Adaptive heterodyne filters (AHF) for detection and attenuation of narrow band signals. - Karl E. Nelson; Michael A. Soderstrand (ICASSP, 1998)

Full tunable digital heterodyne IIR filters. - Karl E. Nelson; Michael A. Soderstrand (ICASSP, 1999)

Efficient pipelined tunable heterodyne notch filter implementation in FPGAs. - Asad Azam; Dhinesh Sasidaran; Karl E. Nelson; Gary E. Ford; Louis G. Johnson; Michael A. Soderstrand (ISCAS, 2000)

Vision Systems and Software Design for Soccer Playing Mobile Robots. - Karl E. Nelson; Jeffrey W. Collins; Michael A. Soderstrand; Tien C. Hsia (Intell. Autom. Soft Comput., 2000)

FPGA implementation of a tunable band-pass filter using the "basic heterodyne block". - Dhinesh Sasidaran; Asad Azam; Karl E. Nelson; Michael A. Soderstrand (ICASSP, 2001)