Check patentability & draft patents in minutes with Patsnap Eureka AI!

A nested array-based multi-octave constant beamwidth beamforming method and system

A technology of constant beam width and multiple frequency multiplication, applied in the direction of impedance network, digital technology network, electrical components, etc., can solve the problems of huge and complex calculation amount of prototype algorithm, and achieve the goal of reducing calculation amount, ensuring quality and reducing calculation amount Effect

Active Publication Date: 2017-02-08
INST OF ACOUSTICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] According to the above description, it can be seen that in the application of multi-octave bands in the prior art, the above-mentioned prototype algorithm is very complicated and has a huge amount of calculation
Therefore, the practical application of the above algorithms is often constrained by computing resources.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A nested array-based multi-octave constant beamwidth beamforming method and system
  • A nested array-based multi-octave constant beamwidth beamforming method and system
  • A nested array-based multi-octave constant beamwidth beamforming method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The present invention performs down-sampling processing on low-frequency sub-array signals, taking nested arrays with a relationship of 2 times and a bandwidth of 7 octaves as an example.

[0064] Such as image 3 As shown, in the figure, sub-array No. 1 is the long sub-array of the first octave (the sub-band with the lowest frequency) (corresponding to the lower frequency limit of the sub-band), and No. 2 sub-array is the short sub-array of the first octave. (corresponding to the frequency upper limit of the sub-band); No. 2 sub-array is also the longest sub-array of the second octave, No. 3 sub-array is the short sub-array of the second octave; and so on, No. 7 sub-array is The long sub-array of the seventh octave (the sub-band with the highest frequency), and the No. 8 sub-array is the short sub-array of the seventh octave. The core steps of the nested array-based multi-octave constant beamwidth beamforming method provided by the embodiment of the present invention ...

Embodiment 2

[0074] This embodiment further optimizes the technical means of embodiment 1, specifically: since the algorithm of embodiment 1 adopts down-sampling and up-sampling processing with frequent use of high multiples, up-sampling and up-sampling become the main calculation amount. However, the core of the downsampling and upsampling algorithms is the low-pass filter, because the coefficient of the low-pass filter will increase linearly with the multiple of the upsampling, which will still cause a large amount of calculation in the low frequency band, especially in the In applications with limited computing resources and real-time processing requirements, it is necessary to study more efficient processing algorithms. For this reason, the present invention further carries out as follows to algorithm Figure 4 The improvement shown, that is, the present invention is further replaced by a 2-stage up-down sampling cascade image 3 High-magnification direct up-down sampling in . Taking...

Embodiment 3

[0101] This embodiment further optimizes the technical means of embodiment 1 or embodiment 2, specifically: the present invention uses the tree algorithm structure in multi-sampling rate digital signal processing to further reduce the calculation amount. The specific improvement is: after the low-frequency band signal is band-pass filtered, it is not necessary to directly perform multi-stage 2-fold upsampling. After only one level of 2-fold up-sampling, the signal can be added to the adjacent high-frequency band, and the signal can be doubled. The signal after frequency band combination is up-sampled by 2 times, and then added to the next octave, so progressive, such as Figure 5-a shown. After calculation, the further optimized algorithm reduces the amount of computation for upsampling to Figure 4 19.7% of the calculated amount.

[0102] In short, after the above-mentioned improvements to the existing algorithm, the calculation amount of the multi-octave nested array const...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a multi-octave identical-beamwidth beam forming method and system based on nesting arrays. The method includes the steps that a sensor array formed by sub-arrays with different bore diameters in a nesting mode receives full spectrum band signals; a length array signal corresponding to each sub-band is used for performing identical-beamwidth processing of the sub-band, the identical-beamwidth beam forming signal in each sub-band is obtained, and the sub-bands are obtained by dividing the whole band of original signals. The identical-beamwidth processing includes the steps that downsampling processing with certain multiplying power is performed on the sub-bands except the sub-band corresponding to the highest frequency according to the highest frequencies corresponding to the sub-bands; upsampling processing with the same multiplying power is performed on the obtained identical-beamwidth beam forming signal of each sub-band; the identical-beamwidth beam forming signals output by all the sub-bands after upsampling processing are synthesized, and therefore the identical-beamwidth beam forming signals with the whole processing bandwidth can be obtained.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to a nested array-based multi-octave constant beamwidth beamforming method and system. Background technique [0002] In the prior art, using a sensor array with a certain spatial distribution scale to receive signals can obtain spatial processing gain, thereby improving the signal-to-noise ratio of the received signal. However, the use of sensor arrays also brings some problems. For example, if the signal frequency band is wide, using a sensor array with fixed spacing and scale for conventional beamforming cannot guarantee a constant beamwidth over the entire frequency band, which will cause the frequency domain of the wideband signal. Distortion, so how to design a wideband constant beamwidth beamforming algorithm becomes an urgent technical problem to be solved. [0003] Currently, state-of-the-art constant beamwidth beamforming algorithms can be implemented in either the f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
Inventor 陈守虎吴国清马力
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com