Minimum-Phase Impulse Response Channels

作者：Cassioli Dajana^*; Mecozzi Antonio

来源：IEEE Transactions on Communications, 2009, 57(12): 3529-3532.

DOI：10.1109/TCOMM.2009.12.0801082

• Channel modeling
• channel impulse response
• Hilbert transform
• minimum phase condition
• ultrawideband wireless systems

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.

• 出版日期2009-12