Cellular System Performance Characterization Engineer

Do you have a passion for invention and self-challenge? Do you thrive on pushing the limits of what's considered feasible. As part of a world class modem/RF team, you'll craft sophisticated groundbreaking embedded firmware that deliver more performance in our products than ever before. You'll work across fields to transform improved hardware elements into a single, integrated design. Join us, and you'll help us innovate new cellular technologies that continually outperform the previous iterations! By collaborating with other product development groups across Apple, you'll push the industry boundaries of what wireless systems can do and improve the product experience for our customers across the world. Do you want to have an impact on every single Apple product?

In this role, you can combine your passion with world cutting edge 5G technologies that shape our daily life and have great opportunities to explore the engineering process from different perspectives.

Description

Working on the bringup of the cellular end-to-end system including characterization and optimization of RF and system performance in the lab with an emphasis on 5G-NR. Collaborate with multi-functional teams to validate the data and control flows from the Baseband to RF in terms of the various critical metrics. Measure, prioritize, and analyze important metrics data in the lab, and present them with analytics tools. Conduct pre-silicon emulation-based bringup and validation of the cellular system. And simulation-based validation of the control flows and algorithms. Support and maintain high-quality daily Firmware releases.

Responsibilities:

Design in-house scripting tools and conduct troubleshooting during chipset bringup and characterization stages in lab environment that involves both chipsets and instrument automation under internal infrastructure.

Comply with system and hardware design specification to enhance measurement methodology and SW packages to improve coverage, efficiency and productivity in entire design validation process.

Collaborate with cross-functional teams to align technical requirements, perform data review presentation and resolve issues with complete documentation before tape out.

Support internal teams to maintain a high quality HW platform for daily FW release and continuous development.

Preferred Qualifications

MSEE is preferred.

Knowledge and understanding of 3GPP specs.

Experience with silicon prototyping, emulation systems, and virtual platforms.

Experience with analytics platform software (Tableau, Spotfire or similar).

Chipset Industry working experience.

Working understanding of multiple 4G/5G signaling, and wireless physical layer test equipment (Keysight/LitePoint/Anritsu/R&S) along with their automation interfaces.

Technical background in wireless system physical layer and protocols. Work experience in 5G-NR/LTE/UMTS (3G/2G)/WiFi.

Experience in bring up or performance characterization of wireless systems focusing on the PHY and RF layers.

Hands-on experience in cellular chipsets.

Minimum Qualifications

Minimum requirement of a bachelors degree.

Experience with Python, C/C++, Matlab, and efficient analysis and automation scripting.

Knowledge of RF performance metrics such as EVM, spectral mask, frequency error, power accuracy, etc.

Hands-on experience in bring up of RFIC in the lab, ability to efficiently use lab equipment (such as VSA, VSG, spectrum analyzer, signal generator, power meter, etc).

Understanding of communication theory and signal processing, AGC, beamforming, Tx power control, mitigation of radio impairments, and calibration algorithms.

Pay & Benefits

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $126,800 and $220,900, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple's discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple's Employee Stock Purchase Plan. You'll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses - including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.