Error Bounds for Uplink and Downlink 3D Localization in 5G Millimeter Wave Systems
Journal article, 2018

Location-aware communication systems are expected to play a pivotal part in the next generation of mobile communication networks. Therefore, there is a need to understand the localization limits in these networks, particularly, using millimeter-wave technology (mm-wave). Towards that, we address the uplink and downlink localization limits in terms of 3D position and orientation error bounds for mm-wave multipath channels. We also carry out a detailed analysis of the dependence of the bounds on different system parameters. Our key findings indicate that the uplink and downlink behave differently in two distinct ways. First of all, the error bounds have different scaling factors with respect to the number of antennas in the uplink and downlink. Secondly, uplink localization is sensitive to the orientation angle of the user equipment (UE), whereas downlink is not. Moreover, in the considered outdoor scenarios, the non-line-of-sight paths generally improve localization when a line-of-sight path exists. Finally, our numerical results show that mm-wave systems are capable of localizing a UE with sub-meter position error, and sub-degree orientation error.

fisher information



position error bound


orientation error bound


Z. Abu-Shaban

Australian National University

University of New South Wales (UNSW)

Xiangyun Zhou

Australian National University

T. Abhayapala

Australian National University

G. Seco-Granados

Universitat Autonoma de Barcelona (UAB)

Henk Wymeersch

Chalmers, Electrical Engineering, Kommunikationssystem, informationsteori och antenner, Communication Systems

IEEE Transactions on Wireless Communications

1536-1276 (ISSN)

Vol. 17 8 4939-4954 8356190

COPPLAR CampusShuttle cooperative perception & planning platform

VINNOVA, 2016-01-01 -- 2018-12-31.

High precision positioning for cooperative ITS applications

European Commission (Horizon 2020), 2015-01-01 -- 2017-12-31.

Areas of Advance

Information and Communication Technology


Subject Categories


Communication Systems

Signal Processing



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