Fractionally spaced adaptive decision feedback equalizers with applications to ATSC DTV receivers

In this paper, according to the multi-channel model of the fractionally spaced linear equalizers, the symbol-spaced adaptive decision feedback equalizers (ADFE) are extended to the fractionally spaced adaptive decision feedback equalizers (FSADFE). We applied the FSADFE to the ATSC DTV receivers. The ADFE converges very slowly when the channel presents severe characteristic that results in poor performance. FSADFE can deal with this DFE weakness and the performance gain between them is considerable. This gain benefits the DTV receivers, especially in some severe channels.

[1]  Monisha Ghosh.  Blind decision feedback equalization for terrestrial television receivers , 1998 .

[2]  John R. Treichler,et al.  Fractionally spaced equalizers. How long should they really be , 1996 .

[3]  Dae Jin Kim,et al.  Timing-offset independent equalization techniques for robust indoor reception of ATSC DTV receivers , 2000, 2000 Digest of Technical Papers. International Conference on Consumer Electronics. Nineteenth in the Series (Cat. No.00CH37102).

[4]  Philip Schniter,et al.  Blind equalization using the constant modulus criterion: a review , 1998, Proc. IEEE.

[5]  S. Qureshi,et al.  Adaptive equalization , 1982, Proceedings of the IEEE.

[6]  John G. Proakis,et al.  Digital Communications , 1983 .

[7]  Inbar Fijalkow,et al.  Fractionally spaced equalizers , 1996, IEEE Signal Process. Mag..

[8]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .