Minimise Unwanted Signals from Radar, Wireless Transceivers
Combating Fractional Spurs in Phase Locked Loops to Improve Wireless System Performance in Beyond 5G
Tags: Tokyo Institute of Technology, Japan, Transportation & Automotive, Security & First Responders
Scientists from Tokyo Tech have developed two innovative design techniques to enhance the performance of fractional-N phase locked loops (PLLs), crucial for radar systems and wireless transceivers. By minimizing fractional spurs, these techniques reduce unwanted signals that affect PLLs, improving the reliability of communications in systems like autonomous vehicles and beyond 5G technologies. The first method uses a cascaded-fractional divider to push spurs to higher frequencies, which are naturally filtered out, simplifying the system without requiring digital pre-distortion. The second technique employs a pseudo-differential digital-to-time converter to counteract imperfections and reduce phase noise, enhancing overall PLL performance. These advances promise significant improvements in wireless data transceivers and radar systems, crucial for emerging technologies.
IP Type or Form Factor: Process & Method; Design
TRL: 5 - prototype ready for testing in intended environment
Industry or Tech Area: Automobiles Autonomous; Defense & Security
