Investigating Validity of Wide-Sense Stationary Assumption in Millimeter Wave Radio Channels | IEEE Journals & Magazine | IEEE Xplore

Investigating Validity of Wide-Sense Stationary Assumption in Millimeter Wave Radio Channels


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mmWave radio channels are not WSS in slow-time domain.

Abstract:

In this paper, impact of antenna directivity and bandwidth on the small scale fading statistics have been analyzed for millimeter-wave (mmWave) radio channels. For this p...Show More
Topic: Millimeter-wave and Terahertz Propagation, Channel Modeling and Applications

Abstract:

In this paper, impact of antenna directivity and bandwidth on the small scale fading statistics have been analyzed for millimeter-wave (mmWave) radio channels. For this purpose, small-scale fading measurements at the mmWave frequency band (58-62 GHz) are carried out using transmit and receive antennas with different antenna directivities (emulated beamforming gains). Measurements emulate a non line-of-sight scenario when the communication between transmit and receive antennas is possible only through a single multipath cluster. In order to compare results, measurements in a line-of-sight scenario with omni-directional antennas are also carried out for reference purpose. Considering two main mmWave system features i.e., high antenna directivity and higher system bandwidth, we report the following results: 1) Randomness/fading in the received signal magnitude vanishes with an increase in bandwidth. 2) The channel impulse response h (t, τ) does not remain a wide-sense stationary (WSS) random process in the slow-time domain i.e., along t, where, the fast-time domain refers to the dimension along τ. 3) Measured channels are WSS in the frequency domain and the coherence bandwidth increases when propagation channels are illuminated with high gain antennas.
Topic: Millimeter-wave and Terahertz Propagation, Channel Modeling and Applications
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mmWave radio channels are not WSS in slow-time domain.
Published in: IEEE Access ( Volume: 7)
Page(s): 180073 - 180082
Date of Publication: 05 December 2019
Electronic ISSN: 2169-3536

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