Birger L Andren

Title: Birger L Andren: Innovator in Digital Signal Synchronization

Introduction

Birger L Andren is a notable inventor based in Handen, Sweden. He has made significant contributions to the field of digital signal processing, particularly in the synchronization of orthogonal diphase coded digital signals. His innovative approach has implications for improving communication systems.

Latest Patents

Birger L Andren holds a patent for a method and apparatus designed for synchronizing orthogonal diphase coded digital signals. The patent describes a system where orthogonal-diphase coded digital signals are transmitted in bursts along a transmission line. To enhance synchronization, an extra pulse is added at the beginning of each burst, with its polarity opposite to that of the subsequent signal element. This extra pulse is detected at the receiver by comparing the received signals with a threshold voltage, allowing for effective synchronization. The threshold voltage is designed to be self-adaptive, decreasing exponentially over time to accommodate varying transmission line lengths. Additionally, to eliminate DC residuals, an extra pulse may also be added at the end of each burst.

Career Highlights

Birger L Andren is associated with Telefonaktiebolaget LM Ericsson (Publ), a leading telecommunications company. His work at Ericsson has allowed him to focus on advancements in digital communication technologies. His innovative solutions have contributed to the efficiency and reliability of data transmission systems.

Collaborations

Birger has collaborated with Lars T Svensson, working together to enhance the capabilities of digital signal processing technologies. Their partnership has fostered innovation within their projects at Ericsson.

Conclusion

Birger L Andren's contributions to the field of digital signal synchronization exemplify the importance of innovation in telecommunications. His patented methods have the potential to significantly improve the performance of communication systems.