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Interpolation Methods Applied to Telecommunication Problems

Paulo Ferreira
Universidade de Aveiro

In telecommunications, the data are often split into information units called packets, which are asynchronously transmitted. For several reasons, some of the packets may be lost or subject to unnaceptable delays, and error concealment becomes a necessity. Considerable effort has been spend studying methods for dealing with the lost data. Mathematically, the missing packet recovery is an interpolation problem, and there are several possible ways of looking at it and implementing interpolation methods that lead to improved performance in the presence of packet errors. We discuss some iterative and noniterative techniques for achieving this goal. The need for interleaving the data prior to transmission and its impact on the numerical stability of the problem is detailed.


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