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长春光学精密机械与物... [1]
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会议论文 [1]
发表日期
2009 [1]
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Estimation algorithm of mobile OFDM CFOs based on step-size (EI CONFERENCE)
会议论文
2009 International Conference on Information Engineering and Computer Science, ICIECS 2009, December 19, 2009 - December 20, 2009, Wuhan, China
Lin L.
;
Qiao Y.-F.
;
Su W.-X.
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提交时间:2013/03/25
In order to maintain orthogonality among subcarriers for mobile OFDM
a CFOs step-size estimation model is established to avoid severe performance degradation caused by ICI
and algorithmic stability
step-size parameter
the error of CFOs estimate and etc are investigated. First
after an averaging window algorithm is introduced
the mathematic model of step-size estimation algorithm is obtained through step-size parameter and time-varying CFOs. Then
based on the results of MATLAB simulation
the determination of step-size parameter
the advantages of step-size algorithm and precision are discussed. Finally
time sequence plots of added CP
interleaver and subcarrier modulation with VHDL are presented. Experimental results indicate that the maximum of CFOs errors is 0.00987 in 3 variance interval
when mobile velocity is 400 km/h
according with verdicted principle that in order for the ICI effects to be negligible
the error of CFOs estimation must be accurate within 1-2% of the subcarrier spacing
and programs can correctly implement on circuit board. 2009 IEEE.
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