Software channelized coherent frequency-agile radar receiver and receiving method
A frequency-agile and receiver technology, which is applied in software channelized coherent frequency-agile radar receivers and receiving fields, can solve problems such as the limitation of radar action distance and repetition frequency, achieve a large range of observation distance, expand the range of observation distance, and expand radar The effect of agile frequency points
Active Publication Date: 2017-07-28
TSINGHUA UNIV
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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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[0066] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0067] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...
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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 the most effective means of radar anti-jamming. By continuously changing the transmission frequency between pulses, radar can effectively deceive and interfere with the work of reconnaissance aircraft, so as to achieve the purpose of not being easily detected, measured and interfered. . Early frequency-agile radars usually work in a non-coherent state due to the limitation of receiver technology. The receiver of 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...
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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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