Massive MIMO with Optimal Power and Training Duration Allocation
2014 (English)In: IEEE Wireless Communications Letters, ISSN 2162-2337, E-ISSN 2162-2345, Vol. 3, no 6, 605-608 p.Article in journal (Refereed) Published
We consider the uplink of massive multicell multiple-input multiple-output systems, where the base stations (BSs), equipped with massive arrays, serve simultaneously several terminals in the same frequency band. We assume that the BS estimates the channel from uplink training, and then uses the maximum ratio combining technique to detect the signals transmitted from all terminals in its own cell. We propose an optimal resource allocation scheme which jointly selects the training duration,training signal power, and data signal power in order to maximize the sum spectral efficiency, for a given total energy budget spent in a coherence interval. Numerical results verify the benets of the optimal resource allocation scheme. Furthermore, we show that more training signal power should be used at low signal-to-noise ratio(SNRs), and vice versa at high SNRs. Interestingly, for the entire SNR regime, the optimal training duration is equal to the number of terminals.
Place, publisher, year, edition, pages
IEEE , 2014. Vol. 3, no 6, 605-608 p.
Channel estimation, MIMO, Power distribution, Resource management, Signal to noise ratio, Uplink
Communication Systems Signal Processing
IdentifiersURN: urn:nbn:se:liu:diva-112760DOI: 10.1109/LWC.2014.2359220ISI: 000209681700015ScopusID: 2-s2.0-84919821841OAI: oai:DiVA.org:liu-112760DiVA: diva2:771580