Ludwig Schwoerer

Title: Ludwig Schwoerer: Innovator in OFDM Signal Processing

Introduction

Ludwig Schwoerer is a notable inventor based in Hattingen, Germany. He has made significant contributions to the field of signal processing, particularly in Orthogonal Frequency Division Multiplexing (OFDM) technology. With a total of 5 patents to his name, Schwoerer continues to push the boundaries of innovation in telecommunications.

Latest Patents

One of Schwoerer's latest patents is focused on FFT carrier frequency offset estimation for OFDM signals. This invention discloses an OFDM signal receiver designed to detect carrier frequency offset. The receiver processes the FFT transform of the signal, utilizing an estimator that applies the spectrum shape of the FFT transform to estimate the carrier frequency offset effectively.

Another significant patent involves frequency-dependent phase rotation prior to mapping in an OFDM transmitter. In this invention, an input bit stream undergoes phase rotation by reversing bit pairs and inverting bits. The manipulated bit stream is then mapped to a symbol, which is converted to the time domain. This process results in an output of the time domain conversion that consists of an ordered set of N samples, allowing for efficient cyclic prefix insertion without rotation at the symbol level. A portion of the sample set is stored in a buffer, and the complete set is output, followed by the buffered portion for transmission. This innovative approach reduces CP-related processing delays significantly.

Career Highlights

Ludwig Schwoerer is currently employed at Nokia Corporation, where he continues to develop cutting-edge technologies in telecommunications. His work has been instrumental in advancing OFDM signal processing techniques, which are crucial for modern communication systems.

Collaborations

Throughout his career, Schwoerer has collaborated with notable colleagues, including Andre Kaufmann and Ernst Zielinski. These collaborations have further enriched his contributions to the field.

Conclusion

Ludwig Schwoerer is a prominent figure in the realm of signal processing, with a focus on OFDM technology. His innovative patents and ongoing work at Nokia Corporation highlight his commitment to advancing telecommunications. His contributions are paving the way for future developments in the industry.