Evaluation des techniques de reception multi-antennes dans un systeme DS-CDMA.

摘要

The SA is set to play a significant role in the development of the next-generation wireless communication system. SAs are a new technology for wireless systems that use a fixed set of antenna elements in an array.;The signals from these antenna elements are combined to form a movable beam pattern that can be steered, using either digital signal processing, or RF (Radio Frequency) hardware, to a desired direction that tracks mobile units (pedestrians, cars,) as they move. This allows the SA system to focus the RF resources on a particular subscriber, while minimizing the impact of noise, interference, and other effects that can degrade signal quality.;The challenge lies in two approaches, the first is purely mathematical, called signal processing and the second is purely hardware, called implementation. These two approaches are highly correlated in order to achieve good performance especially in a real time requirements or applications, which is the case.;In short, software and hardware engineers are facing an enormous challenge in designing, developing and implementing a reliable system core combining an efficient Algorithm (Software) with an intelligent Architecture (Hardware) at a moderate cost for the next generation of wireless communications systems. This challenge, this trade-off this future vision, consist the core of our work.;Technological progress has recently changed the introduction of multiple antenna elements at the receiver unit of wireless access points and mobile terminals from a purely theoretical concept to a practical issue in current and future wireless communication systems.