Multi-objective and near-field source locating method and multi-objective and near-field source locating device
A positioning method and near-field source technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of high computational complexity and low operating efficiency of the spectral peak search program, and achieve small size, low cost, and increased applicability. Effect
Active Publication Date: 2015-02-18
JILIN UNIV
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[0007] The present invention provides a multi-objective near-field source location method and device to solve the problems of complex-value matrix eigenvalue decomposition C language implementation of high computational complexity and low operating efficiency of spectral peak search program in the process of near-field source location algorithm implementation.
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[0034] The multi-target near-field source location method is characterized by the following steps:
[0035] Step 1, using the sensor array to receive the target signal, the specific implementation process is as follows:
[0036] Multiple sensors are placed in different formations according to requirements, such as uniform linear array, cross-shaped array, area array, etc., and the analog signals such as sound waves emitted by the positioning target are converted into electrical signals and transmitted to the subsequent circuit.
[0037] Step 2. Preprocessing the signals received by each sensor, the specific implementation process is as follows:
[0038] The subsequent signal preprocessing module of each sensor array first adjusts the amplitude of the signal to adapt to the dynamic range of the subsequent circuit, and then performs low-noise filtering on the signal to remove the noise contained in part of the signal, and transmits the data to the subsequent circuit.
[0039] S...
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The invention relates to a multi-objective and near-field source locating method and a multi-objective and near-field source locating device, belonging to the field of array signal processing. The method comprises the steps of receiving target signals by a sensor array; preprocessing the signals received by all sensors; forming a plurality of receiving matrixes by the sampled and received signals; solving a plurality of covariance matrix eigenvalues and eigenvectors to form a noise subspace; carrying out spectral peak search to obtain location parameters; displaying the location result by a display circuit. The method has the essence of simplifying a Jacobi method for eigenvalue decomposition, so that the time is not consumed for selecting matrix absolute value maximum elements; a way of classification spectral peak search is adopted, so that the program running time is shortened. The device comprises a receiving sensor array, a signal preprocessing module and an algorithm implementation and location result display module. The method and the device are suitable for multiple near-field source location algorithms, and are capable of improving the operating efficiency of the near-field source location algorithms, so that multi-objective and high-accuracy location parameters can be obtained in real time.
Description
technical field [0001] The invention belongs to the field of array signal processing, and in particular relates to a multi-target near-field source positioning method and device. Background technique [0002] Passive positioning is a technology that uses the radiation signal of the positioning target itself to obtain its position information. It has a wide range of applications in military fields such as radar and sonar, as well as in civilian fields such as wireless communication and earthquake monitoring. The traditional passive positioning is to use the time difference of the target source signal to reach different sensors to estimate the source position information. However, this method has low positioning accuracy, and it is difficult to locate multiple target sources. The application of the near-field source location algorithm to the passive location system can give full play to its characteristics of high precision, strong anti-interference ability, spatial super-res...
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Login to View More IPC IPC(8): G01S5/00G01S5/22
CPCG01S5/00
Inventor 孙晓颖刘壮赵一航秦宇镝刘妍妍陈磊
Owner JILIN UNIV