Master Thesis Passive Intermodulation Cancellation in LTE Trans. using adaptive signal processing

Stockholm, SE
den 20 oktober 2021
den 4 november 2021
Övriga jobb
As the tech firm that created the mobile world, and with more than 54,000 patents to our name, we've made it our business to make a mark. When joining our team at Ericsson you are empowered to learn, lead and perform at your best, shaping the future of technology. This is a place where you're welcomed as your own perfectly unique self, and celebrated for the skills, talent, and perspective you bring to the team. Are you in?

Come, and be where it begins.

Our Exciting Opportunity

In a commercial radio network, Radio Unit serves as an important link between physical layer and higher layers of the communication network.

Contemporary FDD radios are increasingly facing the problem of passive intermodulation (PIM) due to the usage of multiple wireless bands on a base station site, as well as multi-band and multi-standard radio operation through a shared antenna. The intermodulation distortion degrades the receiver sensitivity and is currently a major challenge for the telecom operator.

Digital cancellation is the contemporary technology for mitigating receiver sensitivity degradation due to PIM. It involves the generation of a baseband model for the PIM distorted signal through non-linear filtering and then subtracting this modelled signal from the victimized receiver signal.

This thesis will investigate the proposition of understanding and characterizing the intermodulation sources, explore the different aspect of non-linear effects including effect of signal power and diverse PIM sources. The thesis work will also involve using these insights into applying signal processing techniques for creating a PIM model for cleaning the receiver signal. The outcome of this study would be used to enhance existing PIM Cancellation capabilities in our Radio.

The thesis project is hosted by Product Development Unit Radio in Kista and is part of a team developing digital signal processing algorithms for future radio products. Come join us!

You will

  • Work on topics at the forefront of technology developing new concepts and related to radio, algorithms and architecture solutions for Ericsson Radio.
  • Work on exciting projects considering new uses cases in the industrial domain.
  • You will help to develop world-leading concepts and solutions for current and future Radio systems which will turn Ericsson's vision of empowering an intelligent, sustainable and connected world into reality.


  • Enrolled as a Master's student in Electrical Engineering, Computer Science, or a related field with an above average record of accomplishment.
  • Strong interest in wireless communication technology.
  • Must have knowledge of signal processing techniques.
  • Eager to learn, self-driven and open-minded with very good team working skills.
  • Excellent computer and programming skills, e.g. MATLAB, C++, python.
  • Proficiency in English, any other language will be an advantage.
  • Knowledge of data analysis techniques is an advantage.


Please submit your application in English and include a short motivation letter, CV and transcript of records combined into one PDF. Please mention the position reference in your motivation letter.

The process is ongoing, so make sure to apply as soon as possible!

Start date: January/February 2022

Location: Stockholm, Sweden.

You will report to the Product Development Leader

Recruiter: Emelie Nygård

Kindly note that we cannot process applications sent via email.

What's in it for you?

Here at Ericsson, our culture is built on over a century of courageous decisions. With us, you will no longer be dreaming of what the future holds - you will be redefining it. You won't develop for the status quo, but will build what replaces it. Joining us is a way to move your career in any direction you want; with hundreds of career opportunities in locations all over the world, in a place where co-creation and collaboration are embedded into the walls. You will find yourself in a speak-up environment where empathy and humanness serve as cornerstones for how we work, and where work-life balance is a priority. Welcome to an inclusive, global company where your opportunity to make an impact is endless.

What happens once you apply?

To prepare yourself for next steps, please explore here:

Do you believe that an organization fostering an environment of cooperation and collaboration to execute with speed creates better business value? Do you value a culture of humanness, where fact based decisions are important and our people are encouraged to speak up? Do you believe that diverse, inclusive teams drive performance and innovation? At Ericsson, we do.

We provide equal employment opportunities without regard to race, color, gender, sexual orientation, transgender status, gender identity and/or expression, marital status, pregnancy, parental status, religion, political opinion, nationality, ethnic background, social origin, social status, indigenous status, disability, age, union membership or employee representation and any other characteristic protected by local law or Ericsson's Code of Business Ethics.

Primary country and city: Sweden (SE) || || Stockholm || [[mfield2]]

Req ID: 619962

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