公开(公告)号：JP2003163530A

公开(公告)日：2003-06-06

申请号：JP2001359347

申请日：2001-11-26

Applicant: ATR ADVANCED TELECOMM RES INST

Inventor： SHISHKOV BLAGOVEST ,  OHIRA TAKASHI

IPC: H01Q19/32 ,  H01Q3/44

Abstract: PROBLEM TO BE SOLVED: To eliminate preliminary operation to give data on an incident angle of a receiving signal to an ESPA antenna device, and to perform an adaptive control to direct a main beam to a direction of a desired wave and a null level to an interference potential. SOLUTION: An array antenna device 100 of the ESPA antenna receives a learning sequence signal including the signal transmitted by a communicating party. The adaptive controller 200 in the array antenna generates another learning sequence signal with the same signal pattern as the received one. An estimation function is established for expressing a predetermined difference between the received learning sequence signal and the generated one in the controller 200. The estimation function is developed by means of statistical approximation to obtain variable reactances. Further, a recursive equation is obtained with respect to the variable reactances 12-1 to 12-6 to calculate the reactance value for minimizing the estimation function. Thus, by setting the variable reactance to minimize the estimation function, the array antenna can be controlled to direct the main beam in the direction of the desired wave and the null level in the direction of the interference potential. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003087051A

公开(公告)日：2003-03-20

申请号：JP2001271892

申请日：2001-09-07

Applicant: ATR ADVANCED TELECOMM RES INST

Inventor： SHISHKOV BLAGOVEST ,  OHIRA TAKASHI

IPC: H01Q19/32 ,  H01Q3/44 ,  H01Q9/32 ,  H04B7/08

Abstract: PROBLEM TO BE SOLVED: To adaptively control an espa antenna, so that it way turn a main beam to a desired wave and besides turn null to an interference wave, without the need for giving the arrival angle of a received signal, in the control of the espa antenna. SOLUTION: An adaptive control type of controller 20, for adaptively controlling the array antenna device 100 of the espa antenna being equipped with an excitation element A0 and six nonexcitation elements A1-A6 computes and sets the reactance value xm of each variable reactance element A1-A6 for executing the adaptive control processing, based on the circulation constancy of a spectrum and turning the main beam of the array antenna device 100 in the direction of a desired wave and turning null in the direction of an interference wave, based on the received signal y(n), when having received the sturdy sequence signal contained in a radio signal transmitted from a transmitter on the opposite side, by means of the exciting element A0 of the array antenna device 100 and the sturdy sequence signal d(n) which is the same as the sturdy sequence signal and is generated with a sturdy sequence signal generator 21.