| 摘要 |
A method of determining an offset, modulo n, of at least one point with respect to a sequence of at least 2n symbols, the sequence consisting of a repeating codeword of a cyclic position code, the cyclic position code having length n and minimum distance d<SUB>min</SUB>, the method including: obtaining, from the sequence and at a position corresponding to the at least one point, a subsequence of length w symbols, where w>=n-d<SUB>min</SUB>+1; mapping the subsequence to a codeword of the cyclic position code most likely to match the subsequence in the presence of symbol errors in the subsequence; and determining an offset, in the sequence, of the codeword thus obtained, and thereby determining the offset of the at least one point.
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