- 0000年 7
- 期刊论文 7
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- Senior Member 2
- 吴仁彪 2
- and Zhigang Cao 2
- Fellow 2
- 清华大学,北京 2
- 中国民航大学,天津 2
- 西安电子科技大学,陕西 1
- 西北工业大学,陕西 1
- 东南大学,江苏 1
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【期刊论文】Co-Channel Interference Cancellation for Space-Time Coded OFDM Systems
曹志刚, Junqiang Li, Khaled Ben Letaief, Fellow, IEEE, and Zhigang Cao, Senior Member
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 2, NO.1, JANUARY,-0001,():
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关键词: Adaptive antenna arrays,, beamforming,, interference cancellation,, orthogonal frequency division multiplexing (, OFDM), ,, transmit diversity,, wireless data communications.,
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33浏览
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【期刊论文】Dynamic Spatial Subchannel Allocation With Adaptive Beamforming for MIMO/OFDM Systems
曹志刚, Ya-Han Pan, Khaled Ben Letaief, Fellow, IEEE, and Zhigang Cao, Senior Member
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO.6, NOVEMBER 2004,-0001,():
暂无
关键词: Adaptive antenna arrays,, adaptive modulation,, dynamic spatial subchannel allocation,, joint transmit and receive beamforming,, multiple-input multiple-output (, MIMO), ,, orthogonal frequency-division multiplexing (, OFDM), .,
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35浏览
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【期刊论文】Arrav pattern SVntnesis and robust beamforming for a complex sonar system
吴仁彪, R.Wu, Y.Ma, R.D. James
IEEE Proc-Rodar, Sonar Naving, Vol. 144, No.6, December 1997,-0001,():
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【期刊论文】Time-delay- and time-reversal-based robust Capon beamformers for ultrasound imaging
吴仁彪, Zhisong Wang, Jian Li, and Renbiao Wu.
IEEE Transactions on Medical Imaging, 2005, Vol.24, No.10, pp. 1308-1322.,-0001,():
Currently, the nonadaptive delay-and-sum (DAS) beamformer is extensively used for ultrasound imaging, despite the fact that it has lower resolution and worse interference suppression capability than the adaptive standard Capon beamformer (SCB) if the steering vector corresponding to the signal of interest (SOI) is accurately known. The main problem which restricts the use of SCB, however, is that SCB lacks robustness against steering vector errors that are inevitable in practice. Whenever this happens, the performance of SCB may become worse than that of DAS. Therefore, a robust adaptive beamformer is desirable to maintain the robustness of DAS and adaptivity of SCB. In this paper we consider a recent promising robust Capon beamformer (RCB) for ultrasound imaging. We propose two ways of implementing RCB, one based on time delay and the other based on time reversal. RCB extends SCB by allowing the array steering vector to be within an uncertainty set. Hence, it restores the appeal of SCB including its high resolution and superb interference suppression capabilities, and also retains the attractiveness of DAS including its robustness against steering vector errors. The time-delay-based RCB can tolerate the misalignment of data samples and the time-reversal-based RCB can withstand the uncertainty of the Green’s function. Both time-delay-based RCB and time-reversal-based RCB can be efficiently computed at a comparable cost to SCB. The excellent performances of the proposed robust adaptive beamforming approaches are demonstrated via a number of simulated and experimental examples.
关键词: Adaptive arrays,, array errors,, interference suppression,, robust adaptive beamforming,, robust Capon beamforming,, time delay,, time reversal,, ultrasound imaging.,
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廖桂生, 保铮
电子学报,1997,25(3):102~104,-0001,():
本文提出了一种新的基于高阶统计量的自适应非线性波束形成器(HOS-ANBF),与常规的基于2阶相关矩阵自适应数字波束形成器(ADBF)相比,它的有效阵列孔径得到扩展,可抑制多于阵元数个有源干扰,对主瓣干扰抑制的性能及波束保形得到明显提高,对阵元误差具有更强的容差能力。计算机仿真结果验证了这些结论。
关键词: 自适应阵列信号处理, 非线性波束形成, 高阶统计量
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【期刊论文】基于多普勒信息的盲波束形成方法在声呐信号处理中的应用研究
赵俊渭, 李洪升, 陈华伟, 王峰, 郭业才
,-0001,():
本文针对水声环境和水声信号的特点,提出了一种可用于任意阵形的自适应神经网络盲波束形成方法。该方法在未知基阵响应向量的情况下,利用水声信号多普勒频率信息,估计波束形成的权矢量,采用神经网络的方法实现盲波束形成,从而避免了矩阵的求逆运算,不但减小了运算量而且易于用硬件实现。此外该算法对系统误差具有很强的鲁棒性。通过拖曳阵和体积阵的仿真实验,验证了所提出方法的有效性和正确性。
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40浏览
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李春国, Chunguo Li, Xiang Wang, Luxi Yang, Wei-Ping Zhu
IET COMMUNICATIONS,-0001,():
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20浏览
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