[1] Jiang Yanxiang, You Xiaohu, Gao Xiqi,. Polynomial rooting based frequency offset estimationfor MIMO OFDM systems [J]. Journal of Southeast University (English Edition), 2008, 24 (4): 397-401. [doi:10.3969/j.issn.1003-7985.2008.04.001]

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Polynomial rooting based frequency offset estimationfor MIMO OFDM systems()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 4

Page:

397-401

Research Field:

Information and Communication Engineering

Publishing date:

2008-12-30

Info

Title:

Polynomial rooting based frequency offset estimationfor MIMO OFDM systems

Author(s):

Jiang Yanxiang;  You Xiaohu;  Gao Xiqi

National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Keywords:

MIMO OFDM;  frequency selective fading channels;  frequency offset estimation;  polynomial rooting

PACS:

TN91

DOI:

10.3969/j.issn.1003-7985.2008.04.001

Abstract:

Based on the frequency domain training sequences, the polynomial-based carrier frequency offset(CFO)estimation in multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM)systems is extensively investigated.By designing the training sequences to meet certain conditions and exploiting the Hermitian and real symmetric properties of the corresponding matrices, it is found that the roots of the polynomials corresponding to the cost functions are pairwise and that both integer CFO and fractional CFO can be estimated by the direct polynomial rooting approach.By analyzing the polynomials corresponding to the cost functions and their derivatives, it is shown that they have a common polynomial factor and the former can be expressed in a quadratic form of the common polynomial factor.Analytical results further reveal that the derivative polynomial rooting approach is equivalent to the direct one in estimation at the same signal-to-noise ratio(SNR)value and that the latter is superior to the former in complexity.Simulation results agree well with analytical results.

References:

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Memo

Memo:

Biographies: Jiang Yanxiang(1977—), male, doctor, lecturer, yxjiang@seu.edu.cn;You Xiaohu(1962—), male, doctor, professor, xhyu@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.60702028), the National High Technology Research and Development Program of China(863 Program)(No.2007AA01Z268).
Citation: Jiang Yanxiang, You Xiaohu, Gao Xiqi.Polynomial rooting based frequency offset estimation for MIMO OFDM systems[J].Journal of Southeast University(English Edition), 2008, 24(4):397-401.

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