Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems
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- SHEN Chih-Chang
- Department of Information Technology, Ling Tung University
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- CHANG Ann-Chen
- Department of Information Technology, Ling Tung University
Abstract
This paper deals with carrier frequency offset (CFO) estimation based on the minimum variance distortionless response (MVDR) criterion without using specific training sequences for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. In the presence of large CFOs, the estimator is proposed to find a new CFO vector based on the first-order Taylor series expansion of the one initially given. The problem of finding the new CFO vector is formulated as the closed form of a generalized eigenvalue problem, which allows one to readily solve it. Since raising the accuracy of residual CFO estimation can provide more accurate residual CFO compensation, this paper also present a decision-directed MVDR approach to improve the CFO estimation performance. However, the proposed estimator can estimate CFOs with less computation load. Several computer simulation results are provided for illustrating the effectiveness of the proposed blind estimate approach.
Journal
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- IEICE Transactions on Communications
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IEICE Transactions on Communications E97.B (1), 137-145, 2014
The Institute of Electronics, Information and Communication Engineers
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Details 詳細情報について
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- CRID
- 1390282679353392000
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- NII Article ID
- 130003385172
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- ISSN
- 17451345
- 09168516
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed