This is a code package is related to the follow scientific article:

Emil Björnson, Özgecan Özdogan, Erik G. Larsson, “Intelligent Reflecting Surface vs. Decode-and-Forward: How Large Surfaces Are Needed to Beat Relaying?,” IEEE Wireless Communications Letters, vol. 9, no. 2, pp. 244-248, February 2020.

The package contains a simulation environment, based on Matlab, that reproduces some of the numerical results and figures in the article. We encourage you to also perform reproducible research!

The rate and energy efficiency of wireless channels can be improved by deploying software-controlled metasurfaces to reflect signals from the source to destination, especially when the direct path is weak. While previous works mainly optimized the reflections, this letter compares the new technology with classic decode-and-forward (DF) relaying. The main observation is that very high rates and/or large metasurfaces are needed to outperform DF relaying, both in terms of minimizing the total transmit power and maximizing the energy efficiency, which also includes the dissipation in the transceiver hardware.

The article contains 3 simulation figures, numbered 2, 4 and 5. simulationFigure2.m generates Figure 2, simulationFigure4.m generates Figures 4(a) and 4(b), and simulationFigure5.m generates Figure 5.

See each file for further documentation.

The paper was supported by ELLIIT and the Swedish Research Council

This code package is licensed under the GPLv2 license. If you in any way use this code for research that results in publications, please cite our original article listed above.