This paper discusses a result for error control techniques based on retransmissions, most notably hybrid automatic repeat request schemes. We assume that the underlying coding technique is described by the so-called reliable region. Under this assumption, we derive the channel distribution after a frame is either acknowledged or discarded. This is derived within an entirely analytical framework, where we show that such a distribution can be found as the result of an iterative process. Remarkably, this distribution is not the same as the steady-state channel distribution, and can be significantly different from it. Thus, using one instead of the other can lead to evaluation errors, which instead are avoided by our model.
On the channel statistics in Hybrid ARQ systems for correlated channels
BADIA, LEONARDO;ZORZI, MICHELE
2009
Abstract
This paper discusses a result for error control techniques based on retransmissions, most notably hybrid automatic repeat request schemes. We assume that the underlying coding technique is described by the so-called reliable region. Under this assumption, we derive the channel distribution after a frame is either acknowledged or discarded. This is derived within an entirely analytical framework, where we show that such a distribution can be found as the result of an iterative process. Remarkably, this distribution is not the same as the steady-state channel distribution, and can be significantly different from it. Thus, using one instead of the other can lead to evaluation errors, which instead are avoided by our model.Pubblicazioni consigliate
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