5G downlink multi-beam signal design for LOS positioning
Paper in proceeding, 2019
In this work, we study optimal transmit strategies for minimizing the positioning error bound in a line-of-sight scenario, under different levels of prior knowledge of the channel parameters. For the case of perfect prior knowledge, we prove that two beams are optimal, and determine their beam directions and optimal power allocation. For the imperfect prior knowledge case, we compute the optimal power allocation among the beams of a codebook for two different robustness-related objectives, namely average or maximum squared position error bound minimization. Our numerical results show that our low-complexity approach can outperform existing methods that entail higher signaling and computational overhead.
Author
Anastasios Kakkavas
Technical University of Munich
Huawei
G. Seco-Granados
Universitat Autonoma de Barcelona (UAB)
Henk Wymeersch
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Mario H.Castaneda Garcia
Huawei
Richard A. Stirling-Gallacher
Huawei
Josef A. Nossek
Federal University of Ceará
Technical University of Munich
2019 IEEE Global Communications Conference, GLOBECOM 2019 - Proceedings
9013374
2019 IEEE Global Communications Conference, GLOBECOM 2019
Waikoloa, USA,
Waikoloa, USA,
Subject Categories
Telecommunications
Control Engineering
Signal Processing
DOI
10.1109/GLOBECOM38437.2019.9013374