Adaptive processing at the subarray level |
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| Institution: | 1. IFIMUP, Physics Department of Science Faculty, Porto University, Porto, Portugal;2. Gleb Wataghin Physics Institute, State University of Campinas (IFGW-UNICAMP), Campinas SP, Brazil;3. Brazilian Center for Research in Physics - CBPF, Rio de Janeiro, Brazil;4. Institute of Physics, Fluminense Federal University, Niteroi-RJ, Brazil;5. CF-UM-UP, Department of Physics, University of Minho, Gualtar Campus, Braga, Portugal;6. European Synchrotron Radiation Facility, Grenoble, France;7. Polytechnic Institute, Rio de Janeiro State University, Nova Friburgo, RJ, Brazil;1. Department of Statistics, Seoul National University, Republic of Korea;2. Risk Consulting, KPMG in Taiwan, Taiwan;3. Department of Applied Mathematics, National Dong Hwa University, Taiwan;1. Department of Mathematical Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea;2. Department of Information Security, Cryptography, and Mathematics, Kookmin University, Seoul, 02707, Republic of Korea |
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| Abstract: | This paper describes a class of partially adaptive arrays with adaptive processing applied to the outputs of steered subarrays. The problem is to detect a signal or estimate its direction of arrival in the presence of jammers. The advantage of applying adaptive processing to subarrays is that it requires much less CPU time than the corresponding fully adaptive processing. The subarray processing equations for the two kinds of problem are described. In this paper, we compare partially adaptive processing performance with fully adaptive processing performance in the case of the following antenna and signal sources: - •- array with regularly spaced sensors ;
- •- between 20 and 100 elements ;
- •- between 3 and 20 subarrays ;
- •- a single jammer ;
- •- desired signal from the antenna zenith.
We suggest a method for determining the optimal subarray configurations in this case. An example is given to show that the performance of an antenna with five subarrays is comparable to that of a fully adaptive thirty-element array for eliminating a single jammer with a target at the zenith. |
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