Chi-Yung Chang

Title: Innovations of Chi-Yung Chang

Introduction

Chi-Yung Chang is an accomplished inventor based in Torrance, CA. He holds 2 patents that contribute significantly to the fields of radar, lidar, and acoustic systems. His work focuses on resolving ambiguities that can affect geolocation and image quality performance.

Latest Patents

One of his latest patents is titled "System and method for resolving ambiguity in radar, lidar, and acoustic systems." This invention addresses the common range and Doppler ambiguities found in these systems. The method described iteratively resolves these ambiguities to enhance performance. For Doppler ambiguity applications, a first Pulse Repetition Frequency (PRF) value and an initial Doppler frequency search window are selected. A new PRF is determined based on the ratio of the initial search window to the first PRF. The radar data from the first pair of PRFs is utilized to determine two modulo Doppler estimates. These estimates are then used to derive a new Doppler estimate with a smaller confidence interval than the initial search window. The process continues iteratively until the new Doppler search window is less than the first PRF.

Another significant patent is "Pipeline synthetic aperture radar data compression utilizing systolic." This invention discloses a system for data compression that employs systolic array architecture for Vector Quantization (VQ). It covers both full-searched and tree-searched VQ methods. A special case of a Binary Tree-Search VQ (BTSVQ) is also presented, featuring identical Processing Elements (PE) in the array for both Raw-Codebook VQ (RCVQ) and Difference-Codebook VQ (DCVQ) algorithms. Additionally, a fault-tolerant system is introduced, allowing a faulty PE to be bypassed and replaced by a spare at the end of the array, with codebook memory assignment adjusted accordingly.

Career Highlights

Chi-Yung Chang has worked with notable organizations, including the United States of America as represented by the Administrator and Raytheon Company. His contributions to these companies have been instrumental in advancing technology in his field.

Collaborations

Throughout his career, he has collaborated with esteemed colleagues such as Wai-Chi Fang and John C Curlander. Their joint efforts have further enriched the innovations in radar and acoustic systems.

Conclusion

Chi-Yung Chang's