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A convenient signalling scheme, called orthogonal on-off (O3), together with a simple one-shot linear decorrelating detector (LDD) and a RAKE bank, is adopted in asynchronous ultra- wideband (UWB) systems. The performance of the proposed system is evaluated over multipath fading channels. This investigation also analyses mathematically the effect of the maximal-ratio combining diversity technique...
In this paper, we present a robust multiuser detector for wireless multicarrier code-division multiple access (MC-CDMA) systems under time-varying narrowband interference (NBI). The conventional least-squares (LS) channel estimators and multiuser detectors will perform poorly when narrowband interfering signals contaminate the multicarrier systems. A new weighted least M-estimate (WLM) multiuser detector...
This paper presents a Kalman filtering channel estimator for wireless multicarrier code-division multiple access (MC-CDMA) communication systems. Joint Kalman filter and Kalman filter per-subcarrier schemes are employed to track the time-varying channel. Pilot symbols are equally-placed in the training subcarriers for channel estimation. The proposed pilot-aided channel tracking scheme presents better...
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