Wide and narrow orthogonal pulse compensation method for pulse radar

An orthogonal pulse and pulse radar technology, which is applied in the radar field, can solve the problems of additional pulse radar time resource occupation and radar detection performance impact, and achieve the effect of avoiding time overhead and saving time resources

Inactive Publication Date: 2013-03-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Therefore, the use of narrow pulse blind filling will occupy additional valuable time resources of pulse radar, which will affect the detection performance of radar (such as data rate, etc.)

Method used

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  • Wide and narrow orthogonal pulse compensation method for pulse radar
  • Wide and narrow orthogonal pulse compensation method for pulse radar
  • Wide and narrow orthogonal pulse compensation method for pulse radar

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Embodiment Construction

[0015] This embodiment uses pulse radar as a platform.

[0016] A pair of wide pulse and narrow pulse used as the emission pulse is set such that the wide pulse precedes and the narrow pulse follows. In this way, it can be ensured that the blind area after blind filling is a narrow pulse blind area.

[0017] According to the relevant technical requirements of the radar, design the emission pulse width and period:

[0018] In this embodiment, the S-band is selected, the maximum operating range of the radar is 100 km, and the short-distance blind area requirement is 100 m after blind filling. The selected wide pulse width is τ 1 =100μs, emission pulse repetition period 1ms, narrow pulse width τ 2 =0.5μs, the time interval between the wide pulse and the narrow pulse is Δt, since the time interval Δt between the wide pulse and the narrow pulse no longer needs to receive the target echo, it can be zero. Then the maximum unambiguous distance of the radar is 150km, and the blind ...

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Abstract

The invention provides a wide and narrow orthogonal pulse compensation method for pulse radar. A pair of a wide pulse and a narrow pulse which are subjected to orthogonal modulation is emitted for each pulse repeated period, and then an accepting state is switched to; the wide pulse is in the front and the narrow pulse is at the rear in the pair of the wide pulse and the narrow pulse; and in the accepting state, an echo signal of the wide pulse and an echo signal of the narrow pulse, which are overlapped in time, are separated, by means of matching filers corresponding to the wide pulse and the narrow pulse respectively. According to the wide and narrow orthogonal pulse compensation method, after the wide pulse is emitted, the narrow pulse is directly emitted, receiving time of wide pulse echo is not required to be reserved, and the time interval of each pair of the wide pulse and the narrow pulse is zero or extremely short so that precious time resources are saved and not used, and additional time expenses are avoided.

Description

technical field [0001] The invention relates to short-distance blind compensation for pulse radar in the technical field of radar. Background technique [0002] Due to the occlusion of the transmitted pulse signal, the pulse radar cannot receive the echo of the close-range target, resulting in the inability to detect the close-range target. This is the short-range blind spot problem of the pulse radar. [0003] At present, there are a variety of pulse radar blinding methods, the most commonly used method is the wide and narrow pulse blinding method, that is, the wide and narrow pulses are alternately transmitted by frame or pulse, and the wide pulse is used for long-distance target detection. Short-distance target detection, complete the blinding of the wide pulse short-distance blind area. In this method, the target echo signals of wide and narrow pulses are separated in time: that is, wide and narrow pulses are transmitted alternately. After the wide pulse is transmitted,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28
Inventor 邹林崔明雷钱璐于雪莲周云汪学刚
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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