where: reference frequency fr: = 2 702 MHz for the band 14.4-15.35 GHz, and a = 2 800 MHz for the band 14.5-15.35 GHz a = 1, 2, . . . with 32 for the band 14.4-15.35 GHz n N14 N14 ≤ and 30 for the band 14.5-15.35 GHz. n N14 ≤ The channel arrangement with = 11 701 MHz and a frequency spacing of 14 MHz is illustrated in fr Fig. 2; 3 that the preferred radio-frequency channel arrangement for medium-capacity digital fixed wireless systems operating with a 56 MHz channel spacing should be derived as follows: Let be the number of RF channels; N56 then the frequencies (MHz) of individual channels are expressed by the following relationships: lower half of the band: = + + 56 MHz fn fr a n upper half of the band: two options are possible for maintaining a common duplex separations with lower size channels arrangements: Option 1: = + 3 612 56 (N56 MHz f 'n fr n) – – Option 2: = + 3 584 56 (N56 MHz f 'n fr n) – – Option 1 should be used when corresponding 28 MHz arrangement provides = 2 N28 N56 channels, or when no lower channel arrangements are used. Option 2 should to be used when corresponding 28 MHz arrangement provides = 2 + 1 N28 N56 channels, : reference frequency fr = 2 674 MHz for the band 14.4-15.35 GHz, and a = 2 772 MHz for the band 14.5-15.35 GHz a = 1, 2, . . . with 8 for the band 14.4-15.35 GHz n N56, N56 ≤ and 7 for the band 14.5-15.35 GHz. N56 ≤ The channel arrangement with = 11 701 MHz and a frequency spacing of 56 MHz is illustrated in fr Fig. 3; FIGURE 1 Radio-frequency channel arrangement for radio-relay systems operating in the 15 GHz band: 28 MHz spacing
where: fr: reference frequency a = 2 702 MHz for the band 14.4-15.35 GHz, and a = 2 800 MHz for the band 14.5-15.35 GHz n = 1, 2, . . . N14 with N14 ≤ 32 for the band 14.4-15.35 GHz n and N14 ≤ 30 for the band 14.5-15.35 GHz. The channel arrangement with fr = 11 701 MHz and a frequency spacing of 14 MHz is illustrated in Fig. 2; 3 that the preferred radio-frequency channel arrangement for medium-capacity digital fixed wireless systems operating with a 56 MHz channel spacing should be derived as follows: Let N56 be the number of RF channels; then the frequencies (MHz) of individual channels are expressed by the following relationships: lower half of the band: fn = fr + a + 56 n MHz upper half of the band: two options are possible for maintaining a common duplex separations with lower size channels arrangements: Option 1: f 'n = fr + 3 612 – 56 (N56 – n) MHz Option 2: f 'n = fr + 3 584 – 56 (N56 – n) MHz Option 1 should be used when corresponding 28 MHz arrangement provides N28 = 2 N56 channels, or when no lower channel arrangements are used. Option 2 should to be used when corresponding 28 MHz arrangement provides N28 = 2 N56 + 1 channels, fr : reference frequency a = 2 674 MHz for the band 14.4-15.35 GHz, and a = 2 772 MHz for the band 14.5-15.35 GHz n = 1, 2, . . . N56, with N56 ≤ 8 for the band 14.4-15.35 GHz and N56 ≤ 7 for the band 14.5-15.35 GHz. The channel arrangement with fr = 11 701 MHz and a frequency spacing of 56 MHz is illustrated in Fig. 3; FIGURE 1 Radio-frequency channel arrangement for radio-relay systems operating in the 15 GHz band: 28 MHz spacing
R-REC-F.636-4-201203-I!!MSW-E.docx