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Frequency difference estimation method for pulse string signals

A frequency difference estimation and pulse signal technology, applied in the field of frequency difference estimation of pulse train signals, can solve problems such as low efficiency and poor real-time performance, and achieve the effects of low computational complexity, improved efficiency, and improved real-time performance.

Pending Publication Date: 2021-03-30
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for frequency difference estimation of pulse train signals to solve the problems of low efficiency and poor real-time performance in current frequency difference estimation

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  • Frequency difference estimation method for pulse string signals
  • Frequency difference estimation method for pulse string signals
  • Frequency difference estimation method for pulse string signals

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Embodiment Construction

[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The present invention first utilizes space-borne reconnaissance equipment to carry out time-frequency conversion to each received pulse signal, determines the complex value corresponding to the highest point of each pulse amplitude-frequency response, and adds the complex value into the pulse description word; then the space-borne receiver will The pulse description word (PDW) with the above-mentioned complex values ​​is sent to the ground data processing center, and the data processing center sorts the PDW sequence and matches the pulses received by each station; finally performs conjugate multiplication for each pair of matched complex values , form a new sequence, and perform discrete Fourier transform on the newly obtained sequence to estimate the frequency difference. The specific implementation process of this method is as follo...

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Abstract

The invention relates to a frequency difference estimation method for pulse string signals, and belongs to the technical field of time-frequency difference passive positioning. According to the method, the amplitude corresponding to the highest point of the amplitude-frequency response of each pulse signal received by each receiver is calculated; after pulse sorting, the amplitude corresponding tothe highest point of the amplitude-frequency response of the two signals of the same pulse pair form a new signal; only simple discrete amplitude-frequency conversion needs to be carried out on the formed new signal; and a frequency corresponding to the maximum signal amplitude-frequency response is selected, wherein the frequency is the frequency difference of the same pulse signal received by the two receivers to be estimated. The method is low in calculation complexity, can achieve the estimation of the signal frequency difference quickly, greatly improves the frequency difference estimation efficiency, and improves the real-time performance of a whole system.

Description

technical field [0001] The invention relates to a method for estimating a frequency difference of a burst signal and to the technical field of time-frequency difference passive positioning. Background technique [0002] Space-borne electronic reconnaissance equipment conducts reconnaissance and interception of radiation source signals in space, and performs parameter measurement to obtain signal parameter information. Due to the large number of radiation sources and dense signals in space, the signal transmission pressure is high. Therefore, it is difficult for spaceborne electronic reconnaissance equipment to completely transmit the original signal data to the ground data processing center in real time. However, one of the main tasks of current space electronic reconnaissance is to locate the radiation source. The traditional positioning parameters include three parameters: angle of arrival, time difference and frequency difference. The existing angle of arrival and time ...

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Application Information

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IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 赵闯姜宏志杨静赵拥军胡德秀刘成城
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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