Optimal Precoders for Tracking the AoD and AoA of a mmWave Path
Artikel i vetenskaplig tidskrift, 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.
Transmitters
Uncertainty
Millimeter wave communication
Receivers
precoding
Radar tracking
antenna radiation patterns
Signal to noise ratio
Channel estimation
Estimation
array signal processing
antenna arrays
optimization
Cramér–Rao bounds
Författare
Nil Garcia
Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem
Henk Wymeersch
Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem
Dirk Slock
EURECOM
IEEE Transactions on Signal Processing
1053-587X (ISSN)
Vol. 66 21 5718-5729Fifth Generation Communication Automotive Research and innovation (5GCAR)
Europeiska kommissionen (Horisont 2020), 2017-06-01 -- 2019-05-31.
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Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier
Signalbehandling
DOI
10.1109/TSP.2018.2870368