Company Filing History:
5 out of 1,156 
2 out of 79 
1 out of 132 
Years Active: 1993-2019
Title: Innovations of Jean-Francois Helard
Introduction
Jean-Francois Helard is a notable inventor based in Rennes, France. He has made significant contributions to the field of telecommunications, particularly in the area of multi-carrier signal transmission. With a total of 10 patents to his name, Helard's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is focused on peak-to-average power ratio reduction in a multi-carrier signal. This method involves transmitting a multi-carrier source signal that includes symbols made up of reserved carriers and data carriers. The process generates an additional signal that reduces the peak-to-average power ratio of the signal being transmitted. For each symbol, the method obtains M time samples representing the symbols and detects P time samples of the highest amplitude among the M samples. In the frequency domain, it activates a reserved carrier by adding a predetermined power to it. The method also applies a phase shift to the time samples representing the activated reserved carrier based on the detected samples.
Another significant patent by Helard addresses peak-to-average power ratio reduction in a multicarrier signal. This method and apparatus facilitate the multicarrier transmission of a signal representing a source signal. The source signal includes symbols with a set of subcarriers that are transmitted simultaneously. The method modifies the reference value of a subset of pilot subcarriers to minimize the peak-to-average power ratio, ensuring that the correction data takes at least three distinct values.
Career Highlights
Throughout his career, Jean-Francois Helard has worked with prominent companies such as France Telecom and Telediffusion de France. His experience in these organizations has allowed him to develop and refine his innovative ideas in telecommunications.
Collaborations
Helard has collaborated with notable colleagues, including Roselyne Halbert-Lassalle and Bernard Le Floch. These partnerships have contributed to the advancement of his research and inventions.
Conclusion
Jean-Francois Helard's contributions to telecommunications through his innovative patents and collaborations highlight his importance in the field. His work continues to influence the development of multi-carrier signal transmission technologies.
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