在現代的戰爭中若能有效干擾或破壞敵軍的軍事通信系統，如聯合戰術情報分配系統(Joint Tactical Information Distribution System, JTIDS)之通信，將能輕易取得戰爭的勝利。
JTIDS採用了跳頻展頻、錯誤控制編碼等多項抗干擾的技術，使得該系統具有很強的抗干擾特性。
本論文針對全頻干擾(Full Band Jamming)、分頻干擾(Multitone Jamming)、拂頻干擾(Frequency Sweep Jamming)、寬頻拂略干擾(Broad Band Frequency Sweep Jamming)進行模擬，對JTIDS中單脈衝及雙脈衝封包格式之數據段進行干擾。
通過軟體模擬，分析上述干擾方式於不同訊雜比(Signal-to-Noise Ratio, SNR)及訊干比(Signal-to-Jamming Ratio, SJR)下對於碼片錯誤率(Chip Error Rate)、通道符號錯誤率(Channel Symbol Error Rate)、消息符號錯誤率(Information Symbol Error Rate)、位元錯誤率(Bit Error Rate)的影響。
而綜合目前蒐集到的相關文獻與本文目前的研究來看，在低訊干比時干擾分頻干擾、全頻干擾的干擾效果較佳，而拂頻干擾、寬頻拂略干擾的效果相對較差。此外，針對干擾不同頻點數的分頻干擾而言，在訊干比較低時，干擾較多頻點數能造成較高的位元錯誤率。而同樣在低訊干比時，若分頻干擾只干擾部分頻點，則對於雙脈衝封包格式較單脈衝封包格式將有更高的位元錯誤率。
由於不同情況下的干擾成效不盡相同，因此在實際應用上，仍應根據要求的錯誤率、環境的訊雜比、實際的干擾機成本、功率等因素，選擇相對應的干擾方法，以達到最好的干擾效益。

One can win a modern war easily by effectively interfering the enemy's warfare communication system such as the Joint Tactical Information Distribution System (JTIDS).
JTIDS uses many techniques like FHSS (Frequency Hopping Spread Spectrum), ECC (Error Control Coding), and so on, to enhance its anti-jamming capability.
In this work, we study applying various jamming signals including Full Band Jamming, Multitone Jamming, Frequency Sweep Jamming, and Broad Band Frequency Sweep Jamming, to interfere the data transmission of the single pulse packet and dual pulse packet in JTIDS.
We use computer simulations to analyze the chip error rate, the channel symbol error rate, the information symbol error rate, and the bit error rate (BER) under different levels of signal to jamming ratio (SJR) and signal to noise ratio (SNR).
The analyses indicate that Multitone Jamming and Full Band Jamming have better performance than Frequency Sweep Jamming and Broad Band Frequency Sweep Jamming in low SJR. Particularly for a fixed signal power Multitone Jammer, spreading its jamming power to more frequencies leads to higher BER at the low SJR conditions. In addition, the BER of a dual pulse packet is higher than that of a single pulse packet when the jamming signal power is high enough.
The performance of signal interference varies under different conditions. Thus, one should practically select the corresponding type of jamming signal based on the desired BER, the cost, and the power of jammer to get the greatest returns on investment.

[1] 梅文華 and 蔡善法, JTIDS/Link16數據鏈. 國防工業出版社, 2007.
[2] B. Sklar, Digital Communications. Prentice Hall, 2001.
[3] R. K. Deergha, Channel Coding Techniques for Wireless Communications. Springer Verlag, 2015.
[4] C. Kao, C. Robertson, and K. Lin, "Performance analysis and simulation of cyclic code-shift keying," in 2008 IEEE Military Communications Conference, San Diego, CA, 2008, pp. 1-6.
[5] 劉建民, 楊瑞娟, and 吳少林, "JTIDS數據鏈系統建模與性能分析," 空軍預警學院學報, 2009.
[6] S. Haykin and M. Moher, Communication System, 5 ed. Wiley, 2010.
[7] R. E. Ziemer and W. H. Tranter, Principles of Communications, 6 ed. Wiley, 2008.
[8] J. Proakis and M. Salehi, Digital Communications, 5 ed. McGraw-Hill Education, 2007.
[9] P. S. Stanley, Understanding Voice and Data Link Networking. Northrop Grumman Corporation., 2014.
[10] 馮小平 and 楊紹全, 通信對抗原理. 西安電子科技大學出版社, 2009.
[11] 鄧兵, 通信對抗原理及應用. 電子工業出版社, 2017.
[12] 李偉, "對Link16數據鏈的干擾技術研究," 西安電子科技大學, 2018.
[13] 姚超, "Link16數據鏈抗干擾技術研究及中頻信號源的實現," 重慶大學, 2015.
[14] 胡雁, "JTIDS對象研究及其干擾效能分析," 電子科技大學, 2010.
[15] 趙國慶, 雷達對抗原理, 2 ed. 西安電子科技大學出版社, 2012.
[16] R. A. Poisel, Modern Communications Jamming Principles and Techniques, 2 ed. Artech House, 2011.
[17] I. Sharp and K. Yu, "Wireless Positioning: Principles and Practice " 2018. Springer
[18] K. Pärlin, "Jamming of Spread Spectrum Communications Used in UAV Remote Control System," Tallinn University of Technology, 2017.
[19] C. Dong-Yeol, K. Won-Kyung, J. Kim, and C. Huirae, "Performance of analog and digital modulation schemes under sweep jamming," in 2016 Eighth International Conference on Ubiquitous and Future Networks (ICUFN), Vienna, 2016, pp. 13-15.
[20] 高其瀚, "Performance analysis of a JTIDS/link-16-type waveform transmitted over slow, flat Nakagami fading channels in the presence of narrowband interference," Naval Postgraduate School, 2008.
[21] S. W. Doyle and J. W. Marshall, "Performance of frequency hopped MSK signals in multitone jamming and additive white Gaussian noise," in IEEE Conference on Military Communications, CA, USA, 1990, pp. 415-419 vol.1.
[22] C. Sen, "Digital communications jamming," Naval Postgraduate School, 2000.
[23] 張宏欣, 王永斌, 劉宏波, and 衛澤, "JTIDS數據鏈在多音干擾下經過萊斯衰落信道的傳輸性能分析," 電信科學, pp. 59-64, 2012.
[24] I. Koromilas, C. Robertson, and F. Kragh, "Performance analysis of the LINK-16/JTIDS waveform with concatenated coding in both AWGN and pulsed-noise interference," in 2010 MILITARY COMMUNICATIONS CONFERENCE, San Jose, CA, 2010, pp. 2074-2081.
[25] H. Saarnisaari, "Sweep jamming hit rate analysis for frequency agile communications," in 2016 International Conference on Military Communications and Information Systems (ICMCIS), Brussels, 2016, pp. 1-6.
[26] C. Thumann, "Effectiveness of Electronic Counter Measures (ECM) on Small Unmanned Aerial Systems (SUAS): Analysis and Preliminary Tests," University of Oklahoma 2018.
[27] 嚴鵬濤, "Link16數據鏈及抗干擾技術研究," 西安電子科技大學, 2012.
[28] 秦蘆岩, "聯合戰術信息分發系統及其干擾技術研究," 武漢郵電科學研究院, 2015.
[29] 孫穎, "JTIDS系統及其干擾研究," 西安電子科技大學, 2006.
[30] 李鼎, 尹俊, and 謝井, "多頻點阻塞式干擾JTIDS系統方法分析," 指揮控制與仿真, pp. 121-124, 2013.
[31] 陳小康, "JTIDS的抗干擾性能研究," 北京交通大學, 2007.