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In recent years, with the widespread popularity of e-commerce and online shopping platform, the express industry ushered in a period of rapid growth. The courier market, showing a wide range of competitive trends, gradually form a courier and mutual penetration of electricity supplier industry pattern. Since its inception, SF is playing out all the logistics service providers, and with firm size,...
This paper considers the time and frequency synchronization based on the interspersed pilots. The shortcoming of an existing algorithm is observed, and a new channel estimation assisted time and frequency algorithm is proposed. Since the channel estimation is always needed by the data transmission, our newly proposed algorithm can improve the synchronization performance without too much increase in...
In narrowband power line networks, it is necessary for intermediate nodes to forward packets when source node transmits data to a distant destination node due to the great signal attenuation. Statically configured routing can not meet this demand without any consideration of dynamic network topology. This article makes efforts to find an effective and reliable routing solution to work in the power...
Wireless channels are inherently time-varying due to many different factors, such as fading, shadowing, multipath effects, etc. In practice, it is too complicated to completely capture these factors in a single theoretical framework. Therefore, many simplified channel models have been proposed and widely used in theoretical analysis, protocol design and performance evaluation. However, recent studies...
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