Optimal Precoders for Tracking the AoD and AoA of a mmWave Path
Journal article, 2018
In millimeter-wave channels, most of the received energy is carried by a few paths. Traditional precoders sweep the angle-of-departure (AoD) and angle-of-arrival (AoA) space with directional precoders to identify directions with largest power. Such precoders are heuristic and lead to suboptimal AoD/AoA estimation. We derive optimal precoders, minimizing the Cramér–Rao bound (CRB) of the AoD/AoA under a given uncertainty range, assuming a fully digital architecture at the transmitter and spatial filtering of a single path. The precoders are found by solving a suitable convex optimization problem. We demonstrate that the accuracy can be improved by at least a factor of two over traditional precoders, and show that there is an optimal number of distinct precoders beyond which the CRB does not improve.
antenna arrays
array signal processing
Uncertainty
Transmitters
precoding
Millimeter wave communication
Receivers
Radar tracking
optimization
Signal to noise ratio
Channel estimation
Cramér–Rao bounds
antenna radiation patterns
Estimation
Author
Nil Garcia
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Henk Wymeersch
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Dirk Slock
EURECOM
IEEE Transactions on Signal Processing
1053-587X (ISSN) 1941-0476 (eISSN)
Vol. 66 21 5718-5729 8466652COPPLAR CampusShuttle cooperative perception & planning platform
VINNOVA (2015-04849), 2016-01-01 -- 2018-12-31.
High precision positioning for cooperative ITS applications
European Commission (EC) (EC/H2020/636537), 2015-01-01 -- 2017-12-31.
Fifth Generation Communication Automotive Research and innovation (5GCAR)
European Commission (EC) (EC/H2020/761510), 2017-06-01 -- 2019-05-31.
Areas of Advance
Information and Communication Technology
Subject Categories
Signal Processing
DOI
10.1109/TSP.2018.2870368