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11.发明授权公开(公告)号：US06922450B2
公开(公告)日：2005-07-26
申请号：US09846390
申请日：2001-05-02
IPC分类号： H01Q3/26 , G01S3/04 , G01S3/14 , G01S3/28 , G01S3/74 , G01S7/02 , H04B1/71 , H04B7/10 , H04B7/26 , H04J13/00 , H04W16/28 , H04W24/00 , H04L27/22 , H03D1/04
摘要： An A/D converter converts the signal received by an array antenna and frequency-converted to a digital signal by a frequency converter. A correlation detector uses the chip rate as a cycle frequency and calculates a cyclic correlation matrix of spread spectrum signals stored in data storage. A cycle frequency detector detects the cycle frequency of an interference signal output from A/D converter. A correlation detector uses the detection result of the cycle frequency detector as a cycle frequency and calculates a cyclic correlation matrix of the signal, which becomes an interference signal, using the signal output from A/D converter. A direction of arrival is estimated, using the cyclic correlation matrices calculated by correlation detector and the correlation detector calculates the respective eigenvalues and eigenvectors and estimates the directions of arrival of a spread spectrum signal and a signal, which becomes an interference signal.
摘要翻译： A / D转换器将由阵列天线接收的信号转换成变频器，并将其频率转换为数字信号。 相关检测器使用码片速率作为周期频率，并计算存储在数据存储器中的扩频信号的循环相关矩阵。 循环频率检测器检测从A / D转换器输出的干扰信号的周期频率。 相关检测器使用周期频率检测器的检测结果作为周期频率，并使用从A / D转换器输出的信号计算成为干扰信号的信号的循环相关矩阵。 使用由相关检测器计算的循环相关矩阵来估计到达方向，并且相关检测器计算各自的特征值和特征向量，并估计扩频信号和成为干扰信号的信号的到达方向。
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公开(公告)号：US06642888B2
公开(公告)日：2003-11-04
申请号：US10020477
申请日：2001-12-12
IPC分类号： G01S502
CPC分类号： G06K9/0057 , G01S3/74
摘要： A radio-wave arrival-direction apparatus calculates a correlation matrix of received signals by correlation calculation between antenna elements, and calculates a noise spatial eigenmatrix, of which each row or column is an eigenvector belonging to a noise eigen-space, by eigenvalue factorization of the correlation matrix. The apparatus also factorizes a matrix including a product of the noise spatial eigenmatrix and a conjugated and transposed matrix of it to an upper or lower triangular matrix, using cholesky factorization. The apparatus calculates an angle evaluation value in a predetermined angle range of an arrival-angle evaluation function using the derived upper or lower triangular matrix, and determines an arrival angle based on the calculation result. A calculation amount in a variable angle range can be thus reduced without causing accuracy degradation of arrival direction, in an algorism requiring an angle sweep for arrival angle estimation of MUSIC method or the like.
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13.发明授权Radio terminal device, radio base station device, radio ranging system, and radio ranging method 有权无线终端设备，无线基站装置，无线电测距系统和无线电测距方法公开(公告)号：US08948236B2
公开(公告)日：2015-02-03
申请号：US13266749
申请日：2010-04-20
CPC分类号： G01S13/767
摘要： Disclosed are a radio terminal device and the like, which achieve an improvement in the accuracy of ranging between a UWB reader and a UWB tag regardless of whether an active method or a semi-passive method. In a terminal (300), a timing control unit (340) outputs, to a transmission amplifier (350), a control signal for performing on-off control such that on the basis of the reception timing of a pulse signal transmitted from a base station (200) and a representative value of a circuit delay time required from when a reception pulse signal is received until a transmission pulse signal generated in response to a detection signal of the reception pulse signal is transmitted, the transmission amplifier (350) amplifies a reradiation pulse generated in response to a detection signal of the pulse signal transmitted from the base station (200); and a re-reradiation pulse generated in response to a detection signal of the reradiation pulse.
摘要翻译： 公开了无线终端装置等，无论是主动方式还是半被动方式，均能够实现UWB读取器与UWB标签之间的测距精度的提高。 在终端（300）中，定时控制单元（340）向发送放大器（350）输出用于执行开 - 关控制的控制信号，以便基于从基站发送的脉冲信号的接收定时 站（200）和从接收脉冲信号接收直到响应于接收脉冲信号的检测信号产生的发送脉冲信号所需的电路延迟时间的代表值，发送放大器（350）放大一个 响应于从基站（200）发送的脉冲信号的检测信号产生的再放射脉冲; 以及响应于所述再辐射脉冲的检测信号而产生的再放射脉冲。
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公开(公告)号：US08605598B2
公开(公告)日：2013-12-10
申请号：US12845252
申请日：2010-07-28
申请人： Takashi Fukagawa
发明人： Takashi Fukagawa
CPC分类号： H04L43/0811 , H04L43/0841 , H04L47/10 , H04L47/34
摘要： The number of data frames transmitted between two apparatuses is counted by a transmission counter, while the number of received frames is counted by a reception counter. When an OAM frame for frame loss measurement is transmitted, the value of the transmission counter is cached in a cache memory. At the time of generation of an OAM frame at an OAM frame generation unit, the value of the cache memory is used so as to generate an OAM frame carrying the value of the transmission counter at the time of transmission of the OAM frame transmitted previously. The frame loss is calculated from the difference of the value of the transmission counter carried in the OAM frame from the previous value and the difference of the value of the reception counter at the time of reception of the previous previous OAM frame from the previous value.
摘要翻译： 通过发送计数器对在两个设备之间发送的数据帧的数量进行计数，而接收到的帧的数量由接收计数器计数。 当发送用于帧丢失测量的OAM帧时，发送计数器的值被缓存在高速缓冲存储器中。 在OAM帧生成单元生成OAM帧时，使用高速缓冲存储器的值，以便在发送先前发送的OAM帧时生成携带发送计数器的值的OAM帧。 从OAM帧中携带的发送计数器的值与先前值的差值以及在先前的OAM帧的接收时的接收计数器的值与先前值的差计算出帧丢失。
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公开(公告)号：US20120213131A1
公开(公告)日：2012-08-23
申请号：US13459884
申请日：2012-04-30
CPC分类号： H04B7/0619 , H04B7/0617 , H04B7/086 , H04B17/11 , H04B17/21
摘要： Wireless communication apparatus adopting a time division duplex system for transmission and reception using plural antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means detects channel information based on reception output of N reception circuits having a one-to-one correspondence with N antennas. Correction value detection means finds a correction value for correcting deviation occurring between each of N transmission circuits and each of the N reception circuits based on the channel information. A wireless communication apparatus transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means of the wireless communication apparatus detects the correction value using the correction signal.
摘要翻译： 采用使用多个天线进行发送和接收的时分双工系统的无线通信装置，使用通信信号检测和校正发送和接收电路之间发生的幅度和相位的偏差。 信道估计装置根据与N个天线一一对应的N个接收电路的接收输出来检测信道信息。 校正值检测装置根据频道信息找到校正发生在N个发送电路和N个接收电路中的每一个之间的偏差的校正值。 无线通信装置向无线通信装置进行通信的基站发送已知的信号（训练信号）。 基站根据已知的信号进行信道估计，生成并发送校正信号（探测信号）。 无线通信装置的校正值检测装置使用校正信号来检测校正值。
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公开(公告)号：US20120014412A1
公开(公告)日：2012-01-19
申请号：US13256878
申请日：2010-03-03
IPC分类号： H04B1/69
CPC分类号： G01S13/878 , G01S5/12 , G01S13/003
摘要： A positioning system and a positioning method which suppress the occurrence of jitter to improve positioning accuracy. A base station (100) of a positioning system (10) which comprises the base station (100) and a radio terminal (200), and measures the position of the radio terminal (200) to be positioned using a pulse signal, wherein a pulse generating block (103) transmits a pulse signal sequence, and an ID positioning block (110) calculates the time required for reciprocation between the transmission timing of the pulse signal sequence and the reception timing of a response pulse signal sequence transmitted from the radio terminal (200) which has received the pulse signal sequence, and calculates the position of the radio terminal (200) on the basis of the time required for reciprocation. Then, in the radio terminal (200) an LNA (203) amplifies the received pulse signal sequence and transmits the amplified pulse signal sequence to the base station (100) as a response pulse signal.
摘要翻译： 一种定位系统和定位方法，其抑制抖动的发生以提高定位精度。 一种定位系统（10）的基站（100），其包括所述基站（100）和无线终端（200），并且使用脉冲信号测量所述无线终端（200）的定位位置，其中， 脉冲发生块（103）发送脉冲信号序列，ID定位块（110）计算脉冲信号序列的发送定时与从无线终端发送的响应脉冲信号序列的接收定时之间的往复所需的时间 （200），其接收到脉冲信号序列，并根据往复所需的时间计算无线终端（200）的位置。 然后，在无线终端（200）中，LNA（203）放大接收的脉冲信号序列，并将放大的脉冲信号序列作为响应脉冲信号发送给基站（100）。
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公开(公告)号：US20110140970A1
公开(公告)日：2011-06-16
申请号：US13059363
申请日：2009-10-09
IPC分类号： G01S5/02
CPC分类号： H04W64/006 , G01S13/765 , G01S2013/466 , H04L27/02 , H04W24/00 , H04W88/08
摘要： Provided are a distance measuring device and a distance measuring method which can easily distinguish a reflected signal from a desired tag from an unnecessary wave so as to improve the distance measuring accuracy even when IR-UWB is used for measuring a distance. The method uses a reader ID indicated by a code string formed by P bits (P is a natural number) for identifying a base station and a tag ID indicated by a code string formed by Q bits (Q is a natural number) for identifying a radio terminal. The method generates a unique word containing P pulses, each of which is ON/OFF-modulated depending on whether each of P bits indicating the reader ID is 1 or 0. The method generates a frame containing 2 M unique words and a burst containing Q frames. The method further outputs a transmission signal containing a plurality of bursts. A radio terminal ASK-modulates the transmission signal depending on whether each of the Q bits indicating the tag ID is 1 or 0. The ASK-modulated signal is sampling-received at timings of different phases by 1/M (M is an integer not smaller than 1) of the transmission clock cycle.
摘要翻译： 提供了一种距离测量装置和距离测量方法，其可以容易地将来自所需标签的反射信号与不需要的波分离，以便即使当使用IR-UWB来测量距离时也能够提高距离测量精度。 该方法使用由用于识别基站的P位（P是自然数）形成的代码串所指示的读取器ID以及由用于识别基站的Q位（Q是自然数）形成的代码串所指示的标签ID 无线电终端。 该方法生成包含P个脉冲的唯一字，每个脉冲根据指示读取器ID的P位中的每一个是1还是0来进行ON / OFF调制。该方法生成包含2M个唯一字和包含Q的突发的帧 框架。 该方法还输出包含多个突发的发送信号。 无线电终端根据指示标签ID的每个Q位是否为1或0来调制发送信号。ASK调制信号在不同相位的定时采样1 / M（M是不整数的整数） 小于1）的传输时钟周期。
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公开(公告)号：US20100120379A1
公开(公告)日：2010-05-13
申请号：US12593572
申请日：2008-03-28
申请人： Takashi Fukagawa , Yoichi Nakagawa , Masato Ukena
发明人： Takashi Fukagawa , Yoichi Nakagawa , Masato Ukena
IPC分类号： H04B1/38
CPC分类号： H01Q1/2266
摘要： Provided is a MIMO communication device which can maintain the MIMO communication characteristic at a certain level regardless of the device installation position. The MIMO communication device (100) includes antenna elements (101-1, 101-2) as a first and a second antenna element which are arranged on a single straight line and an antenna element (102-1) or an antenna element (102-2) as a third antenna element which is arranged out of the straight line. A MIMO modulation unit (105) is connected to all the antenna elements. This assures that there exists a combination of antennas having other than 0 as a matrix expression of a channel estimation matrix in a propagation path between the MIMO communication device (100) and the communication partner regardless of the installation position of the MIMO communication device (100) with respect to a communication partner. As a result, it is possible to realize the MIMO communication device which can maintain the MIMO communication characteristic at a certain level or above regardless of the device installation position.
摘要翻译： 提供了一种MIMO通信设备，其可以将MIMO通信特性保持在一定水平，而与设备安装位置无关。 MIMO通信设备（100）包括布置在单个直线上的天线元件（101-1,101-2）和第一天线元件和第二天线元件，天线元件（102-1）或天线元件（102） -2）作为布置在直线之外的第三天线元件。 MIMO调制单元（105）连接到所有天线元件。 这确保在MIMO通信设备（100）和通信对方之间的传播路径中存在除了0之外的天线的组合作为信道估计矩阵的矩阵表达式，而与MIMO通信设备（100）的安装位置无关 ）相对于沟通伙伴。 结果，无论设备安装位置如何，都可以实现能够将MIMO通信特性保持在一定水平或更高水平的MIMO通信设备。
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公开(公告)号：US20100118745A1
公开(公告)日：2010-05-13
申请号：US12687453
申请日：2010-01-14
IPC分类号： H04J3/00
CPC分类号： H04B7/0619 , H04B7/0617 , H04B7/086 , H04B17/11 , H04B17/21
摘要： In a wireless communication apparatus adopting a time division duplex system for executing transmission and reception using a plurality of antennas, deviation of amplitude and phase occurring between transmission and reception circuits is detected and corrected using a communication signal. Channel estimation means 105 detects channel information based on reception output of reception circuits 104-1 to 104-N provided in a one-to-one correspondence with a plurality of antennas 101-1 to 101-N. Correction value detection means 110 finds a correction value for correcting deviation occurring between each of transmission circuits 103-1 to 103-N and each of the reception circuits 104-1 to 104-N based on the channel information. A wireless communication apparatus 100 transmits an already known signal (training signal) to a base station with which the wireless communication apparatus conducts communications. The base station executes channel estimation based on the already known signal and generates and transmits a correction signal (probe signal). The correction value detection means 110 of the wireless communication apparatus 100 detects the correction value using the correction signal (probe signal).
摘要翻译： 在采用使用多个天线执行发送和接收的时分双工系统的无线通信装置中，使用通信信号来检测和校正发送和接收电路之间发生的振幅和相位的偏差。 信道估计装置105基于与多个天线101-1至101-N一一对应地提供的接收电路104-1至104-N的接收输出来检测信道信息。 修正值检测单元110基于通道信息，求出用于校正发送电路103-1〜103-N和各接收电路104-1〜104-N的偏差的校正值。 无线通信装置100向无线通信装置进行通信的基站发送已知的信号（训练信号）。 基站根据已知的信号进行信道估计，生成并发送校正信号（探测信号）。 无线通信装置100的校正值检测装置110使用校正信号（探测信号）来检测校正值。
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20.发明申请公开(公告)号：US20070217438A1
公开(公告)日：2007-09-20
申请号：US11495549
申请日：2006-07-31
IPC分类号： H04L12/28
CPC分类号： H04L12/437
摘要： A ring node device includes a main Resilient Packet Ring (RPR) card and a queued RPR card. Upon detection of disconnection of a communication link between the main RPR card and an L2/L3 switch, the ring node device exercises control to switch from the main RPR card to the queued RPR card and carries out communication with the L2/L3 switch.
摘要翻译： 环形节点设备包括主弹性分组环（RPR）卡和排队的RPR卡。 在检测到主RPR卡与L2 / L3交换机之间的通信链路断开时，环形节点设备进行控制，从主RPR卡切换到排队的RPR卡，并与L2 / L3交换机进行通信。
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