This inventor holds 1 USPTO granted patent. Top assignee: Boeing North American, Inc.. Active years: 1997.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1997
Title: Nai K. Shi and Helicopter Radar Detection
Introduction
Nai K. Shi is an inventor associated with Huntington Beach, California. His patent work addresses radar-based detection and classification of helicopter targets.
Latest Patents
The provided information lists one patent for Shi: “Radar Detection and Classification of Helicopters.” The invention enhances the blade-flash signature in a radar return to detect and classify helicopters. It transforms the radar signal, filters out frequencies associated with direct current and the target body, then processes the remaining signal through inverse transformation, moving averaging, and autocorrelation. Significant autocorrelation peaks can indicate a helicopter, while the time between peaks corresponds to a blade’s rotation period. Peak height helps distinguish the main rotor from the tail rotor. The main-blade period and its ratio to the tail-blade period can then be compared with a database to classify the helicopter. Shi is credited with 1 patent in the information provided.
Career Highlights
Shi’s listed patent reflects work on signal processing for radar target recognition. The provided information associates him with Boeing North American, Inc.
Collaborations
Henry F. Williams is identified as Shi’s coworker. The available information does not specify whether Williams collaborated on the helicopter-detection patent.
Conclusion
Nai K. Shi’s listed invention applies radar signal analysis to identify helicopter blade signatures and support target classification.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile