Patent Number:
6,167,553
Title:
Spiral scrambling
Abstract:
A system and a method for transforming an N-bit input value into a transformed N-bit output value which may be used for error correction coding or ciphering of the N-bit input value. In a representative embodiment, the system comprises means for providing a set of all possible N-bit values as a plurality of mutually exclusive subsets each containing at least one possible N-bit value; means for comparing the N-bit input value with each of the subsets to determine to which one of the subsets the N-bit input value belongs; and means for selecting as the transformed N-bit output value an N-bit value from another one of the subsets. In accordance with the present invention, each of these subsets may be cyclically generated in a linear feedback shift register (LFSR) or, alternatively, stored in a memory.
Inventors:
Dent; Paul W. (Pittsboro, NC)
Assignee:
Ericsson Inc.
International Classification:
H04L 9/18 (20060101); H04L 9/06 (20060101); H04L 9/26 (20060101); G06F 007/02 ()
Expiration Date:
12/26/2017