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Polynomial complexity optimal detection of certain multiple-access systems

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2 Author(s)
Schlegel, C. ; Dept. of Electr. Eng., Utah Univ., Salt Lake City, UT, USA ; Grant, A.

It is demonstrated that optimal multiple-user detection in a linear multiple-access system with identical crosscorrelations requires only 𝒪(KlogK) operations instead of the worst case O(2K). A simple optimal detection algorithm is given, which when generalized has a complexity that is exponential not in the number of users but in the number of unique crosscorrelation values

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Information Theory, IEEE Transactions on  (Volume:46 ,  Issue: 6 )