Markku Renfors

Title: Markku Renfors: Innovator in Communication Technology

Introduction

Markku Renfors is a notable inventor based in Tampere, Finland. He has made significant contributions to the field of communication technology, particularly in the areas of modulation methods and phase noise compensation. With a total of 6 patents to his name, Renfors has demonstrated a commitment to advancing the efficiency and reliability of communication systems.

Latest Patents

One of Renfors' latest patents is a modulation method for power-efficient transmissions. This invention discloses a solution for modulating and demodulating signals transferred over a communication channel. The method involves storing a database for mapping rules that convert a block of N bits into M modulation symbol phase transitions. The phase transition between consecutive modulation symbols is limited to less than or equal to ∓π/2, ensuring that M is smaller than N. This innovative approach allows for the realization of 2N different phase-transition combinations. The process includes determining an initial phase, acquiring a block of N bits, and modulating these bits into M phase symbol transitions, ultimately leading to the transmission of a multi-carrier symbol over a radio interface.

Another significant patent by Renfors is an apparatus and method for compensating phase noise. This method involves receiving a symbol that comprises one or more data sub-symbols and pilot sub-symbols. A sequence of first phase noise estimates is obtained based on the pilot sub-symbols. A first filter is then used to derive a first sequence of filtered phase noise estimates from the data sub-symbols. This sequence is stored, and phase noise compensation is applied to the data sub-symbols based on the filtered estimates, enhancing the overall signal quality.

Career Highlights

Throughout his career, Markku Renfors has worked with prominent companies in the telecommunications industry, including Nokia Technologies Oy and Nokia Corporation. His experience in these organizations has allowed him to contribute to groundbreaking advancements in communication technologies.

Collaborations

Renfors has collaborated with notable colleagues such as Toni Aleksi Levanen and Juha Yli-Kaakinen. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Markku Renfors is a distinguished inventor whose work in communication technology has led to significant advancements in modulation methods and phase noise compensation. His contributions continue to influence the field and enhance the efficiency