Senior Wireless PHY Software Engineer

You will be working on the design, development, and integration of calibration software modules for wireless communication systems using multiple antennas.

Design, development, integration, and testing calibration software modules for a next-generation fixed wireless broadband system. The primary focus is functionality in layer 1 of the proprietary 5G protocol, such as channel estimation, IQ imbalance correction, and LO leakage cancellation.

You will develop software running on both the base station and user equipment of a broadband wireless access system for various multicore DSP/ARM processors and real-time operating systems. You will collaborate closely with L2/L3 software groups and FPGA/ASIC teams to deliver cross-layer features.

Job Responsibilities:

• Design and develop scalable PHY/Calibration software modules on multi-core DSP/GPP using C/C++
• Define and develop unit test vectors using Matlab and C++ for the software modules and unit test extensively to deliver flawless modules
• Test and validate the performance of the software modules on the real system.
• Develop scripts to qualify the RF board testing

Required Skills & Experience:

• MS or PhD in Electrical Engineering/Computer Science with an emphasis in wireless communication and/or digital signal processing
• 5-12 years of industry experience in DSP software development for wireless communication systems (such as 5G, LTE, WiFi, or similar proprietary protocols)
• Formal understanding in communication and signal processing theory and techniques, with strong mathematical background in linear algebra
• Experience in developing and implementing wireless communications systems in at least one of the following areas:

• Array signal processing such as beam-forming and MIMO techniques for an OFDM system
• Physical/MAC/baseband layer software implementation for LTE/5G.
• Adaptive equalization, receiver synchronization, signal identification and recovery
• Experience with OFDM based system implementation
• Experience with version control systems, collaboration tools (wikis, ticket systems)
• Experience in scripting languages (python, bash, etc)

Knowledge and Skills:

• Formal understanding of communication and signal processing theory and techniques, including OFDM communication systems, and a strong mathematical background in linear algebra
• Strong background in C, C++, and Python programming
• Experience with software development for multi-core embedded systems, including real-time operating systems (RTOS), memory and cycle optimization, caches, multi-threaded programming, inter-process communication, and HW/SW interaction
• Comprehensive knowledge of one or algorithms used in wireless communications systems, and associated design and implementation in software. Relevant experience could be in areas such as:
  • RFIC impairments and compensations SW development and validation
  • Calibration procedures for multi-antenna based systems
  • Advanced array signal processing techniques, such as beam-forming and MIMO
  • Adaptive equalization, receiver synchronization, signal identification and recovery

Experience with version control systems (Git, Gerrit, Gitlab), and issue tracking and collaboration systems (Jira, Confluence)

Since our founding in 2009, we’ve been on a mission to accelerate the pace of bringing fast and affordable internet access — and all the benefits it provides — to the 90% of the world’s households who can’t get it. Through a decade of R&D and more than $400M of investment, we’ve created an entirely unique next-generation fixed wireless access technology, powering our first commercial platform, Gigabit 1 (G1). It delivers a game-changing advance in broadband economics in both mainstream and underserved markets, using either licensed or unlicensed spectrum. G1 started production in mid 2021 and has now been installed by over 160 service providers globally. We’re headquartered in Milpitas, California, with additional research and development in Pune, India.

G1 has been developed by an incredibly talented and pioneering core technical team. We are looking for more world-class problem solvers who can carry on our tradition of customer obsession and ground-breaking innovation. We’re well funded, growing incredibly quickly, maintaining a superb results-focused culture while we’re at it, and all grooving on the positive difference we are making for people all over the planet. If you want to help make a real difference in this world, apply now!

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