Pilot-Assisted Short-Packet Transmission over Multiantenna Fading Channels: A 5G Case Study
Paper in proceedings, 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.

fading channels

finite-blocklength information theory

ultra-reliable low-latency communications

multiple antennas

machine-type communications

Author

Guido Ferrante

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Johan Östman

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Giuseppe Durisi

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Kittipong Kittichokechai

Ericsson

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

Vol. 21 May 2018 1-6

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

SWIFT : short-packet wireless information theory

Swedish Research Council (VR), 2017-01-01 -- 2020-12-31.

Theory and practice for optimum spectral efficiency for ad-hoc wireless networks with strict requirements on latency and reliability

Swedish Research Council (VR), 2015-01-01 -- 2018-12-31.

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/CISS.2018.8362303

More information

Latest update

1/11/2021