Nonlinear Spectral Analysis and Adaptive Array Superresolution Techniques.
NAVAL RESEARCH LAB WASHINGTON DC
Pagination or Media Count:
Two nonlinear spectral analysis techniques, the Burg maximum entropy method and the maximum likelihood method, are related to their similar nonlinear adaptive array antenna counterparts, which consist of the sidelobe canceller and directional gain constraint techniques. The comparison analysis permits an examination of their principles of operation from the antenna spatial pattern viewpoint, and helps to qualify their superresolution performance. The real-time adaptive resolution of two incoherent sources located within a beamwidth was simulated, and results are presented in the form of a universal superresolution curve over a SNR range of 0 to 40 dB. Two alternative adaptive spatial spectrum estimators are suggested, consisting of a circular array predicting to its center point, and a new thermal noise algorithm. Author
- Electrical and Electronic Equipment
- Theoretical Mathematics