| 基于小波变换的二相编码信号检测 |
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| 引用本文： | 宁辉,陈超. 基于小波变换的二相编码信号检测[J]. 长春邮电学院学报, 2011, 0(6): 523-528 |
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| 作者姓名： | 宁辉 陈超 |
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| 作者单位： | [1]北京航空工程技术研究中心特设研究室,北京100076 [2]空军航空大学航空电子工程系,长春130022 |
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| 摘 要： | 针对低信噪比条件下相位编码信号检测效果差的问题，运用粗细定位相结合的思想，采用双尺度小波变换对二相编码信号进行了研究。该方法在大尺度的模值点上，对信号的奇异点进行粗略定位；在小尺度的模值点上，对信号的奇异点进行精确定位，进而实现了对二相编码信号的检测。通过仿真实验表明，该算法在信噪比优于0dB的情况下，可以较好地完成信号的检测过程，当信噪比优于3dB时，检测概率高于95％。
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| 关 键 词： | 小波变换 双尺度 二相编码信号 信号检测 |
Detection of Two Phase-Code Signal Based on Wavelet Transform |
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| NING Hui,CHEN Chao. Detection of Two Phase-Code Signal Based on Wavelet Transform[J]. Journal of Changchun Post and Telecommunication Institute, 2011, 0(6): 523-528 |
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| Authors: | NING Hui CHEN Chao |
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| Affiliation: | 1. Research Office of Special Equipment, Beijing Aviation Engineering Technique Research Center, Beijing 100076, China; 2. Department of Aviation Electronieal Engineering, Aviation University of Air Force, Changchun 130022, China) |
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| Abstract: | For the detection of phase-code signal with low SNR （ Signal-to-Noise Ratio）, two phase-code signal was studied based on double-scale wavelet transform, according to the combination of rough orientation and accu- rate orientation. The modular maximum of big scale is used to find the range of the singularity, the exact point of the singularity is found on a small scale, so that the detection of two phase-code signal would be achieved. Through the computer emulation, this algorithm can realize the detection of the two phase-code signal accurately when the SNR exceeds 0 dB, detection probability would be upon 95% when the SNR exceeds 3 dB. |
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| Keywords: | wavelet transform double-scale two phase-code signal signal detection |
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