Abstract
A (0,G/I) code is a modulation code used in the partial response maximum likelihood (PRML) recording system in which G and I represent the maximum number of zeros between two consecutive ones in the global sequence and the interleaved subsequences, respectively. For some magnetic recording systems such as the one with a helical scanning rotary head, a DC-balanced write waveform is required to meet channel requirements. In this study, charge-constrained (0,G/I:C) sequences which can generate a DC-balanced write waveform are investigated, where C represents the upper bound of charge. Based upon the runlength subgraphs and the transition matrices, capacities and power spectra of (0, G/I; C) sequences are derived and computed.
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