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1. 中国科学院 长春光学精密机械与物理研究所,吉林 长春,中国,130033
2. 长春工业大学 计算机科学与工程学院,吉林 长春,130012
收稿日期:2008-06-23,
修回日期:2008-07-23,
纸质出版日期:2009
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张学明, 张振娅, 戴明, 孙敬辉. 机载设备IRIG-B(AC)码的滤波及其数字相位补偿[J]. 光学精密工程, 2009,17(1): 213-219
ZHANG Xue-ming, ZHANG Zhen-ya, DAI Ming, SUN Jing-hui. Filtering and digital phase compensation of IRIG-B (AC) code in airborne equipment[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 213-219
张学明, 张振娅, 戴明, 孙敬辉. 机载设备IRIG-B(AC)码的滤波及其数字相位补偿[J]. 光学精密工程, 2009,17(1): 213-219 DOI:
ZHANG Xue-ming, ZHANG Zhen-ya, DAI Ming, SUN Jing-hui. Filtering and digital phase compensation of IRIG-B (AC) code in airborne equipment[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 213-219 DOI:
为了解决机载环境下交流B 码信号中的噪声和畸变问题
提高解码的精度和稳定性
设计了中心频率在1 kHz的带通滤波器对IRIG-B码信号进行滤波;然后
针对滤波后所引入的相位差设计了一个数字补偿电路
对1 PPS信号进行相位校准
消除相位误差。实验结果表明:滤波有效地抑制了信号中的噪声
还将失真的信号还原成真实的信号
无用的频率信号以-34 dB/十倍频率的水平得到抑制;经过数字相位补偿后
不仅消除了由于滤波所引入的相位差
而且消除了由于过零器的过零精度等所引入的相位差
1 PPS准时点的精度由文献[1]的优于 10 s提高到了优于3 s。该设计满足机载环境下交流时间码的解码要求
消除了噪声的干扰和信号的失真
提高了解码的精度和稳定性。
In order to eliminate the interference of airborne environment and to improve the precision of decode and the EMC ability
the filtering of IRIG-B (AC) and the compensation of phase hysteresis caused by the filter are studied. A band-pass filter with a 1 kHz center frequency is designed
then the digital compensation is used for the phase hysteresis caused by filter. The results show that the ability of anti-jamming
anti-distortion and the decoding stability of the decoder are improved
and the useless frequency signals are depressed by -34 dB/10 octave. The digital compensation strategy can eliminate not only the phase hysteresis
but also the error caused by zero-crossing detector. The timing precision of 1 PPS is enhanced from better than 10 s to better than 3 s.The airborne system satisfies the decoding requirement of IRIG-B (AC)
eliminates the noise interference and signal distortion
and enhances the decoding precision and stability.
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