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Joint DFE and VTD with slice prediction for ATSC DTV receivers

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3 Author(s)
Fengkui Gong ; State Key Lab. of ISN, Xidian Univ., Xi''an ; Jianhua Ge ; Hongjun Li

A joint decision feedback equalizer (DFE) and variable trace-back depth trellis decoding (VTD) scheme (VTD-DFE) is proposed for the ATSC DTV receivers. Compared with previous arts, error propagation can be further decreased by adopting a trellis decoder with a variable trace-back depth (TBD) for the decision device in the DFE. Convergence is also greatly speeded by using a slice error detector, which performs slice prediction according to the corresponding confidence value of the decision symbol provided by TCM decoding. Simulation results show that the proposed VTD-DFE leads to an improvement of convergence performance in terms of both the convergence speed and the stability, especially when SNR is low

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:52 ,  Issue: 4 )

Date of Publication:

Nove. 2006

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