公开(公告)号：US06690921B1

公开(公告)日：2004-02-10

申请号：US09637830

申请日：2000-08-11

申请人： Toshihiro Nagayama ,  Kazuhiko Ikeda ,  Kazuhiko Takeyama ,  Koji Ishii ,  Takayoshi Morino

发明人： Toshihiro Nagayama ,  Kazuhiko Ikeda ,  Kazuhiko Takeyama ,  Koji Ishii ,  Takayoshi Morino

IPC分类号： H04B1700

CPC分类号： H04B17/20

摘要： A gain of a receiving amplifier can be measured by inputting pilot signals each having a different frequency into an input side and an output side of the receiving amplifier respectively, then detecting these pilot signals respectively by a main apparatus having an abnormality detecting function, and then comparing their relative values.

摘要翻译： 可以通过将各自具有不同频率的导频信号分别输入到接收放大器的输入侧和输出侧来测量接收放大器的增益，然后通过具有异常检测功能的主设备分别检测这些导频信号，然后 比较其相对值。

公开(公告)号：US20060202891A1

公开(公告)日：2006-09-14

申请号：US10567066

申请日：2004-08-04

申请人： Takashi Izumi ,  Kazuhiko Takeyama ,  Kazuhiko Ikeda ,  Takashi Enoki ,  Makoto Sasaki

发明人： Takashi Izumi ,  Kazuhiko Takeyama ,  Kazuhiko Ikeda ,  Takashi Enoki ,  Makoto Sasaki

IPC分类号： H01Q3/00

CPC分类号： H04B17/21 ,  H01Q3/267

摘要： An array antenna reception apparatus capable of calibrating a received signal with high accuracy without generating unnecessary radiations at an antenna section even when the power level of the received signal is low. In this apparatus, reference signal generation section (123) operates only when the power level of the received signal captured by antenna section (111) is low and a reference signal is generated. Error calculation section (122) compares information (S3) on the received signal multiplexed with the reference signal with calibration signal (S4) to thereby calculate an error of the received signal produced in the received signal due to signal processing at reception unit (110) and instructs received signal processing section (121) to compensate for the received signal based on the calculated error of the received signal.

摘要翻译： 即使在接收信号的功率电平低的情况下，能够以高精度校准接收信号而不在天线部分产生不必要的辐射的阵列天线接收装置。 在该装置中，参考信号生成部（123）仅在由天线部（111）捕获的接收信号的功率电平为低且产生基准信号的情况下进行动作。 误差计算部（122）将与参考信号复用的接收信号的信息（S 3）与校准信号（S 4）进行比较，从而计算由于接收单元处的信号处理而在接收信号中产生的接收信号的误差 110），并且指示接收信号处理部分（121）基于所计算的接收信号的误差来补偿接收到的信号。

公开(公告)号：US20100183105A1

公开(公告)日：2010-07-22

申请号：US12676134

申请日：2007-09-07

申请人： Kazuhiko Takeyama ,  Takashi Enoki

发明人： Kazuhiko Takeyama ,  Takashi Enoki

IPC分类号： H04L27/00

CPC分类号： H04L27/265 ,  H04L27/2688

摘要： An OFDM receiver (100) has an FFT circuit (107c), an OFDM demodulating section (107) which performs OFDM demodulation for the received OFDM signal, a D/U (Desire to Undesire ratio) measuring section (106a) which measures the D/U in accordance with the OFDM-demodulated signal, a window function processing section (107b) provided at the preceding stage of the FFT circuit (107c), and a selecting section (106b) which switches the factors of the window function processing section (107b) in accordance with the D/U measured by the D/U measuring section (106a). This ensures elimination of interfering waves excellently with relatively simple configuration and low power consumption while suppressing deterioration in the BER due to processing of the window function.

摘要翻译： OFDM接收机（100）具有对所接收的OFDM信号进行OFDM解调的OFDM电路（107c），OFDM解调部（107），测量D的D / U（Desire to Undesire ratio）测量部（106a） 根据OFDM解调信号，设置在FFT电路（107c）的前级的窗口功能处理部（107b），以及切换窗函数处理部（107b）的因子的选择部（106b） 107b）根据由D / U测量部分（106a）测量的D / U。 这确保了相对简单的配置和低功耗消除干扰波，同时抑制由窗口功能的处理引起的BER的恶化。

公开(公告)号：US20120112971A1

公开(公告)日：2012-05-10

申请号：US13380356

申请日：2010-04-28

申请人： Kazuhiko Takeyama ,  Kenji Yanagi ,  Masao Otani

发明人： Kazuhiko Takeyama ,  Kenji Yanagi ,  Masao Otani

IPC分类号： H01Q7/00 ,  H01Q1/24

CPC分类号： H01Q7/04 ,  H01Q1/243

摘要： It is an object to provide an antenna unit capable of operating in response to a plurality of types of counterpart equipment that operate at different resonance frequencies while enhancing its passing characteristic, as well as providing a portable wireless device equipped with the antenna unit. An antenna unit that performs wireless communication originating from induction coupling includes a loop antenna coiled by a conductor in a planar shape; and a metallic plate that is positioned while displaced from the loop antenna in one direction and that partially encloses a circumference of the loop antenna when viewed from the direction, wherein each of ends of the metallic plate overlaps a portion of the loop antenna when viewed from the direction.

摘要翻译： 本发明的目的是提供一种天线单元，其能够响应于以不同谐振频率工作的多种类型的配对设备而工作，同时增强其通过特性，以及提供配备有天线单元的便携式无线设备。 执行从感应耦合发起的无线通信的天线单元包括由平面形状的导体线圈化的环形天线; 以及金属板，其从所述环形天线沿一个方向位移而定位，并且当从所述方向观察时部分地包围所述环形天线的圆周，其中，当从所述方向观察时，所述金属板的每个端部与所述环形天线的一部分重叠 方向。

公开(公告)号：US20120094599A1

公开(公告)日：2012-04-19

申请号：US13380379

申请日：2010-03-04

申请人： Kazuhiko Takeyama

发明人： Kazuhiko Takeyama

IPC分类号： H04B5/00

CPC分类号： H01Q7/00 ,  H01Q1/243 ,  H04B5/0031 ,  H04B5/0081 ,  H04B5/0087

摘要： An antenna unit of the present invention is an antenna unit that performs wireless communication utilizing induction coupling, the unit includes a loop antenna; a communication circuit section that is connected to the loop antenna in order to perform wireless communication utilizing induction coupling; a metallic plate provided outside or inside the loop antenna in a form of a loop by an openable and closable switch; and a detector that detects a receiving level of a wireless signal received by the loop antenna, wherein the communication circuit section controls opening and closing of the switch according to a receiving level of the wireless signal detected by the detector, thereby switching a state of the metallic plate between a closed looped state and an open non-looped state.

摘要翻译： 本发明的天线单元是利用感应耦合进行无线通信的天线单元，该单元包括环形天线; 连接到环形天线的通信电路部分，以便利用感应耦合进行无线通信; 通过可开闭的开关以环形形式设置在环形天线的外侧或内部的金属板; 以及检测器，其检测由所述环形天线接收的无线信号的接收电平，其中所述通信电路部分根据所述检测器检测到的所述无线信号的接收电平来控制所述开关的开闭，从而切换所述 金属板在闭环状态和开放非环状态之间。