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Interference Cancellation: Better Receivers for a New Wireless MAC
 

Summary: Interference Cancellation: Better Receivers
for a New Wireless MAC
Daniel Halperin
Josephine Ammer
Thomas Anderson
David Wetherall
Abstract
We argue that carrier sense in 802.11 and other wireless
protocols leads to scheduling decisions that are overly
pessimistic and hence waste capacity. As an alternative,
we propose interference cancellation, in which simulta-
neous signals are modeled and decoded together rather
than treating all but one as random noise. This method
greatly expands the conditions under which overlapping
transmissions can be successfully received, even by a sin-
gle receiver. We demonstrate the practicality of these
better receivers via a proof-of-concept experiment with
USRP software radios. We argue that supporting concur-
rent transmissions enables new and more effective wire-
less MACs in which carrier sense is disabled.

  

Source: Anderson, Tom - Department of Computer Science and Engineering, University of Washington at Seattle
Wetherall, David - Department of Computer Science and Engineering, University of Washington at Seattle

 

Collections: Computer Technologies and Information Sciences