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公开(公告)号：EP1589610A4
公开(公告)日：2007-02-14
申请号：EP04700773
申请日：2004-01-08
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： SAWATANI TAKUMA , IIGUSA KYOICHI , TAROMARU MAKOTO , OHIRA TAKASHI , ARAKI KOUJI
CPC classification number: H01Q1/2266 , H01Q1/2275 , H01Q1/242 , H01Q3/44 , H01Q9/30 , H01Q19/32 , H04B7/086
Abstract: An array antenna device (100) includes an excitation element (A0) for receiving a radio signal transmitted, two non-excitation elements (A1, A2), and two variable reactance elements (12-1, 12-2) connected to the non-excitation elements (A1, A2), respectively. By changing the reactance value set in them, the directivity characteristic is changed. In order to obtain a diversity gain above a predetermined value according to the radio signal received, an antenna controller (10) selects and sets one reactance value set according to the signal quality of each radio signal for the two valuable reactance elements (12-1, 12-2) from a first case when a first reactance value set is set and a second case when a second reactance value set is set.
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公开(公告)号：EP1612986A4
公开(公告)日：2006-02-22
申请号：EP04714495
申请日：2004-02-25
Applicant: DOSHISHA , ATR ADVANCED TELECOMM RES INST
Inventor： SASAOKA HIDEICHI , AONO TOMOYUKI , OHIRA TAKASHI
CPC classification number: H04W12/04 , H04L9/0838 , H04L9/0875 , H04L63/0435 , H04L2209/80 , H04M1/72522 , H04W16/24 , H04W16/28
Abstract: A radio communication system (100) comprising radio units (10, 30), an antenna (11), and an array antenna (20). The radio units (10, 30) transmit/receive specified signals through the antenna (11) and the array antenna (20) at the same frequency by a time division duplex (TDD) transmission/reception system, for example, while varying the directivity of the array antenna (20) among a plurality of directivities. The radio units (10, 30) detect the intensity of a plurality of received radio waves and create receiving signal profiles (RSSI1, RSSI2) indicative of a plurality of intensity profiles. The radio units (10, 30) represent the plurality of intensities of the receiving signal profiles (RSSI1, RSSI2) in multi-values and create private keys (Ks1, Ks2) having a bit pattern of the plurality of multi-values.
Abstract translation: 一种包括无线电单元（10,30），天线（11）和阵列天线（20）的无线电通信系统（100）。 例如，无线电单元（10,30）通过时分双工（TDD）发送/接收系统以相同的频率通过天线（11）和阵列天线（20）发送/接收指定信号，同时改变方向性 阵列天线（20）在多个方向之中。 无线电单元（10,30）检测多个接收到的无线电波的强度，并创建指示多个强度分布的接收信号轮廓（RSSI1，RSSI2）。 无线电单元（10,30）以多值表示接收信号轮廓（RSSI1，RSSI2）的多个强度并创建具有多个多值的比特模式的私有密钥（Ks1，Ks2）。
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公开(公告)号：JP2006186584A
公开(公告)日：2006-07-13
申请号：JP2004377084
申请日：2004-12-27
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： EDDY TAILLEFER , OHIRA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide an arrival direction estimating device capable of estimating an arrival direction of an arrival wave regardless of accuracy of switchable directivity. SOLUTION: An array antenna 10 receives L arrival waves by switching its beam pattern into a plurality of beam patterns. A direction estimating means 30 calculates a correlation matrix in which inter-element connection of antenna elements 1-7 is reflected on the basis of a received signal received by the array antenna 10, and also, calculates a received power spectrum of the array antenna 10 on the basis of the calculated correlation matrix and a steering vector of the array antenna 10. The direction estimating means 30 estimates a direction of appearing the peak in the received power spectrum as the arrival direction of the L arrival waves. COPYRIGHT: (C)2006,JPO&NCIPI
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公开(公告)号：JP2003198233A
公开(公告)日：2003-07-11
申请号：JP2001396238
申请日：2001-12-27
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： TEI TAKASHI , HIRATA AKIHITO , OHIRA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To lean to improve performance by each repetition of search, without needing a long learning sequence signal, as compared with the conventional ones. SOLUTION: A method includes steps where an adaptive control type controller 20 randomly perturbs a bias voltage vector V (n), using a bias voltage value V m as one component from a specified initial value by means of a random vector R (n) generated by a random number generator, an objective function value J (n) which is an cross correlation coefficient for the bias voltage vector V (n) before perturbation is compared with an objective function value J (n+1), being a cross-correlation coefficient for the bias voltage vector V (n+1) after perturbation; a bias voltage value V m corresponding to the increase of the cross- correction coefficient before and after perturbation is selected and set and then the vector V (n) is randomly perturbed and set from the selected bias voltage of each of variable capacitance diodes 12-1 to 12-6; and this setting is repeated. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2006186749A
公开(公告)日：2006-07-13
申请号：JP2004379052
申请日：2004-12-28
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： IIGUSA KIYOUICHI , OHIRA TAKASHI , TAROUMARU MAKOTO , YAMAMOTO MAKOTO , SAWATANI TAKUMA
Abstract: PROBLEM TO BE SOLVED: To provide an antenna assembly operable at a plurality of frequencies. SOLUTION: The antenna assembly 10 is provided with a conductor 1, a feed part 2, and an AC power supply 3. The conductor 1 is a dipole made of a columnar conductor. The conductor 1 has a length L approximately equal to λ, and a diameter r approximately equal to λ/50, when the wavelength of an electric wave is represented as λ. The feed part 2 is provided at a position separated only by a distance of about L/3 from one end 1A of the conductor 1. The power supply 3 supplies AC voltage to the feed part 2. COPYRIGHT: (C)2006,JPO&NCIPI
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Patent Agency Ranking
公开(公告)号：JP2004007329A
公开(公告)日：2004-01-08
申请号：JP2002194998
申请日：2002-07-03
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： OHIRA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for adaptively controlling an array antenna so that the major beam is directed in the direction of a desired wave and nulls are directed in directions of a interference wave without requirement of any reference signal. SOLUTION: A transmitted radio signal is an m-phase PSK modulation signal. An adaptive control type controller 20 employs e.g. the maximum grade method being an iterative numerical solution of a nonlinear programming, and calculates and sets a reactance value of variable reactance elements 12-1 to 12-6 so as to direct the major beam of an ESPAR (Electronically Steerable Passive Array Radiator) antenna system 100 in the direction of the desired wave and direct the nulls in the direction of interference by maximizing a value of an objective function (formula 14) expressed by the m's power of the received signal y(t) received by an exciting element A0 of the ESPAR antenna system 100. COPYRIGHT: (C)2004,JPO
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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
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
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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
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.
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公开(公告)号：JP2003258532A
公开(公告)日：2003-09-12
申请号：JP2002051057
申请日：2002-02-27
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： IIGUSA KIYOUICHI , OHIRA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To provide a control method of an ESPAR (Electronically Steerable Passive Array Radiator) antenna that can obtain an excellent converged value capable of obtaining an excellent evaluation function value with the smaller number of repetition times than that of a conventional control method when the major beam of an antenna system is directed to a desired wave and the null pattern is directed to an interference wave. SOLUTION: An adaptive control type controller 20 sequentially perturbs the reactance of each of variable reactance elements 12-1 to 12-6 by a prescribed difference width, calculates a prescribed evaluation function value for each reactance value, and controls to decrease the difference width ΔX and a step width μ depending on an SINR (signal to interference noise power ratio) calculated from the evaluation function value by using a prescribed reduction function indicative of the difference width ΔX when the reactance value of the variable reactance elements 12-1 to 12-6 is repetitively calculated and set in order to direct the major beam of the array antenna system 100 to the direction of the desired wave and the null to the direction of the interference wave so that the evaluation function value is maximized by using the maximum grade method on the basis of the calculated evaluation function value. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003188630A
公开(公告)日：2003-07-04
申请号：JP2001385391
申请日：2001-12-19
Applicant: ATR ADVANCED TELECOMM RES INST
Inventor： HIRATA AKIHITO , TEI TAKASHI , OHIRA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To perform adaptive control so that convergence time is significantly reduced, a main beam is directed to a wanted wave while null is directed to an interference wave with less calculation amount. SOLUTION: An adaptive control type controller 20 halves the range of reactance values which variable reactance elements 12 can take. The correlation factor between a reception signal and a learning sequence signal is calculated when a central value of each range after halving is set. The reactance value of each variable reactance element 12 corresponding to the larger correlation coefficient between two correlation coefficient corresponding to the central values of the ranges after halving is selected as an initial value. Then the range belonging to the selected reactance value is halved, and the correlation coefficient is calculated when the central values of the ranges after halving are set. The reactance value of the variable reactance element 12 corresponding to the larger correlation coefficient between the two correlation coefficient corresponding to the central values of the ranges after halving is selected. The latter process is repeated for adaptive control. COPYRIGHT: (C)2003,JPO
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