Hello everyone,
I often meet in scientific articles on MIMO systems the term "rich scattering environment". What exactly is meant by this term?
For example, in the context:
Multi-user MIMO offers big advantages over conventional point-to-point MIMO: it works with cheap single-antenna terminals, a rich scattering environment is not required, and resource allocation is simplified because every active terminal utilizes all of the time-frequency bins.
"Rich scattering environment" generally means that there are many scattering obstacles in an environment that give rise to many propagation paths. For example, an indoor area or a city street canyon is a rich scattering environment because of the many walls, people, vehicles, etc. that scatter radio signals. A low scattering environment would be a field in the countryside, the sky or outer space.
Statistically, "Rich scattering environment" typically results in so-called Rayleigh distribution of observed signal amplitude . Intermediate case is known as Rician fading.
E.g.
Conference Paper Propagation modelling of cellular mobile communication onnon...
Dear Vadim Artyushenko ,
Hope you are well!
In the context of MIMO system means that the the radiation changes directions randomly many times such that the signal becomes orthogonal to the originally transmitted signal coming out of the antenna. It is so that the signal paths through the scattering rich medium will cause the signal transmitted through them to become uncorrelated. It then realizes the multipath diversity.
Best wishes
Rich scattering environment can lead to channel matrices with high rank.
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