Transmit Diversity Schemes for Spacial Multiplexing MIMO-OFDM Systems

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560475
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Chiba Institute of Technology
• Principal Investigator: SABA Takahiko 千葉工業大学, 情報科学部, 教授 (60293742)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: MIMO / OFDM / 空間多重 / ダイバーシチ

Outline of Final Research Achievements

In this research, we have studied a transmission scheme to obtain a diversity gain in orthogonal frequency division multiplexing (OFDM) systems using spatial multiplexing (SM) transmission. We have proposed mutual superposition transmission (MST) in order to realize reliable SM-OFDM systems without reducing the transmission speed. In addition, we have proposed modified MST (MMST) to reduce the computational complexity required for demodulation. In the proposed MST, two data symbols of two different subcarriers are mutually superposed on respective subcarriers after being weighted. Since each of superposed symbols contains two data symbols and is transmitted on each subcarrier, a diversity gain is obtained at a receiver. As a result, we have demonstrated that the proposed MST and MMST achieve reliable SM transmission without reducing the transmission speed.

Free Research Field

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