Data transmission method in digital transmission system

摘要

The method involves transmitting data packets in a digital transmission system, in which a turbo-encoding is performed for a channel encoding in a turbo-encoder at the transmitter side. A turbo-decoding with soft-decision output signals is performed in a turbo-decoder at the receiver side. For the implementation of an ARQ, the channel quality is estimated through a known parameter estimation method, and a variance of the soft-decision output signals is determined in the turbo-decoder. The correctness or inaccuracy of the transferred packet is determined, based on the channel quality and the variance of the soft-decision output signals, and a renewed transmission of at least part of a faulty packet is caused.