Sr. DSP and Wireless Systems Engineer, Amazon Leo Digital RF Systems

Amazon Leo is Amazon’s low Earth orbit satellite network. Our mission is to deliver fast, reliable internet connectivity to customers beyond the reach of existing networks. From individual households to schools, hospitals, businesses, and government agencies, Amazon Leo will serve people and organizations operating in locations without reliable connectivity. About Amazon Leo As a Sr. DSP and Wireless Systems Engineer working in the Digital RF Systems team, you will be responsible for DSP architecture definition, design and simulation of DSP blocks in wireless communication SOCs that are used in Leo phased array systems. You will be implementing end‑to‑end system models including fixed‑point DSP blocks, RF impairments of the radio, phased array antenna and satellite channel. You will be involved in novel techniques to estimate and correct RF impairments that will be implemented in hardware and firmware. Based on the system‑level constraints such as low power and cost, you will develop optimized solutions to support high throughput for our customers. Role Overview As a Sr. DSP Engineer, you will engage with an experienced cross‑disciplinary staff to conceive and design innovative product solutions. You will work closely with internal inter‑disciplinary teams such as ASIC/RFIC designers, firmware/software engineers, and design verification engineers. You will drive key aspects of the silicon design as well as the entire RF line‑up. You will support validation of the silicon in the lab and optimise RF performance via algorithms. Responsibilities Design and model DSP algorithms such as beamforming, MIMO, DPD, CFR, digital cancellation schemes and RF impairment compensation. Model RF transceiver impairments and develop RF impairment compensation algorithms. Collaborate with RTL/RFIC designers, communication systems and software engineers to drive chip and system specifications. Develop and optimise HW/SW calibration algorithms for RF SOC and phased array systems. Architect HW and FW partitioning of calibration algorithms. Develop detailed test plans and test procedures for pre‑silicon, help with design verification as well as post‑silicon validation, integration and characterization of RF wireless SOC performance. Involve in chip bring‑up in the lab and optimise conducted and/or OTA throughput performances by collaboratively working with cross‑functional teams. Qualifications 7+ years of relevant experience in wireless DSP/RF systems engineering (LTE, 5G‑NR, Wi‑Fi 802.11, BLE). In‑depth knowledge of DSP design for low‑power consumption ASIC. Experience with MATLAB, Python and/or C/C++ for fixed‑point DSP algorithm development, modelling and simulation. Solid understanding of OFDM, AGC, beamforming algorithms, MIMO, channel estimation and equalisation techniques. Solid understanding of RF blocks and components. Experience in RF impairment estimation and compensation techniques. Working knowledge of firmware implementation of various DSP algorithms. Experience in using lab equipment, bring‑up and validation of chip. MSEE/PhD is highly preferred with emphasis on digital signal processing and wireless communication systems. Strong background in Communication Theory (signal estimation and detection, AGC, channel estimation), OFDM, MIMO, digital/wireless communication systems and engineering. Extensive experience in designing low‑power/area digital signal processing blocks for wireless RF SOCs. Excellent understanding of RF architectures and blocks used in the wireless SOCs. MATLAB, Python, C++ experience with emphasis on fixed‑point modelling of DSP blocks, RF impairment modelling, RF calibration algorithm development, system performance simulations (EVM, ACRL, OOB emissions). Experience with bit‑accurate modelling to match RTL implementations, emulations and firmware development. Familiarity with phased array systems and phased array performance optimisation techniques. Experience in silicon bring‑up in the lab and using lab equipment such as vector spectrum analyser, signal generators, high‑speed scopes and logic analyzers. Export Control Requirement Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S. as a refugee or granted asylum. Los Angeles County Applicants Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgement, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Equal Opportunity Employer Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status. Inclusive Culture Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner. Compensation Our compensation reflects the cost of labor across several US geographic markets. The base pay for this position ranges from $143,300 per year in our lowest geographic market up to $247,600 per year in our highest geographic market. Pay is based on a number of factors including market location and may vary depending on job‑related knowledge, skills, and experience. Amazon is a total compensation company. Dependent on the position offered, equity, sign‑on payments, and other forms of compensation may be provided as part of a total compensation package, in addition to a full range of medical, financial, and/or other benefits. For more information, please visit https://www.aboutamazon.com/workplace/employee-benefits. This position will remain posted until filled. Applicants should apply via our internal or external career site. #J-18808-Ljbffr