Control of radio propagation environment using transmit-array for improving performance of wireless communication systems

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630157
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering
• Research Institution: Iwate University
• Principal Investigator: HONMA Naoki 岩手大学, 工学部, 准教授 (70500718)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: MIMO / チャネル容量 / トランスミットアレー / 電波伝搬

Outline of Final Research Achievements

Channel capacity of MIMO (Multiple Input Multiple Output) system strongly depends on the characteristics of the propagation environment, e.g. signal attenuation and keyhole effect. This report describes the results of the study on controlling radio propagation environment using transmit-array for improving performance of wireless communication systems. The passive repeater comprising parasitic array antennas loaded by tunable impedance elements is located in the propagation environment and controls the propagation characteristics to enhance the channel capacity. The measurement of MIMO channel was carried out and showed that the 10 % value of MIMO channel capacity can be improved by 2.52 bits/s/Hz in indoor propagation environment, and this well supports the effectiveness of the proposed method.

Free Research Field

工学