Beamforming codebook adaption to antenna array imperfections

US10547362B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Sutharshun Varatharaajan · Erlangen, DE
• Markus Landmann · Erlangen, DE
• Marcus GROßMANN · Friedrichroda, DE

Key dates

• Filing date: Jul 26, 2019
• Grant date: Jan 28, 2020
• Expiry date: Jul 26, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B17/12
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A transmitter includes an antenna array having a plurality of antennas for a wireless communication with one or more receivers, and a precoder connected to the antenna array. The precoder applies a set of beamforming weights to the antenna array. The set of beamforming weights is selected from a codebook to transmit/receive beams or nulls pointing in selected directions. The codebook includes sets of beamforming weights for a plurality of directions. The beamforming weights are based on a first antenna array response matrix defined by a second antenna array response matrix and one or more transformation matrices. The first antenna array response matrix contains first array response vectors of the antenna array, the second antenna array response matrix contains second array response vectors determined using a model of the antenna array. The transformation matrices describe one or more characteristics of the antenna array.