Title :
Nonwhite noise/interference rejection via blind adaptive filtering
Author :
Piotrowski, Rafal ; Pawelec, Józef
Author_Institution :
Defence Commun. Inst., Zegrze, Poland
Abstract :
The paper deals with the issue of non-invasive filtering of the non-white narrow-band interference within the spread spectrum signals. This is done in two steps. First, the signal plus interference, as one quantity and the replica, as the separate one-are whitened in parallel due to the power spectrum of the interference. Second the obtained products are processed in accordance with the ML crosscorrelation principle. The simulation rejects the interference down to -20 dB for a signal-to-interference bandwidth ratio B/b≈10. If the interference is not known, the adaptation is engaged
Keywords :
adaptive filters; interference suppression; matched filters; maximum likelihood estimation; radiofrequency interference; signal detection; spread spectrum communication; ML cross-correlation principle; blind adaptive filtering; interference rejection; noninvasive filtering; nonwhite narrow-band interference; power spectrum; signal plus interference; signal-to-interference bandwidth ratio; spread spectrum signals; Adaptive filters; Bandwidth; Electronic mail; Filtration; Integral equations; Interference; Shape; Signal processing; Spread spectrum communication; White noise;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944643
