By a News Reporter-Staff News Editor at Telecommunications Weekly -- New research on Parallel and Distributed Computing is the subject of a report. According to news originating from Beijing, People's Republic of China, by VerticalNews correspondents, research stated, "Localization is of great importance in mobile and wireless network applications. Time Difference of Arrival (TDOA) is one of the widely used localization schemes, in which the target (source) emits a signal and a number of anchors (receivers) record the arriving time of the source signal."
Our news journalists obtained a quote from the research from Tsinghua University, "By calculating the time difference of different receivers, the location of the target is estimated. In such a scheme, receivers must be precisely time synchronized. But time synchronization adds computational cost, and brings errors which may lower localization accuracy. Previous studies have shown that existing time synchronization approaches using low-cost devices are insufficiently accurate, or even infeasible under high requirement for accuracy. In our scheme (called Whistle), several asynchronous receivers record a target signal and a successive signal that is generated artificially. By two-signal sensing and sample counting techniques, time synchronization requirement can be removed, while high time resolution can be achieved. This design fundamentally changes TDOA in the sense of releasing the synchronization requirement and avoiding many sources of errors caused by time synchronization. We implement Whistle on commercial off-the-shelf (COTS) cell phones with acoustic signal and perform simulations with UWB signal. Especially we use Whistle to localize nodes of large-scale wireless networks, and also achieve desirable results."
According to the news editors, the research concluded: "The extensive real-world experiments and simulations show that Whistle can be widely used with good accuracy."
For more information on this research see: High-Accuracy TDOA-Based Localization without Time Synchronization. IEEE Transactions on Parallel and Distributed Systems, 2013;24(8):1567-1576. IEEE Transactions on Parallel and Distributed Systems can be contacted at: Ieee Computer Soc, 10662 Los Vaqueros Circle, PO Box 3014, Los Alamitos, CA 90720-1314, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Parallel and Distributed Systems - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=71)
The news correspondents report that additional information may be obtained from B. Xu, Tsinghua Univ, Sch Software, Beijing 100084, People's Republic of China. Additional authors for this research include G.D. Sun, R. Yu and Z. Yang.
Keywords for this news article include: Asia, Beijing, Wireless Network, Wireless Technology, People's Republic of China, Parallel and Distributed Computing
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC