| Project/Area Number |
16560346
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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 | Tokyo University of Science |
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Principal Investigator |
ITAMI Makoto Tokyo University of Science, Faculty of Industrial Science Technology, Associate Professor, 基礎工学部, 助教授 (70212983)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2004: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | OFDM / MIMO / Pre-Coding / Channel Estimation / Inter Carrier Interference / Simplification / Channel Model / Iterative Decoding / 適応除去 / 移動通信 / ドップラーシフト / 同期 / 送信ダイバーシティ |
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| Research Abstract |
MIMO Transmission technique is very effective in OFDM systems. However, influence of channel Doppler spread under mobile reception is more severe in MIMO-OFDM. In this research, the scheme to reduce inter carrier interference generated by channel Doppler spread is. In this scheme, the channel characteristics is estimated using pilot symbols based on the Doppler spread channel model and influence of inter-carrier interference is reduced using the estimated channel characteristics. Moreover, by combining the pre-coding scheme with MIMO transmission, the influence of channel characteristics can be improved further. As for the improvement of pre-coding scheme, iterative decoding scheme is also prcposed and it made possible to improve performance and reduce complexily. The performance of the proposed scheme was examined by simulations. As the result, good performance was confirmed. In the further researches, the scheme to improve the performance further under more actual reception situations. And simplification of the hardware is also studied.
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