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Software channelized coherent frequency-agile radar receiver and receiving method

A frequency agility and receiver technology, which is applied in the field of software channelized coherent frequency agile radar receivers and receivers, can solve the problems of radar operating range repetition frequency limitation, etc. The effect of agile frequency points

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Another object of the present invention is to solve the problem that the radar range is limited by the pulse repetition frequency, so that the coherent frequency-agile radar can detect targets whose time delay is beyond one radar pulse repetition period

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  • Software channelized coherent frequency-agile radar receiver and receiving method
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Embodiment Construction

[0066] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0067] In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicatin...

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Abstract

The invention discloses a software channelized coherent frequency-agile radar receiver and a receiving method. The software channelized coherent frequency-agile radar receiver includes a local frequency oscillator module which generates a first group of single-frequency signals of a fixed frequency and a second group of single-frequency signals of a fixed frequency, a waveform generation and up-converter module which selects base band waveform required by a radar and generates corresponding intermediate-frequency waveform according to the base band waveform, and performs up conversion on the intermediate-frequency waveform to radar radio frequency, and amplifies the radar radio frequency and transmits radar radio frequency signals, and a signal acquisition and down-converter module which receives the radar radio frequency signals and performs down-conversion on the radar radio frequency signals to intermediate frequency, and amplifies the radar radio frequency signals and then performs digital sampling, and performs digital down-conversion on the radar radio frequency signals, and demodulates the signals in to the base band the digital domain. The invention also discloses a software channelized coherent frequency-agile radar receiving method. The software channelized coherent frequency-agile radar receiver and receiving method of the invention can greatly increase radar frequency-agile frequency points under the premise that no equipment is increased; and the software channelized coherent frequency-agile radar receiver and receiving method of the invention have the advantages of excellent coherent performance, multi-frequency point simultaneous receiving and wide observation distance range.

Description

technical field [0001] The invention belongs to the category of radar principle and radar technology, and specifically designs a software channelized coherent frequency agile radar receiver and a receiving method. Background technique [0002] Frequency agility has always been considered to be the most effective anti-jamming method for radar. By changing the transmission frequency between pulses, the radar can effectively deceive and interfere with the work of reconnaissance aircraft, so as to achieve the purpose of being not easily detected, measured and jammed. . Early frequency agile radars usually work in a non-coherent state due to the limitation of receiver technology. The receiver of the non-coherent frequency agile radar cannot use the phase information of the signal reflected from the target, and it is difficult to obtain the coherent accumulation, moving target processing, and high-resolution synthetic bandwidth / aperture imaging capabilities of modern radars, and ...

Claims

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Application Information

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IPC IPC(8): G01S7/285
CPCG01S7/285
Inventor 刘一民王希勤张晨路张祎博文俊杰
Owner TSINGHUA UNIV
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