1-Bit Massive MIMO Downlink Based on Constructive Interference
Skip to main content
eScholarship
Open Access Publications from the University of California

1-Bit Massive MIMO Downlink Based on Constructive Interference

  • Author(s): Li, Ang
  • Masouros, Christos
  • Swindlehurst, A Lee
  • IEEE
  • et al.
Creative Commons Attribution 4.0 International Public License
Abstract

In this paper, we focus on the multiuser massive multiple-input single-output (MISO) downlink with low-cost 1-bit digital-to-analog converters (DACs) for PSK modulation, and propose a low-complexity refinement process that is applicable to any existing 1-bit precoding approaches based on the constructive interference (CI) formulation. With the decomposition of the signals along the detection thresholds, we first formulate a simple symbol-scaling method as the performance metric. The low-complexity refinement approach is subsequently introduced, where we aim to improve the introduced symbol-scaling performance metric by modifying the transmit signal on one antenna at a time. Numerical results validate the effectiveness of the proposed refinement method on existing approaches for massive MIMO with 1-bit DACs, and the performance improvements are most significant for the low-complexity quantized zero-forcing (ZF) method.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View