Location History:
- Moscow, RU (1998)
- Moskva, RU (1998 - 2000)
Company Filing History:
Years Active: 1998-2000
Title: Iouri Trofimov: Innovator in Wireless Communications
Introduction
Iouri Trofimov is a notable inventor based in Moskva, Russia, recognized for his contributions to wireless communications technology. With a total of 5 patents, Trofimov has made significant advancements in carrier recovery and timing synchronization methods in communication systems.
Latest Patents
One of Trofimov's latest patents is focused on carrier recovery in communications systems. This method utilizes a known synchronization word, such as in an IS-54 TDMA system, and operates in two stages to produce an estimate of carrier phase. The first stage involves estimating a complex fading factor that embodies carrier phase information from the synchronization word in the received signal using a least square criterion. The second stage estimates the carrier phase from this complex fading factor through averaging, which can be implemented using various techniques, including Kalman filtering. This innovation provides substantial improvements over traditional phase-locked loop carrier recovery methods.
Another significant patent addresses timing recovery and frame synchronization in cellular TDMA communications systems. This method estimates indirect variables that embody sampling delay information of a linear complex vector using a maximum likelihood criterion. It also describes optimal and sub-optimal procedures for recovering the sampling delay, along with their physical implementations. The timing recovery sampling delay is enhanced by sample spacings determined by the maximum signal amplitudes of multiple samples.
Career Highlights
Throughout his career, Iouri Trofimov has worked with prominent companies in the telecommunications industry, including Northern Telecom Limited and Nortel Networks Corporation. His experience in these organizations has contributed to his expertise in developing innovative communication solutions.
Collaborations
Trofimov has collaborated with notable professionals in the field, including Rui R Wang and Alexandre M Chloma. These collaborations have likely enriched his work and led to further advancements in wireless communication technologies.
Conclusion
Iouri Trofimov's contributions to wireless communications through his patents and career achievements highlight his role as an influential inventor in the field. His innovative methods for carrier recovery and timing synchronization continue to impact the telecommunications industry.