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To increase the capacity of mobile communications, it is important to accurately estimate the power and the direction of arrival (DOA) of source. An efficient algorithm is proposed for this purpose. A cost function is optimized by using the particle swarm optimization (PSO). To accelerate the convergence of the fitness function of PSO, the inertia weights of particles are different from each other...
The Direct Sequence Spread Spectral (DSSS) communication system has been widely used in military and civilian fields because of its high processing gain, strong ant-jamming and anti-probed capacity, and low intercepted probability. In this paper, an efficient blind parameter estimating and detecting algorithm is proposed, which takes advantage of the autocorrelation property of pseudo random code...
Process of configuration and fault scan is required to be repeated many times before all resources of a FPGA-under-test are tested and diagnosed. Both FPGA test system and test schemes have been studied and presented in the keynote. Construction of the in-house developed FPGA test system is based on SOC HW/SW co-verification technology. Algorithms for FPGA test and diagnosis covering all FPGA resources...
Power consumption is a serious consideration in Network-on-Chip (NoC) mapping research area. Most NoC mapping approaches use heuristic algorithms to solve this NP-Complete problem. In this paper, a new swarm intelligence optimization named artificial bee colony algorithm (ABC) with chaos mechanism is proposed. Use the disorder and ergodicity features of chaos mechanism, we can solve the problem that...
The ultimate goal for a Trailing Suction Hopper Dredger (TSHD) is maximizing the profit. The performance of the dredger is strongly influenced by the operator's strategy and the soil properties. A decision support system can help the operator maximizing the performance by using models. In this paper, the optimization method which combined the Neural Network (NN) model with the genetic algorithm (GA)...
A service oriented semantic search engine framework is proposed to extract automatically and accurately information on service provider on the Internet. Domain knowledge on theme and abstract service provider are modeled by ontology to guide information extraction. Theme identification for each web page is executed after the page is fetched by search engine. A page or a part of content of a page is...
Rigorous coupled-wave analysis, a classic approach for calculating grating structures, will be very slow in some cases, as involved lots of matrix's eigenvalue problems. The use of finite-difference frequency-domain can avoid eigenvalue problem by introduce a large number of difference calculations. Lots of matrix computations are involved in both methods. Matrix computation library accelerated by...
Based on the full three-dimensional Particle-in-Cell/Monte Carlo algorithm(PIC/MCC), two special form of multi-peak magnetic field configuration, external magnetic filter and tent-shaped filter, were analyzed respectively, their influences on electronic energy distribution were compared. The simulation results show that they all can confine diffusion of particles and can extract negative hydrogen...
In this short paper, a strict combined field integral equation formulation is proposed to solve electromagnetic scattering from perfect electric conductor surfaces with open boundary. The core idea of this method is to combine the magnetic field integral equation for an open surface with the traditional electric field integral equation. The method of moments equations obtained here will be solved...
In this paper, we propose an efficient timeslot allocation scheme to manage the network resource for a centralized indoor network under 60GHz millimeter-wave unlicensed spectrum. We develop a system model where both AP (access point) and devices are equipped with array antennas to improve the poor link budget in the 60GHz band. And the beamforming weighting vectors defined in the standard of IEEE...
In this paper, we make a performance comparison between convolutional(171,133) codes (CC), concatenated RS(255,239)-convolutional(171,133) codes (RS-CC) and LDPC(672,336) based on 60GHz single carrier physical layer (SC-PHY). With the effect of phase noise and non-linear distortion of power amplifier (NLPA) taken into account, RS-CC reveals higher robustness against the effect over LDPC, and it has...
A computational model of visual attention was developed for regions of small defects in a large background for inspection of surface quality in the line, simulating human visual attention mechanism. Firstly global features were extracted from an input image by Law's rules. Secondly Local features were extracted and evaluated through Itti's method and inspection requirements. Then the local features...
This paper gives a brief overview of voltage controlled oscillator(VCO) based on Si CMOS and SiGeBiCMOS process technologies. The status of designing techniques for high performance VCO is summarized because of its importance for high-speed communication systems and radar sensors. Then, the development tendency of VCO is introduced.
In view of the present virtual hysteroscopy laparoscopic system problems, combined with various processing algorithms, discussed deeply the key techniques about collision detection, deformation computation, and path planning of virtual hysteroscopy laparoscopy surgery simulator system. Subsequently, these three key techniques involved in the virtual hysteroscopy laparoscopy surgery simulator system...
Network-on-chip (NoC) is a new solution for multi-core interconnection. The static virtual channel allocation and XY routing are regularly used by the 2D mesh NoC. But the inter-core transmission congestion increases the transmission delay and decrease the throughput, which depredates the cooperation of multiple cores. This paper proposes a QoS mechanism and designs the router architecture by dynamic...
With the development of intelligent transportation systems, more and more attention was paid to the study of VANETs. A reasonable node mobility model is very important to evaluating the authenticity of various VANETs protocols. In this paper, a mobility model based on real map was proposed for VANETs to overcome the disadvantages of existing models. The new model can show vehicles' movement scenario...
In this paper, we consider the classical linear regression model for the estimation of the parameter vector, where the noise of the observation is norm-bounded. The feasible parameter set (FPS) is constructed through all admissible solution to the linear system. Because the Chebyshev center of FPS is in fact the vector that minimizes the worst-case estimation error, we look forward to finding it as...
In this paper, based on passive millimeter-wave (PMMW) imaging system, we apply a novel image representation theory — the sparse representation to PMMW image denoising procedure. It is proved that PMMW image can have spare representation based on overcomplete dictionary, and the sparsity of image plays a remarkable role in our denoising method. By choosing a reasonable threshold, we use K-SVD algorithm...
Aimed at the problem of the near-field imaging in real time, a near-field narrow 2-D imaging algorithm based on the combination of single-input multiple output array (SIMO) and synthetic aperture radar (SAR) is proposed. By combining a real aperture and synthetic aperture, a 2-D synthetic aperture plane which is in terms of spatial sampling to obtain the target scattering information is synthesized...
In this paper, we introduce the recently published China Ultra Wideband (UWB) standard defined in China Wireless Personal Area Networks (C-WPAN) working group for its Dual Carrier OFDM (DC-OFDM) system. The pros and cons are discussed for this DC-OFDM system with four band hopping. The requirement for the length of channel estimation symbols in C-WPAN UWB is validated by applying an enhanced Least...
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