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Method for improving tracing precision of digital single pulse system

A technology of tracking accuracy and single pulse, applied in the field of communication, can solve the problems of no improvement in accuracy

Inactive Publication Date: 2008-01-23
CHONGQING UNIV
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AI Technical Summary

Problems solved by technology

Since the digital monopulse is a new technology, its system structure has only been proposed in the past two years, so apart from finding ways to design the antenna array, there are no studies and reports on other methods to improve the accuracy of this type of system.

Method used

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  • Method for improving tracing precision of digital single pulse system
  • Method for improving tracing precision of digital single pulse system
  • Method for improving tracing precision of digital single pulse system

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Embodiment Construction

[0044] See Figure 4, a method for improving the tracking accuracy of a digital monopulse system. In a digital monopulse system, when the signal-to-noise ratio of the incoming signal decreases due to various reasons, by adjusting the baseband array signal in the digital beamformer The weighting coefficient changes the direction of the digital monopulse unit beam, increases the angle between the unit beams, and minimizes the decrease in tracking accuracy caused by the decrease in the signal-to-noise ratio of the incoming wave signal, and even keeps the tracking accuracy unchanged.

[0045] Specifically include the following steps, see Figure 4:

[0046] 1. After the signal received by the antenna array is collected into a baseband digital signal, it is first sent to the direction of arrival (DOA) estimator to calculate an initial direction of arrival value θ 0 .

[0047] 2. Take θ 0 As the initial line-of-sight pointing of monopulse tracking, and select a suitable unit beam an...

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Abstract

The invention relates to a method for improving the tracking accuracy of a digital single-pulse system. In a digital single-pulse system, when the sound noise ratio of an incoming signal drops, the directing of the digital single-pulse unit wave beam is changed by adjusting the weighing coefficient of the baseband array signal in a digital wave beam former, and the included angle between unit wave beams is increased; the reduction in the tracking accuracy due to the dropping of the sound noise ratio of the incoming signal is minimized, so as to maintain the tracking accuracy. The invention needs no modification in term of hardware on an existing digital single-pulse system, is easy to realize, of low cost and high feasibility; needs no cost in term of hardware and needs only add very few calculation on the digital signal processor; can automatically improve the tracking accuracy with the degradation of the sound noise ratio of an incoming signal, weaken even eliminate any influence of the degradation of the sound noise ratio on the tracking accuracy; can improve to certain extent the accuracy and compensate any shortcoming in system design if the design of the tracking system is not thoughtful and the tracking accuracy is not far from the requirement from an applicable standard.

Description

technical field [0001] The invention relates to a method for improving the tracking precision of a digital monopulse system, in particular to a method for adjusting the included angle of a unit beam for improving the tracking precision of a digital monopulse system, which belongs to the technical field of communication. Background technique [0002] Monopulse technology is a precision angle tracking technology developed on the basis of conical scanning and beam switching. It can simultaneously provide all the beams required to be sensitive to angular errors, and compare the outputs of each beam on a single pulse at the same time, thereby eliminating echo. The effect of wave amplitude variation with time on angle measurement and tracking. Traditional monopulse technology is generally divided into amplitude-ratio, phase-comparison, and difference monopulse. Among them, sum-difference monopulse is the most widely used because of its looser requirements on channel balance. [0...

Claims

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Application Information

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IPC IPC(8): G01S7/28G01S7/285G01S13/44
Inventor 雷剑梅陈旻韩先花邓晓琴陈世勇曹海林韩庆文
Owner CHONGQING UNIV
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