本論文提出一種干擾策略透過應用各式干擾訊號針對聯合戰術情報分配系 統(Joint Tactical Information Distribution System, JTIDS)的同步訊號進行干擾。如 同其他的無線通訊系統，JTIDS 亦需要同步機制，無論通道所造成的傳輸延遲長 短，系統內接收機可正確的偵測由傳送機發射的訊號的起始點。未來的電子戰中， 通訊系統扮演著重要的角色。如果可以阻斷敵軍的戰場通訊，將可提升戰爭的勝 率。
本論文針對 JTIDS 的同步訊號，透過施以不同的干擾訊號，進行位元錯誤率 的效能分析。干擾 JTIDS 同步訊號的策略為於一定時間內透過短時傅立葉轉換 偵測同步訊號的頻率，隨後並將逐漸估測出來的頻率應用於各式干擾方式中。藉 由不同的干擾方式，包括:寬頻干擾、多音干擾、連續型拂頻干擾、步階型拂頻 干擾與步階型寬頻拂略干擾，分析在不同的干擾功率、干擾頻點數與干擾頻寬下， 所造成的同步時間誤差與其相對應的位元錯誤率。
基於模擬可觀察到三個重要的結果，首先，連續型拂頻干擾單一個同步頻點 時，便可產生干擾成效;再者，寬頻干擾可造成最大的位元錯誤率效能;最後， 相較於其他干擾訊號，多音干擾在相同的干擾效能下，其所需的干擾功率最低。 本研究對軍事通訊系統發展具有參考價值。

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.

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