ANFIS-based PRML system for read-out RF signal in DVD-ROM
Wenliang Chen, Chia-Chi Chen, Shing‐Chia Chen · 2002
In DVD-ROMs, the way to equalize the read-out radio frequency (RF) signal to reduce the jitter ratio is an important issue. In this paper, we investigate the characteristics of the optical channel model in DVD-ROMs and propose an adaptive neuro-fuzzy inference system (ANFIS) based equalizer, together with a Viterbi detector to form as a partial-response maximum-likelihood (PRML) system for DVD-ROMs. The jitter performance using an ANFIS-based equalizer is compared with that of other linear filter-based equalizers. A computer simulation showed that the proposed equalization method has better jitter performance than conventional linear filter-based equalizers for the optical channel in DVD-ROMs.