Frank W Lehan

Title: Frank W. Lehan: Innovator in Signal Processing and Communication Systems

Introduction

Frank W. Lehan is a notable inventor based in Santa Barbara, California. He has made significant contributions to the fields of signal processing and communication systems. With a total of four patents to his name, Lehan's work has had a lasting impact on technology.

Latest Patents

One of Lehan's latest patents is a signal processing system that includes an apparatus and a related method for generating an estimate of the current state of an information source. This system is based on observed current and previous states of a related signal, as well as estimates of the effects of noise. The apparatus features a state change probability matrix that defines the probabilities of all possible state changes that the source can assume. Additionally, it includes a noise model for generating probabilities indicative of the likelihood that an observed value of the signal would have occurred if the source were in each of its possible states. The circuitry combines these probabilities to provide a probability distribution indicative of the current underlying value of the source.

Another significant patent by Lehan is a method and apparatus for scrambling and unscrambling communication. This invention is designed for subscription television systems where program selections of subscribers are known at a central transmitting site. Control signals encoded into vertical blanking intervals of the video signals are addressed to receivers authorized to receive unscrambled transmissions. This method enhances the security of the system by enabling or disabling the unscrambler based on the control signals decoded at each subscriber's receiver.

Career Highlights

Frank W. Lehan has worked at System Development Inc., where he has been instrumental in developing innovative technologies. His expertise in signal processing and communication systems has positioned him as a key figure in his field.

Collaborations

Lehan has collaborated with notable coworkers, including Albert F. Hartung and Charles T. Barooshian. Their combined efforts have contributed to advancements in technology and innovation.

Conclusion

Frank W. Lehan's contributions to signal processing and communication systems demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing technology and improving communication security.