TY - JOUR
T1 - On the Number of Signals whose Directions can be Estimated by an Array
AU - Friedlander, Benjamin
AU - Weiss, Anthony J.
PY - 1991/7
Y1 - 1991/7
N2 - We investigate the dependence of direction finding accuracy and sensitivity on the number of signals and their separation. Using the Cramer-Rao lower bound on the direction-of-arrival estimates, we show that accuracy degrades rapidly with the number of signals, if the signals are separated by less than a beamwidth. Using results on the sensitivity of the direction estimates to calibration errors, we show that the sensitivity to calibration errors increases rapidly with the number of signals, if the signals are separated by less than a beamwidth.
AB - We investigate the dependence of direction finding accuracy and sensitivity on the number of signals and their separation. Using the Cramer-Rao lower bound on the direction-of-arrival estimates, we show that accuracy degrades rapidly with the number of signals, if the signals are separated by less than a beamwidth. Using results on the sensitivity of the direction estimates to calibration errors, we show that the sensitivity to calibration errors increases rapidly with the number of signals, if the signals are separated by less than a beamwidth.
UR - http://www.scopus.com/inward/record.url?scp=0026187722&partnerID=8YFLogxK
U2 - 10.1109/78.134409
DO - 10.1109/78.134409
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AN - SCOPUS:0026187722
VL - 39
SP - 1686
EP - 1689
JO - IEEE Transactions on Signal Processing
JF - IEEE Transactions on Signal Processing
SN - 1053-587X
IS - 7
ER -