The aviation industry stands for about 2% of the global CO2 emissions and constitutes a large portion of what the individual can affect by their own decision making. A direct round-trip Stockholm to New York consumes about 50% of an individual's annual CO2 budget. This paper studies what role carbon offsetting has in the transition towards sustainable aviation. Sustainable aviation fuels (SAFs), electrical aviation and abstaining from flying are also considered as potential approaches to making aviation more sustainable. The research method is both empirical and theoretical. Empirically, a Carbon Offsetting Assessment Framework evaluates airlines’ and online travel agencies’ (OTAs’) work with carbon offsetting and SAF. This is done from a Sweden-centric perspective. The airlines BRA, KLM and SAS score highest. Theoretically, a discussion of the dynamics of the aviation industry’s transition into sustainability is carried out through the multi-level perspective (MLP). Carbon offsetting is considered the best short-term solution for sustainable aviation due to availability and costefficiency. SAF is currently too expensive and the usage too low to yield significant emission reductions but is a promising mid-term solution. In the long-run, electrical aviation is the solution that has the potential to lower direct emissions to almost zero but it relies on major energy storage development and is not commercially viable today. The study also explains why carbon offsetting not should be used as a letter of indulgence but still is a good way to be certain that climate positive actions happen now and not are postponed or not happen at all. / Flygindustrin står för ungefär 2% av de globala CO2-utsläppen och utgör en stor andel av vad individen kan påverka genom sitt eget beslutsfattande. En direktresa tur- och retur Stockholm till New York konsumerar ungefär 50% av en individs ärliga CO2-budget. Den här studien undersöker vilken roll klimatkompensation har i en övergång mot hållbart flyg. Hållbart flygbränsle (SAF), elflyg och att avstå från att flyga har också utvärderats som potentiella tillvägagångssätt för att göra flyget mer hållbart. Studiens forskningsmetod är både empirisk och teoretisk. En modell för att empiriskt utvärdera flygbolags och onlineresebyråers (OTAs) arbete med klimatkompensation och SAF appliceras på en Sverigecentriskt urval av aktörer. Flygbolagen BRA, KLM och SAS får högst poäng. Vidare förs en teoretisk diskussion om dynamiken i flygbranschens övergång mot hållbart flyg genom “the multi-level perspective” (MLP). Klimatkompensation anses vara den bästa kortsiktiga lösningen för hållbart flyg eftersom det är tillgängligt och kostnadseffektivt. SAF är idag för dyrt och användandet för lågt för att resultera i betydelsefulla utsläppsminskningar men är icke desto mindre en lovande teknik på medellång sikt. På lång sikt är elflyg lösningen som har potential att minska direktutsläpp till nästan noll men det står och faller med avsevärd teknikutveckling inom energilagring och är inte kommersiellt tillgängligt idag. Studien förklarar också varför klimatkompensation inte borde användas som ett avlatsbrev men att det fortfarande är ett bra sätt att försäkra sig om att klimatpositiva handlingar sker idag och inte blir uppskjutna eller uteblir.

L’application des règles de concurrence de l’Union européenne au secteur de l’aviation présente un caractère spécial. Les rapprochements des compagnies aériennes sous formes d’alliances ou concentrations sont à première vue indispensables, afin de garantir leur viabilité et mieux desservir les besoins des voyageurs. La pression concurrentielle exercée par les différents moyens de transports et la globalisation des échanges conduisent vers cette voie. Or, la consolidation du marché aérien peut avoir des conséquences néfastes au détriment des consommateurs. Structure oligopolistique, organisation des gros opérateurs en réseaux (hub-and-spoke system), insuffisance des infrastructures, coûts énormes d’exploitation ainsi que protectionnisme au niveau international, constituent des barrières considérables à l’entrée de nouveaux concurrents et peuvent conduire à des pratiques abusives. La transparence tarifaire et les accords de coopération peuvent favoriser les cartels entre transporteurs aériens. La Commission évalue la position des parties et les risques à la concurrence sur des liaisons déterminées (paires de villes). Cette méthode de délimitation du marché pertinent au transport aérien suscite une polémique de la part notamment des compagnies aériennes qui soutiennent une approche fondée sur la concurrence entre réseaux. Ce débat, montre l’évolution du secteur de l’aviation et la nécessité de prendre toujours en compte les nouvelles données. Le maintien d’une concurrence efficace au secteur de l’aviation n’est pas un objectif en soi, mais un instrument de la politique européenne pour la création du « ciel unique européen ». L’intervention des autorités de l’Union européenne au secteur de l’aviation ne se limite pas à une application rigoureuse des règles de concurrence mais vise à éliminer préalablement les phénomènes anticoncurrentiels par l’adoption d’un cadre législatif. / The application of European Union’s competition rules to the aviation sector presents a special character. The rapprochement of air companies either by the formation of alliances or mergers seem to be necessary. Indeed, it can guarantee the existence of a company as well as it serves the needs of travellers. The competitive pressure exercised by the different existing means of transportation and the globalisation of exchanges lead to this behaviour. But this consolidation of the air market can have harmful consequences for consumers. Oligopolistic structures, the hub-and-spoke system, insufficiency of infrastructures, enormous costs of exploitation along with protectionism at an international level, constitute considerable barriers for new competitors and could lead to abusive practices. Tariff transparency and cooperative agreements can furtherer cartels in between air transporters. The Commission assesses the position of the parties and competitive risks on specific routes (city pairs). This method of delimitation of the market for air transport has created a polemic, especially from the airline companies supporting an approach based on competition between networks. This debate shows the evolution of the aviation sector and the necessity of always taking into consideration new data. The upholding of an efficient competition system within the aviation sector is not an objective in itself, but means of European politic for the creation of a “Single European Sky”. The intervention of European authorities within the aviation sector is not limited to a rigorous application of competition rules but aims first at eliminating anticompetitive phenomenon by adopting a legislative framework.

Call number: LD2668 .T4 1986 H44 / Master of Arts / History

Le développement de puissantes compagnies aériennes bénéficiant d’un soutien évident d’acteurs politiques qui ont (re)lancé leurs activités vient poser d’importants défis pour le secteur aérien international. De fait, de nombreuses entités politiques perçoivent le transport aérien comme un outil indispensable afin de promouvoir leurs intérêts et s’imposer davantage sur la scène internationale. Les cas des émirats de Dubaï, d’Abu Dhabi et du Qatar, ainsi que de la Turquie illustrent pleinement la façon dont des acteurs politiques utilisent le développement d’une compagnie aérienne localement basée en fonction d’objectifs qui leur sont propres. La croissance inédite d’Emirates Airline, Etihad Airways, Qatar Airways et Turkish Airlines vient toutefois bouleverser l’évolution de la connectivité aérienne mondiale, tandis que les nombreux acteurs de l’aérien peinent à s’accorder sur la mise en œuvre d’un cadre de portée internationale censé garantir l’existence d’une « concurrence loyale » entre les transporteurs, sur fond d’intérêts divergents. Le contrôle de la connectivité constitue en effet un instrument de soft power qui vient renforcer la position des acteurs qui l’utilisent, tout en créant des liens de/d’(inter)dépendance croissants. Les autorités politiques adoptent toutefois des approches différenciées afin de développer leur soft power, tandis que l’Union européenne s’avère être, pour l’heure, en retrait d’une telle dynamique. / The growth of strong airlines benefiting from a large support of political stakeholders who have (re)launched their activities is leading to important challenges for the international air transport sector. Numerous political entities perceive aviation as an essential tool to promote their interests and to gain more international recognition. The cases of the emirates of Dubai, Abu Dhabi and Qatar, but also Turkey are fully showing how political stakeholders use the development of a locally based airline according to their own goals. The large growth of Emirates Airline, Etihad Airways, Qatar Airways and Turkish Airlines is disrupting the air connectivity evolution at a worldwide scale, while numerous aviation stakeholders do not reach to agree on an international framework aiming to safeguard a “fair competition” between air carriers, in a context of differing interests. Thus, the control of air connectivity forms a soft power instrument strengthening the position of stakeholders who are using it while creating in the meantime growing (inter)dependence links. Political authorities adopt however differentiated approaches in order to expand their soft power, whereas the European Union is, for now, staying away of such a dynamic.

As variáveis que exercem influência em um setor podem torná-lo complexo e imprevisível. A complexidade de um setor, quando existente, é uma característica intrínseca e não pode ser evitada, sendo necessário que a empresa primeiramente compreenda e se adapte a essa complexidade a fim de obter vantagem competitiva frente a seus competidores. A imprevisibilidade também não pode ser evitada, entretanto pode ser também compreendida e atenuada. O setor de aviação é influenciado por diversas variáveis, sejam elas internas ou externas, o que o torna complexo e imprevisível. Principal exemplo de influência interna, a estratégia deve servir como um direcionador a todos dentro de uma organização, para que os objetivos delineados pelos executivos sejam alcançados. A definição da estratégia deve ser seguida de uma exaustiva análise da influência dos agentes externos ao setor, com o objetivo de compreendê-los e assim fazer com que os seus efeitos, quando negativos para a empresa, sejam os menores possíveis. Invariavelmente afetados pelas influências internas ou externas, sejam elas quais forem, estão os custos das companhias, que ao longo dos últimos 90 anos, passaram de um ordinário indicador de controle a uma ferramenta de auxílio às decisões estratégias, por meio da gestão estratégica de custos. No setor aéreo brasileiro, mais especificamente na aviação comercial, os custos passaram a ter maior importância a partir dos primeiros movimentos de desregulamentação do setor, iniciado em novembro de 1991, até a entrada no setor da companhia GOL, que trouxe um novo conceito para o país de gestão de custos, graças à retirada das últimas regulamentações ao controle das tarifas. Esse novo foco em custos iniciou uma nova etapa na competição das companhias aéreas no Brasil e introduziu a experiência de voar a novos passageiros, antes restritos ao transporte rodoviário por causa dos altos custos das passagens aéreas nos anos anteriores. A busca por custos mais baixos é comprovada com os resultados das análises, assim como a existência da diferenciação, principalmente no segmento internacional. O período de 2000 a 2010 foi marcado por diversos acontecimentos no mundo, como guerras, atentados terroristas, crises econômicas mundiais, todos esses com influência nos custos das companhias aéreas brasileiras. As análises de custo unitário demonstram a influência desses fatores, principalmente no custo de combustível, principal componente dos custos das companhias. / The variables that influence a sector can make it complex and unpredictable. The complexity of a sector, where it exists, is an intrinsic feature and cannot be avoided, being necessary for the company to first understand it and adapt it in order to gain competitive advantage against its competitors. The unpredictability cannot be avoided; however it can also be understood and mitigated. The aviation industry is influenced by several variables, whether internal or external, which makes it complex and unpredictable. Prime example of internal influence, the strategy should serve as a guide to all within an organization, so that the goals outlined by the executives are achieved. The definition of the strategy should be followed by an exhaustive analysis of the influence of external agents to the sector, in order to understand them and thus make their effects, while negative for the company, are as small as possible. Invariably affected by internal or external influences, whatever they are, are the costs of companies, which over the past 90 years, went from an ordinary control indicator to a tool to help decision strategies to be made, through strategic cost management. In the Brazilian airline industry, specifically in commercial aviation, the costs have been given greater importance from the first movement of deregulation, initiated in November 1991 until the entry into the industry the company GOL, which brought a new concept for country of management costs, mostly because of the withdrawal of the last regulations to control rates. This new focus on costs started a new stage in the competition of the airlines in Brazil and introduced the experience of flying to new passengers, previously restricted to road transport, because of the high cost of airline tickets in previous years. The constant search for lower costs is evidenced by the analyzes, as well as the existence of differentiation, more specifically in the international segment. The period from 2000 to 2010 was marked by several events in the world such as wars, terrorist attacks, global economic crisis, all of those with influence in the cost of Brazilian airlines. The unit cost analyzes demonstrate the influence of these factors, specially the cost of fuel, the main component of airlines costs.

<p>Detta är en kapacitets- och känslighetsanalys av bagagehanteringssystem vid Arlanda flygplats. Studien är ett examensarbete för civilingenjörsutbildningen Kommunikations- och Transportsystem vid Linköpings universitet och är utförd på uppdrag av Luftfartsverket, LFV Teknik under 2004 och 2005. </p><p>Studien har gjorts med datorstödd simulering som analysverktyg. Studien har gjorts genom att en simuleringsmodell av det studerade systemet har byggts i simuleringsprogrammet Arena. Denna modell har matats med trafikunderlag från en normalvecka under 2004. Utifrån denna modell och utifrån förväntade trafikökningar har sedan ett antal kapacitets- och känslighetsanalysscenarier formulerats och dessa har sedan simulerats och resultaten har tolkats och analyserats samt jämförts med resultaten från grundmodellen. </p><p>Kapacitetsanalysen visar att anläggningen är väl rustad för att ta emot den annalkande trafikökning som förväntas under de närmaste åren, eftersom den ökade trafiken inte innebär några signifikanta problem genom ökat antal väskor som inte hinner med sina flighter. Det som dock kan vara en begränsande faktor är att fickallokeringssystemet inte är effektivt och det sänker anläggningens verkliga kapacitet. För att kunna nyttja anläggningen maximalt bör fickallokeringssystemet ses över. </p><p>Känslighetsanalysen visar att systemet är mycket sårbart för störningar, särskilt om kommunikationen med BSM-centralen går ner eller om en Röntgen Level 2-maskin går sönder. Sådana händelser resulterar i att anläggningens kapacitet minskar kraftigt och i vissa fall klarar anläggningen inte av att hantera dagens trafikmängd. En handlingsplan för hur dessa störningar och konsekvenserna av dem ska minimeras bör införas snarast. </p> / <p>This is a capacity and sensitivity analysis of a baggage handling system at Stockholm-Arlanda airport. The study is a Master's Thesis in Communication and Transport Systems Engineering at the University of Linköping. The study was done on behalf of the Swedish Civil Aviation Administration. The analysis tool that was used is simulation. </p><p>In the study, a simulation model of the baggage handling system was implemented in the simulation program Arena. A base scenario containing the traffic program from one week in 2004 was created and used as a reference scenario. A total of 8 different scenarios were created to form the capacity and sensitivity analyses. </p><p>The capacity analysis showed that the baggage handling system will be able to handle the forecasted increases in traffic over the next few years with relative ease. The X-ray machines are currently not working at anywhere near full capacity. However, the system is currently not being used in an efficient way. The pocket allocation method is far from optimal because flights that use more than one pocket are allocated adjacent pockets only which can be very inefficient. This method needs to be revised for the system to work efficiently. </p><p>The sensitivity analysis showed that the system is very vulnerable if certain things happen. In particular if the communication link with the Baggage Source Message-central in London is lost there will be big problems because all luggage will go to the Manual Encoding Station (MES). The MES will then be very digested and it will take a considerably larger amount of time for the baggage to pass through the system. Problems will also occur if one of the two Level 2 X-ray-machines break down. The remaining machine cannot handle all the baggage by itself, especially not if there are flights to the USA about to depart since baggage heading for the USA must be run through X-ray Level 2. It is strongly recommended that handling plans are formed to minimise the effects of such events.</p>

Detta är en kapacitets- och känslighetsanalys av bagagehanteringssystem vid Arlanda flygplats. Studien är ett examensarbete för civilingenjörsutbildningen Kommunikations- och Transportsystem vid Linköpings universitet och är utförd på uppdrag av Luftfartsverket, LFV Teknik under 2004 och 2005. Studien har gjorts med datorstödd simulering som analysverktyg. Studien har gjorts genom att en simuleringsmodell av det studerade systemet har byggts i simuleringsprogrammet Arena. Denna modell har matats med trafikunderlag från en normalvecka under 2004. Utifrån denna modell och utifrån förväntade trafikökningar har sedan ett antal kapacitets- och känslighetsanalysscenarier formulerats och dessa har sedan simulerats och resultaten har tolkats och analyserats samt jämförts med resultaten från grundmodellen. Kapacitetsanalysen visar att anläggningen är väl rustad för att ta emot den annalkande trafikökning som förväntas under de närmaste åren, eftersom den ökade trafiken inte innebär några signifikanta problem genom ökat antal väskor som inte hinner med sina flighter. Det som dock kan vara en begränsande faktor är att fickallokeringssystemet inte är effektivt och det sänker anläggningens verkliga kapacitet. För att kunna nyttja anläggningen maximalt bör fickallokeringssystemet ses över. Känslighetsanalysen visar att systemet är mycket sårbart för störningar, särskilt om kommunikationen med BSM-centralen går ner eller om en Röntgen Level 2-maskin går sönder. Sådana händelser resulterar i att anläggningens kapacitet minskar kraftigt och i vissa fall klarar anläggningen inte av att hantera dagens trafikmängd. En handlingsplan för hur dessa störningar och konsekvenserna av dem ska minimeras bör införas snarast. / This is a capacity and sensitivity analysis of a baggage handling system at Stockholm-Arlanda airport. The study is a Master's Thesis in Communication and Transport Systems Engineering at the University of Linköping. The study was done on behalf of the Swedish Civil Aviation Administration. The analysis tool that was used is simulation. In the study, a simulation model of the baggage handling system was implemented in the simulation program Arena. A base scenario containing the traffic program from one week in 2004 was created and used as a reference scenario. A total of 8 different scenarios were created to form the capacity and sensitivity analyses. The capacity analysis showed that the baggage handling system will be able to handle the forecasted increases in traffic over the next few years with relative ease. The X-ray machines are currently not working at anywhere near full capacity. However, the system is currently not being used in an efficient way. The pocket allocation method is far from optimal because flights that use more than one pocket are allocated adjacent pockets only which can be very inefficient. This method needs to be revised for the system to work efficiently. The sensitivity analysis showed that the system is very vulnerable if certain things happen. In particular if the communication link with the Baggage Source Message-central in London is lost there will be big problems because all luggage will go to the Manual Encoding Station (MES). The MES will then be very digested and it will take a considerably larger amount of time for the baggage to pass through the system. Problems will also occur if one of the two Level 2 X-ray-machines break down. The remaining machine cannot handle all the baggage by itself, especially not if there are flights to the USA about to depart since baggage heading for the USA must be run through X-ray Level 2. It is strongly recommended that handling plans are formed to minimise the effects of such events.

No description available.

Made available in DSpace on 2009-11-18T19:00:50Z (GMT). No. of bitstreams: 1 Maryana-Kuzmina.pdf: 444000 bytes, checksum: 32161672bcd7120007547cd7d391f7ce (MD5) Previous issue date: 2007 / The present study is focused on the analysis of the three main governmental measures occurred in 2000-2006 in Russian defense industry: the creation of the holding structures, the establishing of the state monopoly in arms export, and creation of the United Aviation Construction Corporation (Ob¿edinennaya Aviastroitel¿naya Corporatziya), which was initiated by the President and Government of Russian Federation in 2006. The last project assumes the consolidation and joining of all producers of civil and military aviation into one united corporation in order to save the technological and productive potential of the sector after serious crisis in 1990-s. On the other hand, this project can be considered as one of the measures to establish state control and hierarchy in the defense industry. The current project tries to analyze the necessity and the possible impacts of restructuring processes. In order to perform such analysis, I need to observe the evolution of the sector, which involves the description of the restructuring and reforming of the industry since the disintegration of the Soviet Union. The current situation in aviation sector was shaped by number of reforms performed by Government of Russian Federation, which I describe in phases: conversion, privatization, decentralization, followed by evident desire of the state to establish control over some companies. Later on, I am trying to understand the reasons lying behind all reforms of 2000-2006 and the integration of the industry. I also try to predict which impacts on the companies it will have. The last part presents the main conclusions of the paper.

Cette thèse étudie l'intérêt des architectures SDR à échantillonnage direct pour des récepteurs Galileo dans le contexte particulier de l'Aviation Civile, caractérisé notamment par une exigence de robustesse à des interférences bien spécifiées, principalement les interférences causées par les signaux DME ou CW. Le concept de Software Defined Radio traduit la migration toujours plus grande, au sein des récepteurs, des procédés de démodulation d'une technologie analogique à du traitement numérique, donc de façon logicielle. La quasi généralisation de ce choix de conception dans les architectures nouvelles nous a conduit à le considérer comme acquis dans notre travail. La méthode d'échantillonnage direct, ou Direct Sampling, quant à elle consiste à numériser les signaux le plus près possible de l'antenne, typiquement derrière le LNA et les filtres RF associés. Cette technique s'affranchit donc de toute conversion en fréquence intermédiaire, utilisant autant que possible le principe de l'échantillonnage passe-bande afin de minimiser la fréquence d'échantillonnage et en conséquence les coûts calculatoires ultérieurs. De plus cette thèse s'est proposée de pousser jusqu'au bout la simplification analogique en renonçant également à l'utilisation de l'AGC analogique qui équipe les récepteurs de conception traditionnelle. Seuls des amplificateurs à gain fixe précéderont l'ADC. Ce mémoire rend compte des travaux menés pour déterminer si ces choix peuvent s'appliquer aux récepteurs Galileo multifréquences (signaux E5a et E1) destinés à l'Aviation Civile. La structure du document reflète la démarche qui a été la notre durant cette thèse et qui a consisté à partir de l'antenne pour, d'étape en étape, aboutir au signal numérique traité par la partie SDR. Après une introduction détaillant le problème posé et le contexte dans lequel il s'inscrit, le deuxième chapitre étudie les exigences de robustesse aux interférences auquel doit se soumettre un récepteur de navigation par satellites destiné à l'Aviation Civile. Il s'agit de la base qui conditionne toute la démarche à suivre. Le troisième chapitre est consacré au calcul des fréquences d'échantillonnage. Deux architectures d'échantillonnage sont proposées. La première met en oeuvre un échantillonnage cohérent des deux bandes E5a et E1 tandis que la seconde implémente un échantillonnage séparé. Dans les deux cas, la nécessité de filtres RF supplémentaires précédant l'échantillonnage est mise en évidence. L'atténuation minimale que doivent apporter ces filtres est spécifiée. Ces spécifications sont suffisamment dures pour qu'il ait été jugé indispensable d'effectuer une étude de faisabilité. C'est l'objet du chapitre quatre où une approche expérimentale à base d'un composant disponible sur étagère a été menée. La problématique de la gigue de l'horloge d'échantillonnage, incontournable ici eu égard à la haute fréquence des signaux à numériser, est étudiée dans le chapitre cinq. Des résultats de simulation sont présentés et un dimensionnement de la qualité de l'horloge d'échantillonnage est proposé. Dans le chapitre six, la quantification, second volet de la numérisation, est détaillée. Il s'agit très précisément du calcul du nombre minimum de bits de quantification que doit exhiber l'ADC pour représenter toute la dynamique, non seulement du signal utile mais aussi des interférences potentielles. Au vu des débits de données conséquents mis en évidence dans les chapitres trois et six, le chapitre sept évalue la possibilité de réduire la dynamique de codage du signal à l'aide de fonctions de compression. Le dernier chapitre est focalisé sur la séparation numérique des bandes E5a et E1 dans l'architecture à échantillonnage cohérent introduite au chapitre deux. Ici aussi l'atténuation minimale que doivent apporter les filtres requis est spécifiée. / This thesis studies the relevance of DS SDR architectures applied to Galileo receivers in the specific context of Civil Aviation, characterized in particular by strict requirements of robustness to interference, in particular, interference caused by DME or CW signals. The Software Defined Radio concept renders the major tendency, inside the receiver, to move the demodulation part from an analog technology to digital signal processing, that is software. The choice of this kind of design is nearly generalized in new receiver architectures so it was considered the case in this work. The Direct Sampling method consists in digitizing the signal as close as possible to the antenna, typically after the LNA and the associated RF bandpass filter. So this technique does not use any conversion to an intermediate frequency, using as much as possible the bandpass sampling principle in order to minimize the sampling frequency and consequently the downstream computational costs. What is more, this thesis aiming at the greatest simplification of the analog part of the receiver, the decision was made to suppress the analog AGC which equips the receivers of classical architecture. Only fixed gained amplifiers should precede the ADC. This document exposes the work done to determine if these choices can apply to a multifrequency (E5a and E1 signals) Galileo receiver intended for a Civil Aviation use. The structure of the document reflects the approach used during this thesis. It progresses step by step from the antenna down to the digital signal, to be processed then by the SDR part. After an introduction detailing the problem to study and its context, the second chapter investigates the Civil Aviation requirements of robustness to interference a satellite navigation receiver must comply with. It is the basis which completely conditions the design process. The third chapter is devoted to the determination of the sampling frequency. Two sampling architectures are proposed: the first implements coherent sampling of the two E5a and E1 bands while the second uses separate sampling. In both cases the necessity to use extra RF filters is shown. The minimum attenuation to be provided by these filters is also specified. These requirements are strong enough to justify a feasibility investigation. It is the subject of chapter four where an experimental study, based on a SAW filter chip available on the shelf, is related. The issue of the sampling clock jitter, of concern with the Direct Sampling technique because of the high frequency of the signal to digitize, is investigated in chapter five. Some simulation results are presented and a dimensioning of the quality of the sampling clock is proposed. In chapter six, quantization, a byproduct of digitization, is detailed. Precisely it is the calculation of the number of bits the ADC must have to digitally represent the whole dynamic of, not only the useful signal, but also of the potential interference. Considering the high binary throughput highlighted in chapters three and six, chapter seven evaluates the possibility to reduce the coding dynamic of the digital signal at the output of the ADC by means of compression functions. The last chapter is focused on the digital separation of the two E5a and E1 bands in the coherent sampling architecture presented in chapter two. Here also specifications of minimum attenuation are given. Lastly the conclusions synthesize the contributions of this thesis and proposes ideas for future work to enrich them and more generally the subject of DS-SDR Galileo receivers for Civil Aviation.