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4.05 -3
0.05 -3
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1. The mask shall be dcfined by drawing straight lines through the above points where frequencies are normalized to the channel
rate, and the amplitude is normalized to 0 dB at a frequency of 0.
2. X is 35 kHz. For larger frequency offsets the spurious requirements of 4.2.3.5.6 apply.
Nure.- This mask is illustrated in the griidance material canfaincd in Attachment A to Part I.
Part I Annex 10 - Aeronautical Telecommunications
Table 4-7A. Required spectral limits for A-QPSK received by AES
for 60 per cent roll-off
Uppcr bound
Amplitude response
Normalized frequency (dB
-X 4 0
-0.839 4 0
4.43 -35
-0.41 -22
-0.375 -1 3
4.357
4.34 -8
-0.286 4.4
-0.232 -1.6
-0.16 0
-0.125 0.25
-0.107 -
0.107 -
0.125 0.25
0.16 0
0.232 -1.6
0.286 -4.4
0.34 -8
0.357 -
0.375 -13
0.41 -22
0.43 -35
0.839 4 0
X 4 0
1. The mask shall be defined by drawing straight lines through
Lower bound
Amplitude response
Normalized frequency (&I
-X -
-0.839 -
4.43 -
-0.41 -
-0.375 -25
-0.357 -15
-0.34 -1 1
4.286 -6.4
-0.232 -2.6
-0.16 -1
4.125 -
-0.1 07 -0.25
0.107 -0.25
0.125 +
0.16 -1
0.232 -2.6
0.286 -6.4
0.34 -1 1
0.357 -15
0.375 -25
0.41 -
0.43 -
0.839 -
X -
the above points where frequencies are normalized to the
channel rate, and the amplitude is' normalized to 0 dl3 at a frequency of 0.
2. X is 35 kHz. For larger frequency offsets, the spurin~~resq uirements of 4.2.3.5.6a pply.
Note.- This mask is illustrated iir the guidance material contained in Attachment A to Part I.
Annex 10 - Aeronautical TeIecommlsnications
THIS PAGE INTENTIONALLY LEFT BLANK.
Vobme III
Part l Annex I0 - Aeronautical Telecommlsnicntions
Table 4-8. Demodulator performance
Channel type Required BER (dB)
P: 0.6, 1.2 and 2.4 kbitds l(r5 7.3
R,T: 0.6, 1.2 and 2.4 kbitsls lr5 7.5
P: 4.8 and 10.5 kbitsls lo-s 5.4
R,T: 4.8 and 10.5 kbitsls 1 0-5 5.7
C: 5.25 kbitsls 1 r3 10.8
C: 6.0 kbitds 1 r3 3.9
C: 8.4 kbitsls, 7.5 k13z2> lr3 7.0
C: 10.5 kbitsls, 10 kHz2 I op3 10.8
C: 10.5 kbitsls, 7.5 kHz2 1 0-3 12.7
C: 21.0 kbitsls 1 0-3 5.4
1. Eflo is the ratio of the average energy transmitted per channel bit period to the noise power
spectral density.
2. Channel spacing.
3. Demodulator performance shall be tested with the local frequency offset of adjacent channels
of 1.5 kHz towards the carrier frequency.
Table 4-9. Channel rates
Table 4-10. P channel information field components
Channel rates (kbitsls)
Applicable channels
AES receive AES transmit
0.6 P R,T
1.2 P R,T
2.4 P R,T
4.8 P R,T
5.25 C C
6.0 C C
8.4 C C
10.5 PC R,T,C
21.0 C C
Number of bits
Number of interleaver blocks
Number of Suslinterleaver block
Channel rate (kbitsls)
0.6 1.2 2.4 4.8 10.5
1152 1152 1152 2304 4992
3 2 1 1 I
2 3 6 12 26
Annex 10 - Aeronalstical Telecommunications
Bble 4-11. P channel interleaver structure
Table 4-12. R and T channel preamble structure
Interleavcr columns
Channel rate (kbitsls)
0.6 1.2 2.4 4.8 10.5
6 9 18 36 78
Table 4-13. T channel interleaver structure
Unmodulated carrier (equivalent bit periods)
Modulated bits
Total
Channel rate (kbitsts)
0.6 1.2 2.4 10.5
Interleaver columns:
first block 5 5 5 8-95]
subsequent blocks 3 3 3 NA
1. The number of interleaver columns is variable from 8 to 95 in steps of 3 and is chosen to match the amount of data.
Channel rate (kbitsls)
0.6 1.2 2.4 10.5
150 126 7 8 248
74 74 74 256
224 200 152 504
Table 4-14. C channel preamble structure
Channel rate (kbitsls)
, 5.25 6.0 8.4 10.5 21.0 /
Unmodulated carrier (equivalent bit periods) i 80 96 not required 160 336 I
Modulated bits 128 144 0 256 504
208 240 0 416 840
-
211 woo
No. 75
Part Z Annex 10 - Aeronautical Xelecommunications
Table 4-26. Subnetwork connection priority mapping
Categories of messages
Unspecified
Reserved
Distress communications, urgent
communications, networWsystems
management
Reserved
Reserved
Communications relating to di~ction
finding, flight safety messages
Reserved
Reserved
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