Performance Analysis of JTIDS with Interference on Synchronization Signal

• Main Authors: Xiao-Ping Ho, 賀孝平
• Other Authors: Hsin-Chin Liu
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/8s67h2

碩士 === 國立臺灣科技大學 === 電機工程系 === 107 === In this work, we study a strategy to apply various jamming signals on the synchronization signals of a Joint Tactical Information Distribution System (JTIDS). Synchronization is necessary in a JTIDS like other wireless communication systems, so that the receiver can correctly detect the begin of the signals transmitted from a transmitter regardless the channel propagation delay. In future electronic wars, a communication system plays an important role. If one can barrage the enemy’s battlefield communications, they can improve the odds significantly. In this work, we analyze the performance of the JTIDS communication in terms of bit error rate (BER) by applying various jamming signals on the synchronization signals of the JTIDS. The strategy of jamming the JTIDS is to detect the frequencies of synchronization signals through Short Time Fourier Transformation (STFT) in a certain time interval, and then to apply various jamming signals on the detected frequencies gradually. We analyze the synchronization time error and the corresponding BER caused by the jamming signals with different jamming powers, jamming frequencies, and jamming signal bandwidth via different jamming methods including the Noise Frequency Modulation Jamming, the Multi-Tone Jamming, the Continuous Chirp Jamming, the Step Chirp Jamming, and the Step Full Band Sweep Jamming. Three important observations are found based on the simulation results. The first, the Continuous Chirp Jamming can achieve useful jamming effect even just in a single frequency band. The second, Noise Frequency Modulation Jamming can maximize the jamming performance in terms of BER. The third, the Multi-Tone Jamming requires minimal jamming power to obtain the same jamming effects compared with other methods. This study has the value of reference for development of military communication systems.