Blind Decision Feedback Equalization With A Modified Trellis Decoder for ATSC DTV Receivers
We present a near-optimal blind decision feedback equalizer (DFE) for Advanced Television Systems Committee digital television (DTV) receivers.By adopting a modified trellis decoder (MTD) with trace back depth of 1 for the decision device in the DFE, we obtain a hardware-efficient near-optimal blind DFE approaching to the optimal DFE which has no error propagation. The MTD uses absolute distance instead of Euclidean distance for computation of a path metric, resulting in reduced computational complexity.Comparing to the conventional slicer,the MTD shows outstanding performance improvement of decision error probability and is comparable to the original trellis decoder using Euclidean distance. Reducing error propagation in the DFE leads to the improvement of convergence performance in terms of convergence speed and residual error.Simulation results show that the proposed blind DFE performs much better than the blind DFE with the slicer.
ATSC DFE blind equalization
Sung Ik Park Hyoung-Nam Kim Seung Won Kim
Broadcasting System Research Dept., ETRI, Korea Dept. of Electronics Engineering, Pusan National University, Korea
国内会议
北京
英文
53-60
2003-10-22（万方平台首次上网日期，不代表论文的发表时间）