The use of relays in uplink MU Massive-MIMO system

Carmen Voicu; Madalina-Georgiana Berceanu; Simona Halunga

doi:10.1117/12.2324866

31 December 2018 The use of relays in uplink MU Massive-MIMO system

Carmen Voicu, Madalina-Georgiana Berceanu, Simona Halunga

Proceedings Volume 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX; 1097722 (2018) https://doi.org/10.1117/12.2324866
Event: Advanced Topics in Optoelectronics, Microelectronics and Nanotechnologies IX, 2018, Constanta, Romania

Abstract

In an uplink multiuser system in which the users are situated far enough from the base station (BS), or in which the communication is affected by fading, the use of relays can bring a plus in the quality of the information arrived at the BS. In this paper, the performance of an uplink connection for a Massive MU-MIMO system is analysed with or without relay nodes in order to see how the bit error rate metric (BER) improves when the number of antennas at the base station (BS) is increased from 10 to 100 and for different number of active users that simultaneously require mobile resources to accomplish their momentary needs. For a better evaluation of the proposed system we use, two types of relays, one based on amplifyand- forward (AF) protocol and one on decode-and-forward (DF) protocol. At the BS a maximal ratio combiner (MRC) is used to combine the signals received from users and relay, and a minimum mean-square error (MMSE) detection is applied to recover the information sent by each user. The simulations show that, by using relays, we have a significant gain, especially when the number of the active users is close with the number of antennas from the base station.

Citation Download Citation

Carmen Voicu, Madalina-Georgiana Berceanu, and Simona Halunga "The use of relays in uplink MU Massive-MIMO system", Proc. SPIE 10977, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies IX, 1097722 (31 December 2018); https://doi.org/10.1117/12.2324866

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