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Cellular System Performance Characterization Engineer

Cellular System Performance Characterization Engineer

CompanyApple
LocationSunnyvale, CA, USA
Salary$143100 – $264200
TypeFull-Time
DegreesBachelor’s
Experience LevelMid Level

Requirements

  • BS with a minimum of 3 years of relevant experience.
  • 3 years experience in bring up or performance characterization of wireless systems focusing on the PHY and RF layers, as well as hands-on experience in cellular chipsets.
  • Solid understanding of communication theory and signal processing, AGC, beamforming, Tx power control, mitigation of radio impairments, and calibration algorithms.
  • Strong technical background in wireless system physical layer and protocols, as well as 5G-NR/LTE/UMTS (3G/2G)/WiFi.
  • Knowledge of RF performance metrics such as EVM, spectral mask, frequency error and power accuracy etc.
  • Working understanding of multiple 4G/5G signaling, and wireless physical layer test equipment (Keysight/LitePoint/Anritsu/R&S) along with their automation interfaces.
  • Hands-on experience in bring up of RFIC in the lab and ability to efficiently use lab equipment (such as VSA, VSG, spectrum analyzer, signal generator, power meter, etc).
  • Good experience with Python, C/C++, Matlab, and efficient analysis and automation scripting.

Responsibilities

  • 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.
  • Simulation-based validation of the control flows and algorithms.
  • Support and maintain high-quality daily Firmware releases.

Preferred Qualifications

  • MSEE or beyond is preferred.
  • Knowledge and understanding of 3GPP specifications.
  • Experience with silicon prototyping, emulation systems, and virtual platforms.
  • Experience with analytics platform software (Tableau, Spotfire or similar).
  • Work experience in 5G-NR/LTE/UMTS (3G/2G)/WiFi.