Missile-borne Sar Interfere With Anti-jamming Simulation And Software Development

Combined Synthetic radar (SAR) imaging technology with radar seeker technology, using fast imaging technology and scene matching technology get the precise location of the missile real-timely and correct the trace of the missile. This is one of the effective approaches to improve the ballistic missile terminal guidance precision. Radar As military applications, the missile SAR electromagnetic against should not be neglected. And different from other systems, the missile SAR system actual against experiment is not easy. Establish a complete set of the missile SAR interference anti-interference simulation software can save large amount of cost also facilitate execution. This paper presents the corresponding software overall design structure and module design,And gives the software results. The model of the missile SAR against contain three main parts: Imaging model, interference anti-interference model and evaluation model. This paper research and analyses the typical of the missile SAR model at present and add them into the software model library. These contain:Imaging and evaluation model: Scene matching is taking in the short time, when the missile flies into its plain trace again. The missile can be regarded as taking a uniform rectilinear movement. So the paper uses the strip imaging mode. First based on the reflect wave model of the SAR, deduce the SAR echo expression. Then according to the missile imaging geometric model, get the oblique distance model. And take the oblique distance model and the missile SAR characteristics into account. This article chooses the corresponding imaging algorithm, and describes the distance Doppler(RD) imaging algorithm briefly. And made the corresponding imaging simulation, then combining the SAR imagery characteristic analysis the corresponding evaluation method, also made the corresponding simulation.Interference anti-interference model: The active disturbance suppressing noise: am, FM, phase-modulation noise interference and RF noise interference. Active deception jamming and passive interference disturbance: chaff clouds, corner reflector. The anti-interference chose dual channel cancellation belongs to the Receiving front-end anti-interference, and image domain anti-interference of wavelet image domain anti-jamming. And made the corresponding simulation and analysis.