A method minimizing the correlation properties of a noise field and improving detection of signals embedded in anisotropic noise

Stergiopoulos, S; Munn, DR; Nikitakos, N

dc.contributor.author	Stergiopoulos, S	en
dc.contributor.author	Munn, DR	en
dc.contributor.author	Nikitakos, N	en
dc.date.accessioned	2014-03-01T01:13:31Z
dc.date.available	2014-03-01T01:13:31Z
dc.date.issued	1998	en
dc.identifier.issn	0364-9059	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12536
dc.subject	Beamforming	en
dc.subject	Correlated noise field	en
dc.subject	Overlap correlator	en
dc.subject	Spatial and temporal coherence of medium	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Ocean	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Oceanography	en
dc.subject.other	Computational methods	en
dc.subject.other	Radar systems	en
dc.subject.other	Sensors	en
dc.subject.other	Signal to noise ratio	en
dc.subject.other	Sonar	en
dc.subject.other	Beamforming	en
dc.subject.other	Correlated noise field	en
dc.subject.other	Acoustic signal processing	en
dc.title	A method minimizing the correlation properties of a noise field and improving detection of signals embedded in anisotropic noise	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/48.664090	en
heal.identifier.secondary	http://dx.doi.org/10.1109/48.664090	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	This paper deals with the development of a processing technique that improves the signal-to-noise ratio (SNR) at the single sensor for a received signal that is embedded in a partially correlated noise field. The approach of this study is unique in that the noise is treated as being non-white and partially correlated. The concept of the proposed development is based on the time interval over which the temporal coherence or correlation properties of a noise field are defined. For narrow-band signals, the associated temporal coherence period is much longer than the correlation time interval of the anisotropic noise field. Thus, a coherent integration of discontinuous segments of received signals will enhance the SNR at the single sensor by lowering the correlation properties of the associated non-white noise. Reconstruction of the narrow-band signal time series with improved SNR at the sensor will allow the use of the existing high-resolution techniques to be utilized more effectively by lowering their threshold values in order to detect very weak signals. The intention here is to integrate the characteristics of the real anisotropic noise field during the preliminary processing stages of the received signals by an array of sensors. Simulations show that the proposed method can be integrated in the signal processing functionality of sonar and radar systems.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Journal of Oceanic Engineering	en
dc.identifier.doi	10.1109/48.664090	en
dc.identifier.isi	ISI:000073146900003	en
dc.identifier.volume	23	en
dc.identifier.issue	2	en
dc.identifier.spage	105	en
dc.identifier.epage	117	en