Density evolution and power profile optimization for iterative multiuser decoders based on individually optimum multiuser detectors


Iterative multiuser joint decoding based on exact Belief Propagation (BP) is analyzed in the large system limit by means of the replica method. It is shown that performance can be improved by appropriate power assignment to the users. The optimum power assignment can be found by linear programming in most technically relevant cases. The performance of BP iterative multiuser joint decoding is compared to suboptimum approximations based on Interference Cancellation (IC). While IC receivers show a significant loss for equal-power users, they yield performance close to BP under optimum power assignment.

Divisions: Aston University (General)
Event Title: 40th Annual Allerton Conference on Communications, Control and Computing
Event Type: Other
Event Dates: 2002-10-02 - 2002-10-04
Uncontrolled Keywords: Belief Propagation,Iterative multiuser joint decoding,replica method,optimum power assignment,Interference Cancellation
Last Modified: 08 Jul 2024 08:29
Date Deposited: 11 Sep 2009 15:45
PURE Output Type: Paper
Published Date: 2002-10-04
Authors: Muller, Ralf R.
Giuseppe Caire, Giuseppe
Tanaka, Toshiyuki



Version: Accepted Version

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