| 摘要 |
<p>The signal is organised into trains of successive data, each containing at least two distinct reference blocks distributed among the useful symbols. Explicit fixed reference symbols are known to and/or identifiable by the receiver. Implicit reference symbols, inserted at predetermined places, are defined by links generated among the useful symbols by a predetermined code. Coarse and fine synchronisations (411,412) are followed by estimations of the discrete channel (421) and useful symbols (431), to which uniform conditional probabilities with maximum entropy are attributed. The channel estimate is revised (422) and the symbols are re-estimated (432) for recycling (44).</p> |
