Analyzing SNR Degradation Due to Jitter in Practical Direct RF Sampling Systems

Abstract

This research demonstrates that the jitter requirements for direct RF sampling systems and traditional direct conversion receivers are equivalent. Our results contradict the belief that sophisticated clocks, are necessary. Practical, everyday clocks similar to those used in direct conversion receiver systems are sufficient to ensure signal fidelity in 5G NR OFDM systems using direct RF sampling. This discovery streamlines the implementation of direct RF sampling systems, increasing their practicality and cost-effectiveness without sacrificing performance. Additionally, our study showcases the effortless application of the complete phase noise related research done in the past to direct RF sampling systems, encompassing inter-carrier interference effects, phase tracking systems, and phase noise compensation algorithms. This equivalence expands upon the existing knowledge base. From direct conversion systems to the direct RF domain, this provides a consistent and robust theoretical framework for understanding and mitigating phase noise effects in communication systems. This unified approach streamlines the development process, allowing engineers to work more efficiently. Researchers can use existing methodologies and solutions to address phase noise challenges in direct RF sampling systems. These findings contribute to the advancement and practical adoption of direct RF sampling in 5G NR OFDM and other communication systems, promoting efficiency and reliability in today’s communication technologies.