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New Findings on Wireless Communications and Networks Described by Investigators at University of Texas (Modeling and Estimation of Transient Carrier...

September 9, 2014



New Findings on Wireless Communications and Networks Described by Investigators at University of Texas (Modeling and Estimation of Transient Carrier Frequency Offset in Wireless Transceivers)

By a News Reporter-Staff News Editor at Journal of Mathematics -- Current study results on Wireless Communications and Networks have been published. According to news originating from Richardson, Texas, by VerticalNews correspondents, research stated, "Future wireless devices have to support many applications (e.g., remote robotics, wireless automation, and mobile gaming) with extremely low latency and reliability requirements over wireless connections. Optimizing wireless transceivers while switching between wireless connections with different circuit characteristics requires addressing many hardware impairments that have been overlooked previously."

Our news journalists obtained a quote from the research from the University of Texas, "For instance, switching between transmission and reception radio functions to facilitate time-division duplexing can change the load on the power supply. As the supply voltage changes in response to the sudden change in load, the carrier frequency drifts. Such a drift results in transient carrier frequency offset (CFO) that cannot be estimated by conventional CFO estimators and is typically addressed by inserting or extending guard intervals. In this paper, we explore the modeling and estimation of the transient CFO, which is modeled as the response of an underdamped second order system. To compensate for the transient CFO, we propose a low complexity parametric estimation algorithm, which uses the null space of the Hankel-like matrix constructed from phase difference of the two halves of the repetitive training sequence. Furthermore, to minimize the mean squared error of the estimated parameters in noise, a weighted subspace fitting algorithm is derived with a slight increase in complexity. The Cramer-Rao bound for any unbiased estimator of the transient CFO parameters is derived."

According to the news editors, the research concluded: "The performance of the proposed algorithms is also confirmed by the experimental results obtained from the real wireless transceivers."

For more information on this research see: Modeling and Estimation of Transient Carrier Frequency Offset in Wireless Transceivers. IEEE Transactions on Wireless Communications, 2014;13(7):4038-4049. IEEE Transactions on Wireless Communications can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Wireless Communications - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7693)

The news correspondents report that additional information may be obtained from J. Yuan, Univ Texas Dallas, Dept. of Elect Engn, Richardson, TX 75080, United States.

Keywords for this news article include: Richardson, Texas, United States, North and Central America, Wireless Communications and Networks

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Source: Journal of Mathematics


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