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Pilot Aided Direction of Arrival Estimation for mmWave Cellular Systems

Citation Author(s):
Ahmed Tewfik
Submitted by:
Mahbuba Ullah
Last updated:
5 September 2018 - 2:15pm
Document Type:
Presentation Slides
Document Year:
2016
Event:
Presenters:
Dr Ahmed Tewfik
 

Direction of arrival (DoA) estimation of high-resolution beams is critical for cell search and maintaining communication in millimeter wave (mmWave) cellular systems. All-digital solutions for DoA estimation, however desirable for their flexibility and performance, are impractical because of their use of high-speed, power hungry Analog-Digital Converters (ADCs) at each antenna element. In this paper we take a novel approach to formulate a fully digital DoA estimation solution. Our method utilizes mmWave propagation characteristics to properly design a pilot signal that enables the reduction of the ADC speed and the number of antenna by a significant amount while achieving a desired performance goal. Our proposed method applies subspace-based methods like MUSIC on the heavily subsampled received signals, and performs the DoA estimation on a small subset of the dominant multi-paths in the channel one at a time, thus maintaining the integrity of the DoA estimation algorithm while significantly reducing computational complexity.

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