A Study on overloaded MIMO wireless systems with virtual channels based on generalized rotation matrices

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06066
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Okayama University
• Principal Investigator: DENNO SATOSHI 岡山大学, 自然科学研究科, 教授 (80378835)
• Research Collaborator: KITAMOTO Akihiro ; Cao Lengchi ; SAWADA Ryosuke ; NAGAI Yuto
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 無線通信 / 物理層 / 過負荷 / MIMO / 非線型信号処理 / 演算量低減

Outline of Final Research Achievements

High speed wireless communication is achieved by increasing the number of transmit signal streams transmitted simultaneously. Actually, it is almost impossible to get the number of the streams more than that of the receive antennas due to prohibitive computational road of the receiver. This research project proposed generalized rotation matrices that make the complexity of the receiver flexible. In fact, the complexity can be reduced to about 1/100 of that of the original receiver by the proposed technique. The proposed technique allows the number of the simultaneously transmit signals to be three times or four times as many as that with conventional receivers. We considered iterative detection combined with the proposed technique to improve the transmission performance. We have proposed a technique to reduce the computational complexity in MIMO physical layer network coding where the number of received signals at the relay is more than that of the receive antennas.

Free Research Field

無線通信における主に物理層の通信理論および信号処理方式