| Project/Area Number |
21560407
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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 | Osaka Prefecture University |
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Principal Investigator |
YAMASHITA Katsumi 大阪府立大学, 工学(系)研究科(研究院), 教授 (60158152)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | OFDM通信 / DCR方式 / 周波数補正 / 直流オフセット補正 / I/Q不均衡補正 / OFDM通信方式 / 時変直流オフセット / CFO補正 / I / Q不均衡補正 |
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| Research Abstract |
Orthogonal frequency division multiplexing(OFDM) has been adopted in many wireless communication systems. OFDM is known for its sensitivity to carrier frequency offset(CFO). Since the CFO destroys the orthogonality among subcarriers, the resulting inter-carrier interference(ICI) leads to severe performance degradation.
On the other hand, direct-conversion receiver(DCR) has attracted a lot of attention in recent years, for its smaller size and lower cost. However, the price is the additional disturbances, such as DC offset(DCO), I/Q imbalance. Obviously, the coexistence of the CFO and DCO is a critical problem in an OFDM DCR. In order to improve bit error ratio performance in the presence of analog impairments, a novel joint estimated method of CFO, DCO and I/Q imbalance were proposed.
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