@ARTICLE {33335,
author={D.  Matos and R.  Correia and H. T. P. Silva Silva and H.  Silva and A. Oliveira and N.B.C. Carvalho},
doi={10.1109/LMWC.2022.3196587},
journal={IEEE Microwave and Wireless Technology Letters},
title={On the Performance of Square, Rectangular, Star, and Hexagonal QAM for Backscatter Systems},
year={2023},
month={January},
volume={33},
number={1},
pages={102-105},
ISSN={2771-957X}
}