Localization Bound based Beamforming Optimization for multicarrier mmWave MIMO

Remun Koirala (1, 2, 3) , Benoit Denis (3) , Davide Dardari (1) , Bernard Uguen (2)

1 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
2 IETR - Institut d'Électronique et des Technologies du numéRique
3 CEA-LETI - Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information

In this paper we study optimal beamforming policy to minimize the Cramer Rao Lower Bound (CRLB) of joint angle of arrival (AoA) and time delay estimation for a multicarrier millimeter wave (mmWave) system. Considering one single base station (BS) with rough a priori knowledge of channel coefficients and location information of the mobile station (MS), we show that it is possible to improve the accuracy of AoA and time delay estimation, and hence of mobile station (MS) positioning, by means of optimized beamforming. Mathematical formulation of the CRLB is first introduced and the related optimization problem is solved for a each single subcarrier independently. Then we propose a solution optimizing the beamformer jointly for the multicarrier system. A few examples are provided to illustrate the benefits from bound-based beamforming optimization.

Domaines: Réseaux et télécommunications [cs.NI]; Electronique

Remun Koirala, Benoit Denis, Davide Dardari, Bernard Uguen. Localization Bound based Beamforming Optimization for multicarrier mmWave MIMO. 14th Workshop on Positioning, Navigation and Communications (WPNC), Oct 2017, Bremen, Germany. ⟨hal-01737249⟩