Research On Highly Efficient Interference Technic Of OFDM

As an important component of modern warfare, communication confrontation plays an increasing decisive role in the war. Because of the characteristics such as high spectrum utilization, anti-multipath interference and strong anti-frequency selective fading, the orthogonal frequency division multiplexing(OFDM) technology has been successfully applied in different standards and becomes the key technology of fourth generation mobile communication system. Therefore, the interference in the OFDM system has been the focal point in communications confrontation. The study on effective interference in OFDM system is very important.This thesis imposes several traditional interference methods (wideband noise interference, partial-band jamming and pulse jamming) and tone interference methods on OFDM system. The interference effects of the methods above show that the tone interference play a better performance than the traditional methods. Therefore, the single-tone jamming and multi-tone jamming is researched in this thesis. Based on the theory of existing communication interference, the principle of adding single-tone or multi-tone signals on OFDM system and the different interference effect of adding different conditions of single-tone or multi-tone signals on the OFDM system is discussed in this thesis. Simulation results verify the theoretical analysis is correct and the results can be further applied to practice.