High-throughput and low-overhead non-coherent massive MIMO systems(Fostering Joint International Research)

2020 Fiscal Year Final Research Report

• Project/Area Number: 16KK0120
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering
• Research Institution: The University of Tokyo (2020); Tokyo University of Agriculture and Technology (2016-2017)
• Principal Investigator: Sugiura Shinya 東京大学, 生産技術研究所, 准教授 (30394927)
• Project Period (FY): 2017 – 2020
• Keywords: MIMO / 大規模MIMO / 空間変調 / 理論解析

Outline of Final Research Achievements

There is a shortage of available bandwidth in wireless communications, and it becomes crucial to achieve high performance in the physical layer. In this paper, we present a method to solve the problem of pilot overhead needed for channel estimation and that of power consumption due to RF circuits, which is imposed by a massive multiple-input multiple-output (MIMO) system that uses a massive number of antenna elements at the base station. The benefits of a multi-antenna system configured with a single RF circuit transmitter, called spatial modulation (index modulation), are analytically evaluated on the reduction of power consumption. We also proposed reducing the pilot overhead by utilizing differential encoding and non-coherent detection, as well as semi-blind joint channel estimation and data detection.

Free Research Field

ワイヤレス通信

Academic Significance and Societal Importance of the Research Achievements

本研究では、ワイヤレス通信のスタンダードであるマルチアンテナシステムを対象に、電力消費とパイロットオーバヘッドを削減可能な手法を示し、多面的な評価を行った。このことは、さらなる高周波数利用効率が重要である次世代ワイヤレス通信システムへの適用検討に重要である。今回対象とした信号伝送方式は基本的な技術であるため、実用化時には幅広い通信システムへの波及効果が期待できる。引き続き、本技術の実用化に向けた研究に取り組んでいく。