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Zhang Peng,Bi Guangguo,Cao Xiuying,Yuan Xiaohui
Strategic Study of CAE 2007, Volume 9, Issue 6, Pages 71-76
In this paper, at first research of relation between correlation-interval and estimation accuracy is carried out, and the optimal correlation-interval is proved to be existent that is adaptive to signal-to-noise ratio and velocity varieties. Then some special characteristics of the optimal correlation-interval are explored. Based on them an iterative correlation-interval optimized (CIO) algorithm is proposed. It optimizes the correlation- interval and calculates the Doppler spread by increasing the resolution on time-domain iteratively. Simulation results show that contrasted to conventional schemes the proposed approach is less sensitive to signal-to-noise ratio and velocity varieties, and can improves the performance dramatically in low signal-to-noise ratio environment in which the conventional schemes has a poor performance. It achieves the high accurate estimation of Doppler spread directly.
Keywords： Doppler spread autocorrelation optimization iteration
The Cryptographic Properties of Select Logic Functions
Liang Zeng,Li Shiqu
Strategic Study of CAE 2005, Volume 7, Issue 7, Pages 50-54
In this paper, the main results are concerned with the Walsh transform and the autocorrelation function
Keywords： select logic function Walsh transform autocorrelation function strict avalanche criterion correlation
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI
Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2, Pages 446-472 doi: 10.1007/s11709-019-0605-8
Keywords： ambient vibration test high level noise iterative signal enhancement wavelet cross and autocorrelation
Frequency-domain Analysis of ECG Signals
Tu Chengyuan,Zeng Yanjun,Li Shuxin
Strategic Study of CAE 2002, Volume 4, Issue 12, Pages 66-70
A new simple approach to effectively detect QRS — T complexes in ECG curve is described, so as to easily get the P-wave (when AF does not happen) or the f-wave (when AF happens). By means of signal processing techniques such as the power spectrum function, the auto-correlation function and cross-correlation function, two kinds of ECG signals when AF does or does not happen were successively analyzed, showing the evident differences between them.
Keywords： ECG curve P-wave f-wave AF (atrial fibrillation) histogram power spectrum autocorrelation cross-correlation
Imposing Active Sources during High-Frequency Passive Surface-Wave Measurement Article
Feng Cheng,Jianghai Xia,Chao Shen,Yue Hu,Zongbo Xu,Binbin Mi
Engineering 2018, Volume 4, Issue 5, Pages 685-693 doi: 10.1016/j.eng.2018.08.003
Keywords： Passive surface wave Active surface wave High frequency Mixed-source surface wave Spatial autocorrelation
Title Author Date Type Operation
Adaptive Optimization of Correlation-Interval for DopplerSpread Estimation and Its Iterative Implement
Zhang Peng,Bi Guangguo,Cao Xiuying,Yuan Xiaohui
Journal Article
Wavelet-based iterative data enhancement for implementation in purification of modal frequency for extremely noisy ambient vibration tests in Shiraz-Iran
Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI
Journal Article
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