Angle measurement in the presence of mainbeam interference
- 1 November 1990
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Aerospace and Electronic Systems Magazine
- Vol. 5 (11), 19-25
- https://doi.org/10.1109/62.63159
Abstract
The problem of reducing interference impinging on an antenna array when the sources lie in the main beam is addressed. Adaptive antenna arrays are incorporated to form adapted sum and difference beams in which the interference signals are suppressed. Monopulse error curves are then obtained, providing the necessary distortion correction curves across the entire mainbeam tracking angle region. New Cramer-Rao (C-R) bounds on the angle estimation error are derived with generalized assumptions on the signal amplitude and phase. The bounds previously derived by others are valid under different conditions. With these generalized assumptions on the signal characteristics, a Monte Carlo simulation is performed, based on the estimation procedure presented, to determine the angle estimation error. These errors are compared with the C-R bounds. Good performance is shown for sufficient S/N/sub 0/ and angular separation between the target and the interference sources.Keywords
This publication has 3 references indexed in Scilit:
- Angle Estimation with Adaptive Arrays in External Noise FieldsIEEE Transactions on Aerospace and Electronic Systems, 1976
- The Effect of Interfering Signals on the Performance of Angle of Arrival EstimatesIEEE Transactions on Aerospace and Electronic Systems, 1974
- Angular accuracy of a phased array radarIEEE Transactions on Antennas and Propagation, 1961