Antenna Ratio for Sum-Rate Maximization in Full-Duplex Large-Array Base Station with Half-Duplex Multiantenna Users

Kyungsik Min, Sangjoon Park, Youngrok Jang, Taehyoung Kim, Sooyong Choi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

This paper analyzes the ratio of transmit antennas to receive antennas at the base station (BS) in full-duplex multiuser multiple-input-multiple-output (MU-MIMO) systems with large-array BS and half-duplex multiantenna users. We consider a full-duplex BS with a block diagonalization (BD) precoder for downlink transmission and a BD receive filter for uplink reception. We derive the approximated downlink sum-rate considering the inter-user interference, and the uplink sum-rate considering the self-interference (SI), for large numbers of BS antennas. Based on the analysis, we formulate an optimization problem in terms of the ratio of transmit antennas to receive antennas to maximize the sum-rate. The analysis shows that the antenna ratio for maximizing the sum rate converges to the ratio of downlink streams to uplink streams as the number of total BS antennas goes to infinity. Simulation results confirm the analysis and show that the BS using the derived antenna ratio in the full-duplex MU-MIMO system can achieve about a 10∼20 b/s/Hz performance gain compared with the BS using an equal number of transmit and receive antennas.

Original languageEnglish
Article number7428973
Pages (from-to)10168-10173
Number of pages6
JournalIEEE Transactions on Vehicular Technology
Volume65
Issue number12
DOIs
Publication statusPublished - 2016 Dec

All Science Journal Classification (ASJC) codes

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

Fingerprint Dive into the research topics of 'Antenna Ratio for Sum-Rate Maximization in Full-Duplex Large-Array Base Station with Half-Duplex Multiantenna Users'. Together they form a unique fingerprint.

Cite this