Underwater DOA estimation based on noncircular signal and adjustable-included-angle array and device thereof
A non-circular signal and included angle technology, which is applied in direction finders using ultrasonic/sonic/infrasonic waves, etc., can solve problems such as rapid signal attenuation and sound velocity influence
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0091] This embodiment proposes a one-dimensional underwater DOA estimation method based on non-circular signals and angle-adjustable uniform linear arrays. By processing the non-circular receiving signals of two uniform sub-linear arrays, the The factor of sound velocity is eliminated in the direction estimation method, thereby eliminating the influence of underwater sound velocity uncertainty on target positioning accuracy. At the same time, due to the non-circular characteristics, the array aperture can be expanded, the estimated number of signal sources can be improved, and errors can be better eliminated in actual measurement. In addition, the two-dimensional array with adjustable angle can be used for flexible measurement. By changing the angle between the two-dimensional linear arrays for multiple measurements, the purpose of improving the estimation performance can be achieved.
[0092] as attached Figure 7 As shown, in this embodiment, the underwater one-dimensional...
Embodiment 2
[0147] This embodiment discloses an underwater one-dimensional DOA estimation device based on a non-circular signal and an adjustable two-dimensional line array. The estimation device includes a data processing and control module, a transmitting module, a receiving module, an output module and power module.
[0148]The data processing and control module is composed of a pair of A / D, D / A converter and a processor, which is the core part of the whole device, and all other modules are directly connected with it. It can control the transmitter module, so that the transmitter module can emit the specified signal; it can control the angle-adjustable line array of the receiver module, so that the line array 1 remains fixed, and the line array 2 rotates on the plane with the connection point as the center, and turns to Set value; at the same time, it can process the signal transmitted from the receiving module, calculate the one-dimensional direction of arrival angle through the under...
Embodiment 3
[0156] This embodiment specifically discloses an underwater one-dimensional DOA estimation device based on a non-circular signal and an angle-adjustable uniform linear array, including a data processing and control module, a transmitting module, a receiving module, an output module and a power supply module.
[0157] The data processing and control module is realized by DSP chip (for example: DSP chip of TI company TMS320VC5509A type), this DSP chip can realize the function of A / D conversion and D / A conversion, and can realize the rotation operator and Calculation of final direction of arrival.
[0158] The stepping motor in the receiving module adopts Toshiba's 23HY6606-CP motor, the stepping angle of this stepping motor is 1.8 degrees, and the stepping motor drive circuit adopts Toshiba's TC78S600FTG chip.
[0159] The receiving module adopts a two-dimensional linear array with adjustable angle, where each array includes a plurality of ultrasonic receiving probes, and the nu...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com