Apple

Cellular 5G /4G Physical Layer Firmware Engineer

Apple
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1 day ago
Bengaluru, IndiaSenior

Responsibilities

  • Implement 3GPP 4G/5G physical-layer protocols and control/data path processing algorithms for specialized cellular ASIC hardware.
  • Develop processing for channels and procedures such as PDCCH, PDSCH, PBCH, PUCCH, PUSCH, PRACH, HARQ, and tracking loops.
  • Design and implement algorithms for channel estimation, channel state feedback, interference cancellation, cell search and measurement, and beam measurement.
  • Collaborate with systems engineers to optimize signal-processing algorithms for firmware and hardware execution.
  • Work with silicon designers to define hardware interfaces, processors, buses, DMA, accelerators, and memory subsystems.
  • Specify, design, and implement firmware architecture for mobile wireless communications systems.
  • Develop and use pre-silicon emulation systems and virtual platforms for firmware design and hardware verification.
  • Evaluate tools for builds, formal verification, and testing, and define engineering methodologies and best practices.

Requirements

  • Experience with hardware control for 4G/5G physical-layer data-path processing.
  • Understanding of 4G and 5G 3GPP protocols.
  • Experience implementing digital signal-processing algorithms using specialized DSP hardware.
  • Strong understanding of linear algebra, digital signal-processing principles, software engineering, and computer science fundamentals.
  • Facility with C and C++, compilers, build tools, and source-control tools.
  • Significant experience with memory-constrained real-time operating systems and concurrent programming.
  • Solid understanding of computer architecture and hardware/software interfaces for high-speed communication subsystems.
  • Experience with silicon prototyping, emulation systems, and virtual platforms.
  • Proficiency debugging embedded software systems, with familiarity with UARTs, JTAG, and oscilloscopes.
  • Some mainstream operating-system application development and Python or Perl scripting experience.
  • Bachelor’s degree in electrical engineering, electronics and telecommunications, computer engineering, or computer science.

Tech Stack

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Apple

About Apple

10,000+ employees

Apple designs and sells consumer electronics, software, and services for consumers and professionals worldwide, including iPhone, Mac, iPad, Apple Watch, and AirPods, plus platforms like iOS/macOS and services such as the App Store, iCloud, Music, and TV+. Its business combines device sales with services and subscriptions and in-house silicon design. Founded in 1976, Apple is headquartered in Cupertino, California, and trades on NASDAQ as AAPL.

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