BOC modulation has the advantages of low interference with BPSK and high anti-fading capability. The main challenge in BOC tracking is represented by the presence of multiple peaks in the correction function. Various ...
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BOC modulation has the advantages of low interference with BPSK and high anti-fading capability. The main challenge in BOC tracking is represented by the presence of multiple peaks in the correction function. Various tech- niques have been designed for solving the multiple-peak ambiguity problem for special forms of BOC signals. In this paper, Different algorithms, such as BPSKlike, Bump-Jump, Double Estimate and Unambiguity Discrimination are analyzed and compared. A method based on ASPeCT Technique for baseband signal processing is simulated, which can improve code tracking reliability. Simulation results prove the effect of the method.
The effective classification of crack,as a key aspect in maintaining rail safety,plays a significant role in ensuring the reliable operation of high-speed *** are mainly supervised and unsupervised algorithms for clas...
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The effective classification of crack,as a key aspect in maintaining rail safety,plays a significant role in ensuring the reliable operation of high-speed *** are mainly supervised and unsupervised algorithms for classification *** learning algorithms require a large amount of labeled data and have limited generalization capability,and unsupervised learning algorithms have low classification *** address these shortcomings,a multi-center density peak clustering based on the multi-layered weight density(MDPC-MWD) is proposed to classify rail cracks more efficiently using acoustic emission *** information of different rail cracks is comprehensively reflected by studying the entropy feature of the signals from the perspective of singular ***,an improved multi-layered weight density is proposed to address the uneven density distribution of the crack ***,the classification results are obtained through micro-cluster self-recognition and self-merging *** method is demonstrated in the rail fatigue experiments,and the results show that the proposed MDPC-MWD method achieve outstanding classification performance.
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