Multi-channel undersampling frequency measurement method for wide bandwidth frequency hopping narrow band signals

A narrow-band signal and multi-channel technology, which is applied in the field of frequency measurement of large-bandwidth frequency-hopping narrow-band signals, can solve problems such as frequency ambiguity, achieve the effects of small computing power, reduce data rate, and improve frequency measurement accuracy

Active Publication Date: 2018-11-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF12 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a multi-channel under-sampling frequency measurement method for large-bandwidth frequency-hopping narrow-band signals, which effectively solves the problem of frequency ambiguity under under-sampling conditions

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
  • Multi-channel undersampling frequency measurement method for wide bandwidth frequency hopping narrow band signals
  • Multi-channel undersampling frequency measurement method for wide bandwidth frequency hopping narrow band signals
  • Multi-channel undersampling frequency measurement method for wide bandwidth frequency hopping narrow band signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In order to more clearly demonstrate the advantages, implementation steps and analysis methods of the undersampling frequency measurement method proposed by the present invention, the specific embodiments of the present invention are described in detail below.

[0019] 1) The frequency hopping range is set to f 1 ~f 2 , the signal bandwidth is set to B s , and satisfy B s 1 , B s 2 -f 1 . Select ADC sampling rate f s , and satisfy 2B s s 2 -f 1 ), select the reference frequency as f 0 . The number of channels is set to M, and M different local oscillator signals are used to down-convert the RF analog signals of the M channels to the same IF frequency hopping range, and divide N IF sub-bands, such as figure 1 shown, respectively The selection of N is related to the frequency hopping bandwidth and sampling rate f s and the reference frequency f 0 three factors; therefore, the IF frequency hopping range is and IF frequency hopping bandwidth Bandwidth per ...

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 discloses a multi-channel undersampling frequency measurement method for wide bandwidth frequency hopping narrow band signals. A multi-channel cooperative frequency measurement method isadopted, and measurement on the frequency of the wide bandwidth frequency hopping narrow band signals under an undersampling condition can be realized. The multi-channel undersampling frequency measurement method comprises steps: firstly, multiple signal channels with frequency bands mutually overlapped and capable of meeting a signal frequency hopping range and frequency ambiguity resolution condition are built; signals in each channel are then subjected to over threshold detection, and channels with over threshold are subjected to signal frequency measurement; and finally, an over thresholddetection result and a frequency measurement result are analyzed integrally, frequency ambiguity resolution processing under the undersampling condition is completed, and the signal frequency is obtained. Multiple channels are used for frequency measurement at the same time, measurement on the frequency of the wide bandwidth frequency hopping narrow band signals under the undersampling conditioncan be realized,and in comparison with a frequency measurement method at a Nyquist sampling rate, the data rate is reduced.

Description

technical field [0001] The invention belongs to the field of digital signal processing, and relates to a method for measuring the frequency of a large-bandwidth, frequency-hopping, and narrowband signal under the condition of under-sampling by using a multi-channel signal. Background technique [0002] The Nyquist sampling theorem states that an analog signal in the time domain is converted to a digital signal through an analog-to-digital converter (ADC), and the sampling rate of the ADC must be no less than the Nyquist frequency to avoid frequency aliasing. For wide-bandwidth frequency-hopping narrowband signals, to satisfy the Nyquist theorem, a very high ADC sampling rate is required, which will undoubtedly pay a very high price, and even existing ADC devices cannot meet the frequency-hopping requirements. Therefore, the frequency measurement method under the condition of undersampling has extremely high research significance and practical value. However, frequency measu...

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 Applications(China)
IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 江朝抒王泽锟肖培于建李嘉辛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap