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长春光学精密机械与物... [1]
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会议论文 [1]
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2008 [1]
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发表日期:2008
专题:长春光学精密机械与物理研究所
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Correction method for detection of the frequencies of railway fsk signals (EI CONFERENCE)
会议论文
2008 9th International Conference on Signal Processing, ICSP 2008, October 26, 2008 - October 29, 2008, Beijing, China
Xuguang Y.
;
Yu J.
;
Xifeng Z.
;
Tiefu D.
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提交时间:2013/03/25
In order to acquire the information of railway binary frequency-shift keying signals
which include upper/down side frequencies and base low-frequency with high-accuracy
a novel frequency detection algorithm for France UM-71 system is proposed. Combining fast Fourier transform with the ratio correction method
the carrier frequency and the base frequency are obtained. Furthermore
the hardware consumption has been decreased. And it possesses the advantage of simple algorithm and fast operation speed. Comparing with the detection of the base frequency
the upper/down side frequency of railway signal is more difficult. Based on spectrum analysis and the spectrum correction
a new method
which adopts the sliding window
is put forward in this paper. The absolute differences between the upper side frequencies and the down side frequencies obtained are regarded as the criterion for judgment. Then the set of data
in which the maximum absolute value is
is to be the result of the upper/down side frequency. Because the sliding window will go through every stage when the upper/down side frequency changes
therefore
it is not sensitive enough to the position of data which need to be transformed. Using the method mentioned above
the experiment results show that the accuracy requirement of the side frequency is satisfied well. 2008 IEEE.
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