Multi-sending-multi-receiving interference synthetic aperture radar time frequency two-dimension signal waveform designing method

A technology of interferometric synthetic aperture and multi-transmit and multi-receive, which is applied in the field of time-frequency two-dimensional signal waveform design of multi-transmission and multi-receive interferometric synthetic aperture radar, and can solve the problems of reducing the performance of multi-transmit and multi-receive interferometric synthetic aperture radar, and reducing the width of the surveying swath.

Active Publication Date: 2014-02-26
XIDIAN UNIV
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can greatly reduce the mutual interference between signals, because it needs to increase the repetition frequency of the transmitted signal waveform, it will greatly reduce the width of the surveying

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-sending-multi-receiving interference synthetic aperture radar time frequency two-dimension signal waveform designing method
  • Multi-sending-multi-receiving interference synthetic aperture radar time frequency two-dimension signal waveform designing method
  • Multi-sending-multi-receiving interference synthetic aperture radar time frequency two-dimension signal waveform designing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0029] Step 1. Calculate the carrier frequency variation Δf required for waveform design ij .

[0030] 1a) Let reference combination A 1 -A 1 The spectral function of the ground scattering coefficient is Γ 11 (f r ), transmit-receive combination A i -A j The spectral function of the ground scattering coefficient is Γ ij (f r ), wherein, i=1,2,...,M, j=1,2,...,M, M is the number of array elements; the relationship between the two is: Γ ij (f r )=Γ 11 (f r +Δf G,ij ), where Δf G,ij for Γ ij (f r ) relative to Γ 11 (f r ) frequency shift, f r is the distance dimension frequency;

[0031] 1b) Let the pitch angle of the array element be θ=[θ 1 ,…,θ i ,…,θ M ], where θ i is the i-th array element A i According to the relational expression of the ground scattering coefficient spectrum function in the above 1a), calculate Γ ij (f r ) and Γ 11 (f r ) betw...

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-sending-multi-receiving interference synthetic aperture radar time frequency two-dimension signal waveform designing method which mainly solves the problem that in the prior art, waveform orthogonality is poor, and sending signal pulse repetition frequency is high. The implementation steps of the method are that 1. carrier frequency variable quantity delta f i j needed by waveform design is computed; 2. according to the carrier frequency variable quantity delta f i j, the carrier frequency f i j of a sending signal of a sending-receiving combination Ai-Aj is computed; 3. the carrier frequency f i j is subjected to non-redundancy processing through the frequency shift consistency of the sending-receiving combination Ai-Aj and Aj-Ai; 4. according to the non-redundancy carrier frequency number, the sending pulse of an i array element Ai is subjected to sub-pulse number dividing, carrier frequency is distributed to each sub pulse; and 5. the sending sub pulses of array elements are subjected to modulation respectively through the carrier frequency f i j, and a radar waveform signal si(t) is obtained. According to the method, pulse repetition frequency is effectively lowered, waveform orthogonality is improved, larger surveying and mapping band width is obtained, and the method can be used for multi-sending-multi-receiving interference synthetic aperture radar imaging.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method for designing time-frequency two-dimensional signal waveforms of multiple-transmit and multiple-receive interference synthetic aperture radar. This method can be used in the interferometric synthetic aperture radar system. By optimizing the transmitted signal waveform, while obtaining high waveform orthogonality, the frequency shift of the ground scattering coefficient caused by different viewing angles is compensated to improve the performance of multi-receiving and multi-transmitting interferometric synthetic aperture radar. Signal utilization and swath width. Background technique [0002] Interferometric synthetic aperture radar is the extension and development of the general synthetic aperture radar function. It uses multiple receiving antennas or multiple observations of a single antenna to perform interference processing. It can estimate the elevation of the ground, ...

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
IPC IPC(8): G01S7/28G01S13/90
CPCG01S7/2813G01S7/282G01S7/42G01S13/24G01S13/9023
Inventor 唐世阳刘楠郭苹张林让张娟
Owner XIDIAN UNIV
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