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`Shift and add' property of m-sequences and its application to channel characterisation of digital magnetic recording

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1 Author(s)
Y. Lin ; Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan

The `shift and add' property of maximum length pseudorandom binary sequences (m-sequences) is a well known property in which the module-two addition of any two identical m-sequences with different phases generates another identical m-sequence, but with another phase. The parameters of the `shift and add' property of an m-sequence are derived from the Galois field. Its application to channel characterisation of digital magnetic recording including nonlinearities is described. Finally, all the 63-bit and 127-bit m-sequences with parameters which describe the nonlinearities of the recording channel are tabulated

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IEE Proceedings - Communications  (Volume:142 ,  Issue: 3 )