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Sphere Decoding (SD) algorithm was proposed to effectively find the Maximum Likelihood (ML) solution. However, the computational complexity of SD is still too high when SNR is low or the dimension of the problem is large. In this paper, we propose three improved schemes based on contraction factor to reduce the complexity of sphere decoding. In the proposed schemes, a factor was introduced for speeding...
Maximum entropy method (MEM) is the traditional approach to estimate interbank exposure matrix, which is the key to assess contagion effect in banking system. Recently, a new transfer entropy method (TEM) is proposed to estimate interbank exposure matrix. This paper employs the two approaches to estimate interbank exposure matrix of Chinese banking system, and then simulate the contagion process given...
As a kind of wireless ad hoc network model, Sensor network has broad application prospects in environment, Military control, the Prediction of earthquake and climate and so on. Based on the functional of density control of Sensor Networks, a construction algorithm called Connected Cover Dominate Set has been proposed. In the new algorithm, the Sink node set up Cartesian code first, and then broadcast...
The severity loss distribution is the main topic in operational risk estimation. In this paper, we propose a novel model for quantifying operational risk in the framework of the loss distribution approach (LDA) as suggested by the Basel II. We use Cornish¡VFisher Expansion, which is non-parameter method, to fit operational risk loss severity, and then we use simulation technique to measure the operational...
Three degrees of freedom (TDOF) vibration system during sheet blanking based on servo press is established, and the amplitude vibration of the body, slider and base of the servo press is simulated by the software Matlab/Simulink. The influence of the blanking speed and the initiation fracture position of blank on the maximum amplitude of slider are analyzed in detail. The results show that with the...
With the continuous expansion of the network size, some networks gradually present the characteristics of social networks, especially, scale-free networks. At present, some theoretical studies of scale-free networks are mainly based on simulated platforms. Based on this, the question that how we fast simulate a network model possessing scale-free effects and presenting related characteristics of realistic...
The unavoidable disadvantage of OFDM-larger peak-to-average-power ratio (PAPR), which can lead to high requirement for high power amplifier at transmitter and receiver, low efficiency of transmission, and so on. Tone Reservation (TR) is a technique designed to combat this problem by reserving a number of carriers (tones) in the frequency domain to generate a cancellation signal in the time domain...
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