Pilot Assignment in Cell-Free Massive MIMO Based on the Hungarian Algorithm
Copyright policy )Pilot Assignment in Cell-Free Massive MIMO Based on the Hungarian Algorithm
This letter focuses on the problem of pilot assignment in cell-free massive MIMO systems. Exploiting the well-known Hungarian algorithms, two procedures are proposed, one maximizing the system throughput, and the other one maximizing the fairness across users. The algorithms operate based on the knowledge of large-scale fading coefficients as a proxy for the distances between users in the system and take into account both the uplink and downlink performance. Numerical results show that the proposed pilot assignment algorithms are effective and outperform the many competing alternatives available in the literature.
4 pages, 4 figures, IEEE Wireless Communications Letters
- University of Cassino and Southern Lazio Italy
- Huawei Technologies (China) China (People's Republic of)
- Consorzio Nazionale Interuniversitario per le Telecomunicazioni Italy
Signal Processing (eess.SP), FOS: Computer and information sciences, Computer Science - Information Theory, Information Theory (cs.IT), FOS: Electrical engineering, electronic engineering, information engineering, 6G; B5G; Cell-free; Hungarian algorithm; massive MIMO; pilot assignment; wireless networks, Electrical Engineering and Systems Science - Signal Processing
Signal Processing (eess.SP), FOS: Computer and information sciences, Computer Science - Information Theory, Information Theory (cs.IT), FOS: Electrical engineering, electronic engineering, information engineering, 6G; B5G; Cell-free; Hungarian algorithm; massive MIMO; pilot assignment; wireless networks, Electrical Engineering and Systems Science - Signal Processing
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