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Identifier

000397127

Title

Software defined radio implementation of IEEE 802.11a physical and MAC layer transceiver on general purpose processors

Alternative Title

Υλοποίηση ενός πομποδέκτη διαμορφούμενου από λογισμικό συμβατού με το φυσικό και MAC επίπεδο του πρωτοκόλλου IEEE 802.11a σε γενικού σκοπού επεξεργαστές

Author

Σουρλίγκας, Εμμανουήλ Κ.

Thesis advisor

Τραγανίτης, Απόστολος

Reviewer

Μπίλας, Άγγελος
Μουχτάρης, Αθανάσιος
Παπαδάκης, Στέφανος

Abstract

Over the last years the number of wirelessly connected devices has exponentially increased, along with the user need in bandwidth. Consequently, new technologies are under development to fulfill the user demands. However, the development and adaption of these new technologies has become a business critical issue. Software Defined Radios (SDRs) provide great flexibility, reconfigurability and cost efficiency, aspects that can contribute to an increased rate of new technologies adaption. However, SDR implementations also introduce challenges, often related with the high computational resources that are required. Realtime performance of high bandwidth systems like IEEE 802.11a can be a challenging task for a software implementation. Towards this goal, this work exploits all the available optimization techniques and technologies including multi-threading and Single Instruction, Multiple Data (SIMD) instructions. In this work we present a fully software implementation of an IEEE 802.11a standard compliant transceiver based on the GNU Radio SDR platform. Going beyond existing previous works, which fell short to provide a unified and fully operational system, our approach provides a realtime IEEE 802.11a Media Access Control (MAC) and physical layer system that can be handled as a normal wireless network interface by the host Operating System. The performance of the system is evaluated both in terms of 802.11a capabilities, as well as in computational resources requirements. The results manifest a quite robust physical layer implementation, which is on par with the best commercial hardware. The MAC layer capacity is only limited by the SDR hardware latencies and the computing demands can be met by many modern CPUs. Moreover many of the optimization techniques and technological or theoretical limitations explored and addressed in this work are quite generic, and may set a road-map for future SDR implementations and new technologies development.

Language

English

Subject

GNU radio

OFDM

SDR

Synchroniazation

Issue date

2014-11-21

Collection

School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses

Type of Work--Post-graduate theses