Principal RF Simulations Engineer
US-CO-Littleton
Attract-careers1
Req #: 92552
Type: Fulltime-Regular
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Overview: Our Wireless Technology team is transforming the future of connectivity by building and enhancing the country's first virtualized, standalone 5G wireless network from scratch. Our network is free of the limitations of the past, and flexible to satisfy all the social, economic and transformative needs of the changing world. Responsibilities: Candidates must be willing to participate in at least one in-person interview, which may include a live whiteboarding or technical assessment session. We are seeking an RF Simulations Expert with a strong background in Radio Access Networks (RAN) and Non-Terrestrial Networks (NTN) to support the design, modeling, and optimization of next-generation wireless communication systems. The ideal candidate will develop and perform RF simulations for integrated terrestrial and satellite networks, ensuring optimal connectivity, spectral efficiency, and system performance. Key Responsibilities: * Develop RF simulation models for RAN and NTN using tools like MATLAB, STK, HFSS, and CST; perform link budget and interference analysis. * Simulate RF propagation, Doppler effects, antenna patterns, and channel modeling for terrestrial and satellite environments. * Evaluate air interface performance, beamforming, and waveform design for integrated RAN-NTN systems. * Optimize handovers, mobility, and spectrum sharing while addressing latency, delay, and sync challenges in hybrid deployments. * Support 5G/6G NTN evolution in line with 3GPP Release 17+ and regulatory requirements; explore AI/ML for RF optimization. * Collaborate across teams and deliver technical reports, white papers, and presentations on findings and design recommendations. Qualifications: Education and Experience: * Master's or Ph.D. in Electrical Engineering, Telecommunications, or related field with 10+ years in RF simulation and system modeling. * Deep understanding of RF propagation, antenna design, and wireless communication principles for RAN and NTN networks. * Proficient in simulation tools like MATLAB, STK, HFSS, CST, and experienced with link budget and performance analysis. * Strong knowledge of 3GPP RAN/NTN standards, including beamforming, waveform design, and adaptive modulation. * Hands-on experience with LEO/MEO/GEO satellites, HAPS, and hybrid terrestrial-satellite architectures. * Skilled in Python, C++, or MATLAB scripting with strong analytical, problem-solving, and technical communication abilities. Skills and Qualifications: * Experience with developing AI/ML applications to improve RAN performance * Knowledge of SDR-based implementations, phased array antenna systems, and spectrum management * Understanding of 5G O-RAN and NTN integration strategies * Hands-on experience in RAN optimization, interference mitigation, and network planning
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