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Automatic Detection and Recognition of Ground-based Radar Station for Active Radar Seeker

Author: ChengYongQiang
Tutor: WangHongQiang
School: National University of Defense Science and Technology
Course: Information and Communication Engineering
Keywords: Anti-radiation missile Active radar seeker Ground radar station Phased array antenna Strong clutter detection Doppler beam sharpening Target recognition HRRP Extended target detection
CLC: TN957.51
Type: Master's thesis
Year: 2007
Downloads: 274
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Abstract


The complex system of active and passive medium-and long-range anti-radiation missiles, anti-radiation missile relative only passive seeker can greatly improve its anti-target radar shutdown ability and target selection capability is one of the development of the anti-radiation missiles. Active radar seeker ground radar detection and recognition technology is to improve the performance of critical missile combat technology. This paper briefly describes the research status of active anti-radiation seeker ground radar detection and recognition technology, summed up one of the key technologies, described the research background and the main work. And electromagnetic scattering from the target, target detection and target identification of three aspects of the system to study the electromagnetic scattering of the radar antenna modeling strong ground clutter ground radar target detection and radar antenna multi-feature fusion target recognition technology . The need for detection and identification, starting from the antenna of the electromagnetic scattering mechanism, the methods of analysis of the rotating parabolic reflector antenna and a slot array antenna RCS investigated RCS slot array antenna with the variation of the tablet size, a slot number and the incident band, and the identifying characteristics of the ground radar antenna are analyzed. The ground guided radar Doppler beam sharpening (DBS) technology to improve radar detection of ground targets technical difficulties, orientation to the ability to distinguish, by refining the resolution unit to improve the signal-to-noise ratio, thereby enhancing the seeker in strong ground clutter target detection capability. Ground guided radar ground clutter characteristics, minimum detection signal radar cross section and radar quantitative relationship between vertical and horizontal resolution; introduced the basic principle of the Doppler beam sharpening technology, focusing on the DBS scan imaging of key technologies; through continuous scan imaging, using a a subgraph (sequence of images) estimated target RCS sequence, then thought for identification of the target area. Estimated results based on the analysis of the identifying characteristics of the radar antenna and the target RCS sequence, active radar seeker ground radar target recognition technology. Given the overall framework of the ground radar target recognition, construct the four categories of characteristics of a phased array radar antenna, the recognition algorithm; proposed multi-feature fusion recognition algorithm based on the advantages and disadvantages of each characteristic; same time, recognition The results updated in real time and the most reliable identification of target selection issues were discussed. For non-scanning active radar seeker, the high resolution detection technology based on The HRRP the ground radar station antenna goal. High resolution scattering characteristics of the phased array radar antenna, the equivalent scattering centers extracted tablet and the slot, given its energy distribution; introduces the basic principles of the FM the stepper radar high-resolution imaging, and with like based on the distance of the antenna, antenna target imaging; studied antenna target radial direction of the single-cycle accumulation detection algorithms, and the accumulation of multi-cycle detection algorithm to derive the best detector structure, and the detection performance analysis. Anti-radiation seeker ground radar detection and recognition technology for active millimeter wave made a certain degree of exploratory research, technology development and the transformation of some of the equipment for multi-mode combined guidance system of the new anti-radiation missile weapons supported.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar equipment,radar > Radar receiving equipment > Radar signal detection and processing
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