Wiki » History » Version 21

AUGER, Anne sophie, 03/22/2015 02:53 PM

1 1 AUGER, Anne sophie
h1. DESIGN OF A TM/TC LINK BETWEEN SMALL AIRCRAFT AND GROUND STATION
2 1 AUGER, Anne sophie
3 20 AUGER, Anne sophie
---
4 20 AUGER, Anne sophie
5 11 AUGER, Anne sophie
h2. WIKI TABLE OF CONTENTS
6 11 AUGER, Anne sophie
7 14 AUGER, Anne sophie
* [[Research of a frequency band]]
8 21 AUGER, Anne sophie
 
9 21 AUGER, Anne sophie
  # Issue of a free band
10 21 AUGER, Anne sophie
  # Request for frequency allocation
11 1 AUGER, Anne sophie
12 14 AUGER, Anne sophie
* [[Other design constraints and variable]] 
13 14 AUGER, Anne sophie
* [[Simulation of performances]]
14 17 AUGER, Anne sophie
* [[Choice of the equipment]]
15 14 AUGER, Anne sophie
16 2 AUGER, Anne sophie
h2. INTRODUCTION
17 2 AUGER, Anne sophie
18 6 AUGER, Anne sophie
The aim of this project is the design of a Telemetry and Telecommand (TM/TC) link between small aircrafts (ie TB20) and an antenna on top of ISAE building. There are different aspects in this work: 
19 2 AUGER, Anne sophie
* regulatory aspects : we must pay for rights of emission on a given frequency band
20 2 AUGER, Anne sophie
* link budget aspects : some parameters can be adjusted to reach the wanted performance
21 6 AUGER, Anne sophie
* flight constraints have to be considered in the choice of the equipment to allow a full time link
22 2 AUGER, Anne sophie
23 18 AUGER, Anne sophie
p=. !Slide1.png!
24 18 AUGER, Anne sophie
25 1 AUGER, Anne sophie
To summarize the system design constraints, we can fill the mission statement below:
26 1 AUGER, Anne sophie
27 9 AUGER, Anne sophie
p=. !figure1.png!
28 1 AUGER, Anne sophie
29 9 AUGER, Anne sophie
In order to define the video bit rate required for our application, knowing the aspect ratio (AR=1,78) quality of the encoded video (L=720p) and its frame cadence (FPS=12), we used the following formula:
30 1 AUGER, Anne sophie
31 9 AUGER, Anne sophie
p=. Bit rate = FPS*5,0692 * L ^1,391^ /(1000*AR) 
32 12 AUGER, Anne sophie
33 12 AUGER, Anne sophie
So 
34 12 AUGER, Anne sophie
35 12 AUGER, Anne sophie
p=. *Bit rate=322 Kbps*
36 12 AUGER, Anne sophie
37 12 AUGER, Anne sophie
As the link will allow data and video transmission, we choose to use the MPEG4 packet format, adapted for multiplexing different nature content. Therefore, we have to consider extra bits due to the encapsulation of data in MPEG4 frames, and we decide to define a bit rate of 500 kbps.
38 12 AUGER, Anne sophie
39 15 AUGER, Anne sophie
h1. BIBLIOGRAFY
40 1 AUGER, Anne sophie
41 16 AUGER, Anne sophie
TNRBF from the ANFR website:
42 17 AUGER, Anne sophie
http://www.anfr.fr/fr/planification-international/tnrbf.html
43 16 AUGER, Anne sophie
http://www.anfr.fr/fileadmin/mediatheque/documents/tnrbf/DR-02_13-Mod4__-_Version_du_8_janvier_2015.pdf
44 16 AUGER, Anne sophie
45 16 AUGER, Anne sophie
MPEG4 standard:
46 16 AUGER, Anne sophie
http://fr.wikipedia.org/wiki/MPEG-4
47 16 AUGER, Anne sophie
48 16 AUGER, Anne sophie
49 1 AUGER, Anne sophie
h1. TEAM MEMBERS
50 1 AUGER, Anne sophie
51 17 AUGER, Anne sophie
*Adrien GAY
52 17 AUGER, Anne sophie
Anne-Sophie AUGER*
53 15 AUGER, Anne sophie
54 15 AUGER, Anne sophie
h1. AKNOWLEDGEMENTS
55 15 AUGER, Anne sophie
56 15 AUGER, Anne sophie
This project was performed with the helpful advice of our supervisors Laurent FRANCK and Eric POQUILLON. We also had the chance to talk with Etienne PERRIN who provided us with technical advice on aeronautical communication and equipments.