公开(公告)号：US07868815B2

公开(公告)日：2011-01-11

申请号：US12486707

申请日：2009-06-17

申请人： Takashi Fukagawa ,  Hirohito Mukai ,  Yoichi Nakagawa ,  Tadao Inoue

发明人： Takashi Fukagawa ,  Hirohito Mukai ,  Yoichi Nakagawa ,  Tadao Inoue

IPC分类号： G01S13/74

CPC分类号： G01S5/0226 ,  G01S11/02 ,  G01S13/76

摘要： A wireless distance measurement system and a wireless distance measurement method that measure the distance between a base station and a terminal without clock synchronization between a plurality of base stations, and without requiring input of the position relationships between a plurality of base stations. Clock phase shift section (210) shifts a clock that is used to generate transmission pulses is phase-shifted by a specific amount every 100 nanoseconds, and A/D conversion section (211) converts a signal re-radiated from terminal (103) to a digital signal using the shifted clock. Correlation calculation section (212) performs correlation calculation between the digital signal and the transmission pulse and creates a delay profile by adding digital signals in the shifted phases between same phases, and incoming wave detection section (213) detects peaks of the pulses in the delay profile. Distance calculation section (214) calculates the distance to terminal (103) based on the timings to transmit the pulses and the timings to detect peaks of the pulses.

摘要翻译： 无线距离测量系统和无线距离测量方法，其测量基站和终端之间的距离，而不需要在多个基站之间的位置关系的输入，而不需要在多个基站之间进行时钟同步。 时钟相移部（210）移位用于产生发送脉冲的时钟每100纳秒相移特定量，A / D转换部（211）将从终端（103）重新发射的信号转换为 使用移位时钟的数字信号。 相关计算部（212）进行数字信号与发送脉冲之间的相关运算，并通过在相位相位之间移动相位相加数字信号来产生延迟分布，而入射波检测部分（213）检测延迟中脉冲的峰值 个人资料 距离计算部（214）基于发送脉冲的定时和检测脉冲峰值的定时，计算与终端（103）的距离。

公开(公告)号：US20100183102A1

公开(公告)日：2010-07-22

申请号：US12667579

申请日：2008-07-03

申请人： Hirohito Mukai ,  Hldekuni Yomo ,  Kiyotaka Kobayashi ,  Yoshinori Kunieda

发明人： Hirohito Mukai ,  Hldekuni Yomo ,  Kiyotaka Kobayashi ,  Yoshinori Kunieda

IPC分类号： H04B1/10 ,  H04L27/06

CPC分类号： H04L1/0048 ,  H04L1/0025 ,  H04L1/005 ,  H04L1/06 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/03006 ,  H04L25/03171

摘要： A radio receiver which performs iterative decoding of a received signal is provided. The radio receiver comprises: a receiving unit receiving a signal on a symbol-by-symbol basis; a demodulation unit (303) demodulating the received signal; a last symbol timing generation unit (308) generating a last symbol timing signal on the basis of the signal demodulated by the demodulation unit (303); a modulation unit (304) modulating the signal demodulated by the demodulation unit (303); and a cancellation unit (306) cancelling an interference component of the received signal using a replica signal generated on the basis of the signal modulated by the modulation unit (304). The modulation unit (304) controls the timing of rearrangement of a data sequence on the basis of the timing of the last symbol. Thus, a radio receiver in which the receiving processing time is reduced can be provided.

摘要翻译： 提供对接收信号执行迭代解码的无线电接收机。 无线电接收机包括：接收单元，以符号为单位接收信号; 解调单元（303），对接收到的信号进行解调; 最后符号定时生成单元，基于由解调单元解调的信号生成最后的符号定时信号; 调制单元（304），调制由解调单元（303）解调的信号; 以及消除单元（306），使用基于由调制单元（304）调制的信号生成的复制信号来消除接收信号的干扰分量。 调制单元（304）基于最后一个符号的定时来控制数据序列的重排的定时。 因此，可以提供其中接收处理时间减少的无线电接收机。

公开(公告)号：US08948236B2

公开(公告)日：2015-02-03

申请号：US13266749

申请日：2010-04-20

申请人： Hirohito Mukai ,  Takashi Fukagawa ,  Yoichi Nakagawa

发明人： Hirohito Mukai ,  Takashi Fukagawa ,  Yoichi Nakagawa

IPC分类号： H04B1/38 ,  H04L27/00 ,  G01S13/76

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。

公开(公告)号：US20120014412A1

公开(公告)日：2012-01-19

申请号：US13256878

申请日：2010-03-03

申请人： Yoichi Nakagawa ,  Takashi Fukagawa ,  Hirohito Mukai

发明人： Yoichi Nakagawa ,  Takashi Fukagawa ,  Hirohito Mukai

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）。

公开(公告)号：US20110140970A1

公开(公告)日：2011-06-16

申请号：US13059363

申请日：2009-10-09

申请人： Takashi Fukagawa ,  Yasunari Kimura ,  Yoichi Nakagawa ,  Hirohito Mukai

发明人： Takashi Fukagawa ,  Yasunari Kimura ,  Yoichi Nakagawa ,  Hirohito Mukai

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。