Analysis of the Realistic Resolution with Angle of Arrival for Indoor Positioning

Abstract

Increasing importance of localizing objects in indoor environments is the motivation for many research on localization algorithms. This paper focuses on the maximum achievable resolution for Angle of Arrival as a means to position objects inside rooms using equipment within the field of wireless sensor networks, thus dealing with restricted resources. A clear view on beamforming using antenna arrays is represented and is proven to be useful in Angle of Arrival measurements. The choice of the linear antenna array as most appropriate solution is motivated. A detailed overview of the algorithm, used to calculate the maximum realistic resolution, leads us to draw conclusions concerning the resolution. Depending on the number of anchor nodes and the composition of the antenna arrays, a reference value can be defined to calculate the realistic resolution for all room dimensions.

Evaluation of angle of arrival estimation for localization in multiple indoor environments

“…All elements are positioned at the same height of 1 m. This setup was chosen because it was proven to be the most effective in [9]. In the considered setup, the transmitter only transmits a signal carrier.…”

“…A short overview of the functionality of these blocks is given below. For more details we refer to [10].…”

A 2.4 GHz phase locked loop for a linear phased antenna array

“…In the current setup [4], the reference phase, required by the phased antenna array, is provided by a single highfrequency generator which is used to provide a signal to both the transmitter and the receivers LO ports. Consequently, there is a cable connection between the transmitter and the receivers, which in practice is inconvenient.…”