| 基于速率增强JTIDS波形的干扰检测与擦除方法 |
| 张彧1, 吴钊1, 宋健1,2 |
| 1. 清华大学 电子工程系, 清华大学信息科学与技术国家实验室, 北京 100084; 2. 深圳市数字电视系统重点实验室, 深圳 518000 |
| Jamming detection and erasing method based on the rate-enhanced JTIDS waveform |
| ZHANG Yu1, WU Zhao1, SONG Jian1,2 |
| 1. Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; 2. Shenzhen City Key Laboratory of Digital TV System, Shenzhen 518000, China |
摘要:
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| 摘要联合战术信息分发系统(JTIDS)是一种应用广泛的态势感知数据链。为解决速率增强JTIDS波形在部分频带阻塞干扰下性能恶化的问题, 该文提出了一种低复杂度的干扰检测与擦除策略。首先对每个脉冲的信噪比(SNR)进行估计, 并对脉冲进行粗分类。接着, 估计出整个时隙内普通脉冲的平均SNR。最后, 对脉冲进行精细分类, 并依据一定的策略给每个脉冲赋予一个擦除因子。仿真表明: 该方法能极大减小部分频带阻塞干扰对解调性能的影响, 显著降低误码率。该方法复杂度低, 易于实现。 | |||
| 关键词 ：速率增强联合战术信息分发系统,干扰检测,擦除因子,信噪比估计 | |||
| Abstract：Joint tactical information distribution system (JTIDS) is a kind of widely used situational awareness data-link. To solve the performance deterioration problem of the rate-enhanced JTIDS in the presence of partial-band barrage jamming, a low complexity method for interference detection and erasure is proposed. First of all, the signal-to-noise ratio (SNR) of each pulse is estimated and the pulse is classified roughly. Then, the average SNR of all the normal pulses in the time slot is estimated. Finally, a fine pulse classification is performed, and each pulse is given an erasure-factor in a certain strategy. Simulation shows that this method greatly eases the effects of the partial-band barrage jamming on the reception performance and significantly reduces the bit error rate. The method is low complexity and easy to implement. | |||
| Key words：rate-enhanced joint tactical information distribution system (JTIDS)interference detectionerasure factorsignal-to-noise ratio estimation | |||
| 收稿日期: 2015-04-28 出版日期: 2015-09-30 | |||
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| 引用本文: |
| 张彧, 吴钊, 宋健. 基于速率增强JTIDS波形的干扰检测与擦除方法[J]. 清华大学学报（自然科学版）, 2015, 55(8): 821-825. ZHANG Yu, WU Zhao, SONG Jian. Jamming detection and erasing method based on the rate-enhanced JTIDS waveform. Journal of Tsinghua University(Science and Technology), 2015, 55(8): 821-825. |
| 链接本文: |
| http://jst.tsinghuajournals.com/CN/或 http://jst.tsinghuajournals.com/CN/Y2015/V55/I8/821 |
图表:
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| 图2 跳频通信中部分频带阻塞干扰示意图 |
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| 图1 增强型JTIDS波形传输模型简图 |
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| 表1 仿真参数 |
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| 图3 20％频带被阻塞干扰时1.1Mb/s波形的性能仿真 |
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| 图4 干扰检测和擦除方法对1.1Mb/s波形的性能影响 |
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| 图5 50％频带被阻塞干扰时550kb/s波形的性能仿真 |
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| 图6 干扰检测和擦除方法对550kb/s波形的性能影响 |
参考文献:
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