DR. RANDALL JAMES MOORE, PHARM.D.
Pharmacy in San Diego, CA

4243935, Jan 6, 1981

May 18, 1979

6/040251

John M. McCool - El Cajon CA
Bernard Widrow - Stanford CA
Robert H. Hearn - San Diego CA
James R. Zeidler - San Diego CA
Douglas M. Chabries - Provo UT
Randall H. Moore - San Diego CA

The United States of America as represented by the Secretary of the Navy - Washington DC

G01R 2316

324 77R

An adaptive detector comprises an adaptive linear prediction filter (ALPF) nd a detection processor. The adaptive filter comprises an input filter, adapted to receive an input signal x(k) and delay it by a time. DELTA. An L-point, or L-tap, adaptive filter has an input connected to the output of the input filter, a signal r(k) appearing at the output of the filter. A means for summing has two inputs, one for receiving the signal x(k) and the other for receiving an inverted signal from the adaptive filter, the output of the summer being an error signal. epsilon. (k). A feedback amplifier, whose input is connected to the output of the summer, takes a portion 2. mu. , of the output signal. epsilon. (k) and feeds it back to the adaptive filter, thereby modifying the tap weights of the adaptive filter. The detection processor comprises a circuit, whose input is connected to the output of the adaptive filter, to receive the signal r(k), for performing a K-point discrete Fourier transform (DFT) on the signal r(k).