Zhang Tingting

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In this paper, we present a ranging experiment performed in a typical indoor environment with a digital ultra wideband (UWB) system. At first, the structures of UWB transceivers are introduced, based on which the time of arrival (TOA) estimation algorithm based on energy detection is proposed consequently. Then the experiment background including the(More)
In order to design a low-computational time of arrival (TOA) estimation algorithm for the ultra wideband (UWB) based wireless sensor networks, a two-step TOA estimation method which focuses on the direct path (DP) component based on energy detection is proposed in this paper. The first step is to determine which energy block the DP locates by generalized(More)
With the development of the embedded technology, Wide applications of embedded technology will not be restricted by the speed of the processor and the design of the chip, but by the power consumption. How to accomplish more tasks with the same hardware resources attracts more and more attentions from the domestic and abroad scientists. Complex networks are(More)
Reclamation of municipal secondary effluent for non-potable purposes is considered vital in alleviating the demand for existing limited water supplies while helping to protect remaining water sources from being polluted. In recent decades, reverse osmosis and nanofiltration membrane technologies have become increasingly attractive for reclamation of(More)
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