On the Capacity of a Code Division Multiple Access System

We consider multiuser communication on a binary input additive white Gaussian noise channel using Randomly Spread-Code Division Multiple Access. We show concentration of various quantities of the system including the capacity and the free energy. We also obtain a tight upper bound on the capacity of this system in the large user limit which matches with the replica solution. The method is quite general and can be extended to many other multiuser scenarios.


Presented at:
Forty Fifth Allerton Conference on Communication, Control, and Computing, Monticello, Illinois, September 26-28, 2007
Year:
2007
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 Record created 2007-09-07, last modified 2018-03-17

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