Direction of Arrival Estimation in Multiple Antenna Arrays by Using Power Delay Profile for Random Access Performance in 5G Networks

Year 2019, Volume: 7 Issue: 2, 202 - 207, 30.04.2019

Omer Aydın

https://doi.org/10.17694/bajece.537262

Cited By: 1

Abstract

In the transition from 4G to 5G, various solutions are being
developed to improve performance for features such as data rates, latency,
connectivity density and reliability. One of these features is Random Access
Procedure because of the increasing number of users in 5G networks. In the
random access method, user equipment performs a random access to the base
station with a preamble and thus register itself to the base station. However,
if more than one user equipments use the same preamble at the same time,
collision occurs and the registration process in the base station could be
halted. In this paper, a new method is proposed which can be used to calculate
Direction of Arrival between adjacent antenna signals in the antenna array with
the help of the phase differences. Thus, the collision can be avoided by using
the beamforming technique of the MIMO system using the calculated arrival angle
of the user equipment. The proposed method is verified for two user equipments
placed at different angles, at different distances to an antenna array
consisting of 10 antennas.

Keywords

Direction of Arrival (DOA), Power Delay Profile, Preamble

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