Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Radar Waveform Design Method Constraining the Maximum Distance Stride Loss

A radar waveform and maximum distance technology, applied in the radar field, can solve the problems of large mismatch between echo signal and matched filter, large signal-to-noise ratio loss, etc., and achieve easy target detection, improved acquisition accuracy, and small distance straddle loss Effect

Active Publication Date: 2020-10-09
XIDIAN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not incorporate the distance crossing loss into the waveform design, resulting in a large mismatch between the echo signal and the matched filter, resulting in a large signal-to-noise ratio loss during the matched filter

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 Radar Waveform Design Method Constraining the Maximum Distance Stride Loss
  • A Radar Waveform Design Method Constraining the Maximum Distance Stride Loss
  • A Radar Waveform Design Method Constraining the Maximum Distance Stride Loss

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Radar waveform design is a subject with a very long history. According to different radar systems, there are often different forms of radar waveforms, such as linear frequency modulation signals, ordinary polyphase code waveforms, nonlinear frequency modulation signals, etc. Phase-modulated polyphase code radar is a new system radar proposed for the shortcomings of common polyphase code waveforms. The designed waveform has a higher degree of spectrum tightening, so there will be smaller transmission distortion and transmission power loss. Moreover, this new system radar adopts the framework of continuous phase modulation, which has good engineering feasibility and has great development prospects in the future. But it has not been put into practical use yet, and many engineering connections still need to be developed and innovated. The waveform design method of the present invention is aimed at this new system radar. The present invention proposes a radar waveform design...

Embodiment 2

[0049] The radar waveform design method that constrains the maximum distance straddling loss is the same as that in embodiment 1, and the formula of the maximum distance straddling loss under the condition of no distortion obtained by the construction described in step 2, the specific formula is:

[0050]

[0051] MaxRangeStraddlingLoss=max[RangeStraddlingLoss(τ)]

[0052] Namely: distance straddle loss

[0053]

[0054] Among them, the maximum distance straddling loss is the maximum value of the distance straddling loss (τ), and the distance straddling loss (τ) is the distance straddling loss of the phase-modulated polyphase code radar waveform without distortion, and is the sampling deviation The function of τ, τ is the sampling deviation, which refers to the error from the continuous value to the discrete value when the target echo delay is sampled by the radar receiver, and the value range is (-0.5T s ,0.5T s ), T s is the sampling period of the radar receiver, ...

Embodiment 3

[0057] The radar waveform design method that constrains the maximum distance straddling loss is the same as the user-defined distance straddling loss tolerance constant ε described in embodiment 1-2, step 4), 0 is the average value of the maximum distance straddling loss of the phase-modulated polyphase code radar waveform corresponding to multiple randomly generated phase code vectors under the condition of no distortion.

[0058]The distance straddling loss tolerance constant ε is a user-defined distance straddling loss tolerance constant, 0 is the average value of the maximum distance straddling loss in the undistorted case of the phase-modulated polyphase code radar waveform corresponding to multiple randomly generated phase codes.

[0059] The waveform designed by the present invention has a lower maximum distance straddling loss than other waveforms under the same conditions. The present invention takes the upper bound of ε as is the average value of the maximum dis...

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 maximal distance striding loss constrained radar waveform design method. Distance striding loss is included in waveform optimization, and mismatching between echo signals anda matching filter is reduced. The design method is realized by determining an initial value of a phase code vector of the waveform of a phase modulated polyphase code radar, carrying out constraint-free optimization design on the phase code vector, determining a formula of the maximal distance striding loss when there is no distortion, and optimizing the maximal distance striding loss of the phase code vector when there is no distortion. According to the established formula of the maximal distance striding loss when there is no distortion, the distance striding loss is included in waveform optimization, a tolerance selection scheme of the distance striding loss is provided, and the waveform design efficiency is improved. The waveform with high autocorrelation characteristics, high frequency spectrum convergence degree and high Doppler tolerance is designed, and the waveform includes a lower distance striding loss under the same condition. The method of the invention is applied to waveform design of the phase modulated polyphase code radar.

Description

technical field [0001] The invention belongs to the technical field of radar, and mainly relates to a waveform design method, in particular to a radar waveform design method constraining maximum distance straddle loss, which is used for waveform design of phase modulation polyphase code radar. Background technique [0002] For the consideration of the maximum operating distance of the radar, the transmitting waveform of the radar is basically constant modulus. The polyphase code waveform is a commonly used radar waveform. The general radar polyphase code waveform is composed of chips. The phase within a chip remains unchanged, but there is a phase change between adjacent chips. Such waveforms are easy to analyze and optimize, and there are currently a large number of design algorithms that can be used to design polyphase code waveforms with good autocorrelation characteristics. Some algorithms even incorporate factors such as Doppler tolerance into radar polyphase code wavef...

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): G01S7/02
CPCG01S7/02
Inventor 刘宏伟纠博王春蕾周生华王鹏辉
Owner XIDIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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