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| 1 | Generalized adaptive subspace detector for range-Doppler spread target with high resolution radar显示文摘A generalized adaptive subspace detector for range-Doppler spread target(RDST-GASD)in the non-Gaussian clutter is derived in this paper.The subspace model of multi-pulse wideband radar target returns is established in the frequency-slow time domain.The clutters are modeled as nonhomogeneous spherically invariant random vectors(SIRVs);that is,the power of the clutter is different from one range cell to another.The clutter covariance matrix is estimated with the secondary data.The constant false alarm rate(CFAR)property of RDST-GASD with respect to both the power and the covariance matrix of the clutter is demonstrated theoretically.Considering that there is target range walking across range cells during a coherent processing interval(CPI)for wideband radar,the RDST-GASD does range alignment to the multiple returns of the target in a CPI.As a result,the coherent integration is implemented and the detection performance is improved. | DAI FengZhou LIU HongWei WU ShunJun | 2011 | Science China(Information Sciences)2011，54，1： | 6 |
| 2 | 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 |
| 3 | Subband Implementation for Wideband Radar Clutter Suppression and Target HRRP Enhancement显示文摘 | DAI Fengzhou LIU Hongwei WU Shunjun | 2010 | Chinese Journal of Electronics2010，19，2： | 2 |
| 4 | Source enumeration for high-resolution array processing using improved Ger- schgorin radii without eigen-decomposition 显示文摘 | Huang Lei Long Teng Wu Shunjun | 2008 | IEEE Trans on Signal Processing2008，56，12： | 1 |
| 5 | A Method for Improving Doppler Performance of the Side-lobe Redection Filter for Binary Code显示文摘 | Yu Genmiao Luo Yongjian Wu Shunjun | 2001 | Journal of Xidian University2001，，： | 1 |
| 6 | Application of Compressed Sensing in Sparse Aperture Inaging of Radar显示文摘 | Li Jun Xing Mengdao Wu Shunjun | 2009 | APSAR Xian China Oct2009，2009，： | 1 |
| 7 | Generalized adaptive subspace detector for range-Doppler spread target with high resolution radar显示文摘 | DAI Fengzhou LIU Hongwei WU Shunjun | 2010 | Science China:Information Sciences2010，40，10： | 1 |
| 8 | Anti-interference LMS algorithm显示文摘 | Shang Yong Wu Shunjun Xiang Haige | 2002 | China Science2002，32，4： | 1 |
| 9 | Source enumer-ation for high-resolution array processing using im-proved Ger-schgorin radii without Eigen decomposi-tion 显示文摘 | Huang Lei Long Teng Wu Shunjun | 2008 | IEEE Transactions on Signal Processing2008，56，12： | 1 |
| 10 | A RBFNN Approach for DOA Estimation of Ultra Wideband Antenna Array显示文摘 | Wang Min Yang Shuyuan Wu Shunjun | 2008 | Neuro Computing2008，71，46： | 1 |
| 11 | Low Complexity method for signal subspace fitting 显示文摘 | HUANG Lei WU Shunjun FENG Dazhang | 2004 | IEE Electronics Letters2004，40，14： | 1 |
| 12 | Source enumeration for high-resolution array processing using improved Gerschgorin ra- dii without eigendecomposition 显示文摘 | Huang Lei Long Teng Wu Shunjun | 2008 | IEEE Trans on Signal Pro- cessing2008，56，12： | 1 |
| 13 | A RBFNN approach for DOA estimation of ultra wideband antenna array 显示文摘 | Wang Min Yang Shuyuan Wu Shunjun | 2008 | Neurocomputing2008，71，46： | 1 |
| 14 | 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 |
| 15 | THE DESIGN OF VMEBUS BRIDGE CONTROLLER WITH SHARC BUS显示文摘Targeting at the high expense and inflexibility to realize VMEbus bridge controller by professional Integrated Circuit (IC), this paper presents a scheme of adopting CPLD/FPGA (Complicated Programmable Logic Device/Field Programmable Gate Array) to design bridge controller between VMEbus and local bus. SHARC DSP (Digital Signal Processor) bus is an example. It has functions of nearly entire master/slave interface of VMEbus, and can act as DMA (Direct Memory Access) controller and perform block transfer in DMA or master processor initiative way without length limit. External circuit of the design is very simple. In comparison with special ICs, it has high performance to price ratio and can be easily applied to local buses of other processors with quite a little modification. | Wang Min Wu Shunjun Su Tao | 2005 | Journal of Electronics(China)2005，22，6： | 0 |
| 16 | FINITE WORDLENGTH ANALYZING FOR RLS SYSTOLIC ALGORITHM BASED ON THE SQUARE-ROOT-FREE SCALED GIVENS ROTATIONS显示文摘The least squares(LS) minimization problem constitutes the core of many real-time signal processing problems. A square-root-free scaled Givens rotations algorithm and its systolic architecture for the optimal RLS residual evaluation are presented in this paper. We analyze upper bounds of the dynamic range of processing cells and the internal parameters. Thus the wordlength can be obtained to prevent overflow and to ensure correct operations. Simulation results confirm the theoretical conclusions and the stability of the algorithm. | Xiong Jun Liao Guisheng Wu Shunjun(Key Laboratory of Radar Signal Processing, Xidian University, Xj’an 710071) | 1997 | Journal of Electronics(China)1997，14，4： | 0 |
| 17 | Parallel pipelined least-mean-square algorithm and its performance analysis | SHANG Yong WU Shunjun XIANG Haige | 2002 | Progress in Natural Science:Materials International2002，12，1： | 0 |
| 18 | A method of waveform design based on mutual information显示文摘A novel method called the general waterfilling,which is suitable when clutter is not negligible,is proposed to solve the waveform design problem of broadband radar for the recognition of multiple extended targets.The uncertainty of the target’s radar signatures is decreased via maximizing the mutual information between a random extended target and the received signal.Then,the general water-filling method is employed to the waveform design problem for multiple extended targets identification to increase the separability of multiple targets.Experimental results evaluated the efficiency of the proposed method.Compared to chirp signal and water-filling signal,our method improves the classification rates and even performs better at low signal-to-interference-plus-noise ratio(SINR). | Bo JIU Hongwei LIU Liya LI Shunjun WU | 2009 | Frontiers of Electrical and Electronic Engineering in China2009，4，2： | 0 |
| 19 | Catalyst-free alkylation of aminopyrazole by isatin in water显示文摘Reactions of isatins with 5-aminopyrazole afforded the 3-(5-aminopyrazol-4-yl)-3-hydroxy-2-oxindolines in good to excellent yields in refluxing water. No catalysts were required in the process. The new method exhibited the characteristics including green process, high yields, easy operation, and mild reaction conditions. | YANG JinMing WU Lin FANG Dong CAO Jian JI ShunJun | 2013 | Chinese Science Bulletin2013，58，24： | 0 |
| 20 | ASIC DESIGN OF ADAPTIVE THRESHOLD DENOISE DWT CHIP显示文摘According to the relationship of wavelet transform and perfect reconstructive FIR filter banks, this paper presents a real-time chip with adaptive Donoho's non-linear soft-threshold for denoising in different levels of multi-scale space through rearranging the input data during convolving, filtering and sub-sampling. And more important, it gives a simple iterative algorithm to calculate the variance of the noise in interregna with no signal. It works well whether the signal or noise is stationary or not. | Luo Feng Wu Shunjun Jiao Licheng ZhangLinrang(National Key Lab. for Radar Signal Processing, Xidian University, Xi’an 710071) | 2002 | Journal of Electronics(China)2002，19，1： | 0 |
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