Multi-layer precoding for full-dimensional massive MIMO systems

A. Alkhateeb, Geert Leus, R.W. Heath

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

15 Citations (Scopus)


Full-dimensional massive multiple-input multiple-output (MIMO) systems boost sum spectral efficiency by offering orders of magnitude increase in multiplexing gains. In time division duplexing systems, however, the reuse of the uplink training pilots among cells results in channel estimation errors, which lead to downlink inter-cell interference, especially for cell-edge users, even with large numbers of antennas. Handling this interference with conventional network MIMO techniques is challenging due to the high channel dimensionality. Further, large antenna precoding and combining implementation is associated with high hardware complexity. In this paper, we propose multi-layer precoding to enable efficient and low complexity full-dimensional MIMO operation. Multi-layer precoding (i) leverages the directional characteristics of large-scale MIMO channels to manage inter-cell interference with low channel requirements, and (ii) allows for an efficient implementation using low-complexity hybrid analog/digital architectures. We present and evaluate a specific multi-layer precoding design for full-dimensional MIMO systems. Simulation results show the potential gains of multi-layer precoding compared with traditional pilot-contaminated massive MIMO setups despite the low channel knowledge requirements and the low-complexity implementation.

Original languageEnglish
Title of host publicationConference Record of the 48th Asilomar Conference on Signals, Systems and Computers
EditorsM.B. Matthews
Place of PublicationPiscataway, NJ
PublisherIEEE Society
Number of pages5
ISBN (Electronic)978-1-4799-8297-4
ISBN (Print)978-1-4799-8295-0
Publication statusPublished - Nov 2014
Event48th Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States
Duration: 2 Nov 20145 Nov 2014
Conference number: 48


Conference48th Asilomar Conference on Signals, Systems and Computers
Country/TerritoryUnited States
CityPacific Grove, CA


  • Interference
  • MIMO
  • Covariance matrices
  • Uplink
  • Downlink
  • Antenna arrays


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