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Master thesis: Fast & reconfigurable Evaluation of Base Stations

Job Description

Date: Nov 6, 2019

Do you want to do your thesis with us in Göteborg? 

Would you like the chance to do your thesis together with one of the world’s leading technology companies? We are on a quest to enable communication for everyone and everything and we believe that we do that by being as innovative as possible. If you want to help us to be even more innovative – then you are on the right track! 

 

We want you to become a part of a truly global company working across borders in 180 countries, offering a diverse, performance-driven culture & an innovative & engaging environment where employees enhance their potential every day. Come and learn and grow with us at Ericsson. 

 

Background

An important part of the 5G standard is the conformance testing specification. It is indispensable in ensuring that functional, non-interfering Radio Access Networks can be built and deployed. For 5G, a new challenge related to base station (BS) equipment conformance testing arises: the introduction of integrated antenna systems, where antenna and radio unit are manufactured as one, non-separable unit. As a consequence the traditional approach of testing the radio at the antenna connector is no longer possible. The industry faces a paradigm shift, towards Over-the-air testing, and new testing methods.

 

One of these methods is the reverberation chamber (RC) which is a very attractive alternative to the anechoic chamber methods, due to its low cost, compact size, and high measurement speed, but challenges remain. As the RC is a resonant, low-loss cavity, large electric fields could build-up inside the chamber and invalidate the outcome. For high-output power BSs, this is a potential issue that obviously needs to be addressed.

 

Thesis Description

The work can be subdivided into three main parts which can have a more theoretical or practical focus, depending on the preference of the student(s): the fundamentals, the concept(s) & the verification

1.Work on an in-depth understanding of the situation and problem. 5G base stations & integrated antenna arrays. Theoretical background of RC and challenges related to BS testing,

2.A) Investigate methods for frequency selective adjustment of the RC environment: channel & power levels at the equipment under test.

 

B) Design and realize a proof-of-concept

3.Evaluation of the proof-of-concept

 

The thesis will be concluded with a result presentation for the Ericsson research team and Product Development Unit Radio (Antenna Competence Center).

 

Qualifications

This project aims at M.Sc. student in electrical engineering, engineering physics, or similar. Interest in electromagnetics, antenna, statistics, probability theory is a big plus. Practical experience from measurements in lab environment is of further merit.

 

Extent:

1 student, 30 hp

 

Location:

Ericsson Göteborg (Ericsson Research and Product Development Unit Radio)

 

Preferred Starting Date:

January 2020

 

Keywords:

5G NR, Conformance testing, Reverberation Chamber, Antennas, Electromagnetics

 

Application:

If you feel interested, please send in your application as soon as possible.

While applying please attach your updated CV, current grades and cover letter written in English into one document (under CV field in the application tool) and clearly define your technical knowledge.

If you have any additional questions, please contact our Recruiter Elzbieta Penpeska at elzbieta.penpeska@ericsson.com

 

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Primary country and city: Sweden (SE) || || Göteborg || Stud&YP

Req ID: 304795