Radar Identification Reconnaissance Interference Simulation Technology

With the development and application of electronic technology and informational technology, the modern field is no longer the world of massive lethal weapons. Actually, in the early stage of large-scale war, electronic war has already quietly started and turned into a sharp sword which can decide the whole battle field. During electronic war, IFF has been playing an important role. The existing of IFF system is crucial in helping discriminating the friend and foe troops so as to provide electronic protection for our troops and conduct electronic interference or electronic deception to the enemy.The key points and also the difficulties of IFF system are as follows: IFF signal recon and identification,IFF signal interference methods and IFF signal anti-interference methods which are the primary technologies of electronic countermeasure and electronic information war. The thesis, based on the research of IFF theory and the analysis of IFF simulation signal format, introduces two types of sorting algorithm including Dynamical Correlation and PRI's transforming into two signals in terms of how to investigate and discriminate IFF signals within the signal net woven from radar signal, communication signal, etc. After the simulation experiments of different signal modes, the application scope and the merits and demerits of the application are concluded. The IFF system has introduced blocking blind interference method and the existing technology gives unstable signal thus has unobvious effect when it is used to interfere IFF mode S signal. Despite such problems, a new interference method based on Pseudo-Random Sequence m---PRCPM enquiry interference method is presented. This method has high random and is easy to achieve. Because of its concentrated interference and cheating interference to receiver, it has more advantages compared with traditional methods. The recon and identification method of IFF system and the design and research of interference algorithm of signals have not only practical significance but also military reference value.Therefore,based on Secondary radar IFF system structure theory, this article conducts research on IFF system signal format, the algorithm of Reconnaissance Recognition and the algorithm of improve interference,meanwhile, have a simulation experiment,It consists of the following aspects:(1) Analysis of the working principle of the IFF system and the key technology,and Put forward the identification of the jamming system simulation structure. For basic system model of the signal analysis format.And put forward waveform analysis and simulation experiment, get IFF signal formats with signal characteristics, To provide the necessary conditions of the deeper research.(2) For IFF reconnaissance identification method research, million radar signal stream of pulses environment is generated by the simulation, introduced into dynamic relationship and PRI transform two signal sorting algorithm, evaluate the effectiveness according to the different pulse density of IFF and signal format, then to verify the trial scope and quality performance of two algorithms.(3) Research and analyse the interference effect when using block type blind interference measures for IFF, to solve the problem that present interference methods for IFF model S signal interference effect is not obvious, we put forward the PRCPM ask interference methods, through a lot of simulation experiments, it proved that the method for identification model S signal has a very good interference effect.