Waveform design method based on inter-pulse phase spectrum double agility

A technology of waveform design and phase spectrum, applied in radio wave measurement systems, instruments, etc., can solve problems such as clutter folding, lifting clutter base, distance ambiguity of PD radar system, etc., achieve good sidelobe characteristics, improve suppression ability, The effect of reducing reproducibility

Pending Publication Date: 2021-11-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Therefore, for scenes with strong clutter power and long clutter coverage distance, the folded clutter will significantly raise the clutter base, seriously affecting the detection of long-distance low-speed small targets
[0004] To sum up, in the prior art, because the parameters such as PRT, c

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  • Waveform design method based on inter-pulse phase spectrum double agility
  • Waveform design method based on inter-pulse phase spectrum double agility
  • Waveform design method based on inter-pulse phase spectrum double agility

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[0048] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0049] In the traditional PD radar system, the parameters such as PRT, carrier frequency, and intra-pulse modulation of each pulse are fixed values, which makes the radar echo along the distance dimension appear range ambiguity and clutter folding. If each pulse in the PD radar signal adopts a different modulation method, and the pulses are as orthogonal as possible, then by setting a set of receiving filters at the receiving end, and each filter corresponds to a specific transmission pulse, so that The echo of each transmitted pulse can only pass through the corresponding filter, and the distance of each observation of the filter bank is set as R=T r C / 2, observing targets at other distances can be achieved by T r The filter bank is moved for the time delay, so that the entire observation distance is divided into multiple distance segments in units of R, thus solvi...

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Abstract

The invention discloses a waveform design method based on inter-pulse phase spectrum double agility. According to the method, a generated PD radar signal waveform has a stronger range gating characteristic through employing phase coding between pulses and employing different modulation modes in the pulses to improve the inhibition capability of range ambiguity and folded clutter, and the replicability of the signal is reduced based on an inter-pulse phase spectrum double-agility signal, so that the initiative of interference confrontation is mastered from the angle of radar waveform.

Description

technical field [0001] The invention belongs to the technical field of radar waveform design, and in particular relates to a waveform design method based on double-agility inter-pulse phase spectrum. Background technique [0002] Pulse Doppler (Pulse Doppler, PD) radar uses the Doppler effect of the echo on the basis of distance dimension resolution, and can realize effective resolution between targets at different speeds, and between moving targets and clutter. In a traditional PD radar system, in order to achieve coherent accumulation between pulses and fast calculation using FFT, usually within a coherent processing cycle (Coherent Processing Interval, CPI) with a fixed pulse repetition time (Pulse RepetitionTime, PRT) or Pulse repetition frequency (Pulse Repetition Frequency, PRF) transmits a series of identical coherent pulses. By performing fast-time pulse compression and slow-time Fourier transform processing on the received echo, the coherent accumulation of echo ene...

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Application Information

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IPC IPC(8): G01S7/36G01S7/38G01S7/02G01S7/282
CPCG01S7/36G01S7/38G01S7/023G01S7/282
Inventor 任丽香龙腾刘子豪孙颖豪毛二可范花玉
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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