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Minimum-Phase Impulse Response Channels
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DOI：10.1109/TCOMM.2009.12.0801082.png)
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摘要
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We give a sufficient condition that insures that the impulse response of a channel is of minimum phase. The condition is that the energy of the first path be larger than the power spectral density of all subsequent paths. Establishing a lower bound to the first path energy, this condition is more likely to be met if transmitter and receiver are in line-of-sight. Our results show that the Hilbert transform may give unreliable results, if used to extract the channel phase response from frequency-resolved amplitude measurements when the first path is strongly attenuated.
Keyword:
Channel modeling
channel impulse response
Hilbert transform
minimum phase condition
ultrawideband wireless systems
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8.3
论文数:
1.2W
被引数:
3.6W
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