2007 Fiscal Year Final Research Report Summary
Research on MIMO Systems for LOS Environments
| Project/Area Number |
18560385
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Keio University |
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Principal Investigator |
OTSUKI Tomoaki Keio University, Faculty of Science and Technology, Associate Professor (10277288)
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| Project Period (FY) |
2006 – 2007
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| Keywords | LOS channels / MIMO / Rice fading / Precoding |
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| Research Abstract |
Multiple-Input Multiple-Output (MIMO) systems that realize high-speed data transmission with multiple antennas at both transmitter and receiver are drawing much attention. In line-of sight (LOS) environments, the performance of MIMO systems depends largely on the difference of the phase difference of direct paths from transmit antennas to each receive antenna. When the phase differences of direct paths are close to each other, the spatial division multiplexing (SDM) channels are not orthogonal to each other so signal detection becomes difficult. In this research, we proposed to two MIMO systems to solve the problems in LOS environments.
1. MIMO system with relative phase difference time-shift modulation (RPDTM)
2. Precoding that maximize minimum distance for MIMO systems
From the results of computer simulation, we showed that the proposed MIMO systems achieve better bit error rate(BER)than the conventional MIMO systems.
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[Journal Article] MIMO System with Relative Phase Difference Time-Shift Modulation for Rician Fading Environment2008
Author(s)
K., Kobayashi, T., Someya, T., Ohtsuki, S., PW. Sigit, T., Kashima
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Journal Title
Trans. of IEICE E91-B, no. 2
Pages: 459-465
Description
「研究成果報告書概要(欧文)」より
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