TY - GEN
T1 - Adaptive discovery of sparse signals in noise
AU - Haupt, Jarvis
AU - Castro, Rui
AU - Nowak, Robert
PY - 2008
Y1 - 2008
N2 - A multi-step adaptive resampling procedure is proposed, and shown to be an effective approach when detecting high-dimensional sparse signals in noise. Each step of the proposed procedure refines an estimate of the true signal subspace, allowing sensing energy to be focused more directly into the subspace of interest and significantly improving the performance of the final detection test. Large-sample analysis shows that for the sparse signal detection problems considered, the proposed adaptive sensing procedure outperforms the best possible detection methods based on non-adaptive sensing, allowing for the detection of signals that are exponentially weaker than what can be detected using non-adaptive samples.
AB - A multi-step adaptive resampling procedure is proposed, and shown to be an effective approach when detecting high-dimensional sparse signals in noise. Each step of the proposed procedure refines an estimate of the true signal subspace, allowing sensing energy to be focused more directly into the subspace of interest and significantly improving the performance of the final detection test. Large-sample analysis shows that for the sparse signal detection problems considered, the proposed adaptive sensing procedure outperforms the best possible detection methods based on non-adaptive sensing, allowing for the detection of signals that are exponentially weaker than what can be detected using non-adaptive samples.
UR - http://www.scopus.com/inward/record.url?scp=70349655535&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349655535&partnerID=8YFLogxK
U2 - 10.1109/ACSSC.2008.5074721
DO - 10.1109/ACSSC.2008.5074721
M3 - Conference contribution
AN - SCOPUS:70349655535
SN - 9781424429417
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1727
EP - 1731
BT - 2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
T2 - 2008 42nd Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2008
Y2 - 26 October 2008 through 29 October 2008
ER -