苹果Wireless Cellular Standards Engineer
任职要求
Minimum Qualifications • Working knowledge of wireless communication systems (e.g., OFDM/MIMO, etc.). • Proven experience in the algorithm development and implementation design of communication systems or signal processing algorithms, and ability to develop and implement performance tuning strategies and optimizations. • Experience with Matlab or Python and/or C/C++ for algorithm development, modeling, and simulation. • Excellent communication skills to collaborate with cross-functional teams. • Motivated to collaborate and contribute as a team, and able to deliver ambitious tasks in a timely manner. • BS and 3+ years of relevant experience is required. Preferred Qualifications • Ph.D. with a focus on communication systems, signal processing or AI/ML for wireless communication • Knowledge in existing wireless communication protocols, such as 5G/LTE/WCDMA/GSM, 802.11a/b/g/n/ac/ax/be, 802.11ad/ay or Bluetooth/BLE. • Strong understanding of communication theory and relevant algorithm design experience on, including but not limited to, timing recovery, automatic gain control, modulation, channel estimation, equalization, MIMO signal estimation and detection, channel coding and error correction, and beam forming algorithms • Experience in designing systems that operate efficiently in high-load and noisy environments. • Experience on low-power algorithm design for power critical applications. • Experience with multi-radio coexistence management. • Deep understanding of components/modules within wireless communication systems, and the possible impairments from those components, and the corresponding calibration and impairment reduction methods/algorithms, digital pre-distortion, PAPR reduction algorithms, Tx power control, etc. • Experience in modem architecture, microprocessor architecture, hardware and software control.
工作职责
In this role, core responsibilities include, but are not limited to the following: Designing and simulating wireless communication systems for 5G and 6G technologies, including channel coding, advanced MIMO systems, protocols for energy saving, AI/ML for air interface enhancements, sensing techniques, control and data channel optimization for cellular systems. Attending global standards meetings, including 3GPP, to promote Apple product preferences. Collaborate with product teams and come up with novel architecture, protocols, and algorithms to meet the requirements of emerging applications in a challenging radio environment.
In this role, you will be a key member of the Systems Engineering team working on Physical layer control for 3GPP LTE and NR technologies. As a Wireless Systems Engineer, your day-to-day work will involve crafting and optimizing the fundamental control mechanisms that enable high performance cellular communication on Apple product. Your key responsibilities will include: Scope different physical layer control procedures in LTE and NR, identify performance trade-offs, and design innovative control procedures Identify dependencies between physical layer and upper layers to optimize control concepts Participate in cross-feature impact analysis to determine how physical layer procedures impact other systems and strive for jointly optimized algorithms Consider end-user experience and scalability aspects as integral parts of algorithm design Support hardware and software development teams from design through commercialization by defining test procedures and debug methodologies Collaborate with and lead multi-functional teams to deliver solutions that meet Apple's high standards for performance and user experience
Candidate will contribute to a multifaceted software suite based on C/C++. Candidate will develop algorithms and solutions to validate and characterize RF/Wireless system performance. Candidate will develop new features to improve the RF automation testing system. Candidate will build script for the RF test data analyzing and processing. Candidate will analyze results in conjunction with multi-functional teams to identify and root cause issues.
• Execute AI/ML projects, including developing domain-specific chatbots for wireless testing reports (from internal teams and third-party labs), as well as regulatory and standards documents from global authorities. • Research and apply innovative LLM techniques, such as workflow optimization, model architecture design, and prompt engineering, to improve efficiency and accuracy. • Perform data mining, analysis, and predictive modeling using advanced ML approaches to generate actionable insights. • Design, develop, and maintain web applications (front-end and back-end) to support AI/ML tools and data visualization. • Deploy, optimize, and maintain softwares and models in production environments, ensuring scalability, reliability, and performance.
- We expect you contribute to a multi-faceted software suite based on C/C++. - You will be joining the design and validation of RF calibration/testing algorithms. - You will be working on leading wireless standards. - You will be responsible for the design, validation and optimization of RF system level performance. - You will analyze results in conjunction with multi-functional teams to identify and root cause RF issues.