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| 1 | COMPUTATIONALLY EFFICIENT ESPRIT METHOD FOR DIRECTION FINDING显示文摘In this paper,a low complexity ESPRIT algorithm based on power method and Orthogo- nal-triangular (QR) decomposition is presented for direction finding,which does not require a priori knowledge of source number and the predetermined threshold (separates the signal and noise ei- gen-values).Firstly,according to the estimation of noise subspace obtained by the power method,a novel source number detection method without eigen-decomposition is proposed based on QR de- composition.Furthermore,the eigenvectors of signal subspace can be determined according to Q matrix and then the directions of signals could be computed by the ESPRIT algorithm.To determine the source number and subspace,the computation complexity of the proposed algorithm is approximated as (2log_2 n+2.67)M^3,where n is the power of covariance matrix and M is the number of array ele- ments.Compared with the Single Vector Decomposition (SVD) based algorithm,it has a substantial computational saving with the approximation performance.The simulation results demonstrate its effectiveness and robustness. | Bao Zhiqiang Wu Shunjun Zhang Linrang | 2007 | Journal of Electronics(China)2007，24，5： | 4 |
| 2 | Multidimensional Waveform Design for MIMO SAR Interferometry显示文摘One key of Multiple-input multiple-output(MIMO) Synthetic aperture radar(SAR) interferometry is the effective separation of the echoes originating from different transmissions. A multidimensional waveform design method for MIMO SAR interferometry is presented. By exploiting the wavenumber shift and Doppler-band shift phenomenon in the design of transmitted signals, the echo separation can be efficiently accomplished via the filtering operations in range-frequency domain and azimuth-spatial domain. Such waveform design can meet the requirement of MIMO SAR imaging on integrated cross interference level without reduce the swath width. Such waveform design also improves the coherence between the independent observations and enlarges the unambiguity range of height estimation. The results of the numerical simulations demonstrate the feasibility of the proposed waveform design method. | LIU Nan ZHANG Linrang | 2018 | Chinese Journal of Electronics2018，27，1： | 2 |
| 3 | Directionfinding of MIMO radar through ESPRIT and Kalman filter显示文摘 | Liu Nan Zhang Linrang Zhang Juan Shen Dong | 2009 | IET Electronics Letters2009，45，17： | 1 |
| 4 | A radar ECCM scheme based on full-rate orthogonal pulse block显示文摘 | Liu Nan Zhao Shanshan Zhang Linrang | 2013 | J Comput Inf Syst2013，9，24： | 1 |
| 5 | Focusinghighly squinted data using the extended nonlinear chirp scaling algorithm 显示文摘 | Liu Gaogao Zhang Linrang Liu Nan | 2013 | IEEE Geoscience and Remote Sensing Letters2013，10，2： | 1 |
| 6 | Multidimensional independent subspace analysis by natu- ral gradient显示文摘 | WANG FASONG ZHANG LINRANG LI RUI | 2012 | Przeglad Elektrotchniczny2012，88，9： | 1 |
| 7 | Harmonic retrieval by period blind source extraction method: model and algorithm显示文摘 | WANG Fasong ZHANG Linrang | 2012 | Digital Signal Processing2012，，22： | 1 |
| 8 | Effective beamforming for coherent signal reception 显示文摘 | ZHANG Linrang SO H C LI Ping LIAO Guisheng | 2004 | Electronics Letters2004，39，13： | 1 |
| 9 | STUDY OF MISMATCHED FILTERING OF PASSIVE RADAR USING TV SIGNAL显示文摘This letter demonstrates the structure of the passive radar using TV signals. Because the TV signal is a kind of pseudoperiodic signal, the matched filtering of color TV signals would yield high sidelobes which cause the range ambiguity. To overcome this problem, the mismatched filter is proposed to suppress the correlation sidelobes of matched filtering of TV signals. By utilizing the iteration process, this method could achieve the required peak sidelobe level. The impacts of the noise and target movement on mismatched filtering are also analysed. Simulation results are included to demonstrate the effectiveness of the proposed technique. | Sun Xiaowen Zhang Linrang Wu Shunjun | 2006 | Journal of Electronics(China)2006，23，1： | 1 |
| 10 | CHANNEL ESTIMATION OF MULTI-RATE DS-CDMA SIGNALS IN SLOW FADING MULTIPATH CHANNELS显示文摘In Direct-Sequence Code Division Multiple Access(DS-CDMA) mobile communi-cation systems, it is very important to obtain accurate estimation of the channel parameters,especially that of the propagation delay. But the near-far problem may make the estimationcomplicated and can degrade the estimation performance significantly. In this paper, an efficientMaximum Likelihood (ML) method is presented for channel parameter estimation of multi-rateDS-CDMA systems in slow fading multipath channels in a near-far scenario. The algorithmextended the ML approach to multi-rate DS-CDMA systems, and proposes decomposing a multi-dimensional optimization problem into a series of one-dimensional optimization and has improvedcomputational efficiency. Theoretical analysis and numerical examples show that the estimatorproposed is effective and near-far resistant. | Zhang Yingguang Zhang Linrang Liao Guisheng (National Key Laboratory for Radar Signal Processing, Xidian University, Xi’an 710071) | 2003 | Journal of Electronics(China)2003，20，5： | 0 |
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