Wireless Channel Modeling Perspectives for Ultra-Reliable Communications

Research output: Contribution to journalJournal article

Abstract

Ultra-Reliable Communication (URC) is one of the distinctive features of the
upcoming 5G wireless communication. The level of reliability, going down to
packet error rates (PER) of $10^{-9}$, should be sufficiently convincing in
order to remove cables in an industrial setting or provide remote control of
robots with mission-critical function. In this paper we present elements of
physical and statistical modeling of the wireless channel that are relevant for
characterization of the lower tail of the channel Cumulative Distribution
Function (CDF). There are channel models, such as Two-Wave with Diffuse Power
(TWDP) or Suzuki, where finding the full CDF is not tractable. We show that,
for a wide range of channel models, the outage probability at URC levels can be
approximated by a simple expression, whose exponent depends on the actual
channel model. Furthermore, it is seen that the two-wave model leads to
pessimistic predictions of the fading in the region of ultra-reliable
communications, while the CDFs of models that contain diffuse components have
slopes that correspond to the slope of a Rayleigh fading. We provide analysis
of the receive antenna diversity schemes for URC-relevant statistics and obtain
a new expression for Maximum Ratio Combining (MRC) in Weibull channels.
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Ultra-Reliable Communication (URC) is one of the distinctive features of the
upcoming 5G wireless communication. The level of reliability, going down to
packet error rates (PER) of $10^{-9}$, should be sufficiently convincing in
order to remove cables in an industrial setting or provide remote control of
robots with mission-critical function. In this paper we present elements of
physical and statistical modeling of the wireless channel that are relevant for
characterization of the lower tail of the channel Cumulative Distribution
Function (CDF). There are channel models, such as Two-Wave with Diffuse Power
(TWDP) or Suzuki, where finding the full CDF is not tractable. We show that,
for a wide range of channel models, the outage probability at URC levels can be
approximated by a simple expression, whose exponent depends on the actual
channel model. Furthermore, it is seen that the two-wave model leads to
pessimistic predictions of the fading in the region of ultra-reliable
communications, while the CDFs of models that contain diffuse components have
slopes that correspond to the slope of a Rayleigh fading. We provide analysis
of the receive antenna diversity schemes for URC-relevant statistics and obtain
a new expression for Maximum Ratio Combining (MRC) in Weibull channels.
Original languageEnglish
JournalIEEE Transactions on Wireless Communications
ISSN1536-1276
StateSubmitted - 2018
Publication categoryResearch
Peer-reviewedYes

    Research areas

  • Ultra-reliable communications, 5G, wireless channel models, fading, diversity, probability tail approximations, rare events
ID: 257018669