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A Phase-Amplitude Calibration Filter and Method for Improving the Performance of Short-Pulse Non-Coherent Radar Signal Processing

An amplitude calibration and phase calibration technology, applied in instruments, radio wave measurement systems, electrical components, etc., can solve the problems of compensating for the degradation of coherent processing performance and the uncertainty of the center frequency of the radiated signal, so as to improve the coherence, The shape of the network is basically the same, and the output amplitude is the same.

Active Publication Date: 2021-01-05
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0004] The main purpose of the present invention is to solve the problem of compensating coherent processing performance degradation caused by the uncertainty of the center frequency of the radiation signal between different pulses

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  • A Phase-Amplitude Calibration Filter and Method for Improving the Performance of Short-Pulse Non-Coherent Radar Signal Processing
  • A Phase-Amplitude Calibration Filter and Method for Improving the Performance of Short-Pulse Non-Coherent Radar Signal Processing
  • A Phase-Amplitude Calibration Filter and Method for Improving the Performance of Short-Pulse Non-Coherent Radar Signal Processing

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Embodiment Construction

[0038] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The radiation signal model of short-pulse non-coherent radar can be expressed as:

[0040]

[0041] Where t represents the fast time of the radar, and its starting position is the start of each dwell. g(t) is the microwave pulse envelope signal centered at t=0, f m Indicates the center frequency of the mth microwave pulse, Indicates the reference phase of the mth pulse. Due to the non-coherent factors in the process of generating microwave pulses by vacuum electronic devices, there is randomness in the center of the envelope of each microwave pulse, the starting phase is random, and the center frequency is also uncertain between pulses. where t dm Indicates the amount of jitter at the center of the envelope...

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Abstract

The invention discloses a phase-amplitude calibration filter and a method for improving short pulse non-coherent radar signal processing performance, and mainly solves the problem that compensation coherent processing performance is lowered due to the center frequency uncertainty of a radiation signal among different pulses. The basic thought of the invention is as follows: one path of signal is subjected to coupling extraction to serve as a reference signal for radar receiver signal processing by aiming at an each-time radiation pulse waveform; the reference signal is used for constructing the phase-amplitude calibration filter, wherein the filter and a matching filter are combined to form a compound filter specially designed for the microwave pulse, the model of the phase-amplitude calibration filter is R(t)H=C(t)=PSF(t)exp([Zeta](-t)), ()H is that a conjugate operator is gotten, the PSF(t) is an enveloped point diffusion function, R(t) is matching filtering output, and C(t) is a phase calibration filter.

Description

technical field [0001] The invention belongs to the technical field of short-pulse non-coherent radar, and in particular relates to a method for improving signal processing performance. Background technique [0002] The microwave power source of short-pulse non-coherent radar belongs to vacuum electronics device, and the microwave pulse signal generated by it has the characteristics of high peak power and short pulse width. At the same time, from the perspective of radar signal processing, there is randomness in the center of the microwave pulse envelope generated by it, the starting phase of each microwave pulse is random, and the center frequency is also uncertain between pulses. Therefore, a short-pulse non-coherent radar operating at repeated frequencies is a completely non-coherent system. [0003] The previous research results show that the first two uncertain factors of the radiation source can be effectively compensated by the matched filter, and the compensation co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41H03H17/02
CPCG01S7/41H03H17/0201H03H17/0219H03H2017/0222
Inventor 汪海波黄文华姜悦巴涛邵浩谢少毅
Owner NORTHWEST INST OF NUCLEAR TECH