A failure mechanism in adaptive arrays
Abstract
The steady-state behavior of an adaptive array is considered and the degradation of its output SNR in the presence of jammers is analyzed. It is shown that for given incident powers (of jammers and signal), there are geometric configurations of the sources exciting the array for which the SNR degradation is much more pronounced than for other configurations. This result is proved for the case where the thermal noise power of each array receiver is negligible compared to the total power intercepted by the array from each jammer. The result is general, being valid for an array of n arbitrary antennae in an arbitrary three-dimensional configuration. It is stated in terms of linear dependence relationships among the n-dimensional vectors that describe the effects of the sources on the array.
- Publication:
-
NTC 1981; National Telecommunications Conference, Volume 2
- Pub Date:
- 1981
- Bibcode:
- 1981ntc.....2....7Z
- Keywords:
-
- Adaptive Control;
- Antenna Arrays;
- Antenna Design;
- Antenna Radiation Patterns;
- Failure Analysis;
- Signal To Noise Ratios;
- Noise Intensity;
- Thermal Noise;
- Ultrahigh Frequencies;
- Communications and Radar