio frequency channel arrangements for analogue and digital terrestrial fixed systems operating in the band 12.75 GHz to 13.25 GHz Imp1 Remarks Under studv DNK EST Yes Under studv FIN HNG HOL LVA NOR POR IYes I _ Yes Yes Yes Planned Yes Intent of this Recommendation is met through the national footnote H 122 of NTFA
