Chin. Phys. B
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Chin. Phys. B  2010, Vol. 19 Issue (10): 104209    DOI: 10.1088/1674-1056/19/10/104209
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A new tracking error detection method using amplitude difference detection for signal waveform modulation multi-level discs
Yan Ming-Ming, Pei Jing, Pan Long-Fa
Optical Memory National Engineering Research Center, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China

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