Subspace Estimation and Decomposition for Hybrid Analog-Digital Millimetre-Wave MIMO systems
2015 (English)In: 2015 IEEE 16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), IEEE , 2015, 395-399 p.Conference paper (Refereed)
In this work, we address the problem of channel estimation and precoding / combining for the so-called hybrid millimeter wave (mmWave) MIMO architecture. Our proposed channel estimation scheme exploits channel reciprocity in TDD MIMO systems, by using echoing, thereby allowing us to implement Krylov subspace methods in a fully distributed way. The latter results in estimating the right (resp. left) singular subspace of the channel at the transmitter (resp. receiver). Moreover, we also tackle the problem of subspace decomposition whereby the estimated right (resp. left) singular subspaces are approximated by a cascade of analog and digital precoder (resp. combiner), using an iterative method. Finally we compare our scheme with an equivalent fully digital case and conclude that a relatively similar performance can be achieved, however, with a drastically reduced number of RF chains - 4 ~ 8 times less (i.e., massive savings in cost and power consumption).
Place, publisher, year, edition, pages
IEEE , 2015. 395-399 p.
Telecommunications Signal Processing
IdentifiersURN: urn:nbn:se:kth:diva-176307DOI: 10.1109/SPAWC.2015.7227067ISI: 000380547100080ScopusID: 2-s2.0-84953406441OAI: oai:DiVA.org:kth-176307DiVA: diva2:866569
16th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Stockholm SWEDEN, JUN 28-JUL 01, 2015
QC 201512172015-11-032015-11-032016-09-05Bibliographically approved