Location History:
- Joinville, FR (1986)
- Bois-Colombes, FR (1987)
- Joinville Le Pont, FR (1987)
Company Filing History:
Years Active: 1986-1987
Title: Lydie Desperben: Innovator in Digital Transmission Systems
Introduction
Lydie Desperben is a notable inventor based in Joinville, France. She has made significant contributions to the field of digital transmission systems, holding three patents that showcase her innovative spirit and technical expertise.
Latest Patents
One of her latest patents is a circuit for recovering the carrier wave in digital transmission systems. This circuit is designed to recover the carrier of a digitally modulated wave with a phase symmetry of 2.pi./M, where M represents the order of the symmetry. The invention includes means for automatic and fast acquisition, utilizing a voltage-controlled oscillator that adjusts its phase to align with the digital modulated wave. The circuit features two channels, one in phase and the other in quadrature with the carrier, each containing a demodulator, low-pass filter, and reconstruction means. The quadrature channel also includes a 90-degree phase shifter. The phase comparator arrangement in the circuit selects received signal points and generates a variable-rate sampling clock, enhancing the efficiency of digital data reception.
Another significant patent involves an arrangement for receiving digital data that adapts to channel variations in a transmission system. This adaptive receiver stage includes an adaptive equalizer and at least one sampler, producing complex samples from the input signal. A decision circuit supplies detected complex samples, while an adaptive timing recovery circuit determines the optimal sampling instant by minimizing a quadratic function that represents the difference between the complex samples.
Career Highlights
Lydie Desperben has built a successful career at U.S. Philips Corporation, where she has been instrumental in advancing technologies related to digital communications. Her work has not only contributed to the company's innovations but has also positioned her as a leader in her field.
Collaborations
Throughout her career, Lydie has collaborated with talented individuals such as Hikmet Sari and Said Moridi. These collaborations have fostered an environment of creativity and innovation, leading to the development of groundbreaking technologies.
Conclusion
Lydie Desperben's contributions to digital transmission systems exemplify her dedication to innovation and excellence. Her patents reflect her ability to solve complex problems and enhance communication technologies. She continues to inspire future generations of inventors and engineers.