Pilot-Assisted Short Packet Transmission over Memoryless Block-Fading Channels
Paper i proceeding, 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 & Guillen i Fabregas, 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.

Channel estimation

Maximum likelihood decoding

Fading channels


Error probability



Guido Ferrante

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Johan Ostman

Giuseppe Durisi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Kittipong Kittichokechai

Annual Conference on Information Sciences and Systems (CISS)

2018 52nd Annual Conference on Information Sciences and Systems (CISS)
Princeton, 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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