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Spectral analysis of maximum entropy multitrack modulation codes

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1 Author(s)
Vasic, B.V. ; Kodak Res. Labs., Rochester, NY, USA

The problem of calculating the power spectral density of a constrained maxentropic vector sequence {an}, an=[ain]0⩽i⩽N-1, is considered. The constraints of the constituent sequences {ai n} are defined by the sofic systems Si presented by the directed graphs Gi, 0⩽i⩽N-1, but the vector sequence itself is constrained additionally, and given by a function φ of constituent graphs (G=φ(G0, ···, GN-1)). This class of vector constraints is met in parallel multitrack recording. The general case of a simultaneous recording on N tracks is considered, assuming that the common vector constraint is track-invariant

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Information Theory, IEEE Transactions on  (Volume:44 ,  Issue: 4 )