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An Adaptive Partial Response Equalizer Using Branch Metrics of Viterbi Trellis for Optical Recording Systems  

Lee, Kyu-Suk (숭실대학교 정보통신전자공학부)
Lee, Joo-Hyun (숭실대학교 정보통신전자공학부)
Lee, Jae-Jin (숭실대학교 정보통신전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9C, 2005 , pp. 871-876 More about this Journal
Abstract
In this paper, we propose an improved partial response maximum likelihood (PRML) detection scheme that has an adaptive equalizer and can be applied in the asymmetric optical recording system with high-density. We confirmed that the proposed PRML detector improves detection performance. In addition, we implemented the detector by Verilog HDL. The adaptive equalizer is composed of tap coefficient updating unit using LMS algorithn and FIR filter. FIR filter is implemented by the transposed direct form architecture for high speed operation. Viterbi detector is implemented by the register exchange method.
Keywords
PRML; equalizer; optical recording system; asymmetric channel; VerilogHDL;
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