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In this paper, we consider the problem of direction of arrival (DOA) estimation with co-prime arrays via compressed sensing methods. A sparse signal recovery model based on the framework of co-prime array is presented. We propose to use OMP algorithm to efficiently implement the optimization procedure, which have a lower computational cost. The sparse recovery model of DOA estimation obeys the isotropy...
This paper considers the problem of tracking multiple acoustic sources in 3-D space using a distributed acoustic vector sensor array. Unlike the existing two-stage localization approach, which estimates the direction of arrival of the source at each sensor first and then triangulate a 3-D position, a particle filtering approach is developed to directly fuse the signals collected from distributed sensors...
Using the relationship between the number of zero-crossings and signal frequency, A Variable Bandwidth Band-pass Filter-Zero-Crossing Detection is proposed. This method can be used to estimate the echo frequency in Doppler Velocity Measurement. According to computer simulation, the estimation error of echo is 2 Hz approximately (Echo-to-Reverberation Ratio is -15 dB, echo frequency is 10360 Hz); according...
Based on the theory of enterprise core competitiveness and the features and basic structure of the core competitiveness of third-party logistics enterprises, the indicator evaluation system of logistics enterprises is summarized into three categories: ductility, customer-value and uniqueness in accordance with eight specific evaluation indicators. In view of unclear frontiers of evaluation indicators...
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