Title :
Narrowband interference suppression in a spread-spectrum system using vector space methods
Author :
Guertin, Ralph F.
Author_Institution :
MITRE Corp., Bedford, MA, USA
Abstract :
The author develops vector-space interference-excision (VSIE) methods that suppress the sidelobes of a sine-wave interferer, in addition to the central lobe, while removing little signal power. THE (threshold excision) and VSIE are applied to synthetic data sets consisting of a binary PN (pseudonoise) sequence in Gaussian background noise and sine-wave interference. Signal-to-noise ratios (SNRs) and bit-error rates are given for four models in which up to 40% of the spectrum exceeds a threshold 7 dB above the average background level. The SNR after VSIE is close to the SNR with no interference present and as much as 8 dB better than the SNR after THE
Keywords :
interference suppression; random noise; spectral analysis; spread spectrum communication; Gaussian background noise; SNR; average background level; binary pseudonoise sequence; bit-error rates; narrowband interference suppression; sine-wave interference; spread-spectrum system; synthetic data sets; threshold excision; vector-space interference-excision; Background noise; Bandwidth; Bit error rate; Brain modeling; Frequency; Interference suppression; Narrowband; Signal to noise ratio; Spread spectrum communication; Wideband;
Conference_Titel :
Military Communications Conference, 1989. MILCOM '89. Conference Record. Bridging the Gap. Interoperability, Survivability, Security., 1989 IEEE
Conference_Location :
Boston, MA
DOI :
10.1109/MILCOM.1989.103979
