1、 CEPT CEPT/ERC/REC 12-03uE 94 2326434 00112993 9Tb CEPTIERCIREC 12-03 E Page 1 Distribution: 6 CEPT/ERC/RECOMMENDATION 12-03 E (Bonn 1994) FIARMONISED RADIO FREQUENCY CHANNEL ARRANGEMENTS FOR DIGITAL TERRESTRIAL FIXED SYSTEMS OPERATING IN THE BAND 17.7 GHz TO 19.7 GHz Recommendation proposed by the
2、Working Group “Spectrum Engineering” (WGSE) Text of the recommendation adopted by the “Eiiropean Radiocommunications Committee” (ERC): “The European Conference of Postal and Telecommunications Administrations, considering i. that CEPT should develop radio frequency channel arrangements in consultati
3、on with organisations developing standards for radio systems, in order to make the most effective use of the spectrum available, 2. that compatibility between systems of different capacities should be assured, 3. that for low capacity digital systems there exist many links among CEPT countries using
4、 various arrangements according to Recommends 6 of 1TU-R Rec. F. 595, 4. the main deployment is foreseen by the majority of CEPT Administrations for medium and high capacity digital systems, noting a) that Article 8 of the Radio Regulations allocates in Region 1 the band 17.7 GHz - 19.7 GHz on equal
5、 primary basis to the Fixed, Fixed-Satellite and Mobile services. Sharing criteria between Fixed and Mobile, and Fixed and Fixed-Satellite services may be required, b) that radio frequency channel arrangements have been recommended by 1TU-R for medium and high capacity digital systems in the 17.7 GH
6、z - 19.7 GHz band, recommends I. that for medium and high capacity digital systems, CEPT Administrations should follow the recommended radio frequency channel arrangements for the band 17.7 GHz - 19.7 GHz (Annex A), 2. that for low capacity digital systems channel frequency arrangements may be accom
7、modated, on a national basis, within any of the high capacity channels or guard bands. Editiori fAigust 26. IY96 CEPTIERCIREC 12-03 E Page 2 Left blank Edition of August 26, 1996 CEPT CEPT/ERC/REC l12-03+E 94 M 2326434 0032775 779 = CEPTIERCIREC 12-03 E Annex A, Page 1 Annex A Let fo fn fn be the ce
8、ntre frequency (MHz) of the 17.70 - 19.70 GHz band (F,) =I8700 MHz), be the centre frequency (MHz) of a radio frequency channel in the lower half of the band, be the centre frequency ofa radio frequency channel in the upper half of the band, then the frequencies (MI-lz) of individual channels are ex
9、pressed by the following relationships: CO-CHANNEL ARRANGEMENT (see Fig. 1) for systems with a carrier spacing of 1 IO MHz: lower half of the band: upper half of tlie band: for systems with u carrier spacing of 55 MHz: lower half of the band: upper half of the band: for systems with a carrier spacin
10、g of 27.5 Mk: lower half of tlie band: fn-fo- 1000 t 110n fn=fo+ 10+ 110n fil = fo - 1000 + 55 Il fn = fo + 10 i- 55 II fii = fo - 1000 + 27.5 n upper half of the band: fii = fo + I O -+ 27.5 II for systems with a carriet spacing of 13.75 MHz: lower half of the band: upper half of the band: fii = fo
11、 - 1000 + 13.75 n fn - fo t 10 + 13.75 II where n = 1, . 8 where n = 1, . 17 where n = 1, . 35 where II = i, . . . 70 Editioti of August 26, 1996 CEPT CEPT/ERC/REC 12-03*E 9q 2326434 0012996 605 CEPTIERCIREC 12-03 E Annex A, Page 2 +- 110 -2 + 12345678 1 2 3 4 6 6 7 8 t 110 1970 f0 FIGURE 1 Radio iirquency channel arrangement for digitai radio-relay systems operating in the 17.7 GHz - 19.7 GHz band (Cbcimnel arrangement) (All frequencies are in h4Hz) Edition of August 26, 1996
