As a system baseband engineer you have two main responsibilities.
Your first responsibility one is to own the modem reference simulation. This simulation is used as reference model for the software (DSP, PHY) implementation, capturing the modem algorithm requirements on one hand, and the software implementation on the other. Hence, the simulation, written in C or Matlab, is the core tool used among the PHY teams. You are developing and maintaining the simulation, developing the fixed point model, analyzing and comparing the simulation model performance to the floating point algorithm and testing the implementation to make sure it is bit-exact and meets the performance targets.
Your second task is to verify the modem implementation (by software and hardware) and make sure it meets the performance criteria set by the Algorithms and System teams. This involves defining and ramping-up the baseband tests in lab, developing automation environment, debugging and analysis tools, supporting the firmware teams etc. In this position you are leveraging legacy infrastructure, however it is expected that you evolve, grow and adapt it substantially to the new cellular technology and platform. You are playing a key role in analyzing the modem performance in the field, driving field trials goals, identifying and debugging performance issues.
In both roles, you are leveraging your large experience in wireless modem design and testing, DSP expertise, working with various bit-exact tools and techniques. You are also utilizing your hands-on experience working in the lab, operating eNodeB simulators and signaling and non-signaling test equipment. You are closely co-working with the baseband Algorithm and Research, DSP and PHY firmware and field trial teams.