Maximum Likelihood Elevation Angle Estimates of Radar Targets Using Subapertures

The maximum likelihood estimates of the elevation angles of two closely spaced targets within the beamwidth is considered. For an array divided into three subapertures, a simple, closed form solution is found whose accuracy compares favorably to the maximum likelihood estimate which uses all the individual elements. Simulation results are presented for the case of a radar target located over a smooth reflecting surface.

[1]  Probability Density of the Maximum Likelihood Elevation Estimate of Radar Targets , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[2]  A.J. Berni,et al.  Angle-of-Arrival Estimation Using an Adaptive Antenna Array , 1975, IEEE Transactions on Aerospace and Electronic Systems.

[3]  G. W. Lank,et al.  Angular Tracking of Two Closely Spaced Radar Targets , 1968, IEEE Transactions on Aerospace and Electronic Systems.

[4]  S.S. Reddi,et al.  Multiple Source Location-A Digital Approach , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[5]  Robert B. McGhee,et al.  A Decision Theoretic Approach to the Angular Resolution and Parameter Estimation Problem for Multiple Targets , 1968, IEEE Transactions on Aerospace and Electronic Systems.

[6]  W.B. Gordon,et al.  Bounds on Elevation Error Estimates of a Target in Multipath , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[7]  Peyton Z. Peebles.  Multipath Angle Error Reduction Using Multiple-Target Methods , 1971, IEEE Transactions on Aerospace and Electronic Systems.

[8]  W. Gordon,et al.  A New Solution to the Problem of Vertical Angle-of-Arrival of Radio Waves , 1949 .

[9]  W.D. White,et al.  Low-Angle Radar Tracking in the Presence of Multipath , 1974, IEEE Transactions on Aerospace and Electronic Systems.

[10]  Warren White,et al.  Angular Spectra in Radar Applications , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[11]  Peyton Z. Peebles,et al.  Multiple-Target Monopulse Radar Processing Techniques , 1968, IEEE Transactions on Aerospace and Electronic Systems.

[12]  D. K. Barton.  Low-angle radar tracking , 1974 .

[13]  Stephen W. Lang.  Near optimal frequency/Angle of arrival estimates based on maximum entropy spectral techniques , 1980, ICASSP.

[14]  D.K. Bartonllow.  Multipath Fluctuation Effects in Track-While-Scan Radar , 1979, IEEE Transactions on Aerospace and Electronic Systems.