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Localization is one of the most important technologies in Underwater Wireless Sensor Networks (UWSNs), since it plays a critical role in many applications. As the variable speed of sound and the long propagation delays under water, using the traditional localization algorithms become difficult and impractical in UWSNs. In this paper, a new localization algorithm for UWSNs is presented. By deploying...
The Doppler shift, or equivalently the vehicular speed, represents the fading rate of mobile channels, thus its estimation must be important in the mobile communication system. This paper investigates the estimation of Doppler shift by taking into consideration the rate of minimum (ROM) of envelope, where both the iterative processing and polynomial fitting are employed to improve the estimating performance...
It is well recognized that channel state information (CSI) feedback plays a key role in the performance of closed-loop wireless networks. However, most work on energy efficiency (EE) typically studies this problem from the downlink data transmission point of view. In this paper, we propose an alternative approach to investigate the EE for wireless communication networks through controlling the channel...
This paper focuses on usage intention of the e-commerce based on ATM model. After empirical analysis, the following conclusions were made: Customer usage attitude has a significant positive impact on customer usage intension; customer perceived usefulness, perceived ease of use and perceived risk would significantly affect usage attitude. At the end, this paper proposes related suggestion about e-commerce.
In viewing of the disadvantages with the current broadcasting algorithm with wireless mobile network, this paper proposes an improved broadcasting algorithm based on a priority classification. The simulation demonstrates that this scheme can significantly reduce the amount of transmitting broadcasting packet, and show obviously advantages over others algorithm, and improves the performances of broadcasting.
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