Ronald McCallister is a notable inventor based in Fairfax Station, VA (US). He has made significant contributions to the field of signal processing, particularly in the area of Doppler tracking. With a total of 2 patents to his name, McCallister's work has implications for positioning, navigation, and timing services.

Latest Patents

McCallister's latest patents focus on Doppler tracking for signals of opportunity using rate-line detection. The first patent describes a receiver that captures an electromagnetic transmission carrying a bauded signal, such as one from an orbiting satellite. This transmission is processed for Doppler shift analysis. A non-linear operation is performed to expose a cyclostationary feature of the captured transmission, defining a rate-line. This rate-line exists at a frequency related to the bauded signal and the Doppler shift relative to the motion of the transmitter to the receiver. The rate-line frequency is tracked over time to generate data indicative of the Doppler shift associated with the satellite, which is then processed by an estimator to supply positioning, navigation, and timing services at the receiver output.

The second patent also deals with Doppler tracking for signals of opportunity using rate-line detection. It involves capturing an electromagnetic transmission carrying a bauded signal and processing it for Doppler shift analysis. Similar to the first patent, a non-linear operation is performed to expose a cyclostationary feature that defines a rate-line frequency. This frequency is tracked in time to generate data indicative of the Doppler shift associated with the satellite, which is supplied to a tracking receiver.

Career Highlights

McCallister is currently employed at General Dynamics Mission Systems, Inc., where he continues to innovate in the field of signal processing. His work has been instrumental in advancing technologies that enhance navigation and communication systems.

Collaborations

Some of McCallister's coworkers include Bruce Cochran and Steven Goisman, who contribute to the collaborative environment that fosters innovation at General Dynamics Mission Systems, Inc.

Conclusion

Ronald McCallister's contributions to Doppler tracking and signal processing demonstrate his commitment to advancing technology in critical areas. His patents reflect a deep understanding of electromagnetic transmissions and their applications in modern navigation systems.

Profile summary based on public USPTO records.

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