The effect of noise on the accuracy of direction finding in the case of the WatsonWatt procedure
Abstract
An investigation is conducted with the objective to obtain a complete solution regarding the effects of the various disturbing factors on the accuracy of the considered directionfinding procedure. The channel parameters are defined and the signal parameters are estimated with the aid of the maximum likelihood principle. The derived estimation functions provide optimum values for the theory and, in addition, indicate an approach for obtaining optimum algorithms for automatic systems. The statistical parameters of the estimated signal parameters are investigated. The CramerRao limit is found to be an important lower limit regarding the observed scattering of the values. The derived probability density for the optimum determined bearing represents theoretically a minimum comparative distribution for testing real systems.
 Publication:

Wissenschaftliche Berichte AEG Telefunken
 Pub Date:
 1977
 Bibcode:
 1977WisBT..50..120B
 Keywords:

 Maximum Likelihood Estimates;
 Radio Direction Finders;
 Radiogoniometers;
 Random Noise;
 Signal To Noise Ratios;
 Antenna Arrays;
 Bearing (Direction);
 Channels (Data Transmission);
 Independent Variables;
 Probability Density Functions;
 Statistical Analysis;
 Communications and Radar