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Adaptive distance evaluation method under frequency interference, and system thereof

A frequency adaptive, frequency technology, applied in the field of radar communication, can solve the problem of not obviously increasing the number of transmitted pulses

Inactive Publication Date: 2015-08-05
SHENZHEN UNIV
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Problems solved by technology

[0004] The first technical problem to be solved by the present invention is to provide a radar distance estimation method based on frequency virtual extension, aiming to improve the resolution of distance estimation and the number of target sources that can be estimated without significantly increasing the number of transmitted pulses. number

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  • Adaptive distance evaluation method under frequency interference, and system thereof
  • Adaptive distance evaluation method under frequency interference, and system thereof
  • Adaptive distance evaluation method under frequency interference, and system thereof

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] Considering the existence of frequency interference, the shortcomings and defects of the existing radar distance estimation algorithm are mainly reflected in: (1) At the transmitting end, the radar system cannot adaptively select the frequency point without interference as the carrier (2) At the receiving end, the signal waveform without frequency interference cannot be adaptively selected for distance estimation, which seriously affects the performance of parameter estimation. Therefore, the present invention selects a frequency point without interference as the carrier frequency of the tra...

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Abstract

The invention is suitable for the field of radar communication, and provides a frequency-based adaptive signal transmission method of a radar system under a frequency interference, a signal transmission system, a radar distance evaluation method and a radar distance evaluation system. According to the method of the invention, at the transmitting end of the radar system, frequency distribution of the interference is obtained through existing spectrum sensing technology; furthermore a frequency point without interference is selected as the carrier frequency of a transmitting signal; at the receiving end, a frequency point signal with a relatively low interference is selected through waveform correlation; and then distance evaluation is performed by means of frequency virtual expansion technology, thereby improving distance evaluation resolution and interference resistance of the system.

Description

technical field [0001] The invention belongs to the field of radar communication, and in particular relates to a signal transmission method and system based on frequency self-adaptation of a radar system under frequency interference, and a radar distance estimation method and system. Background technique [0002] MIMO (Multiple-Input Multiple-Output) radar uses multi-antenna technology to transmit independent signal waveforms through different paths and receive the reflected signals of corresponding targets. Information such as Le translation is extracted at the receiving end through a matched filter. MIMO radars utilize waveform diversity and digital beamforming techniques to improve range estimation resolution. In recent years, with the increasing shortage of spectrum resources, frequency interference has become more and more serious. Due to the exclusive and limited characteristics of radio spectrum, and it is not restricted by region, time domain, and air domain, wirele...

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Application Information

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IPC IPC(8): G01S7/282G01S13/08
CPCG01S7/282G01S13/08
Inventor 谢宁李保良张莉王晖
Owner SHENZHEN UNIV
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