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For the low accuracy of the spectrum sensing of the single node, this paper discusses several popular cooperative spectrum sensing technology. It also proposes a clustering double threshold cooperative spectrum sensing algorithm does two threshold detection based on the double threshold cooperative spectrum sensing algorithm. This algorithm applies or data fusion rule to realize the combination of...
For the least connections algorithm currently used cannot solve the problem of inaccurately reflecting the load capacity of servers caused by the situation that the difference of resources consumed by different requests is very big, this paper designs a new algorithm named UCM algorithm. It means use the unused rate of the CPU and Memory as the actor to calculate the weight of the server, and introduces...
Along with correspond by letter the development of the profession, the wireless signal blast-off the station is gradually small scaled to turn and easily operate. It results in the illegal member made use of it to carry out to break the law the crime activity, influencing the people to usually produce the living work. The want for is related to examine and position the equipment in fight break the...
Human detection is a key problem in computer vision, with several applications that have the potential to positively impact quality of life. In recent years, the number of approaches to detect human in video sequences has grown steadily. This paper proposed a novel approach to improve the capability of human detection. After investigating the image texture analysis methods, we adopt the new good texture...
This paper focuses on ARP attacks in switched networks, from ARP protocol perspective, analyses the principle of ARP attacks and the exceptional interrupt occurs they cause when the terminal users access the servers. To quickly and effectively detect ARP spoofing, this paper proposes a WinP cap based detection system of ARP spoofing. Using Win Pcap driver development monitoring software, implements...
The requirements of common network communication for the reliability of network transmission are low. It can not meet the requirements of real time and high reliability in the industrial control network traffic. For needs of high reliability in industrial control network communications, this paper analyzes the VxWorks operating system and the structure of the network layer network card drivers. By...
The amount of data during OPC Client and OPC Server communications is an important parameter to design an equipment, a network and a system, but it has never been given in the theoretical calculations or tests. In this paper amount of data is tested, and the result of the test is analyzed by designing and making six groups of experiments, then recording, analyzing and operating the data. In the end,...
In the application of some embedded systems such as the ship-borne routers, ATM machines and so on, many low-power embedded CPU needs connection with PCI-104 bus. However, these low-power embedded CPUs don't have the bus interface of PCI-104 (PCI). In order to solve this problem, this paper designs FPGA-based PCI-104 bus interfaces of the low-power embedded CPU. Through the analysis of PCI-104 bus...
Cooperative diversity has attracted great attention in recent years. In such a system, even single-antenna terminals can achieve spatial diversity with the help of other terminals. In this paper, we focus on the outage performance of cooperative diversity. The outage probabilities of several mean cooperative protocols are analyzed and compared. Theory analysis and simulation results show that the...
The anti-noise performance of direct sequence spread spectrum (DSSS) communication system is analyzed in this paper. The new result given in the paper shows that anti-noise performance of DSSS system is different from classic result. The attenuation to input narrowband noise in DSSS system is the function of the relative position between the narrowband noise and carrier frequency of DSSS system, and...
A constrained resource allocation scheme is proposed in this paper to achieve optimized dynamic data scheduling in next generation wireless networks (NGWN). By modeling the problem as the solution to the maximization of the total utility function, we derive the optimization resource allocation model by instantaneously estimating the integrated information on channel condition and queue length of each...
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