Principle System Engineer, Microwave & RF Backhaul / Access

Location: Permanent / Contract

Position Type: Sweden

Responsibilities:

• Design and develop microwave & RF Backhaul / Access systems up to 40 GHz, including the system architecture, high level specifications requirements, key MMICs and sub-system chipset solution evaluation.
• Work with team in headquarters on module design, debug, integration, and troubleshooting.
• Focus on quality and yield related issues during the mass production including design method, integration, testing and components consistency, etc.
• Work on advanced microwave & RF technology research and development.

Requirements

• More than 10 years experience on microwave & RF products up to 40GHz.
• In-depth knowledge of microwave digital radio design and development, communication theory and practices (E1, T1, SDH, PDH, Ethernet, Etc).
• Familiar with ETSI and FCC regulatory requirements
• Excellent hands-on experience in developing microwave & RF products and experiments to find out the best balanced design on cost, high-volume, and performance.
• Proficient in digital radio test methods and use of test equipment Excellent experience on volume production quality and yield related issues in the design, including assembling, testing and components consistency.
• Sensitive insight on novel technique and development trend.
• Ability to develop and prove innovative solutions.
• Master degree plus in Electrical Engineering.
• Fluent in spoken and written English
• Excellent communication and working skills in multi-cultural team environment.

Send a copy of your CV to : cv[at]esfab.net

Principle Wireless Algorithm & Protocol Engineer, Microwave backhaul

Location: Permanent / Contract

Position Type: Sweden

Responsibilities:

• Develop Algorithm of the baseband modulator/demodulator for Microwave & RF Backhaul/Access products.
• R&D experiences in microwave protocol & baseband signal processing algorithms
• Responsible for system algorithm design and simulation.
• Plan for Algorithm implementation and optimization in integrated circuits.
• Work on FPGA simulation and system verification
• Work closely with HW/SW engineers to verify the algorithm in hardware platform.

Requirements:

• More than 10 years experience on microwave backhaul algorithm design.
• Proficient in digital signal processing, synchronization in digital communications, DPLL design, etc.
• Good knowledge of wireless communications.
• Proficient in ANSI C and simulation tools, such as Matlab, etc.
• Bachelor or higher degree in electrical engineering.
• Fluent in spoken and written English.
• Sensitive insight on novel technique and development trend.
• Excellent communication and working skills in multi-cultural team environment.
• The ability to develop and prove innovative solutions.

Please send us a copy of your CV in MS Word format , in English to cv[at]esfab.net

DPD（Digital Pre-Distortion） Expert

Position: Contract 12- 24 month

Location: Sweden

Job Description:

Principal engineer for the development of digital power amplifier linearization algorithms. Also known as digital pre-distortion algorithms.

Responsibilities:

• Research and develop next generation DPD algorithms operating on wide bandwidths, with extreme performance requirements, and/or over multiple TX bands.
• Create new power amplifier models which take into account transient effects of changing input signals.
• Assist the implementation team in creating the final commercial product.

Candidate required skills:

• Must have experience with non-linear systems.
• MS/PhD in engineering or equivalent
• Strong verbal and written English skills so as to create detailed technical reports to be sent to the implementation group.
• Must be able to communicate via email and telephone with development teams spread across multiple locations.
• Able to assist the ASIC department in architecting an ASIC to implement DPD algorithms.

Candidate desired (but optional) skills:

• Experience with Volterra-Wiener systems.
• Prior experience with analog or digital linearization of power amplifiers.
• Prior experience in the wireless infrastructure industry (GSM, WCDMA, LTE, WiMax, etc.)
• Familiar with digital transmitters including digital IF, clipping/ crest factor reduction (CFR).

Send your CV to : cv[at]esfab.net

Microwave Protocol & Baseband Signal Processing Senior Engineers

Position: Microwave Protocol & Baseband Signal Processing Senior Engineers

Key requirements:

• 3 to 5+ years direct R&D experiences on Microwave Protocol & Baseband Signal Processing algorithms

• Fluent in English

Job description：Work together with Microwave team and Microwave Department to develop commercial Microwave mobile backhaul systems.

Employment: Permanent employee or consultant

To apply: Send us a copy of your CV in English to cv [at] esfab.com

Microwave RF Senior Engineers

Position: Microwave RF Senior Engineers

Key requirements:

• Has 5+ years direct R&D experiences on Microwave RF system development from 10+ GHz up to 38GHz bands
• Working experience above 38GHz bands is an advantage
• Knowledge on baseband signal processing of the Microwave system is an advantage
• Fluent in English

Job description：Work together with Microwave team and Microwave Department to develop commercial Microwave mobile backhaul systems. Proposing RF system design scheme, writing specifications, selecting components/processes, designing part of the RF system, solving difficult problems, etc.

Employment: Permanent employee or consultant (in case of consultant, contract period could be at least for one year if the consultant). The client Will provide competitive salary package.

Send a copy of your CV in English to : cv[at]esfab.com

DPD（Digital Pre-Distortion）algorithms development for RF units in commercial base stations

Position: DPD（Digital Pre-Distortion）algorithms development for RF units in commercial base stations

Key requirements:

l Has 2 to 5 years direct R&D experiences on DPD algorithms for base stations

l Be able to improve DPD algorithms for certain power amplifiers to make the RF units achieving good performance

l Working experience on Multi-carrier GSM DPD algorithms R&D for base stations is an advantage

l Knowledge on power amplifier design is an advantage

l Fluent in English

Job description：Work together with RF team to propose and develop DPD algorithms for commercial base stations.

Employment: Permanent employee or consultant (in case of consultant, contract period could be at least for one year if the consultant). The client Will provide competitive salary package.

send a copy of your CV in English to : cv[AT]ESFAB.COM

Sr. Digital Pre-distortion Algorithm Engineer

Location: Sweden

Position Type: Permanent or Contract

Duration: Contract (12month)

Start Date: ASAP

Send A copy of your CV to: cv[at]esfab.com

URL: www.esfab.com

We are seeking for qualified Sr. digital pre-distortion algorithm engineers for our client's worldwide Mobile system turnkey projects.

Good technical knowledge on GSM/WCDMA/LTE

This person needs to have strong experience at base station side digital pre-distrotion algorithm experience for GSM/WCDMA/LTE commercial systems. This person needs to be a technical leader and driver, be able to work independently and in a team, to develop digital pre-distrotion algorithms for our commercial systems.

Requirements:

• Required Industry Experience 5 Years

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