MLP/BP-based Decision Feedback Equalizers with High Skew Tolerance in Band-Limited Channels

A multi-layered perceptron neural network with backpropagation algorithm (MLP/BP) is realized as a waveform equalizer for distorted nonreturn-to-zero (NRZ) data recovery in band-limited channels. Moreover, the proposed approach can tolerate sampling clock skew and channel response variance. According to simulation results, the proposed design can recover severe distorted NRZ data with better performance than LMS DFEs in the band-limited channel that the data rate is ten times as much as the channel bandwidth. Under the 20% channel response variance and the 30% sampling clock skew, the proposed approach can provide an acceptable performance.

[1]  Chin-Teng Lin,et al.  Neural fuzzy systems , 1994 .

[2]  Bang-Sup Song,et al.  NRZ timing recovery technique for band limited channels , 1996, 1996 IEEE International Solid-State Circuits Conference. Digest of TEchnical Papers, ISSCC.

[3]  R. Mooney,et al.  8-Gb/s source-synchronous I/O link with adaptive receiver equalization, offset cancellation, and clock de-skew , 2005, IEEE Journal of Solid-State Circuits.

[4]  Chen-Yi Lee,et al.  A MLP/BP-based equalizer for NRZ signal recovery in band-limited channels , 2000, Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144).

[5]  Irving S. Reed,et al.  The use of neural nets to combine equalization with decoding for severe intersymbol interference channels , 1994, IEEE Trans. Neural Networks.

[6]  Benjamin Van Roy,et al.  Solving Data Mining Problems Through Pattern Recognition , 1997 .

[7]  R. Mooney,et al.  An 8Gb/s source-synchronous I/O link with adaptive receiver equalization, offset cancellation and clock deskew , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).

[8]  Hong-June Park,et al.  A 3Gb/s 8b single-ended transceiver for 4-drop DRAM interface with digital calibration of equalization skew and offset coefficients , 2005, ISSCC. 2005 IEEE International Digest of Technical Papers. Solid-State Circuits Conference, 2005..

[10]  Masoud Salehi,et al.  Contemporary Communication Systems Using MATLAB , 1999 .

[11]  W. T. Illingworth,et al.  Practical guide to neural nets , 1991 .

[12]  S. Siu,et al.  Decision feedback equalisation using neural network structures and performance comparison with standard architecture , 1990 .

[13]  Sammy Siu,et al.  Multilayer perceptron structures applied to adaptive equalisers for data communications , 1989, International Conference on Acoustics, Speech, and Signal Processing,.

[14]  Hong-June Park,et al.  A 2.2 Gbps CMOS look-ahead DFE receiver for multidrop channel with pin-to-pin time skew compensation , 2003, Proceedings of the IEEE 2003 Custom Integrated Circuits Conference, 2003..