提高高频雷达带宽的多载波技术研究

裴炳南; 高晓兵; 张颖光

提高高频雷达带宽的多载波技术研究

1.
大连大学信息工程学院, 辽宁大连 116622
2. 国防科学技术大学电子科学与工程学院, 湖南长沙 410073

详细信息

作者简介:
裴炳南(1956-),男,河南人,博士,教授。IEEE高级会员,中国通信学会会士,中国电子学会高级会员。大连海事大学信息与通信系统学科博士生导师(兼职);高晓兵(1987-),女,河南人,大连大学计算机应用技术研究生,从事无线通信技术方向研究;张颖光(1973-),男,陕西人,博士,国防科学技术大学电子科学与工程学院讲师。主要研究方向:信号检测与估计、通信信号处理。

通信作者:
高晓兵 E-mail:gxb870321@163.com

中图分类号: TN957.51
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出版历程
- 收稿日期: 2010-12-13
- 网络出版日期: 2020-12-30
- 发布日期: 2011-10-30

MC technique to improve the bandwidth of HF radar

1.
School of information engineering, Dalian University, Dalian Liaoning 116622, China
2. School of Electronic Science and Engineering, National University of Defense Technology, Changsha Hunan 410073, China

摘要

摘要: 天波雷达工作在高频段,其工作带宽受电离层特性和人工信号干扰的限制,工程信号带宽一般只有十几千赫兹。利用多输入多输出(MIMO)原理,研究发射一组正交多载波调制的带宽为十几千赫兹的线性调频(LFM)信号照射目标,在接收端经匹配滤波和等效发射波束成形技术重建这一组回波信号成宽带信号,以增大雷达系统信号带宽。理论分析表明:在不考虑高频雷达多模多径情况下,发射N个频率间隔f_p=B的正交多载波调制LFM信号,在接收端采用匹配滤波和空时信号处理技术,将使接收信号带宽提高大约N倍。采用Watterson短波信道模型的仿真结果验证了理论分析的正确性。这表明在高频雷达多径环境不严重时,采用该方法可以提高雷达的距离分辨力。
- 距离分辨力 /
- 匹配滤波 /
- 多输入多输出雷达 /
- 正交多载波
Abstract: Sky-wave radar works on the high frequency band, the working bandwidth of which is often limited by interference of ionosphere characteristics and artificial signals. The bandwidth of engineering signal is generally around ten thousands Hertz. This paper proposes a technique of improving the signal bandwidth of this kind of radar system. The technique sends a group of orthogonal multicarrier(MC) modulated linear frequency modulated(LFM) signals with ten thousands Hertz bandwidth each to illuminated targets, and then composites matched filtering signal group to a broadband signal at the receiver. Without the consideration of multimode and multipath circumstances of a HF radar, sending N orthogonal MC modulated LFM signals and synthesizing them after matched filtering and space time processing at a receiver will improve signal bandwidth approximately by N times. Simulations by using Watterson sky-wave channel model are given to demonstrate the theoretical analysis. In conclusion, this technique can improve the distance resolution of a HF radar when the HF radar multipath environment is not serious.
- rang resolution /
- matched filter /
- multi-input multi-output(MIMO) radar /
- the orthogonal MC

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参考文献(11)

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