Abstract
We consider a wide-band ad-hoc network with coherent
radios in a slow-fading environment, and we analyze the
performance of different physical layer (PHY) and medium
access (MAC) schemes in such a network. Most of the
existing analysis assume that PHY is based on a nearest
neighborhood decoding, which is not optimal in this case.
Instead, we focus on MLE detector. We show that, since
some of the interference is mitigated by the MLE
detector, the network design paradigm changes
significantly: a non-coordinated PHY and MAC, in addition
to a low complexity, exhibit better performance than more
complex coordinated, currently used PHY and MAC schemes.
Our results suggest that most of the complexity should be
invested in a receiver design instead of intricate MAC or
signaling protocols. We also present a novel algorithm,
using Monte-Carlo method, to calculate bounds on the
rates that can be achieved with MLE detector.
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