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, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Henk Wymeersch

Chalmers, Elektroteknik, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Dirk Slock

EURECOM

IEEE Transactions on Signal Processing

1053-587X (ISSN)

Vol. 66 21 5718-5729

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Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Signalbehandling

DOI

10.1109/TSP.2018.2870368

Mer information

Senast uppdaterat

2018-12-14