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276
k h m e n t A to Part I Annex 10 - Aeronautical Telecommunications
A-BPSK (Diff erentiil encoding) I
D
{all - 0 Q
Source d alternating
1s and 0s synchronous
with {q)
represents a delay of one bit time
@ .'reprerents XOR logic / ENCODING RULES 7
A-QPSK (Absolute encoding)
--
Figure A-3. Data encdem for modulator mode1
{all
Rate IT
I
b
-b
Q
(Demutliplexer) Rate l/r
Annex I0 - Aeronautical T~le~omrnunicutioris Volume III
{q) is input data sequence. Channel rate is
1 / l for A-BPSK
Data
1
Encoder
- Q
2/T for A-QPSK
{a,) is mapped into two bit streams on the I and Q lines,
each with bit rate 1 K
Local
*
is an ideal sampling process:
input = "I", output =
input = "O", output = -I (tt))
is a delay of: 0 for A-BPSK
T/2 for A-QPSK
-
z b
S u
Dl - PSF
u
- d2
s
are Pulse Shaping Filters
PSF
6 represents an ideal linear modulator
represents an ideal combiner
Figure A-4. Ideal modulator (A-BPSK and A-QPSK)
Attachment A to Part I Annex 10 - AeronautiMl Telecommunications
10
0
F e.
fi -10
$H -20
m
40
-50
0 1.0 2.0
Frequency normalized to' Channel Rate
Figure A-5. AES A-BPSK transmit filter response mask
1.0 2.0
Frequency normallred to Channel Rat%
Figure A-6. AES A-QPSK transmit filter response mask
Annex 10 - Aeronautical Telecommunications Volume ZZZ
4
3
2
hicn . 1
e.
H O .c n
-1
-2
-3
o 1.0 2.0
Frequency normalized to Channel Rate
Figure A-7. Phase deviation tolerance for A-BPSK and
A-QPSK transmit fdter response mask
Athchment A to Part I Annex 10 - Aeronautical Telecommurricadions
Frequency normalized to Symbol Rate
NOTES: -
1. The symbol rate is equal to the channel rate for A-BPSK and is half the channel fate with A-QPSK.
2. 'The frequency X is 35 kHz.
--
Figure A-8. Required spectral limits for AES transmissions
Annex 10 - Aeronautical Telecommunications Volume IZI
Frequency normalized to Channel Rate
(where X Is 35 kHz)
Figure A-9, Spectral mask of A-BPSK received by AES
Frequency normalized to Channel Rate
(where X Is 35 kHz)
Figure A-10. Spectral mask of A-QPSK received by AES
Attachment A to Part I Annex 10 - Aeronalrtical Telecommunications
GES
FRAME WN(P
I
- - - - - - -- -
AES
LINK LAMR
TRANSMIT
lHlERFACE
3
4
RF
T W K m
PATH
I
W W U R
I
LINK LAVER
RECHVE
INTERFACE
Figure A-11. P channel functional blocks
t t
FRAME SYNC. (m b wdpre wwd
IWIMdu nmy bl$
e n d m ~
a r p ~ t nlsdd ) -
FEC RK;M)Efl
* DanooUlATOR
---)
MsCRAMBlW 4
IMERLEAVER ---)
+ FECOeCODER +- OE-IWTWLEAVER +-
( I d ujqus
d h y h l b )
3 MOWLATOR
Annex 10 - Aeronuutical Tekcommunications V o h e ZZZ
AhWlDE TMNG FROM PCWNNEL
AW RUSH 0 m 1
LINK LAYER FEC
INTERFACE ENCODER
I I
Figure A-12. R and T channel functional blocks
IKlERLMVER
BIIWTASSEMBLY
( g s n e r a l e ~ d ,
m*m
---b
t t t
DE-INTWLMVER
LINK LAYER
RECoVE
INTERFACE
t DESRAMBLER
4
BUR&.T
ACPUlSmON ,
(qmb plsamwa3
and ujqm word)
FEC
D E C q R
MODULATOR
DEMDDUMTOA I
A#achment A to Part I Annex 10 -- Asra~utical Telecommunicaabns
LINES (wand b
SUBBAND DATA
IHERFACE
Bypass FEG mmdo and hrwlemw
m dm& AUKUI FK;
- T I
I PAM
INTERFACE (d m ove mY w
SUBMNO DATA
INTERFACE ~ a s F ~ ~ a n d d s h a a l s a v s
m dunwl Mhet FEC I
Figure A-13. C channel functional blocks
Annex 10 - Aeronautical Telecommunications Volume IZZ
Figure A-14. Satellite subnetwork connection-oriented packet data serrice
286
Arbchment A to Part I Annex 10 - Aeronauh*d Telecommunications
Cumulative probability
0 10 20 30 40 50 00 70 80 90 100
Delay, seconds
----- Lowest priority Highest priorlty
600 bits/$, 128 Octet SNSDU
Nomlnal Worst Case Trafflc Loading
I I
Figure A-15. Typical to-aircraft delay distributions
Adtachment A to Part I Annex 10 - Aenona&al Telecommun~ons
Figure A-17. Satellite subnetwork protocol entities and virtual circuit establishment
289
Annex 18 - Aeronautical TelecommunicaSi'ons Volume III
AES TELEPHONY INTERWORKING
FllNCTlONAL BLOCK DIAGRAM
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