Title :
A frequency domain time-dependent adaptive filter for interference rejection
Author :
Reed, J.H. ; Quilici, A.A. ; Hsia, T.C.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Davis, CA, USA
Abstract :
The authors examine a type of adaptive filter called a time-dependent adaptive filter (TDAF). A TDAF can effectively deal with the cyclostationary nature of communication signals by changing periodically. It achieves a smaller mean-square error than conventional filter for cyclostationary signals. A frequency-domain TDAF is investigated, and it is shown that it is especially effective for interference rejection applications. Simulation results are presented, showing how cochannel QPSK signals can be separated.<>
Keywords :
filtering and prediction theory; frequency-domain analysis; interference suppression; TDAF; cochannel QPSK signals; cyclostationary nature; frequency domain time-dependent adaptive filter; interference rejection; mean-square error; Adaptive filters; Autocorrelation; Filtering; Frequency domain analysis; Interference; Jamming; Noise shaping; Nonlinear filters; Spread spectrum communication; Statistics;
Conference_Titel :
Military Communications Conference, 1988. MILCOM 88, Conference record. 21st Century Military Communications - What's Possible? 1988 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/MILCOM.1988.13421
