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清华大学学报(自然科学版)  2015, Vol. 55 Issue (8): 866-872    
  电子工程 本期目录 | 过刊浏览 | 高级检索 |
抗部分频带干扰的交织跳扩系统设计及其容量分析
任印鹏1, 倪祖耀2, 匡麟玲3, 吴胜3, 陆建华1,3
1. 清华大学 电子工程系, 北京 100084;
2. 清华大学 信息技术研究院, 北京 100084;
3. 清华大学 宇航技术研究中心, 北京 100084
Anti partial-band noise jamming interleaved hybrid spread spectrum system design and capacity analysis
REN Yinpeng1, NI Zuyao2, KUANG Linling3, WU Sheng3, LU Jianhua1,3
1. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
2. Research Institute of Information Technology, Tsinghua University, Beijing 100084, China;
3. Tsinghua Space Center, Tsinghua University, Beijing 100084, China
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摘要 为提高抗部分频带干扰的能力, 在直接跳扩(DS/FH)的基础上提出一种交织跳扩(IDS/FH)系统, 引入多跳间交织器实现码片的离散化, 获得时频分集增益。通过将部分频带干扰下的跳扩系统等效为衰落条件下的单输入多输出(SIMO)系统, 分别对DS/FH和IDS/FH的信道容量进行分析, 得出部分频带干扰和高斯信道下的容量表达式, 并给出了IDS/FH在部分频带干扰下的最佳接收方案。理论分析得出, 在50%的强部分频带干扰, 信噪比为10 dB的Gauss信道下, IDS/FH的容量比DS/FH的提高49%。仿真结果表明: 50%部分频带干扰下IDS/FH可达到的最低误码率比DS/FH的降低2个数量级。
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任印鹏
倪祖耀
匡麟玲
吴胜
陆建华
关键词 跳扩技术部分频带干扰单输入多输出系统交织信道容量    
Abstract:Anti partial-band noise jamming (PBNJ) is improved by an interleaved direct sequence/frequency-hopping (IDS/FH) system based on the traditional direct sequence/frequency-hopping (DS/FH) spread spectrum method. An interleaver crossing multiple hops improves the time-frequency diversity gain. The system capacities with PBNJ are compared to a single-input multiple-output (SIMO) system with additive Gaussian white noise (AWGN) in a fading environment. An optimum IDS/FH receiver is also given. Theoretical analyses indicate that, when the PBNJ occupies 50% of the entire frequency band and the SNR is 10 dB, the IDS/FH capacity is 49% higher than that of DS/FH. Simulations show that the achievable lowest bit error rate of IDS/FH is two orders of magnitude lower than that of DS/FH with 50% PBNJ.
Key wordsdirect sequence/frequency hopping    partial-band noise jamming    single-input multiple-output system    interleave    channel capacity
收稿日期: 2014-12-05      出版日期: 2015-09-30
ZTFLH:  TN914.43  
通讯作者: 匡麟玲,副研究员,E-mail:kll@tsinghua.edu.cn     E-mail: kll@tsinghua.edu.cn
引用本文:   
任印鹏, 倪祖耀, 匡麟玲, 吴胜, 陆建华. 抗部分频带干扰的交织跳扩系统设计及其容量分析[J]. 清华大学学报(自然科学版), 2015, 55(8): 866-872.
REN Yinpeng, NI Zuyao, KUANG Linling, WU Sheng, LU Jianhua. Anti partial-band noise jamming interleaved hybrid spread spectrum system design and capacity analysis. Journal of Tsinghua University(Science and Technology), 2015, 55(8): 866-872.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I8/866
  图1 两种跳扩频技术系统框图
  图2 三种跳扩频技术波形示意图
  图3 强部分频带干扰下理论容量
  图4 不同交织器长度下部分频带干扰下容量
  图5 BPSK 调制,在不同λ 下的信道容量
  图6 BPSK 调制无编码在部分带干扰下的误码性能
  图7 BPSK 调制Turbo码在部分带干扰下的误码性能
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