1、 Rec. ITU-R F.1568-1 1 RECOMMENDATION ITU-R F.1568-1 Radio-frequency block arrangements for fixed wireless access systems in the range 10.15-10.3/10.5-10.65 GHz (Questions ITU-R 136/9 and ITU-R 229/9) (2002-2005) Scope This Recommendation provides radio-frequency (RF) block arrangements for fixed wi
2、reless access (FWA) systems in the range 10.15-10.3/10.5-10.65 GHz. Annexes 1 and 2 present RF block arrangements based on 28 MHz blocks and 30 MHz blocks, respectively. Homogeneous patterns with a channel slot of 0.25 MHz are also given in Annexes 1 and 2. The ITU Radiocommunication Assembly, consi
3、dering a) that fixed wireless access (FWA) systems in the range 10.15-10.65 GHz can provide enhanced telephony and data services; b) that several administrations have introduced FWA systems in bands within the range 10.15-10.65 GHz; c) that a flexible block (sub-band) arrangement, rather than use of
4、 a conventional point-to-point (P-P) channel arrangement can accommodate various FWA technologies, whilst remaining consistent with good spectrum management principles, including provision for inter-systems/ services operation and overall spectrum efficiency; d) that in some countries there may be c
5、ases where FWA systems need to coexist with P-P systems in the same fixed service (FS) allocation; e) that a standardized block width might offer benefits through economies of scale and simplified inter-system and inter-operator frequency planning in the same deployment area; f) that there are a num
6、ber of different access technologies that may be used, for which different channelling and/or frequency allocation schemes may be appropriate; g) that Recommendation ITU-R F.747, Annexes 1 and 2, presents radio-frequency arrange-ments for fixed wireless systems operating in the 10.5-10.68 GHz band;
7、h) that Recommendation ITU-R F.746, Annex 3, presents radio-frequency arrangements for fixed wireless systems operating in the 10.3-10.68 GHz band; j) that in some cases administrations may use other Recommendations to harmonize more readily with P-P channel arrangements; k) that Recommendation ITU-
8、R F.1191 provides limitation of unwanted emissions of FS systems for the adjacent bands, 2 Rec. ITU-R F.1568-1 recognizing a) that according to Article 5 of the Radio Regulations (RR), the frequency band 10.5-10.68 GHz is allocated to the FS on a worldwide basis and the frequency band 10-10.45 GHz i
9、n Regions 1 and 3; b) that the band 10.6-10.68 GHz is allocated to the Earth exploration-satellite service (passive), space research service (passive) and radio astronomy service on a primary basis; c) that the World Radiocommunication Conference (Istanbul, 2000) (WRC-2000) amended RR No. 5.480 to a
10、llocate the band 10-10.45 GHz for the FS in 14 countries of Region 2, noting a) that Recommendation ITU-R F.746 provides the basis for the development of radio-frequency arrangements and defines the main parameters affecting the choice of radio-frequency channel arrangements, recommends 1 that those
11、 administrations, planning to implement FWA systems in the frequency bands 10.15-10.3/10.5-10.65 GHz, should consider the block arrangements presented in Annexes 1 and 2; 2 that administrations should consider the adoption of carrier centre frequencies, within the preferred frequency blocks, from th
12、e channel slots of 0.25 MHz, as derived in Annexes 1 and 2; 3 that administrations wishing to adopt other homogeneous patterns, should consider the use of one or multiple slots of 0.25 MHz, as derived in Annexes 1 and 2. Annex 1 Radio-frequency arrangement based on 28 MHz blocks 1 This arrangement c
13、onsists of five adjacent blocks of 28 MHz bandwidth in the band 10.15-10.3 GHz, paired with five adjacent blocks of 28 MHz in the band 10.5-10.65 GHz, as per Fig. 1 (see Note 1). 1568-0110 15010154ABCDE A B C D E101821021010238102661029410 300 10 50010504105321056010588106161064410 650FIGURE 128 MHz
14、 block plan for the ranges 10.15-10.3/10.5-10.65 GHz(Frequencies in MHz)NOTE 1 In some countries blocks of 7 MHz may be accommodated within each 28 MHz block. These blocks can be aggregated to form larger blocks. Rec. ITU-R F.1568-1 3 2 Derivation of discrete channel slots of 0.25 MHz The discrete c
15、hannel slots of 0.25 MHz are derived as follows: fn= 10 150 + 0.25 n MHz where fnis the centre frequency (MHz) of each slot, and n ranges from 17 to 575, within the band 10.15-10.3 GHz, and from 1 417 to 1 975, within the band 10.5 to 10.65 GHz. Annex 2 Radio-frequency arrangement based on 30 MHz bl
16、ocks 1 This arrangement consists of five adjacent blocks of 30 MHz bandwidth in the band 10.15-10.3 GHz, paired with five adjacent blocks of 30 MHz in the band 10.5-10.65 GHz, as per Fig. 2. 1568-0210 150ABCDE A B C D E1018010210102401027010 300 10 50010530105601059010620106 50FIGURE 230 MHz block p
17、lan for the ranges 10.15-10.3/10.5-10.65 GHz(Frequencies in MHz)2 Derivation of discrete channel slots of 0.25 MHz The discrete channel slots of 0.25 MHz are derived as follows: fn= 10 150 + 0.25 n MHz where fnis the centre frequency (MHz) of each slot, and n ranges from 1 to 599, within the band 10.15-10.3 GHz, and from 1 401 to 1 999, within the band 10.5 to 10.65 GHz.
