Wiki » History » Version 16
Version 15 (AUGER, Anne sophie, 03/22/2015 12:06 PM) → Version 16/55 (AUGER, Anne sophie, 03/22/2015 12:13 PM)
h1. DESIGN OF A TM/TC LINK BETWEEN SMALL AIRCRAFT AND GROUND STATION
h2. WIKI TABLE OF CONTENTS
* [[Research of a frequency band]]
> # Issue of a free band
> # Request for frequency allocation
* [[Other design constraints and variable]]
* [[Simulation of performances]]
h2. INTRODUCTION
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:
* regulatory aspects : we must pay for rights of emission on a given frequency band
* link budget aspects : some parameters can be adjusted to reach the wanted performance
* flight constraints have to be considered in the choice of the equipment to allow a full time link
To summarize the system design constraints, we can fill the mission statement below:
p=. !figure1.png!
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:
p=. Bit rate = FPS*5,0692 * L ^1,391^ /(1000*AR)
So
p=. *Bit rate=322 Kbps*
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.
h1. BIBLIOGRAFY
TNRBF from the ANFR website:
http://www.anfr.fr/fileadmin/mediatheque/documents/tnrbf/DR-02_13-Mod4__-_Version_du_8_janvier_2015.pdf
MPEG4 standard:
http://fr.wikipedia.org/wiki/MPEG-4
h1. TEAM MEMBERS
Adrien GAY
Anne-Sophie AUGER
h1. AKNOWLEDGEMENTS
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.
h2. WIKI TABLE OF CONTENTS
* [[Research of a frequency band]]
> # Issue of a free band
> # Request for frequency allocation
* [[Other design constraints and variable]]
* [[Simulation of performances]]
h2. INTRODUCTION
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:
* regulatory aspects : we must pay for rights of emission on a given frequency band
* link budget aspects : some parameters can be adjusted to reach the wanted performance
* flight constraints have to be considered in the choice of the equipment to allow a full time link
To summarize the system design constraints, we can fill the mission statement below:
p=. !figure1.png!
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:
p=. Bit rate = FPS*5,0692 * L ^1,391^ /(1000*AR)
So
p=. *Bit rate=322 Kbps*
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.
h1. BIBLIOGRAFY
TNRBF from the ANFR website:
http://www.anfr.fr/fileadmin/mediatheque/documents/tnrbf/DR-02_13-Mod4__-_Version_du_8_janvier_2015.pdf
MPEG4 standard:
http://fr.wikipedia.org/wiki/MPEG-4
h1. TEAM MEMBERS
Adrien GAY
Anne-Sophie AUGER
h1. AKNOWLEDGEMENTS
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.