On codes with spectral nulls at rational submultiples of the symbol frequency

Abstract

In digital data transmission (respectively, storage systems), line codes (respectively, recording codes) are used to tailor the spectrum of the encoded sequences to satisfy constraints imposed by the channel transfer characteristics or other system requirements. For instance, pilot tone insertion requires codes with zero mean and zero spectral density at… (More)
DOI: 10.1109/TIT.1987.1057334

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