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A well-known method for balancing binary sequences, in the sense of forcing them to have as many zeroes as ones, was proposed by Knuth. It is based on the inversion of all bits beyond a certain balancing index, and communicating this index via a prefix. This principle has also been applied to balance runlength-limited (RLL) sequences. Another Knuth...
In this reported work, Knuth's balancing scheme, which was originally developed for unconstrained binary codewords is adapted. Presented is a simple method to balance the NRZ runlength constrained block codes corresponding to (d, k) constrained NRZI sequences. A short marker violating the maximum runlength or k constraint is used to indicate the ba...
An RDS-minimizing, multi-mode modulation coding scheme, using maximum run-length violating markers and based on the Knuth balancing approach, is applied to run-length limited sequences. Simulations are used to measure spectra and DC suppression performance. A comparison to EFM is included.
The Knuth codeword balancing approach is adapted to a DC-free, RDS-minimizing multi-mode coding scheme. Power spectra and sum variance metrics obtained with simulations are compared with those of the existing Knuth constructions, and error performance is evaluated for a binary symmetric channel.