Transcript HAMTV Proposta AMSAT Italia

HAMTV
AMSAT Italia Proposal
for a television down link from
ESA Columbus module
Emanuele D’Andria, IØELE
President - AMSAT Italia
Piero Tognolatti, IKØKPT
Vice President – AMSAT Italia
Dayton Hamvention 2012, May 18-20
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
CONTENTS
• Proposal outcome
• Down-link Frequency Band Identification
• 2.4 GHz Band limits
•
•
•
•
•
Television Standard Selection
Link Budget definition
First experiments and preliminary results
Chained Ground segment
HAMTV Level Chart
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
PROPOSAL OUTCOME
• Disclosure of the study to ARCOL WG
• Ideas for an “unsolicited proposal” to ESA
• ESA, Astrium, Kayser Italia and Amsat Italia
Technical Interchange Meeting on 11 Nov
2010
• Contract signed between ESA and Kayser
Italia on August 2011
• Contract deadline February 1, 2013
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
FREQUENCY BAND IDENTIFICATION
•
ITU Table of frequency allocations to services– Footnote 5.282
•
5.282
•
The frequency band 2400-2450 MHz is the only one usable in down link with
enough bandwidth to accomodate a television transmission and for which a
suitable antenna is installed on board ISS.
In the bands 435-438 MHz, 1 260-1 270 MHz, 2 400-2 450 MHz, 3 4003 410 MHz (in Regions 2 and 3 only) and 5 650-5 670 MHz, the amateursatellite service may operate subject to not causing harmful
interference to other services operating in accordance with the Table
(see No. 5.43). Administrations authorizing such use shall ensure that
any harmful interference caused by emissions from a station in the
amateur-satellite service is immediately eliminated in accordance with
the provisions of No. 25.11. The use of the bands 1 260-1 270 MHz and
5 650-5 670 MHz by the amateur-satellite service is limited to the Earthto-space direction.
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
S-BAND SPECTRUM ALLOCATION
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
2.4 GHz FREQUENCY BAND LIMITS
I Part
• Secondary allocation to the amateur satellite
service (or even less)
• ISM Band (Wi-Fi, Bluetooth, Microwave ovens,
medical equipments, WLAN, etc.)
• Wi-Fi applications on ISS
• On-ground reception interfered-with by
pervasive applications (Wi-Fi, Bluetooth,
microwave ovens, etc.)
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
2.4 GHz FREQUENCY BAND LIMITS
II Part
• Fall-back proposal for an alternative channel (i.e.
2395 MHz) in the higher part of the band 23002400 MHz on non-interfering basis (RR. 4.4) in
addition to the nominal channel at 2422 MHz
(channel 3 of Wi-Fi raster)
• Consciousness of no primary allocation to the
amateur satellite service in the UHF band (300 –
3000 MHz) with a suitable bandwidth
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
TELEVISION STANDARD SELECTION
Comparison between:
• Analogue standard (FM)
ΔFpp=16 MHz, BW=28 MHz
• Digital standard (DVB)
DVB-S (QPSK)
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
FM ATV - ArCOL LINK
FMBUDGET
TV from
Downlink frequency
ISS to E/S range
Value
2.450
1000
Unit
GHz
Km
EARTH STATION CHARACTERISTICS
Antenna diameter
Efficiency
Rx Antenna gain
0.90
50%
24.3
meters
Antenna Noise Temperature (see
footnote)
LNB gain
LNB noise figure
LNB equiv noise temp
100
35
0.8
58.7
K
dB
dB
K
FIGURE of MERIT G/T
System Noise Temp
System Noise Figure
G/T
158.7
1.9
2.3
K
dB
dB/K
CARRIER CHARACTERISTICS
Peak to Peak frequency deviation DFpp
TV signal bandwidth Bv
Modulation
Carrier's occupied bandwidth
pw [Unified] CCIRR Rep. 637 pre/deemphasis
dBi
16
6
FM
28
MHz
MHz
13.2
dB
MHz
Columbus
TX & Downlink
TX power
cable & connector losses
TX Antenna gain (boresight)
pointing losses
Downlink e.i.r.p. toward earth receive station
Downlink path loss (free space)
Atmospheric losses
Rain attenuation losses
10.0
7.0
8.0
10.5
0.5
160.3
0.0
0.0
dBW
dB
dBi
dB
dBW
dB
dB
dB
C/N (Available)
C/N (required due to demod. threshold)
Margin on C/N
S/N (Required for P3 video quality)
C/N0 (Required for P3 quality)
-3.4
7.0
-10.4
25.0
69.3
71.1
dB
dB
dB
dB
dBHz
C/N0 (available)
Margin on C/N0
Link Margin
1.8
dBHz
dB
-10.4
dB
S 3 DFpp C

pw
3
N 2 Bv N 0
2
Antenna noise temperature DO NOT include noise contributions from interfering systems close to the receiving station (e.g.
WiFi access point, microwave ovens, video senders, etc.). A preliminary measurement of G/T is strongly recommended.
Sun-noise measurement at sunrise or sunset should be a convenient method to test RX station figure-of-merit at low
elevations.
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
DVB-S TV from Columbus
Downlink frequency
ISS to E/S range
Value
2.450
1000
Unit
GHz
Km
EARTH STATION CHARACTERISTICS
Antenna diameter
Efficiency
Rx Antenna gain
0.90
50%
24.3
meters
Antenna Noise Temperature
LNB gain
LNB noise figure
LNB equiv noise temp
100
35
0.8
58.7
K
dB
dB
K
158.7
1.9
2.3
K
dB
dB/K
922
188/204
QPSK
1/2
1000
1.35
kbps
FIGURE of MERIT G/T
System Noise Temp
System Noise Figure
G/T
CARRIER CHARACTERISTICS
Data Rate
Reed Solomon
Modulation
FEC
Symbol Rate
Carrier's occupied bandwidth
AMSAT Italia ® -
dBi
kbaud
MHz
TX & Downlink
TX power
cable & connector losses
TX Antenna gain (boresight)
pointing losses
Downlink e.i.r.p. toward earth receive
station
Downlink path loss (free space)
Atmospheric losses
Rain attenuation losses
C/No
C/N
Eb/No (Available)
Eb/No (Required)
Link Margin
10.0
7.0
8.0
10.5
dBW
dB
dBi
dB
0.5
160.3
0.0
0.0
dBW
dB
dB
dB
71.1
9.8
11.4
4.5
dBHz
dB
dB
dB
6.9
dB
Preliminary transmission
parameters based on DVB-S
Television Standard
Dayton Hamvention 2012, May 18-20
Link Margin
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
θ
Pointing losses
θ
AMSAT Italia ® -
POINTING LOSSES
Dayton Hamvention 2012, May 18-20
Video link duration
280 s
Pass over the zenith of a
receiving earth station
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
DOPPLER Effect
Computer simulations by Centro Ricerche
RAI, Torino, show no negative impact due
to Doppler-rate
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
L and S-Band ARISS antennas
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
L and S-Band ARISS antennas
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
L and S-Band ARISS antennas
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
HAMTV transmitter
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
Main modules
MPEG encoder
DVB-S2 modulator
upconverter
P.A.
console
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
On ground receiving station
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
Ground station receiving antenna
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
Ground station pointing system
Example of a mobile receiving
antenna by PRO.SIS.TEL
(Bari)
80-cm dish
0.2° accuracy
complete track 6 s
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
COTS LNBs
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
Earth Station Antenna Noise Temperature
Including interference
100 K
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
TEST-BED at LTG Elettronica
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
First results in IF-LOOP
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
First results in IF-LOOP
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
First results in IF-LOOP
An example of noise level setting, corresponding to (C0+N0)/N0 = 4.2
dB and its effect on video quality, as shown in the image on the right.
FEC = 3/2. This situation was considered to be below the receiver
threshold. The threshold was at about (C0+N0)/N0 = 4.5 dB.
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
First environment measurements
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
Chained Ground Segment
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
25
20
Video contact duration [minutes]
15
10
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25
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25
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15
10
60
Time starting from 1 SEP 2010 00:00:00 [days]
Video contact duration for a 90 days period starting September 1 st, 2010
Chained stations (and antenna diameters):
Blue: (case A) Lisboa (1 m), Milano (1 m), Bucaresti (1 m), Moskva (1 m)
Green: (case B) Tenerife (1m), Lisboa (1m), Milano (1m), Bucaresti (1m), Moskva (1m)
Red: (case C) Lisboa (2.5m), Milano (1m), Bucaresti (1m), Moskva (2.5m)
® Tenerife
Cyan:
(case D)
(2.5m), Lisboa
(1m),Hamvention
Milano (1m), Bucaresti
(2.5m)
AMSAT
Italia
Dayton
2012,(1m),
MayMoskva
18-20
Hand-over among earth stations
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
HAMTV Level Chart
BASIC CONFIGURATION
(Video Format SIF, 1.3 Msymb/s)
Space Segment
GA=8.0 dBi
HAMVIDEO
Encoder, Modulator
& Upconverter
Feeder loss 8.0 dB
Max EIRP = +10.0 dBW
PA
EIRP toward E/S = -0.5 dBW
Ptx = 10.0 dBW
Fre
e-s
pa
16 ce pa
0.1 th
dB loss
2.0 dBW
Link Budget for 1000 km range
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
HAMTV Level Chart
BASIC CONFIGURATION
(Video Format SIF, 1.3 Msymb/s)
Eb
= 6 .7 dB @ 1 .3 Msymb / s
N0
Ground Segment
G A = 25 .0 dBi
T A = 100 K
Antenna pointing losses
1 .0 dB
-136 .6 dBW
Feeder loss 1.0 dB
290 K
- 137 .6 dBW
T rec = 50 .7 K
T sys =225 .9 K
Low -Noise
Downconverter
Kuhne KU LNC 25 TM
NF =0.7 dB G =40 dB
-97 .6 dBW
TV -Sat Line
Amplifier G =20 dB
TV -SAT coax 25 m
Attenuation 6.0 dB
290 K
DVB -S
Receiver
-83 .6 dBW
( -53 .6 dBm )
N 0 =-151 .1 dBW /Hz
C /N 0= 67 .5 dBHz
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
HAMTV
BENCH SIMULATION
Attenuator
A=145.0 dB 300 K
HAMVIDEO
Encoder, Modulator
& Upconverter
Low-Noise
Downconverter
TV-Sat Line
TV-SAT coax 25m
Kuhne KU LNC 25 TM Amplifier G=20 dB
Attenuation 6.0 dB
NF=0.7 dB G=40 dB
290 K
PA
Ptx = 10.0 dBW
-135.0 dBW
Trec=50.7 K
Tsys=428.4 K
-95.0 dBW
-81.0 dBW
(-51.0dBm)
N0=-148.3 dBW/Hz
C/N0=67.3 dBHz
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
DVB-S
Receiver
HAMTV Level Chart
ENHANCED OPERATION with UPGRADED E/S
(Video Format D1, 3.0 Msymb/s)
Eb
= 6 .6 dB @ 3 .0 Msymb/s
N0
Upgraded antenna
( 1 .5 meter dish )
G A = 28 .5 dBi
T A = 100 K
Antenna pointing losses
1 .0 dB
-133 .1dBW
Feeder loss 1.0 dB
290 K
- 134 .1 dBW
T rec = 50 .7 K
T sys =225 .9 K
Low -Noise
Downconverter
Kuhne KU LNC
25 TM
NF =0.7 dB G =40 dB
-94 .1 dBW
TV -Sat Line
Amplifier G =20 dB
TV -SAT coax 25 m
Attenuation 6.0 dB
290 K
DVB -S
Receiver
-80 .1 dBW
( -50 .1 dBm )
N 0 =-151 .1 dBW /Hz
C /N 0= 71 .0 dBHz
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20
THANKS for your attention
AMSAT Italia ® -
Dayton Hamvention 2012, May 18-20