Bridgewater, NJ, United States of America

Sheng-Jen Tsai

This inventor holds 6 USPTO granted patents. Top assignees: Lucent Technologies Inc., Agere Systems Inc.. Active years: 2002-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sheng-Jen Tsai. Retrieved from https://idiyas.com/inventor/sheng-jen-tsai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 5

Forward Citations = 204(Granted Patents)

Company Filing History:

5 out of 9,364

Lucent Technologies Inc.

Years Active: 2002-2003

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6665356 - Sample timing control for demodulation of phase-modulated signals (2003-12-16),

2. 6590945 - Method and apparatus for frequency offset compensation (2003-07-08),

3. 6567486 - Apparatus and method for finding location of a mobile unit (2003-05-20),

4. 6567480 - Method and apparatus for sampling timing adjustment and frequency offset compensation (2003-05-20),

5. 6535733 - Measurement radio system for producing operating information for traffic radios (2003-03-18),

6. 6493539 - Providing an accurate timing source for locating the geographical position of a mobile (2002-12-10),

Title: The Innovations of Sheng-Jen Tsai

Introduction

Sheng-Jen Tsai is a notable inventor based in Bridgewater, NJ (US). He has made significant contributions to the field of wireless communication, holding a total of 6 patents. His work focuses on improving the efficiency and accuracy of signal processing techniques.

Latest Patents

One of his latest patents is titled "Sample timing control for demodulation of phase-modulated signals." This invention addresses the demodulation of phase-modulated signals, such as quadrature phase-shift-keyed (QPSK) signals, in wireless communication systems. The method involves separating the phase-modulated signal into two portions, where one is phase demodulated to generate symbols, and the other is frequency demodulated to measure the instantaneous frequency. This process helps in establishing sample timing for proper symbol sampling.

Another significant patent is the "Method and apparatus for frequency offset compensation." This invention provides a simplified method for estimating frequency offset in a TDMA cellular PCS environment using π/4-shifted DQPSK. The method includes multiplying a complex conjugate of a received symbol with a succeeding symbol to create a comparison vector. The angle of this vector is then adjusted to estimate the frequency offset accurately.

Career Highlights

Sheng-Jen Tsai has worked with prominent companies in the technology sector, including Lucent Technologies Inc. and Agere Systems Inc. His experience in these organizations has contributed to his expertise in wireless communication technologies.

Collaborations

Throughout his career, Tsai has collaborated with talented individuals such as Alex Matusevich and Mohsen Sarraf. These collaborations have likely enriched his work and led to innovative solutions in the field.

Conclusion

Sheng-Jen Tsai's contributions to wireless communication through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative approaches continue to influence advancements in signal processing techniques.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]