The Integrative Application of Anti-Jamming Technology for Radar

Abstract

This paper analyzed some primary techniques of anti-jamming technology for radar. Simulation results show the merit of each method. And it proposed a new idea that combines some typical anti-jamming techniques together. It was a more effective way of the integrative anti-jamming technology. Keywords-Pulse repetition frequency; transmitting power; polarization filter; comprehensive using I. FOREWORD Responding to the development of the radar, many kinds of Anti-radar detection measures and jamming technology have been designed one after another which lead to the operating environment of the military radars becomes worse and has a worse impact on the survival and the performance of the radar. The current radar is facing serious issues like "Four threats". In order to develop and survive in the current environment, the radar must have some breakthrough in the theory and the system. So the first research problem of the ECCM is the radar application under the jamming[1][2].Radar anti-jamming technology has two parts -the anti-jamming techniques and the avoid-jamming techniques.In order to work more efficiently, the radar needs to give an overall consideration and application on these two parts.There are more than one hundred anti-jamming measures nowadays which are concentrate on waveform selection countermeasure, power countermeasure, frequency-domain countermeasure, polarization countermeasure and clutter suppression ect. [3][4]. These measures not only include the anti-jamming techniques improving but also the radar tactical's rational consideration and application. According to the characteristic of these techniques, this paper combined these typical techniques together, and this can exert radar's performance efficiently. II. RADAR ANTI-JAMMING TECHNOLOGY A. the choosing of the PRI The choosing of the PRI is crucial to radar's anti-jamming. Different PRIs have different anti-jamming performance. So choosing a better PRI is the first consideration for radar's anti-jamming performance. For the hostile party, the radar signal detection is the premise of jamming., We can implement the best efficiency jamming on condition that we detect the PRI exactly.Assumed the PRI of the pulse signal we launched is a constant and it is 300us. The hostile scout not only can intercept our emitter signal, but also intercept a pulse signal which PRI is 230us and it's span is 10%. In order to offer jamming reference, the scout need to sort and recognize them after received this signals. If the scout sort and recognize the signal based on the PRI, using PRI transformation arithmetic to process the pulse signal. At last we got fig 1. From the fig 1, we know that the PRI of the received signals are 230us and 300us respectively. This message offer a impactful help to implement the jamming and put our radar at a disadvantage place in anti-jamming.If our emitter signal is a pulse signal whose PRI is 300us and span is 20%, the scout used PRI transformation algorithm to process the pulse signal. Then we get fig 2. From the fig 2, 978-1-4244-5...

Jamming Effectiveness Evaluation Based on Radar Detection Probability

“…Radar detection distance without jamming [9] (1) In equation 1, the specific meaning of different parameters is: t P : The power of the radar transmitter; t G : The gain of the radar send antenna; r G : The gain of the radar receive antenna;  : Radar cross section of target;  : Wavelength of the electromagnetic wave;…”

“…The research of jamming effectiveness evaluation based on radar detection range has achieved good achievement. References [1][2][3][4] studied the changes of radar detection range in the condition of oppressive jamming, eventually analysed and evaluated the jamming effectiveness. References [5] combined radar distance formula and jamming equation, putting forward two kinds of jamming suppression factor to evaluate jamming effectiveness.…”