Title :
Observability conditions for multiple signal direction finding and array sensor localization
Author :
Lo, James T H ; Marple, Stanley L., Jr.
Author_Institution :
Dept. of Math. & Stat., Maryland Univ., Baltimore, MD, USA
fDate :
11/1/1992 12:00:00 AM
Abstract :
Three observability issues, which arise in narrowband signal direction-finding in the presence of array sensor location errors are described. Necessary and sufficient conditions for the phase delay ambiguity and the rank-2 ambiguity are presented. However, the characterization of the rank-n ambiguity is still an open problem and only a conjecture is given. Barring these ambiguities, the minimal numbers of known and unknown signals required for uniquely localizing the sources and sensors are determined under the assumption of no measurement noises
Keywords :
array signal processing; observability; array processing; array sensor localization; multiple signal direction finding; narrowband signal direction-finding; observability conditions; phase delay ambiguity; rank-2 ambiguity; steering vectors; Delay estimation; Frequency estimation; Narrowband; Noise measurement; Observability; Phase estimation; Phased arrays; Sensor arrays; Sensor phenomena and characterization; Sufficient conditions;
Journal_Title :
Signal Processing, IEEE Transactions on
