Research On Radar Anti Jamming And Clutter Suppression Based On Data Stream

Radar signal processing system is the "brain", which is directly related to the performance of radar target detection. So this paper presents a radar signal processing system with data flow control. It is more simple and more favorable for engineering implementation.In signal processing, there are some parts, such as pulse compression, clutter suppression and signal detection, because the clutter signal is ubiquitous, and the clutter signal is more important than the target. Often use the clutter inhibition MTI, AMTI, MTD and clutter map and mode, this paper in foundation engineering example, introduces the project to achieve the effect of MTI and AMTI the MTI mainly for static clutter, such as trees, buildings, etc.; AMTI has double notch, not only prevent static clutter and of clouds and other Dynamic Clutter has inhibitory effect.In modern radar, the interference and anti interference is a pair of contradictions, with the rapid development of micro electronics technology, the interference and interference of the radar is also becoming more and more diverse, and the processing is more complex. In order to better protect the Allied radar performance, first of all to study all kinds of interference signal characteristics, this paper from the passive jamming and active interference analysis of two aspects of common interference signal. Passive jamming in the most common is the chaff jamming can be used AMTI filter; active jamming and covering common mode interference is interference noise, the general use of jamming noise signal the target submerged in noise, deceptive jamming to form more can respectively from the distance, speed and angle parameters of the target interference, can also use a variety of target parameters simultaneously with interference, such interference in radar countermeasures are also common.Because of the narrow range of the main lobe of the radar, the sidelobe is wider, so the interference signal is more likely to enter the radar receiver. The side lobe cancellation loop and closed loop two algorithms, the closed-loop algorithm is LMS algorithm, the open loop algorithm is represented by DMI algorithm, because the DMI algorithm is simple and fast convergence, in the engineering implementation using DMI algorithm.The last part of this paper mainly introduces the hardware platform and the hardware platform of the sidelobe suppression and the hardware implementation of the corresponding algorithm. In the end, the processing effect is also good.