TY - GEN
T1 - Multi-channel signal detection using time-varying estimation techniques
AU - Ghartey, Koj
AU - Cochran, Douglas
AU - Papandreou-Suppappola, Antonia
PY - 2001/1/1
Y1 - 2001/1/1
N2 - We propose to improve the performance of a generalized coherence (GC) detector using noise-suppressed estimates obtained from time varying (TV) techniques. In source detection and localization, the presence of a common but unknown signal must be detected using data from several noisy channels. If one of the channel outputs has a sufficiently high SNR, then it could be pre-processed to improve detector performance. This work uses matching pursuit decomposition (MPD), and instantaneous frequency (IF) estimation to form an estimate of the highest SNR channel output. The signal estimate is then processed by a GC detector or a generalized likelihood ratio test (GLRT) detector to detect the presence of the signal on the remaining, noisier channels. Detector performance is shown to be significantly improved via simulations.
AB - We propose to improve the performance of a generalized coherence (GC) detector using noise-suppressed estimates obtained from time varying (TV) techniques. In source detection and localization, the presence of a common but unknown signal must be detected using data from several noisy channels. If one of the channel outputs has a sufficiently high SNR, then it could be pre-processed to improve detector performance. This work uses matching pursuit decomposition (MPD), and instantaneous frequency (IF) estimation to form an estimate of the highest SNR channel output. The signal estimate is then processed by a GC detector or a generalized likelihood ratio test (GLRT) detector to detect the presence of the signal on the remaining, noisier channels. Detector performance is shown to be significantly improved via simulations.
UR - http://www.scopus.com/inward/record.url?scp=33947138382&partnerID=8YFLogxK
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U2 - 10.1109/ISSPA.2001.950209
DO - 10.1109/ISSPA.2001.950209
M3 - Conference contribution
AN - SCOPUS:33947138382
SN - 0780367030
SN - 9780780367036
T3 - 6th International Symposium on Signal Processing and Its Applications, ISSPA 2001 - Proceedings; 6 Tutorials in Communications, Image Processing and Signal Analysis
SP - 577
EP - 580
BT - 6th International Symposium on Signal Processing and Its Applications, ISSPA 2001 - Proceedings; 6 Tutorials in Communications, Image Processing and Signal Analysis
PB - IEEE Computer Society
T2 - 6th International Symposium on Signal Processing and Its Applications, ISSPA 2001
Y2 - 13 August 2001 through 16 August 2001
ER -