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- W2538194290 abstract "The minimum variance (MV) technique minimizes output variance of a receiver subject to a constraint, which guarantees no cancellation of the desired signal while interference is mitigated. It has been successfully applied to multiuser detection for a direct sequence code-division multiple access (CDMA) system even when multipath channel is unknown. Its applicability in multiple access ultra-wideband (UWB) systems is investigated in this paper. First, similarities between a time-hopping (TH) UWB system using pulse position modulation (PPM) and a multirate CDMA system are explored where a code matrix for each user can be defined based on its unique TH sequence, similar to a spreading code matrix in a CDMA system. Meanwhile, modulation delays are transformed to amplitudes of pulses, yielding a virtually linear model. After following MV optimization procedures, the desired signal can be detected from outputs of a bank of receivers. Performance of the proposed detection criterion is analyzed and verified." @default.
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- W2538194290 date "2004-07-08" @default.
- W2538194290 modified "2023-09-25" @default.
- W2538194290 title "Minimum variance multiuser detection for impulse radio UWB systems" @default.
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- W2538194290 doi "https://doi.org/10.1109/uwbst.2003.1267813" @default.
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