Uplink pilot and data power control for single cell massive MIMO systems with MRC
2015 (English)In: International Symposium on Wireless Communication Systems (ISWCS), 2015, Institute of Electrical and Electronics Engineers (IEEE), 2015, 396-400 p.Conference paper (Refereed)
This paper considers the jointly optimal pilot and data power allocation in single cell uplink massive MIMO systems. A closed form solution for the optimal length of the training interval is derived. Using the spectral efficiency (SE) as performance metric and setting a total energy budget per coherence interval the power control is formulated as optimization problems for two different objective functions: the minimum SE among the users and the sum SE. The optimal power control policy is found for the case of maximizing the minimum SE by converting it to a geometric program (GP). Since maximizing the sum SE is an NP-hard problem, an efficient algorithm is developed for finding KKT (local maximum) points. Simulation results show the advantage of optimizing the power control over both pilot and data power, as compared to heuristic power control policies.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2015. 396-400 p.
IdentifiersURN: urn:nbn:se:liu:diva-128799DOI: 10.1109/ISWCS.2015.7454371ISBN: 978-146736540-6OAI: oai:DiVA.org:liu-128799DiVA: diva2:932009
2015 International Symposium on Wireless Communication Systems (ISWCS)