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This paper explores the impact of frequency selective fading on wireless channels. Unlike previous works that limited their investigations only to the narrowband or to the ultrawideband channels this paper explores the transition between these two cases. It shows that the Gamma distribution is a suitable probability density function for description of fading for channels with bandwidth varying from...
We show a significant discrepancy between the range estimates and the actual performance of an ultrawideband wireless system based on the Wimedia standard. We also show this discrepancy to be linked to the combination of frequency selectivity of the ultrawideband channel and the low dynamic range available to ultrawideband receiver. We propose an alternative means of range estimation combining the...
This paper explores the performance of a commercial WiMedia Multi-Band OFDM Ultrawideband development kit in a confined environment. It confirms previous predictions that the forward error correction schemes of WiMedia systems might not be sufficient for confined environments with a high number of multipaths. A carefully designed environment is shown to be able to alleviate the issue and improve the...
In this paper, we investigate the performance of concatenated Reed Solomon and convolutional (RS-convolutional) codes for ultrawideband (UWB) multiband orthogonal frequency division multiplexing (MB-OFDM) systems. We show that RS-convolutional codes perform better than single codes at high energy-per-bit to noise ratio (Eb/N0). We also show that using a bit interleaver between the two concatenated...
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