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	2008 35 (6)
	Nov. 18, 2008

	957	CHEN Liang, LI Jian-dong and DONG Wei
		Robust MIMO zero-forcing receiver in the presence of the channel estimation error
		A robust zero-forcing receiver in the Multiple Input Multiple Output (MIMO) channel with a channel estimation error is presented. By considering the statistics of channel estimation errors, the coefficient of zero-forcing filter is modified with the estim...
		JXU 35 (6): 957-962 [Abstract ] ( 19 ) [HTML 0KB] [PDF 818KB ]( 28 )

	963	GUO Yi, LIU Gang and GE Jian-hua
		Novel timing synchronization algorithm for the uplink of an OFDMA system
		The effect of timing offset on OFDMA signals is exploited and a least squares algorithm of timing offset is proposed for OFDMA uplink systems. The phase difference between the sub-carriers of pilot symbols is used to estimate the timing offset. Compared w...
		JXU 35 (6): 963-967 [Abstract ] ( 18 ) [HTML 0KB] [PDF 659KB ]( 16 )

	968	PAN Qiao, and PEI Chang-xing
		IP flow-based variable sampling method for network traffic measurement
		The random packet sampling method is usually employed by traffic sampling measurement. But the accuracy of anomaly detection is affected by the fact that it biases a large IP flow. Based on the IP flow arrival process, a variable sampling method is propos...
		JXU 35 (6): 968-972 [Abstract ] ( 16 ) [HTML 0KB] [PDF 612KB ]( 19 )

	973	ZHAO Li, SUN Xian-pu and ZHANG Hai-lin
		Analysis of a constrained LMS algorithm for MMSE combination
		A Constrained least-mean-square (LMS) algorithm is proposed, which is used for an adaptive optimum combination(MMSE criterion) of diversity signals in orthogonal frequency-division multiplexing (OFDM) systems. Compared with the conventional algorithm, the...
		JXU 35 (6): 973-977 [Abstract ] ( 17 ) [HTML 0KB] [PDF 531KB ]( 15 )

	978	LIU Gang, GUO Yi and GE Jian-hua
		Optimal training design for MIMO-OFDM systems
		The problem of optimal training design for channel estimation in MIMO-OFDM systems is investigated. The optimality condition and training structure based on minimizing the channel estimation MSE is analyzed, and a new training sequence is presented. This ...
		JXU 35 (6): 978-982 [Abstract ] ( 16 ) [HTML 0KB] [PDF 595KB ]( 19 )

	983	CHEN Ru-wei, , HUANG Hua-wei, DU Xiao-ni, DING Yong and XIAO Guo-zhen
		On the number of shortest cycles of Tanner graphs
		By the method for investigating the relation between parity-check matrixes and cycles of associated Tanner graphs proposed by Chen et al., the one-to-one correspondence between k-row-combinations satisfying a certain condition in a parity-check matrix of...
		JXU 35 (6): 983-985 [Abstract ] ( 16 ) [HTML 0KB] [PDF 449KB ]( 14 )

	986	LIU Jing-mang, , YANG Wan-hai, YANG Bai-sheng and ZUO Tao
		Novel parameter estimation principium about trajectory invariable-information of target elevation information
		According to the author’s Cotangent relations theorem, bearings-only target tracking with linear motion is achieved. For the single/multiple senor measurements including elevations based target tracking problem, theorems for both target trajectory parame...
		JXU 35 (6): 986-991 [Abstract ] ( 17 ) [HTML 0KB] [PDF 676KB ]( 11 )

	992	MENG Xiang-dong, WU Jian-xin, WANG Tong and BAO Zheng
		Clutter analysis and range-ambiguous clutter suppression for bistatic airborne radar
		The geometry of every bistatic airborne radar configuration is analysed. A clutter mode with the variable azimuth angle and bistatic range is presented. A formula for calculating the Doppler frequency of receiving clutter in any bistatic configuration is ...
		JXU 35 (6): 992-998 [Abstract ] ( 17 ) [HTML 0KB] [PDF 1749KB ]( 14 )

	999	ZHANG Wei-tao, LOU Shun-tian, ZHANG Yan-liang and
		Adaptive Least-Squares method for blind source separation with an equivariant property
		Equivariant adaptive blind source separation algorithms require a serial update rule for the demixing matrix. From the point of view of relative gradient proposed by Cardoso, we optimize a nonlinear principal component analysis criterion. Then a modified ...
		JXU 35 (6): 999-1002 [Abstract ] ( 18 ) [HTML 0KB] [PDF 533KB ]( 12 )

	1003	WANG Yong, LIAO Gui-sheng, YE Zi and WANG Xi-yuan
		Study of OSTBC and eigen-beamforming with antenna array groups
		This paper investigates a novel scheme combining spatial multiplexing with beamforming in spite of the contradictive requirement of antenna element spacing. The proposed scheme combines spatial multiplexing with beamforming of space-time block coding, whi...
		JXU 35 (6): 1003-1008 [Abstract ] ( 18 ) [HTML 0KB] [PDF 685KB ]( 16 )

	1009	AN Zhi-juan, , SU Hong-tao and BAO Zheng
		Estimation of the number of sources based on spatial smoothing
		In the context of a small number of snapshots or unequal noise levels the noise eigenvalues of the covariance matrix are spreading, which results in the performance deterioration of the Akaike information criterion(AIC) and the Minimum Description Length(...
		JXU 35 (6): 1009-1014 [Abstract ] ( 17 ) [HTML 0KB] [PDF 593KB ]( 15 )

	1015	CHEN Liang, LIANG Chang-hong, WU Bian and ZHU Cheng
		Difference-frequency coupling in nonlinear left-handed metamaterials
		Based on the nonlinear electromagnetic theory, general coupled-mode equations for difference-frequency coupling in nonlinear left-handed metamaterials(LHM) are studied. The co-directed energy conversion process and spatial distribution of the signal wave ...
		JXU 35 (6): 1015-1019 [Abstract ] ( 20 ) [HTML 0KB] [PDF 973KB ]( 11 )

	1020	CHEN Xiao-qun, GUO Yu-chun and SHI Xiao-wei
		Design of a highly efficient Doherty power amplifier for the OFDM system
		An inverted Doherty power amplifier is proposed for the OFDM with the characteristic of high power to average power ratio (PAPR). The inverted structure changes its combining node from the end of the peak amplifier to the carrier amplifier, which improves...
		JXU 35 (6): 1020-1025 [Abstract ] ( 19 ) [HTML 0KB] [PDF 851KB ]( 16 )

	1026	LIU Chao, , LIANG Yu-jun, LIU Qi-zhong and FU Yun
		Analysis and calculation of ground loss resistance for a VLF T-type antenna array with the ground screen
		The methods for calculating the ground loss resistance of a very low frequency (VLF) T-type antenna array with the ground screen are studied. The magnetic field loss produced by the currents on antenna top wires of an arbitrary length is introduced to the...
		JXU 35 (6): 1026-1030 [Abstract ] ( 17 ) [HTML 0KB] [PDF 684KB ]( 15 )

	1031	WANG Yu-jun, , ZHAO Guo-qing and WANG Hong-wei
		Echo cancelling algorithm for the LFM radar
		A new algorithm is proposed for radar echo cancelling based on the group delay of the LFM (Linear Frequency Modulated) signal. Firstly, the received signal is multiplied by the conjugation of its delayed version to get the frequency difference between the...
		JXU 35 (6): 1031-1035 [Abstract ] ( 15 ) [HTML 0KB] [PDF 752KB ]( 16 )

	1036	ZHANG Huan-qian, , YANG Yin-tang and ZHU Zhang-ming
		Novel 0.5V bulk driven full differential Amp
		In oder to meet the needs of the low voltage-low power circuit application, a full differential amplifier operating at the 0.5V power supply with bulk inputs is introduced. A prototype was designed in a standard 0.18μm CMOS process using 0.5V threshold v...
		JXU 35 (6): 1036-1040 [Abstract ] ( 18 ) [HTML 0KB] [PDF 688KB ]( 11 )

	1041	ZHANG Peng, ZHUANG Yi-qi, BAO Li, MA Zhong-fa, BAO Jun-lin and LI Wei-hua
		Measurement and analysis of RTS noise in nano-MOS devices
		A virtual-instrument based measurement and analysis method for RTS noise in nano-MOS devices is presented. After a systematic computation of both difference analysis and Gaussian function fitting, and digital filtering and exponential function fitting, th...
		JXU 35 (6): 1041-1045 [Abstract ] ( 16 ) [HTML 0KB] [PDF 731KB ]( 13 )

	1046	ZHU Yan-wu, SHI Shun-xiang, SUN Yan-ling, FENG Xiang-chu and LIU Ji-fang
		Study of photoconductive switches transmission line based on D’Alembert’s method
		D’Alembert’s method is used to analyze the Photoconductive Switches transmission line. A total reflection border and the implementation of a new field source excitation for the finite-difference time-domain method are built to satisfy D’Alembert’s met...
		JXU 35 (6): 1046-1050 [Abstract ] ( 18 ) [HTML 0KB] [PDF 652KB ]( 13 )

	1051	LIU Hong-xia and CAI Nai-qiong
		Improved two-frequency method with the four-element circuit model for the novel HfO₂ as the gate dielectric
		For the MOS capacitance with the ultra thin hafnium oxide, an equivalent four-element circuit model including the additional series resistance and series inductance is proposed to be employed in the two-frequency C-V correction. These extracted paramet...
		JXU 35 (6): 1051-1055 [Abstract ] ( 16 ) [HTML 0KB] [PDF 775KB ]( 13 )

	1056	CHEN Sheng, BAO Liang, CHEN Ping, HU Sheng-ming and WANG Meng
		Study of algorithm on data race and deadlock detection for BPEL process
		The business process always suffers from notorious problems, such as data race and deadlock. Moreover, these problems are extremely difficult to track down by testing and debugging. This paper proposes a novel detection approach for the BPEL process, whic...
		JXU 35 (6): 1056-1062+1068 [Abstract ] ( 21 ) [HTML 0KB] [PDF 795KB ]( 17 )

	1063	MAO Li-qiang, MA Jian-feng and
		Analysis of provably secure on-demand distance vector routing in MANET
		Based on the simulation paradigm, Acs et al proposed a formal model tailored to the security analysis of on-demand distance vector routing protocols in MANET, and a routing protocol, called ARAN, was proven secure in the model. We indicate the improper ma...
		JXU 35 (6): 1063-1068 [Abstract ] ( 15 ) [HTML 0KB] [PDF 703KB ]( 16 )

	1069	WANG Xiao-bing and DUAN Zhen-hua
		Pointers in framing projection temporal logic programming languages
		A new method is presented for formalizing pointers and its implementation in Framed Tempura which is a framing Projection Temporal Logic programming language. It extends the Projection Temporal Logic and gives formal definitions of pointers reference and ...
		JXU 35 (6): 1069-1074 [Abstract ] ( 15 ) [HTML 0KB] [PDF 549KB ]( 15 )

	1075	CHEN Li-xia, , DING Xuan-hao, SONG Guo-xiang and SUN Xiao-li
		Image de-noising algorithm based on total variation and wavelet transform
		Based on the standard ROF model, an improved method for image de-noising is proposed. In order to overcome the weakness that edge information is sensitive to noise and prone to blur of the ROF model while de-noising, in the new algorithm, the anisotropic ...
		JXU 35 (6): 1075-1079 [Abstract ] ( 20 ) [HTML 0KB] [PDF 1162KB ]( 20 )

	1080	LIANG Jin-jin, LIU San-yang and WU De
		Space support vector domain classifier
		A space support vector domain classifier (SSVDC) is proposed. In the training process, the support vector domain description (SVDD) is applied to both the positive and negative classes, disconnect regions are obtained according to the description boundari...
		JXU 35 (6): 1080-1083+1088 [Abstract ] ( 18 ) [HTML 0KB] [PDF 540KB ]( 12 )

	1084	GAO Jun, CAO Xiang-yu, ZHANG Guang and WEN Xi
		Analysis and design of a phased array antenna with a shaped pattern
		A phased array antenna, which scans in the elevation plane with the shaped pattern in the azimuth plane, is analyzed and designed. The printed dipole is used as radiating elements. The fed current distribution in the scan plane adopts the Taylor amplitude...
		JXU 35 (6): 1084-1088 [Abstract ] ( 16 ) [HTML 0KB] [PDF 806KB ]( 15 )

	1089	NIU Lan-qi, , ZHANG Tai-yi and ZHANG Jing
		On the computation of the distance spectrum for punctured convolutional codes
		For the optimum design problem of punctured convolutional codes based on the distance spectrum, an efficient computing method of the distance spectrum for punctured convolutional codes is proposed. A state transition matrix sequence is constructed with th...
		JXU 35 (6): 1089-1093 [Abstract ] ( 16 ) [HTML 0KB] [PDF 590KB ]( 13 )

	1094	MING Yang, ZHAN Yang, WANG Yu-min and PANG Liao-jun
		Improved certificateless signature scheme
		Based on the bilinear pairing, an improved certificateless signature scheme is presented to overcome the Yap-Heng-Goi scheme’s drawback that it is vulnerable to public key replacement attacks. This proposed scheme uses a short signature to generate the u...
		JXU 35 (6): 1094-1099 [Abstract ] ( 15 ) [HTML 0KB] [PDF 529KB ]( 16 )

	1100	LI Sheng-qiang, , HUANG Hua-wei, ZHANG Ning and XIAO Guo-zhen
		New design of ternary low correlation zone sequence sets
		A column sequence set of period 3m+1-1 is devised by the idea of confusion and balance from the ternary sequences of period 3m-1 with the ideal autocorrelation property proposed by Helleseth et al., and new ternary low correlation zone sequence sets of pe...
		JXU 35 (6): 1100-1104+1126 [Abstract ] ( 17 ) [HTML 0KB] [PDF 471KB ]( 14 )

	1105	LI Hai-tao and LIN Xiao-kang
		Water-filling precoder for single-carrier communication systems
		A water-filling precoder is proposed for shaping the spectrum of transmitted signals in single-carrier systems over inter-symbol interference (ISI) channels. This precoder can be efficiently implemented in the frequency domain without incurring extra rece...
		JXU 35 (6): 1105-1109 [Abstract ] ( 14 ) [HTML 0KB] [PDF 676KB ]( 17 )

	1110	CHENG Xiao-lei, , FAN Ru-yu and