1、STD-CEPT CEPT/ERC/REC 12-11 E-ENGL 1999 = 232bqLLi 001b125 7b7 CEPT/ERC/REC 12-11 E Page 1 Distribution: B CEPTERC RECOMMENDATION 12-11 E (Luxembourg 1999) RADIO FREQUENCY CHANNEL ARRANGEMENT FOR FIXED SERVICE SYSTEMS OPERATING IN THE BAND 51.4 - 52.6 GHz Recommendation adopted by the Working Group
2、Frequency Management“ (WGFM): “The European Conference of Postal and Telecommunications Administrations, considering 1) that CEPT should develop radio frequency channel arrangements in consultation with organisations developing standards for radio systems, in order to make the most effective use of
3、 the spectrum available; that the propagation characteristics of the 51.4 - 52.6 GHz are ideally suited for use of short range digital radio links in high density networks; 2) noting that Radio Regulations allocate the band 5 1.4 - 52.6 GHz on a primary basis for Fixed and Mobile; that in the freque
4、ncy range a high antenna directivity is achievable even with small size antennas, increasing the density of equipment and further reducing risk of interference with same and other services; that differing applications licensed by various administrations may require different radio-frequency channel
5、arrangements; that the applications in this frequency band may require differing channel bandwidths; that several services with various transmission signal characteristics and capacities may be in simultaneous use in this frequency band; that a high degree of compatibility between radio-frequency ch
6、annels of different arrangements can be achieved by selecting channel centre frequencies within a homogeneous basic pattern; recommends 1) that the CEPT Administrations should follow the recommended channel arrangements for systems in the frequency range 5 1.4 - 52.6 GHz given in Annex A. CElT/ERC/R
7、EC 12-11 E Page 2 ANNEX A RADIO-FREQUENCY CHANNEL ARRANGEMENT IN THE BAND 51.4 - 52.6 GHz The radio frequency channel arrangement for channel separations of 56 MHz, 28 MHz and 14 shall be derived as follows: Let Fr fn be the reference frequency of 51412 MHz, be the centre frequency (MHz) of the radi
8、o-frequency channel in the lower half of the band, be the centre frequency (MHz) of the radio-frequency channel in the upper half of the band, fn? TX/RX separation Band separation - 616 MHz, - 112 MHz, then the frequencies (MHz) of individual channels are expressed by the following relationships: a)
9、 for systems with a channel separation of 56 MHz: lower half of the band: upper half of the band: fn = fr + 56 n fn? = fr + 616 + 56 n wheren=1,2, . 9 b) for systems with a channel separation of 28 MHz: lower half of the band: upper half of the band: fn = fr + 14 + 28 n fn? = fr + 630 + 28 n wheren=
10、 1,2,3, _ 18 c) for systems with a channel separation of 14 MHz: lower half of the band: upper half of the band: fn = fr + 21 + 14 n fn?=fr+637+ 14n where n = 1,2, 3, . . . 36 CEPTIERCIREC 12-11 E Page 3 ANNEX A Figure 1 Occupied spectrum: 51.4 to 52.6 GHz Band a) 56 MHz channels Guard band Centre g
11、ap Guard band 40 MHz 112 MHz 40 MHz 9 x 56 MHz 9 x 56 MHz 5 1.944 52.056 52.6 GHz 51.4 GHz 52.56 GHz 5 1.44 GHz b) 28 MHz channels Centre gap Guard band 40 MHz Guard band 40 MHz 112 MHz i8 x 28 MHz 18 x 28 MHz I I 51.4 GHz 51.44 GHz i1.944 52.05; 52.6 GHz 52.56 GHz c) 14 MHz channels Centre gap Guar
12、d band 40 MHz Guard band 40 MHz 112 MHz 36 x 14 MHz 36 x 14 MHz 5 1.944 52.056 52.6 GHz 52.56 GHz 51.4 GHz 51.44 GHz STD.CEPT CEPT/ERC/REC 12-LL E-ENGL 1999 H 232b414 OLbL28 47b fl MHz 5 1468 5 1454 5 1447 CEPTIERCIREC 12-11 E Page 4 fn fl fn z1s z2s YS DS MHz MHz MHz MHz MHz MHz MHz 51916 52084 525
13、32 68 68 168 616 51930 52070 52546 54 54 I68 616 5 1937 52063 52533 47 47 168 616 ANNEX B Table 1 Calculated parameters according to ITU-R Rec. 746 II 14 11 ,. 36 XS YS ZlS Z2S DS Separation between centre frequencies of adjacent channels Separation between centre frequencies of the closest go and return channels Separation between the lower band edge and the centre frequency of the first channel Separation between centre frequencies of the final channel and the upper band edge Duplex spacing (f n - fn)
