Ericsson Careers

Principal Developer - Linearization Technology

Stockholm, Sweden
Research & Development

English (US)

Job Description

Date: Jan 24, 2019

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Job Summary:

Non-linearities are physical realities of power amplifiers and is an area of broad studies in academia and industry since it affects both performance and power efficiency of the radio. Digital radio signal processing algorithms are core enhancers of overall radio link performance – Digital Pre-Distortion (DPD) and Crest Factor Reduction (CFR clipping) are examples of such algorithms in use at Ericsson today.


A well-functioning linearization algorithm enables the power amplifier to be used at higher output power than without linearization, thus an enabler of improved higher radio power efficiency.


The use of multi-band radios and the introduction of new wider frequency bands make linearization more difficult since the computational requirements relate directly to the linearized bandwidth. Broadband and/or multiband PAs may also require linearization algorithms/solutions that differ from what is used today.


The linearization algorithms can be implemented in different ways, from hardware (e.g. ASICs) to more soft realizations (e.g. VSPs/DSPs or FPGAs), all depending on what to optimize the radio for. Various simulation tools and testbeds are used during the development to ensure that real-time requirements are met.


The Principal Developer shall focus on the technical challenges, described above, and be the technical leader keeping the area together over organizational boundaries and the different development phases. The aim is a common linearization solution, both in terms of technology choice as well as development environment, that is modular and scales such that it can be reused between the different radios in the Ericsson product portfolio.
The Principal Developer position belongs to the DNEW PDU Radio Hardware organization.


The Principal Developer has the following responsibilities: 
›    Drive and evolve the linearization function solutions to ensure the realization, integration and verification aspects are considered to minimize cost and maintenance
›    Drive and continuously improve a global common way of developing, implementing, validating and verifying the linearization function
›    Drive the linearization road map together with technical area leader to ensure a technology leadership within the linearization function domain
›    Act as authority when it comes to evolving the architecture of the linearization function
›    Drive innovation within the linearization area globally and within own organization
›    Act as glue between technical sub areas within the algorithms program to ensure re-use and evolvement to enable state of the art development environment and tools used
›    Drive and create a platform to connect to Academia and Industry to secure the latest and trends intelligence is used as input to development of the linearization function
›    Drive competence build up and act as mentor and coach for senior colleagues within linearization development


Application Process: 
The selection and interview process is ongoing. Therefore, send in your application in English as soon as possible. For any questions and clarifications reach out to the recruiter, Hema Powar,


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Primary country and city: Sweden (SE) || || Stockholm || R&D

Req ID: 255862