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)

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)