An Efficient Constrained mm-Wave Hybrid Massive MIMO Beamforming for JSDM based NOMA


Bayraktar M., GÜVENSEN G. M.

IEEE International Conference on Communications (ICC), ELECTR NETWORK, 14 - 23 June 2021 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/icc42927.2021.9500394
  • Country: ELECTR NETWORK
  • Keywords: code-domain NOMA, mm-wave, massive MIMO, alternating minimization, hybrid beamforming

Abstract

Massive MIMO and non-orthogonal multiple access (NOMA) are key technologies for next generation wireless systems due to their distinct advantages. We previously proposed a general framework on unification of code-domain NOMA and joint spatial division and multiplexing (JSDM) which is a spatial user-grouping based hybrid beamforming method for massive MIMO. In this paper, we propose a constrained analog beamformer design for JSDM based systems. Moreover, we propose joint group processing for the digital beamformer in order to reduce the interference introduced by constrained beamformers. We provide a comprehensive performance evaluation for different operational modes of JSDM with code-domain NOMA when constrained analog beamformers are utilized.