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Réception multi-capteur pour un terminal radio-mobile dans un système d'accès multiple à répartion par codes. Application au mode TDD de l'UMTS.

Abstract : In this PhD thesis, we study the concept of multi-sensor detection in cellular digital radio-communication systems using spread spectrum technique of Code-Division Multiple Access. The parameters considered are those of the third generation of mobile communication systems (UMTS) in the TDD mode and downlink communication. After describing the context in detail, we consider the problem of multi-user multi-sensor detection at mobile, and derive the "theoretical" symbol by symbol linear detectors for the case of frequency selective channels. A proposed frequency representation is used, and some interpretations are given. The performance evaluation is then applied to the case of UMTS channel model, where the bene fit of diversity reception with two or three sensors (at mobile) in efficiently combating fading and interference is shown, together with the advantage of joint "multi-user" detection. The more pragmatic last part addresses the study of digital implementation of the linear detectors, with the objective of fi nding tradeoff s between performance and complexity. To this purpose, we first compare the "free" linear structure with an imposed structure derived from the linear "theoretical" solution with finite length approximation. Finally, we point out the desired features for new intermediate structures, which are next proposed and studied. The adaptive behaviour of these structures in a vehicular environment is also discussed.
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https://tel.archives-ouvertes.fr/tel-00687474
Contributor : Laurent Ros <>
Submitted on : Friday, April 13, 2012 - 11:14:55 AM
Last modification on : Friday, November 6, 2020 - 3:49:56 AM
Long-term archiving on: : Wednesday, December 14, 2016 - 10:27:54 PM

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  • HAL Id : tel-00687474, version 1

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Laurent Ros. Réception multi-capteur pour un terminal radio-mobile dans un système d'accès multiple à répartion par codes. Application au mode TDD de l'UMTS.. Traitement du signal et de l'image [eess.SP]. Institut National Polytechnique de Grenoble - INPG, 2001. Français. ⟨tel-00687474⟩

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