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The Space Frontier: Physical Limits of Multiple Antenna Information Transfer

Abstract : In this paper, we study the capacity limits of dense multi-antenna systems. We derive asymptotic capacity expressions for point-to-point and broadcast channels by applying recent tools from random matrix theory. In the case of broadcast channels, we focus on linear precoding techniques. We found that the asymptotic capacity depends only on the ratio be-tween the size of the antenna array and the wavelength. This provides useful guidelines on the achievable limits of information transfer. In particular, it is shown that the to-tal capacity grows unbounded if the transmitter has perfect knowledge of the channel, while the capacity saturates in the absence of channel knowledge at the transmitter. We provide numerical results supporting the theoretical deriva-tions.
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Romain Couillet, Sebastian Wagner, Mérouane Debbah, Alonso Silva. The Space Frontier: Physical Limits of Multiple Antenna Information Transfer. International Conference on Performance Evaluation Methodologies and Tools (ValueTools), Oct 2008, Athens, Greece. ⟨10.4108/ICST.VALUETOOLS2008.4574⟩. ⟨hal-01076465⟩

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