| 摘要 |
The present invention is related to a circuit (1) for adaptive feedback equalisation comprising
- a feedforward filtering section (2) and a feedback filtering section (7) arranged for frequency domain filtering,
- a slicer (4) to slice a block of equalized symbols, whereby a block of sliced symbols is output,
- summing means (8) for summing the outputs of the feedforward filtering section and the feedback filtering section, thereby yielding said block of equalized symbols,
- first (9) and second (10) updating means to provide coefficient updates to the feedforward filtering section and to the feedback filtering section, respectively, whereby said first and second updating means are fed with a frequency domain converted block of error signals (11) indicative of the difference between the block of equalized symbols at the slicer input and the block of sliced symbols at the slicer output and for computing updates using said frequency domain converted block of error signals,
- time-domain compensation means (12) arranged for receiving a time-domain version of the updated filter coefficients of said feedback filtering section and for receiving symbols of the block of sliced symbols and for adding a feedback error compensation signal to the block of equalized symbols. |
