摘要
Thesub-land/sub-pitaffectsthecharacteristicofthetrackingerrorsignalwhichisgeneratedbytheconventionaldifferentialphasedetection(DPD)methodinthesignalwaveformmodulationmulti-level(SWML)read-onlydisc.Tosolvethisproblem,thispaperproposesanewtrackingerrordetectionmethodusingamplitudedifference.Basedonthediffractiontheory,theamplitudedifferenceisproportionaltothetrackingerrorandisfeasibletobeusedforobtainingtheoff-trackinformation.Theexperimentalsystemoftheamplitudedifferencedetectionmethodisdeveloped.Theexperimentalresultsshowthatthetrackingerrorsignalderivedfromthenewmethodhasbetterperformanceinuniformityandsignal-to-noiseratiothanthatderivedfromtheconventionalDPDmethodintheSWMLread-onlydisc.
出版日期
2010年10月20日（中国期刊网平台首次上网日期，不代表论文的发表时间）
