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In this paper, a Multi-band Space-Frequency Transmit Selection (Multi-band SFTS) scheme is proposed for MB-OFDM UWB systems to explore both transmit and receive diversity effectively through multiple transmit and receive antennas without violating the FCC Power Spectral Density (PSD) constraint for UWB. This proposed technique is able to achieve diversity gain in both spatial and frequency domain...
The very short transmission range for high data rate Ultra-Wideband (UWB) communication systems is an important factor that limits its potential applications. In the case when using Maximum Ratio Combiner (MRC) at receiver is expensive or impractical, gaining transmit diversity becomes critical. Transmitter beamforming without lowering its transmission power is no longer applicable to UWB due to the...
The shadowing in ultra wideband (UWB) channels may degrade the system performance significantly. Although UWB multipath channels exhibit high resolution in space and time. The large scale shadow fading were moderately correlated based on UWB indoor channel measurement. In this paper, a new modelling method for correlated shadowing with log-normal distribution in UWB multiple-input multiple-output...
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