Amazon Sr Communication Systems Engineer 

United States, Texas, Austin 

519834008

The Role:In this role you will:
• Work closely with implementation teams to evaluate and simulate expected system level performance and provide quick feedback on potential improvements
• Work with the PHY and Network teams to seamlessly integrate the link-layer within the Network stack.
• Integrate the various link-layers working closely with implementation teams.
• Verify link budget and RF line-ups in RF and IF configurations.
• Create time synchronized setups with signal generators / spectrum analyzers and use these to verify timing budgets.
• Architect and document time/frequency/space acquisition and tracking algorithms. Understand Doppler pre and post compensation techniques with CFO/SFO in LEO comms systems. Experience with channel emulators is a plus.
• Work with a team to develop novel customized test solutions using embedded programing to generate and capture waveforms in real-time. Experience with software defined radios is highly preferred.
• Work with a team and take responsibility for power, clock, RF, air, network debugging in lab.
• Contribute development-test bring up procedures with Linux, Python, bash scripting etc.
• Willing to work in lab environment and stay in front of the setups for debugging with reference equipment
• Willing to work on scripting to change a SW/HW pieces incrementally and understand its effect on payload (via probing RF, IF, clock, channel quality messages) with help of Specan, siggen, scope, frequency counter, attenuators etc.
• Unblock themselves with reaching out RF, ASIC, SW, Comsys, Testbed teams to move forward in testing and integration
• Ability to adapt test plans daily based on capabilities of HW/SW delivered by the dev teamsExport Control Requirement:

• Master’s degree in Electrical Engineering, related discipline, or equivalent experience
• 5+ years professional experience working in wireless communications at the system or implementation level.

• PhD with emphasis in broadband wireless or wireline communication systems
• Deep understanding of Multiple access systems such as OFDMA, TDMA, CDMA, etc.
• Experience in test automation setup and scripting languages such as Python/Perl/Matlab.
• Experience with software defined radios and embedded programming in C/C++ and VHDL/Verilog is a plus.
• Knowledge of ethernet protocols such as IP, UDP, TCP, HTTP and analysis tools such as Wireshark
• Must have the ability to work in a small team and drive to go beyond expectations to deliver results
• Experience with current software development processes and tools including Agile, TDD, BDD, CI, Git
• Broad spectrum of knowledge to be able to understand end-to-end network system architecture from wireless physical layer all the way up to application end-point
• Implementation experience with wireless synchronization and parameter sensing techniques such as ranging/positioning based on signaling as well as low-power design expertise
• Ideal candidate has a wireless communication systems or digital signal processing background, a passion for building real-world carrier-grade communication systems, and industry experience developing PHY/MAC layer software targeting embedded multicore processors in C/C++
• Experience with Lab test equipment such as channel emulator, spectrum analyzers and Signal and network traffic generators.
• Experience with leading technical initiatives and key deliverables.