Semi-active radar seeker and signal processing method thereof
A radar seeker and signal processing technology, which is applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, measurement devices, etc., can solve the problems of large noise floor of echo receiving circuit and difficult to meet the use requirements of signal system, etc. Achieve the effect of improving processing speed, improving detection speed, and optimizing work sensitivity
Active Publication Date: 2014-03-26
江南机电设计研究所 +1
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[0004] At the same time, the existing semi-active radar seeker echo receiver adopts multi-stage amplifier cascading such as high-frequency amplification filter and intermediate frequency amplifier, which introduces a large base noise to the echo receiving circuit, and the noise figure is above 10dB. If the existing echo receiver system is adopted, the operating sensitivity corresponding to the echo signal accumulation of 1ms by the echo receiver can only reach -150dBW, which is difficult to meet the use requirements of the signal system
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[0024] The content of the present invention will be further described in detail in the form of embodiments below, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, all according to the field Various modifications, substitutions and alterations made by ordinary technical knowledge and conventional means are all included in the scope of the present invention.
[0025] Such as figure 2 , image 3 As shown, a semi-active radar seeker includes a direct wave receiver composed of a direct wave antenna 1, a frequency-locked loop 2, and a wave detector 3 arranged in parallel, and an echo antenna 4 and an echo receiver. The front stage 5 and the intermediate frequency processing unit 6 are connected in sequence to form an echo receiver; the frequency-locked loop 2 includes a mixer 21, an intermediate frequency amplifying f...
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The invention provides a semi-active radar seeker and a signal processing method thereof. According to the method, a frequency locking direct wave receiver system is adopted, a low noise high-frequency amplifier is additionally arranged at the preceding stage of an echo receiver, a direct wave receiving loop uses a memory maintaining method and an echo receiving loop uses a projectile velocity compensation extrapolation method and an extraction method of digital quadrature modulation-demodulation angle errors at the break-in period of illuminating signals, the detection rapidity of direct wave signals and echo signals is improved, the working sensitivity of the echo receiver is optimized under the condition of ultrashort continuous irradiation time, and the processing rapidity of the echo signals is improved.
Description
Technical field [0001] The invention belongs to the field of semi-active radar seeker design, and particularly relates to an overall design method for a semi-active radar seeker capable of quickly and effectively intercepting and tracking targets under the condition of ultra-short continuous irradiation time. Background technique [0002] The semi-active radar seeker is a device that detects and tracks the target by receiving the signal from the ground signal system reflected by the target. It can be seen that the effective detection of the target by the semi-active radar seeker depends on the ground signal system. With the development of various electronic technologies, the radar that illuminates the target for a long time is very easy to be found by the other party and reacts against its own side. Therefore, the continuous exposure time should be shortened as much as possible. In this case Therefore, how the semi-active radar seeker can quickly complete the effective intercepti...
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IPC IPC(8): G01S13/30
CPCG01S7/021G01S7/354G01S7/41
Inventor 田仁强唐志刚张淑琴谢洪泽桑隽永蔡猛辛增献李世平王诗琴赵丹
Owner 江南机电设计研究所