A new tracking error detection method using amplitude difference detection for signal waveform modulation multi-level discs-中国Betway体育网页登陆

摘要 Thesub-land/sub-pitaffectsthecharacteristicofthetrackingerrorsignalwhichisgeneratedbytheconventionaldifferentialphasedetection(DPD)methodinthesignalwaveformmodulationmulti-level(SWML)read-onlydisc.Tosolvethisproblem,thispaperproposesanewtrackingerrordetectionmethodusingamplitudedifference.Basedonthediffractiontheory,theamplitudedifferenceisproportionaltothetrackingerrorandisfeasibletobeusedforobtainingtheoff-trackinformation.Theexperimentalsystemoftheamplitudedifferencedetectionmethodisdeveloped.Theexperimentalresultsshowthatthetrackingerrorsignalderivedfromthenewmethodhasbetterperformanceinuniformityandsignal-to-noiseratiothanthatderivedfromtheconventionalDPDmethodintheSWMLread-onlydisc.

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A new tracking error detection method using amplitude difference detection for signal waveform modulation multi-level discs

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