Title :
Monte Carlo analysis of matched-filter performance after narrowband interference suppression
Author :
Guertin, Ralph ; Johnson, Raymond ; Wamsley, Deborah
Author_Institution :
Mitre Corp., Bedford, MA, USA
fDate :
30 Sep-3 Oct 1990
Abstract :
One technique for suppressing narrowband interference in a pseudonoise (PN) spread-spectrum system prior to matched filtering with the PN sequence is threshold excision (THE), which sets the Fourier amplitudes equal to zero at all fast Fourier Transform (FFT) frequencies at which the spectrum exceeds a given threshold. The threshold dependence of the matched filter signal-to-noise ratio (SNR) obtained after THE, without time-domain weighting of the data and with a raised-cosine window, is analyzed. A Monte Carlo simulation is performed for synthetic data sets consisting of a binary PN signal, white Gaussian background noise, and sinewave interference spread throughout the wide signal band. The results are compared to those obtained from vector space interference excision (VSIE)
Keywords :
Monte Carlo methods; filtering and prediction theory; frequency-domain analysis; interference suppression; matched filters; spread spectrum communication; Monte Carlo analysis; SNR; binary PN signal; frequency domain technique; matched-filter performance; narrowband interference suppression; pseudonoise spread-spectrum system; signal-to-noise ratio; sinewave interference; threshold dependence; threshold excision; white Gaussian background noise; Fast Fourier transforms; Filtering; Frequency; Interference suppression; Matched filters; Monte Carlo methods; Narrowband; Performance analysis; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1990. MILCOM '90, Conference Record, A New Era. 1990 IEEE
Conference_Location :
Monterey, CA
DOI :
10.1109/MILCOM.1990.117594
