Aspects of Favorable Propagation in Massive MIMO
2014 (English)In: European Signal Processing Conference (EUSIPCO), EURASIP , 2014, 76-80 p.Conference paper (Refereed)
Favorable propagation, dened as mutual orthogonality among the vector-valued channels to the terminals, is one of the key properties of the radio channel that is exploited in Massive MIMO. However, there has been little work that studies this topic in detail. In this paper, we first show that favorable propagation offers the most desirable scenario in terms of maximizing the sum-capacity. One useful proxy for whether propagation is favorable or not is the channel condition number. However, this proxy is not good for the case where the norms of the channel vectors are not equal. For this case, to evaluate how favorable the propagation oered by the channel is, we propose a distance from favorable propagation measure, which is the gap between the sum-capacity and the maximum capacity obtained under favorable propagation. Secondly, we examine how favorable the channels can be for two extreme scenarios: i.i.d. Rayleigh fading and uniform random line-of-sight(UR-LoS). Both environments offer (nearly) favorable propagation. Furthermore, to analyze the UR-LoS model, we propose an urns-and-balls model. This model is simple and explains the singular value spread characteristic of the UR-LoS model well.
Place, publisher, year, edition, pages
EURASIP , 2014. 76-80 p.
, Proceedings of the European Signal Processing Conference, ISSN 2076-1465
Communication Systems Signal Processing
IdentifiersURN: urn:nbn:se:liu:diva-112757ScopusID: 2-s2.0-84911883360ISBN: 978-099286261-9OAI: oai:DiVA.org:liu-112757DiVA: diva2:771577
22nd European Signal Processing Conference, EUSIPCO 2014