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In this paper, an OFDM-based high resolution, channel sounding (CS) method is proposed under T/2-spaced sampling. The proposed CS method consists of three iterative steps. In each iteration, it attempts to catch a new path with accurate fractional delay. Besides, it is equipped with EDC criterion for path order determination. The CFR-MSE performance can be greatly improved over the conventional LS...
This paper presents efficient and high performance multiuser detectors (MUD) for multi-code DS-CDMA uplink system under different system loading over severe CM4 UWB indoor channel dispersion. Under low to moderate loading (up to 4 users), we first present a RAKE with parallel bi-directional decision feedback (RAKE-PBDDF) MUD for solving the intersymbol, multi-code, and multiple access interferences...
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