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FIELD STRUCTURE I
(24 fields of 12 bits) I
I
I I
104 256 256 ................................. 104
ENDOF END
AFTER FEC AND BLOCKED
'ACTIVE"0F
BLOCK 1 BLOCK 2 ". . ". ....................... SIGNAL BURST
BEFORE INTERLEAVING
APPLIES TO BURST
'-. 288 bits ,'
UW
SIGNAL UNIT
Figure 4-9 bis. C channel format at 8.4 kbitsl~c hannel rate
VW
No. 7 5
INTERLEAVE
BLOCK I
-. 96 96 96 ,
SIGNAL UNIT
BLOCK
16
BLOCK
2
SIGNAL UNIT
................................
Annex 10 - Aeronautical Telecommunications
-WlYOO No. 7s
THIS PAGE INTENTIONALLY LEFT BLANK
Volume IIZ
Part I Annex 10 - Aeronautical Telecommunications
Figure 4-10. C channel format at 10.5 kbitsls channel rate
b- 500 ms
2/11/00
No. 75
>
NlQUE
41 6 88 62
UNIQUE =
-- 5 1 W CHANNEL BITS b
MODE ONLY
88 62 4 7 ENDOF END
"ACTIVE" OF
SIGNAL BURST
u
APPLIES TO BURST
SCRAMBLE f
MULTIPLEX PRIMARY AND I SUEBAND DATA
12 b~ts
SUBBAND DATA FlELD
STRUCTURE (25 fields of 12 b i i
containing 31 signal units
12
I
plus 12 zeros) SIGNAL UNlT SIGNAL UNIT ZEROS
96
3 X 96 bits
46
-
4 INFORMATION FIELD b
( I
SUE EE FlELD
PRIMARY
FlyD
SUB
:iyi FlELD
PRIMARY
2
SUE- SUB
BAND BAND
DATA PRIMAW DATA
FIELD FIELD 25
Annex 10 - Aeronautical TelecommunLahbns Volume 111
ISSNL
SND Subnetwork Dependent
SNAc SubnetworkAccess
Figure 4-11. The SSNL functions and the ATN satellite subnetwork
Appendix 1 to Chapter 4
RESPONSE MASKS OF A-BPSK AND A-QPSK FILTERS
Table Al-1. Required filter amplitude versus frequency
response limits for A-BPSK
Table A1-2. Required filter phase versus frequency response
limits for A-BPSK and A-QPSK for 100 per cent roll-otT
Upper bound
Normalized Amplitude
frequency response (dB)
0 0.25
0.8 0.25
1.133 -3.5
1.333 -12
1.533 4 0
- -
- -
Lower bound
Normalized Amplitude
frequency response (dB)
0 -0.25 .
0.6 -0.25
0.9 -2.5
1.05 -5.5
1.22 -12
1.333 -28
1.333 4 5
ANNEX 10 - VOLUME IIl
The mask shall be defined by drawing straight lines through the above points where frequencies are normalized to
the channel rate divided by 2, and the amplitude is normalized to 0 dB at a frequency of 0. This mask is illustrated
in the guidance material.
Upper bound
Normalized Phase
frequency response (deg)
0 1.8
1 .O 1.8
1 .O 2.8
1.25 -~ 2 . 8
Lower bound
Normalized Phase
frequency response (deg) .
0 -1.8
1 .O -1.8
1 .O -2.8
1.25 -<- 2.8
The mask shall be defined by drawing straight lines through the above points where bequencies are normalized to
the channel rate divided by 2, and the amplitude is normalized to 0 dB at a frequency of 0. This mask is illustrated
in the guidance material.
Annex 10 - Aeronautical Tebecommunications Volume ZZI
Table A1-2 bk. Required 6lter phase versus frequency response
limits for A-QPSK for 60 per cent roll off
Table A1-3. Required filter amplitude versns frequency
response limits for A-QPSK for 100 per cent roll-ofl
Upper bound
Normalized Phase
frequency response (deg)
0 I .8
0.25 1.8
0.25 2.8
0.3 1 ->2 .8
Lower bound
Normalized Phase
frequency response (deg)
0 -1.8
0.25 -1.8
0.25 -2.8
0.31 -<- 2.8
The mask shall be defined by drawing straight lines through the above points where frequencies are normalized to
the channel rate divided by 2, and the amplitude is normalized to 0 dB at a frequency of 0. This mask is illustrated
in the guidance material.
Upper bound
Normalized Amplitude
frequency response (dB)
0 0.25
0.3 0.25
0.7 -1
1.1 -3
1.5 -6
1.7 -10
2.0 -20
2.5 4 0
3.0 4 0
Lower bound
Normalized Amplitude
frequency response (dB)
0 4.25
0.2 -0.25
0.5 -I
0.9 -3
1.2 -6
1.5 -10
1.7 -16
1.733 -27
1.733 4 0
The mask shall bt: defined by drawing stmight lines through the above points where frequencies are normalized to
the channel ratc divided by 4, and the amplitude is normalized to 0 dB at a frequency of 0. This mask is illustrared
in the guidance material.
Part I Annex 10 - Aeronauticab Telecommunicuiions
Table A1-3 bis. Requimd filter amplitude versus frequency
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