Uplink power efficiency of multiuser MIMO with very large antenna arrays

Hien Quoc Ngo, Erik G. Larsson, Thomas L. Marzetta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

62 Citations (Scopus)


A multiplicity of autonomous terminals simultaneously transmits data streams to a compact array of antennas. The array uses imperfect channel-state information derived from transmitted pilots to extract the individual data streams. The power radiated by the terminals can be made inversely proportional to the square-root of the number of base station antennas with no reduction in performance. In contrast if perfect channel-state information were available the power could be made inversely proportional to the number of antennas. A maximum-ratio combining receiver normally performs worse than a zero-forcing receiver. However as power levels are reduced, the cross-talk introduced by the inferior maximum-ratio receiver eventually falls below the noise level and this simple receiver becomes a viable option.
Original languageEnglish
Title of host publicationAllerton Conference on Communication, Control, and Computing
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Publication statusPublished - 03 Jan 2012


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