Edward J. Groth
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Principal Electrical Engineer



University of Wichita, BA, Physics, 1942
University of Kansas, MA, Physics, 1944
Carnegie Institute of Technology, Graduate Studies
Studies in Abstract Algebra & Number Theory (Texts examples: Albert & Dickson)



Sigma Xi (Graduate Scientific), Delta Epsilon (Undergraduate Scientific) Invited Lecture at University of Michigan, 1968 & 1969
(Optimum Distortionless Combination Navigation Systems)
Referee for IEEE PG Info Theory, 1973, 1978, 1979 & for Information & Control 1979 (all in field of Algebraic Coding)



1983 - Present: Motorola Inc., Government Electronics Group. Tactical C3I
Section. Development of goal driven Expert Systems. Application of expert system techniques to target identification problems in C3I areas. Use of symbolic languages in constructing expert systems.

1977 - 1983: Systems and Technology Section. Development of a new concept AJ techniques for high data rate, high AJ protection data links. Development of an improved monopulse tracking system. Development of a new data encoding decoding scheme with improved error detection and unambiguous data dock recovery. Research into non binary nonlinear sequence generation of controllable complexity. Wide range of system and coding analytic problems. Development of new concepts for acquiring two way secure data link. Code key distribution procedures. Melding of AJ Security, error correction coding and random interleaving for security against certain types of jamming threats. Mathematical development of non-binary sequence generation in fields and rings. Development of computationally secure non-binary sequence theory. Development of techniques for relayed secure data links. Development of IFF procedures to negate value of equipment capture. Development of source encoding/decoding facilitating data clock recovery. Preliminary development of new spread spectrum AJ techniques.

1965 - 1977: Motorola, GED, Manager of the Engineering Computer Facility. Development and management of the GED computing facility restricted to engineering use only. Selection of equipments and systems software. Development of procedures for a facility with about 600 active users. Managed operations, programming and systems analysis staffs.




1964 -1968: Motorola, GED, Manager of the Preliminary Design and Analysis Group. Wide range of advanced systems problems and projects handled from the analytic side -synthesis optimization, simulation. Small missile active and passive guidance systems. High resolution radar data processing (first digital system). First digital phase locked loops -applied to LF and VLF navigation receivers. Development of computationally secure binary sequence generation methods -aimed at AJ secure systems. Ultra high precision navigation system for testing Air Force inertial systems. Error correction code applications particularly convolutional codes.

1958 -1964: GED, Project Director of Drone Navigation Guidance and Control Project; system design, development and demonstration through extensive field tests and measurements of a system for automatic precision operation of long range Army surveillance drones. System employed AJ secure LF radio links in optimum combination with onboard velocity sensors.

1956 -1958: Motorola, GED, Technical Director of the Jupiter Radio Inertial Guidance System, an AJ secure spread-spectrum, optimum combination radio and inertial IRBM Guidance system (Army Ballistic Missile Agency).

1954 -1956: Armament Division of Universal Match Corp., St. Louis: Manager of Electronic Systems Development. Development of various military electronic systems. Examples -Automatic photo reconnaissance, automatic formation station keeping, small rocket control.

1948 -1954: Missouri Research Laboratories, St. Louis: Physicist. System design of aircraft navigation systems -radar and dead reckoning. System development and demonstration of new concept dual range navigation system.

1946 -1948: Armament Division of Emerson Electronic Co., St. Louis: Physicist. System design of Bomber defense automatic fire control systems.

1945 -1946: Woods Hole Oceanographic Institute, Woods Hole, Mass.: Physicist. Basic underwater sound propagation measurements.

1944 -1945: Manhattan Project, Tennessee-Eastman Corp., Oak Ridge, Tenn.: Physicist. Instrument design and development for radiation survey equipments.








No. 3,150,372--Computing System

No. 3,351,859--Communication System Employing Multi-Path Rejection Means

No. 3,701,018--Acquisition Method for Multiple Transmission Position Location or Navigation System

No. 4,229,741--Two-Way Communication System and Method of Synchronization No. 4,325,129--Non-Linear Logic Module

No. 4,425,666--Data Encoding/Decoding for Three Frequency FSK Modulation

No. 4,494,238--Adaptive Redundant Spread Spectrum Anti-Interference Systems. No. 4, 447, 90'7--Multiple Mixer Spread Spectrum Modulation

No. Pending --Improved Monopulse Tracking System




"Generation of Binary Sequences with Controllable Complexity", IEEE Trans on Info Theory, Vol. 1T-17, No.3, May 1971.





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