71 research outputs found
Simplified Compute-and-Forward and Its Performance Analysis
The compute-and-forward (CMF) method has shown a great promise as an
innovative approach to exploit interference toward achieving higher network
throughput. The CMF was primarily introduced by means of information theory
tools. While there have been some recent works discussing different aspects of
efficient and practical implementation of CMF, there are still some issues that
are not covered. In this paper, we first introduce a method to decrease the
implementation complexity of the CMF method. We then evaluate the exact outage
probability of our proposed simplified CMF scheme, and hereby provide an upper
bound on the outage probability of the optimum CMF in all SNR values, and a
close approximation of its outage probability in low SNR regimes. We also
evaluate the effect of the channel estimation error (CEE) on the performance of
both optimum and our proposed simplified CMF by simulations. Our simulation
results indicate that the proposed method is more robust against CEE than the
optimum CMF method for the examples considered.Comment: Submitted to IET Communications, 29 pages, 7 figures, 1 table, latex,
The authors are with the Wireless Research Laboratory (WRL), Department of
Electrical Engineering, Sharif University of Technology, Tehran, Ira
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