Blind estimation of effective downlink channel gains in massive MIMO
2015 (English)In: 2015 IEEE International Conference on Acoustics, Speech, and Signal Processing, Proceedings, IEEE , 2015, 2919-2923 p.Conference paper (Refereed)
We consider the massive MIMO downlink with time-division duplex (TDD) operation and conjugate beamforming transmission. To reliably decode the desired signals, the users need to know the effective channel gain. In this paper, we propose a blind channel estimation method which can be applied at the users and which does not require any downlink pilots. We show that our proposed schemecan substantially outperform the case where each user has only statistical channel knowledge, and that the difference in performance is particularly large in certain types of channel, most notably keyhole channels. Compared to schemes that rely on downlink pilots(e.g., ), our proposed scheme yields more accurate channel estimates for a wide range of signal-to-noise ratios and avoid spending time-frequency resources on pilots.
Place, publisher, year, edition, pages
IEEE , 2015. 2919-2923 p.
, International Conference on Acoustics Speech and Signal Processing ICASSP, ISSN 1520-6149
Blind channel estimation, downlink, massive MIMO, time-division duplex
Communication Systems Telecommunications
IdentifiersURN: urn:nbn:se:liu:diva-129072DOI: 10.1109/ICASSP.2015.7178505ISI: 000368452403012ISBN: 978-1-4673-6997-8OAI: oai:DiVA.org:liu-129072DiVA: diva2:935263
40th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)