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Optimal soft-output detector for channels with intersymbol interference and timing errors

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2 Author(s)
Wei Zeng ; Div. of Eng. & Appl. Sci., Harvard Univ., Cambridge, MA, USA ; Kavčić, A.

We address the issue of detecting transmitted (or recorded) symbols when there is a timing error in the sampled waveform, along with intersymbol interference (ISI) and additive channel noise. We built a special trellis to jointly characterize the timing uncertainty and the channel ISI. The method derived here provides the joint maximum a posteriori probability detection of each input symbol and the quantized timing offset of each sample. It also generates "soft" decisions, which are essential for soft-decision iterative decoding algorithms.

Published in:

Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 5 )

Date of Publication:

Sept. 2003

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