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Cell-Free Massive MIMO: Uniformly great service for everyone
Open accessAbstract
We consider the downlink of Cell-Free Massive MIMO systems, where a very large number of distributed access points (APs) simultaneously serve a much smaller number of users. Each AP uses local channel estimates obtained from received uplink pilots and applies conjugate beamforming to transmit data to the users. We derive a closed-form expression for the achievable rate. This expression enables us to design an optimal max-min power control scheme that gives equal quality of service to all users. We further compare the performance of the Cell-Free Massive MIMO system to that of a conventional small-cell network and show that the throughput of the Cell-Free system is much more concentrated around its median compared to that of the smallcell system. The Cell-Free Massive MIMO system can provide an almost 20-fold increase in 95%-likely per-user throughput, compared with the small-cell system. Furthermore, Cell-Free systems are more robust to shadow fading correlation than smallcell systems.
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Boyd, S., & Vandenberghe, L. (2004) · doi:10.1017/cbo9780511804441 · Cited by 56,601
Fundamentals of Wireless Communication
Tse, D., & Viswanath, P. (2005) · doi:10.1017/cbo9780511807213 · Cited by 13,162
Cited by
Cell-Free Massive MIMO Versus Small Cells
Ngo, H. Q., Ashikhmin, A., Yang, H., Larsson, E. G., & Marzetta, T. L. (2017) · IEEE Transactions on Wireless Communications · doi:10.1109/twc.2017.2655515 · Cited by 2,757
Self-citationCell-Free Massive MIMO: User-Centric Approach
Buzzi, S., & D'Andrea, C. (2017) · IEEE Wireless Communications Letters · doi:10.1109/lwc.2017.2734893 · Cited by 513
Buzzi, S., D'Andrea, C., Zappone, A., & D'Elia, C. (2020) · IEEE Transactions on Wireless Communications · doi:10.1109/twc.2019.2952117 · Cited by 348
Algorithm-Unrolling-Based Distributed Optimization for RIS-Assisted Cell-Free Networks
Xu, W., An, J., Li, H., Gan, L., & Yuen, C. (2024) · IEEE Internet of Things Journal · doi:10.1109/jiot.2023.3288072 · Cited by 49
Metadata
- Authors
- Ngo, H. Q., Ashikhmin, A., Yang, H., Larsson, E. G., & Marzetta, T. L.
- Venue
- 2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
- Publisher
- IEEE
- Published
- 2015-06
- Pages
- 201-205
- OpenAlex
- W1540562499
- Cited by
- 417
- References
- 2
- FWCI
- 22.35
- Type
- conference paper
- Language
- en
- Open access
- green
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- Ngo, H. Q., Ashikhmin, A., Yang, H., Larsson, E. G., & Marzetta, T. L. (2015). Cell-Free Massive MIMO: Uniformly great service for everyone. 2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC). https://doi.org/10.1109/spawc.2015.7227028
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