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Pulse waveform for field surveillance radar

A surface surveillance radar and pulse waveform technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of increasing the volume, weight, cost of the transmitting module, and low duty cycle of the transmitted signal, saving radar antennas, multi-target resolution, etc. The effect of strong capability and low transmit peak power

Inactive Publication Date: 2012-07-04
中国航空工业第六〇七研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the duty cycle of the transmit signal with narrow pulse waveform is extremely low. Under the condition that the surface surveillance radar must be guaranteed to reach the effective range, the average power of the radar must be increased by increasing the peak transmit power, and the increase of the transmit peak power is bound to Causes the volume, weight and cost of the launch module to increase

Method used

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  • Pulse waveform for field surveillance radar
  • Pulse waveform for field surveillance radar
  • Pulse waveform for field surveillance radar

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Experimental program
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Effect test

Embodiment 1

[0012] The pulse waveform is composed of a narrow pulse and a wide pulse alternately. A pulse waveform cycle is composed of a cycle of narrow pulses and a cycle of wide pulses. The narrow pulse is composed of a single carrier frequency sine wave signal. The pulse width of the narrow pulse τ1 = 40ns , the period of the narrow pulse T=62.5μs; the wide pulse is composed of a chirp signal, the pulse width of the wide pulse τ2=6μs, the bandwidth of the wide pulse B=25MHz, and the period of the wide pulse is T.

Embodiment 2

[0014] The pulse waveform is composed of a narrow pulse and a wide pulse alternately. A pulse waveform cycle is composed of a cycle of narrow pulses and a cycle of wide pulses. The narrow pulse is composed of a single carrier frequency sine wave signal. The pulse width of the narrow pulse τ1 = 20ns , the period of the narrow pulse T=300μs; the wide pulse is composed of a chirp signal, the pulse width of the wide pulse τ2=1μs, the bandwidth of the wide pulse B=50MHz, and the period of the wide pulse is T.

Embodiment 3

[0016] The pulse waveform is composed of a narrow pulse and a wide pulse alternately. A pulse waveform cycle is composed of a cycle of narrow pulses and a cycle of wide pulses. The narrow pulse is composed of a single carrier frequency sine wave signal. The pulse width of the narrow pulse τ1 = 80ns , the period of the narrow pulse T=50μs; the wide pulse is composed of a chirp signal, the pulse width of the wide pulse τ2=20μs, the bandwidth of the wide pulse B=12.5MHz, and the period of the wide pulse is T.

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Abstract

The invention belongs to the technology of radar waveform design and relates to an improved pulse waveform for a field surveillance radar. The improved pulse waveform is characterized in by comprising narrow pulses and broad pulses alternately one by one; and one pulse waveform period is composed of one period of narrow pulse and one period of broad pulse, wherein the narrow pulse is composed of single-carrier frequency sine wave signals. The pulse waveform has the advantages of less amount of needed equipment, strong multi-target resolution capacity and low emission peak power.

Description

technical field [0001] The invention belongs to the radar waveform design technology and relates to the improvement of the radar pulse waveform used for scene monitoring. Background technique [0002] Surface surveillance radars are generally installed on airport towers to monitor targets such as aircraft and vehicles within the near-ground range and extract information such as distance and azimuth of the targets. The operating range of surface surveillance radar is generally limited to the near-ground range near the airport, and has the advantages of high positioning accuracy, fast data refresh rate, and high reliability. Due to the high range resolution requirements of surface surveillance radar, in order to obtain high range resolution, linear frequency modulation continuous waveform or narrow pulse waveform is usually used. The chirp continuous wave can obtain high range resolution through a large chirp bandwidth. At the same time, the continuous wave signal has lower r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/282
Inventor 郝志梅曹兰英刘洋涛
Owner 中国航空工业第六〇七研究所
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