An Approach to Achieving Narrower Mainlobe for MIMO Radar
-
摘要: 介绍了一种获得更窄主瓣虚拟收发波束的方法。该方法通过天线阵元发射正交编码的波形,然后在接收端对回波信号进行处理。MIMO雷达由于靠稀疏阵列避免旁瓣的不利影响,所以可提高角分辨率和多普勒分辨率。但受到如空间、成本或者其他实际因素的限制,须将阵列布置成紧凑阵列,而紧凑阵列对低速目标检测效果较差。通过提出的加窗方式,紧凑阵列利用虚拟收发波束形成可获得更窄的主波束,提高对低速目标的检测效果。通过仿真验证,对归一化频率为0.062 5的低速目标,信干噪比提升系数(SINR IF)约提升7.3 dB。
-
[1] BROOKNER E, RAYTHEON C. MIMO radar demystified and where it makes sense to use[C]//Phased Array Systems&Technology. Waltham, USA: IEEE, 2013. [2] MOO P W, ZHEN Ding. Tracking performance of MIMO radar for accelerating targets[J]. Signal Processing, 2013, 61(21): 5205-5216. [3] RANKIN G A, TIRKEL A Z, BUI L Q, et al. Radar imaging: Conventional and MIMO[C]//Communications and Electronic(ICCE). Hue, USA: IEEE, 2012. [4] HE Qian, LEHMANN N H, BLUM R S, et al. MIMO radar moving target detection in homogeneous clutter[J]. IEEE Transactions on Aerospace and Electronic Systems, 2010, 46(3): 1290-1301. [5] 牛朝阳, 张剑云. MIMO雷达正交波形集设计—线性调频-位编码混合波形[J]. 计算机工程与应用, 2012, 48(13): 133-137. NIU Zhao-yang, ZHANG Jian-yun. Orthogonal waveform set of hybird LFM and phase code for MIMO radar[J]. Computer Engineering and Application, 2012, 48(13): 133-137. [6] RABIDEAU D J. Non-adaptive multiple-input, multiple- output radar techniques for reducing clutter[J]. IET Radar Sonar Navig, 2009, 3(4): 304-313. [7] 杜晓林, 王旭, 苏涛, 等. MIMO雷达正交相位编码信号的代数设计方法[J]. 西安电子科技大学学报(自然科学版), 2014, 41(2): 64-70. DU Xiao-lin, WANG Xu, SU Tao, et al. Orthogonal phase coding signal design for MIMO radar via an algebraic method[J]. Journal of Xidian University(Natural Science Edition), 2014, 41(2): 64-70. [8] CHEN Chun-yang, VAIDYANATHAN P P. Beamforming issues in modern MIMO radars with doppler[C]//The 40th Asilomar Coference on Signals, Systems and Computers. Pacific Grove, CA, USA: IEEE, 2006. [9] FORSYTHE K W, BLISS D W. MIMO radar signal processing[M]. New York, USA: Wiley, 2009. [10] DENG Hai, BRAHAM H. A virtual antenna beamforming (VAB) approach for radar systems by using orthogonal coding waveforms[J]. IEEE Transactions on Antennas and Propagation, 2009, 57(2): 425-435. [11] WANG Guo-hua, LU Yi-long. Clutter rank of mimo radar with a speical class of waveforms[C]//Waveform Diversity and Design Conference. Kissimmee, FL, USA: IEEE, 2009. [12] MONDAL B, HEATH R W. Performance analysis of quantized beamforming MIMO systems[J]. IEEE Trans Signal Process, 2006, 54(12): 4753-4766. [13] CHEN Chun-yang, VAIDYANATHAN P P. MIMO radar space-time adaptive processing using prolate spheroidal wave functions[J]. IEEE Transactions on Signal Processing, 2008, 56(2): 623-635. [14] 周剑雄, 石志广, 吴京. 离散时间信号频域分析中的概念辨析[J]. 电气电子教学学报, 2014, 36(1): 49-51. ZHOU Jian-xiong, SHI Zhi-guang, WU Jing. Conceptual discrimination in frequency domain analysis of discrete time signals[J]. Journal of EEE, 2014, 36(1): 49-51.
点击查看大图
计量
- 文章访问数: 13001
- HTML全文浏览量: 595
- PDF下载量: 1075
- 被引次数: 0