Wireless Systems Engineer

4 days ago

Sunnyvale, California, United States Apple Full time

Job Summary

At Apple, we're looking for a highly skilled Wireless Systems Engineer to join our team. As a key member of our dynamic group, you'll have the opportunity to craft upcoming products that will delight and encourage millions of Apple's customers every single day.

Key Responsibilities

  • Design and simulate state-of-the-art wireless transmitters for very high data rate applications.
  • Investigate innovative PA architectures, calibration algorithms, and processing structures for performance enhancement.
  • Architect HW/FW/SW partitioning of various calibrations for area and time efficiency.
  • Implement system models of the analog front-end design, impairments, and come up with right controls and calibrations in C and MATLAB for optimal system performances.
  • Work with digital designers to realize these methods with power and area efficient digital implementations.
  • Work with firmware designers to realize these methods with high efficiency software implementation, and possibility hardware acceleration.
  • Bring up, test, and characterize real silicon with relevant implementation in lab.

Requirements

  • BS and a minimum of 10 years relevant industry experience.
  • Experience in designing relevant signal processing for wireless communications systems.
  • Understand the methods to estimate various RF impairments via direct equipment measurement or self-testing via loopback.
  • Experience with MATLAB or Python and/or C/C++ for algorithm development, modeling, and simulation.
  • Hands-on experience on lab testing & characterization will be essential (such as spectrum analyzer, signal generator, signal analyzer, power meter, etc.).
  • Some understanding of RF and analog components/modules composited of wireless communication systems, the possible impairments from those components, their impact to OFDM signals, and the corresponding calibration and impairment reduction methods/algorithms.

Preferred Qualifications

  • MSEE/PhD with relevant experience.
  • Proven track record of optimization algorithm, and its applications to RF calibration.
  • Previous experiences on digital predistortion, crest-factor reduction, nonlinear crosstalk/interference cancellation, and real-chip bring-up in lab.
  • Understand communication theory & signal processing related algorithms design (such as timing recovery, signal estimation and detection, automatic gain control, channel estimation, equalization, coding theory, etc.).
  • Knowledge in existing wireless communication protocols: 5G-NR/LTE/WCDMA/GSM, WiFi, and/or Bluetooth/BLE.
  • Course works and experience in circuit design.

About Apple

At Apple, we work every single day to craft products that enrich people's lives. We're looking for talented individuals who share our passion for innovation and our commitment to excellence. If you're passionate about wireless systems engineering and want to be part of a dynamic team that's pushing the boundaries of what's possible, we want to hear from you.

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