LI Gen-wang

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About

Dr. Li Gen-wang is a leading researcher in ultrasonic sensing and mobile robotics, whose work has fundamentally advanced the reliability and speed of sonar systems. His primary research focuses on eliminating ultrasonic crosstalk—a critical problem that causes false distance measurements and hampers the efficiency of autonomous navigation. Dr. Li’s major contributions lie in developing novel signal modulation techniques to enable real-time, non-interfering sonar operation. In his highly cited 2009 paper (29 citations), he pioneered the use of short, optimized pulse-position modulation (PPM) sequences, dramatically reducing crosstalk while enhancing system responsiveness. His earlier 2008 work (26 citations) introduced chaotic pulse position-width modulation (CPPWM), a sophisticated approach that further optimized excitation signals for robust, high-speed ranging. Together, these innovations have provided a practical, efficient solution for deploying multiple sonar sensors simultaneously in mobile robots, directly improving obstacle avoidance and mapping capabilities. Dr. Li’s research is notable for its direct impact on real-world robotic systems, offering engineers a proven methodology to overcome one of the field’s most persistent hardware challenges. His work remains essential reading for anyone developing advanced, multi-sensor perception systems.