RECOMMENDATION ITU-R F.637-3 - Radio-Frequency Channel Arrangements for Fixed Wireless

Rec. ITU-R F.637-3 1

RECOMMENDATION ITU-R F.637-3*

Radio-frequency channel arrangements for fixed wireless systems operating in the 23 GHz band (Question ITU-R 108/9)

(1986-1992-1994-1999)

The ITU Radiocommunication Assembly, considering a) that the band 21.2-23.6 GHz is allocated to the fixed and other services; b) Resolution 525 of the World Administrative Radio Conference for Dealing with Frequency Allocations in Certain Parts of the Spectrum (Malaga-Torremolinos, 1992); c) that both analogue and digital systems are in use in this band; d) that the band is used for differing applications by various administrations and that these applications may require different radio-frequency (RF) channel arrangements; e) that several types of service with various capacities may be in simultaneous use in this frequency band; f) that the band allocated to each service or even to each administration may vary from one country to another; g) that the applications in this frequency band may require differing channel bandwidth; h) that a high degree of compatibility between RF channels of different arrangements can be achieved by selecting all channel centre frequencies from a homogeneous basic pattern, recommends 1 that RF channel arrangements for the band 21.2-23.6 GHz should be based on a homogeneous pattern; 2 that the homogeneous pattern with a preferred 3.5 MHz interval be defined by the relation:

fp  fr  3.5  3.5 p where: 1  p  685 f : reference frequency of the homogeneous pattern;

* Radiocommunication Study Group 9 made editorial amendments to this Recommendation in 2002, in accordance with Resolution ITU-R 44. 2 Rec. ITU-R F.637-3

3 that the homogeneous pattern with a preferred 2.5 MHz interval be defined by the relation:

fp  fr  4  2.5 p where: 1  p  959 f : reference frequency of the homogeneous pattern; 4 that the reference frequency of the homogeneous pattern for international connections should be:

fr   196 MHz other reference frequencies may be agreed by the administrations concerned; 5 that all go channels should be in one half of any bidirectional band, and all return channels in the other; 6 that the channel spacings, XS, the centre gap, YS, and the distance to the lower and upper band limits, Z1S and Z2S, should be agreed by the administrations concerned, dependent on the application and channel capacity envisaged (see Recommendation ITU-R F.746 for definitions of XS, YS and ZS). NOTE 1 – Examples of channel arrangements based on this Recommendation are described in Annexes 1, 2, 3, 4 and 5. NOTE 2 – Due regard has to be taken that, in certain countries, a 3.5 MHz homogeneous pattern, interleaved by 1.75 MHz from that referred in § 2, is used in conjunction with the main pattern.

ANNEX 1

RF channel arrangements in the band 21.2-23.6 GHz in accordance with recommends 2 (United Kingdom)

In the United Kingdom, the use of the band 21.2-23.6 GHz is based on a homogeneous 3.5 MHz frequency pattern. Various channel spacings are accommodated as shown in Fig. 1 and interleaved patterns are also used for the various spacings. In some applications, additional channels can be added in the edge and central guardbands using the homogeneous pattern. Rec. ITU-R F.637-3 3

FIGURE 1 Radio-frequency channel arrangements for digital and analogue fixed wireless systems operating in the 21.2-23.6 GHz band (United Kingdom) (All frequencies in MHz)

Go (return) Return (go) 1 200 1 200 224

1 2 3 4 5 6 7 8 9 10 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' H V a) 80 112

22 400

21 200 140 23 600 1 2 3 4 37 38 39 40 1' 2' 3' 4' 37' 38' 39' 40' H V b) 38 28 126

1 2 79 80 1' 2' 79' 80' H V c) 14 31 119

1 2 3 4 157 158 159 160 1' 2' 3' 4' 157' 158' 159' 160' H V d) 7 27.5 115.5

314 316 318 320 314' 316' 318' 320'

1 2 3 4 5 6 7 8 313 315 317 319 1' 2' 3' 4' 5' 6' 7' 8' 313' 315' 317' 319' H V e) 25.75 3.5

Note 1 - The RF channel arrangements of Fig. 1e) are derived by the use of carriers interleaved between those of the homogeneous pattern of recommends 2. 0637-01 4 Rec. ITU-R F.637-3

ANNEX 2

RF channel arrangements in the band 21.2-23.6 GHz in accordance with recommends 2 (France)

In France, the use of the band 21.2-23.6 GHz is based on the homogeneous 3.5 MHz frequency pattern as shown in Fig. 2. The applications are as follows: – 21.2-22 GHz band (Part A of Fig. 2) Television picture transmission In this sub-band, two frequency plans are used as shown in Part A of Fig. 2 – 22-22.5 GHz band (Part B of Fig. 2) Television picture transmission and telephony or television picture information transmission at 34 Mbit/s – 22.5-23.065 GHz band (Part C of Fig. 2) Television picture transmission, telephony or television information transmission at 34 Mbit/s as well as narrow-band type applications such as: – data transmission below 144 kbit/s, – additional stereophonic sound channel, – additional 2 Mbit/s point-to-point system, – TDMA point-to-multipoint system. For narrow-band systems, subdivision of each 28 MHz channel, on the basis of 7 MHz, is adopted. – 23.065-23.5 GHz band (Part D of Fig. 2) FM and AM tele-distribution applications – 23.5-23.6 GHz band (Part E of Fig. 2) Application for non-telephony use. Rec. ITU-R F.637-3 5

FIGURE 2 Radio-frequency channel arrangements for digital and analogue fixed wireless systems operating in the 21.2-23.6 GHz band (France) (All frequencies in MHz)

21 200 23 600 22 000 22 500 23 065 23 500

A B C D E

1b 2b 7b 1b' 2b' 7b' 1a 2a 7a 1a' 2a' 7a' 17 28 28 28 28 28 28 28 27 A

21 200 22 000

1 2 8 1' 2' 8' 29 28 56 28 23 B

22 000 22 500

1 2 9 1' 2' 11' 19 28 28 28 14 C

22 500 23 065

1 2 3...

23 065 23 500

1 2 3 16 17 18 20 3.5 3.5 20.5 E

23 500 23 600

0637-02 6 Rec. ITU-R F.637-3

ANNEX 3

Radio-frequency channel arrangements for some CEPT administrations in the band 22.0-22.6 GHz paired with 23.0-23.6 GHz in accordance with recommends 2

An example of radio-frequency channel arrangements in the band 22.0-22.6 GHz paired with 23.0- 23.6 GHz for carrier spacings of 112 MHz, 56 MHz, 28 MHz, 14 MHz, 7 MHz and 3.5 MHz is derived as follows:

Let f0 be the centre frequency of 21 196 MHz; fn be the centre frequency of a radio-frequency channel in the lower half of the band (MHz); be the centre frequency of a radio-frequency channel in the upper half of the band (MHz); then the frequencies of individual channels are expressed by the following relationships: a) for systems with a carrier spacing of 112 MHz:

lower half of the band: fn  f0  770  112 n MHz

upper half of the band:  f0  1 778  112 n MHz where: n  1, . . . 5 b) for systems with a carrier spacing of 56 MHz:

upper half of the band:  f0  1 834  56 n MHz where: n  1, . . . 9 c) for systems with a carrier spacing of 28 MHz:

upper half of the band:  f0  1 806  28 n MHz where: n  1, . . . 20 Rec. ITU-R F.637-3 7 d) for systems with a carrier spacing of 14 MHz:

upper half of the band:  f0  1 813  14 n MHz where: n  1, . . . 41 e) for systems with a carrier spacing of 7 MHz:

lower half of the band: fn  f0  808.5  7 n MHz

upper half of the band:  f0  1 816.5  7 n MHz where: n  1, . . . 83 f) for systems with a carrier spacing of 3.5 MHz:

lower half of the band: fn  f0  805  3.5 n MHz

upper half of the band:  f0  1 813  3.5 n MHz where: n  1, . . . 168.

NOTE 1 – The radio-frequency channel arrangements of a) to f) above use channel centre frequencies fn and selected from the homogeneous pattern of recommends 2. NOTE 2 – Figure 3 gives occupied spectrum in the 22.0-23.6 GHz band. 8 Rec. ITU-R F.637-3

FIGURE 3 Radio-frequency channel arrangements in the band 22.0-22.6 GHz paired with 23.0-23.6 GHz

a) 112 MHz channels (7 MHz × 16)

Guard band Guard band Guard band 22 MHz 18 MHz 400 MHz 30 MHz 10 MHz

5 × 112 MHz channels 5 × 112 MHz channels

b) 56 MHz channels (7 MHz × 8) 50 MHz 46 MHz 400 MHz 58 MHz 38 MHz

c) 28 MHz channels (7 MHz × 4)

8 MHz 32 MHz 400 MHz 16 MHz 24 MHz

d) 14 MHz channels (7 MHz × 2)

e) 7 MHz channels

f) 3.5 MHz channels

2.75 MHz 9.25 MHz 400 MHz 10.75 MHz 1.25 MHz

168 × 3.5 MHz channels 168 × 3.5 MHz channels

22.0 GHz 22.6 GHz 23.0 GHz 23.6 GHz 0637-03 Rec. ITU-R F.637-3 9

ANNEX 4

Description of the radio-frequency channel arrangements in the band 21.2-23.6 GHz in accordance with recommends 3 (North America)

In the United States of America and Canada, the most widespread use of the 21.2-23.6 GHz band is in the 21.8-22.4 GHz and 23.0-23.6 GHz portions for which a frequency pattern with 50 MHz channels has been adopted. The same pattern is being used in the remainder of the 21.2-23.6 GHz band as usage is spreading. Accordingly, a homogeneous pattern is in use, based on recommends 3 and given by:

fn  fr – 21  50 n where: n  1, 2, 3, . . . 48

f (reference frequency)  21 196 MHz.

For two-way operation, the go-return separation is about 1 200 MHz. Typical systems in use include digital transmission at data rates between about 1.5 and 8 Mbit/s, and a variety of analogue video systems.

ANNEX 5

Radio-frequency channel arrangements in the band 21.2-23.6 GHz in accordance with recommends 2 (Germany)

Taking into account the fact, that: – WARC-92 has allocated the band 21.4-22.0 GHz to the broadcasting-satellite service (BSS) on a primary basis in Regions 1 and 3; – many individual reception units for the BSS are expected to be used and interference from the fixed service (FS) should be minimized; the operational use of fixed wireless systems in the sub-band 21.4-22.0 GHz should be avoided. The band plan based on WARC-92 decisions is shown in Fig. 4a. 10 Rec. ITU-R F.637-3

FIGURE 4a Band plan for the band 21.2-23.6 GHz based on WARC-92 decisions

Broadcasting- FS simplex FS duplex FS duplex satellite TV Go (Return) FS simplex Return (Go) service

21.2 21.4 22.0 22.6 23.0 23.6

0637-04a

An application of the band plan (Fig. 4a) for analogue and digital fixed wireless systems (2 Mbit/s to 155 Mbit/s) is described in detail in Fig. 4b. Rec. ITU-R F.637-3 11 5 5 . . b 6 6 4 0 0 0 - 6 7

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l g a o t l i a g n i A D d n e g 3 1 e 0 L 0 4

3 1 4 2 6 5 4 8 2 3 2 0 1 0 2

1 2 7 1 12 Rec. ITU-R F.637-3