Pilot-Assisted Short-Packet Transmission over Multiantenna Fading Channels: A 5G Case Study
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2018

Leveraging recent results in finite-blocklength information theory, we investigate the problem of designing a control channel in a 5G system. The setup involves the transmission, under stringent latency and reliability constraints, of a short data packet containing a small information payload, over a propagation channel that offers limited frequency diversity and no time diversity. We present an achievability bound, built upon the random-coding union bound with parameter s (Martinez & Guillén i Fàbregas, 2011), which relies on quadrature phase-shift keying modulation, pilot-assisted transmission to estimate the fading channel, and scaled nearest-neighbor decoding at the receiver. Using our achievability bound, we determine how many pilot symbols should be transmitted to optimally trade between channel-estimation errors and rate loss due to pilot overhead. Our analysis also reveals the importance of using multiple antennas at the transmitter and/or the receiver to provide the spatial diversity needed to meet the stringent reliability constraint.

machine-type communications

multiple antennas

finite-blocklength information theory

ultra-reliable low-latency communications

fading channels


Guido Ferrante

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Johan Östman

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Giuseppe Durisi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Kittipong Kittichokechai

Ericsson AB

52th Annual Conference on Information Sciences and Systems (CISS)
Princeton, NJ, USA,

Teori och praktik för optimal spektral effektivitet i trådlösa ad-hoc nät med strikta krav på latens och tillförlitlighet.

Vetenskapsrådet (VR), 2015-01-01 -- 2018-12-31.

SWIFT : short-packet wireless information theory

Vetenskapsrådet (VR), 2017-01-01 -- 2020-12-31.


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