Method and apparatus for multicarrier communications

摘要

A data processing device (100, 300) is described forming part of a receiver for a multicarrier communications system. The data processing device is configured to process at least one observed symbol to generate an information bit estimate for the symbol, and includes a channel prediction stage configured to receive an observed symbol and at least one feedback signal representing an estimate of a transmitted symbol and to generate a channel prediction. At least one initial processing stream (104) is configured to process the observed symbol on the basis of a channel prediction calculated at a respective time by the channel prediction stage and to output a signal representing an estimate of a transmitted symbol corresponding to the observed symbol for feed back into the channel prediction stage. A subsequent processing stream (102) is configured to process the observed symbol on the basis of a channel prediction calculated at a second time by the channel prediction stage at least partly on the basis of an output of at least one initial processing stream in respect of the observed symbol, to generate an information bit estimate corresponding to the observed symbol.

主权项

1. A data processing device forming part of a receiver for a multicarrier communications system in which a sequence of symbols is transmitted on a plurality of subcarriers over a communication channel, the data processing device including:
a channel prediction element configured to receive an observed symbol and a feedback signal representing an estimate of at least one transmitted symbol in respect of at least one previously processed data symbol and to generate a channel prediction; an initial processing element configured to process the observed symbol on the basis of the channel prediction as calculated at a first time by the channel prediction element and to output the feedback signal for feed back into the channel prediction element; and a subsequent processing element configured to process a controllably delayed version of the observed symbol on the basis of the channel prediction as calculated at a second time by the channel prediction element at least partly on the basis of the feedback signal output from the initial processing element in respect of the observed symbol, to generate an information bit estimate for the observed symbol, wherein either or both of the initial processing element and the subsequent processing element comprise a soft-input decoder.