外文翻譯---比幅單脈沖雷達(dá)二階判別函數(shù)

1、外文資料原文SECOND ORDER DISCRIMINANT FUNCTION FOR AMPLITUDE COMPARISON MONOPULSEElsayed E. Agrama, Onsy A. Abdel-Alim,and Mohamed A. Ezz-El-ArabFaculty of Engineering,Alexandria University,Alexandria,EgyptA new three receivin

2、g elements amplitude comparison monopulse Direction Finding (DF) technique is introduced. An appropriate second order discriminant function is chosen for this technique. Then, simulation is used to compare its accuracy t

3、o that of the two receiving elements direction finding technique. Different sources of error were taken into consideration, such as, for example, receiver noise, pattern errors, amplitude imbalance, mechanical and quanti

4、zation errors.Introduction and theoryThe term amplitude comparison monopulse direction finding technique is used to calculate the angle of arrival of a radio frequency signa1, usually a radar signa1, at a receiving ant

5、enna array using the output signal amplitudes from TWO adjacent antenna elements. In this technique, the angle of arrival is related to a discriminant function ?which is a first order function in the output signal ampli

6、tude and is given by: ( ) F ?1 11 1( ) ( ) / ( )( ( ) ( )) / ( ( ) ( ))i i i ii i i iF A A A AG G G G?? ? ? ?? ?? ?? ? ?? ? ?where A and A , are the output signal amplitudes from the two receiving adjacent i 1 i?antenn

7、a elements i and i+l respectively, is the field patterns of the above two ( ) G ?antenna elements which are assumed to be identical with pattern beam width but B ?squinted from each other by an angle : ? s20 ( ) exp(

8、(( ) / ) )2.776i s B G G i ? ? ? ? ??? ? ? ??Here we introduce the principle of the second order amplitude comparison monopulse figure 1-b antenna elements field patterns ( ) G ?figure 1-c Discriminant function ( ) F ?