公开(公告)号：US20120068885A1

公开(公告)日：2012-03-22

申请号：US13375665

申请日：2010-05-27

Applicant: Yoji Goto ,  Katsuo Yamada ,  Naomi Fujisawa ,  Hiraku Nakamura

Inventor： Yoji Goto ,  Katsuo Yamada ,  Naomi Fujisawa ,  Hiraku Nakamura

IPC: G01S19/32

CPC classification number: G01S19/13 ,  G01S19/32

Abstract: To provide an art that can improve a performance of a GNSS receiver. A GNSS receiver 100 includes a receiver 1, a navigation message acquiring unit 3, a navigation message processor 5, and a calculator 6. The receiver 1 receives signals from satellites. The navigation message acquiring unit 3 acquires predetermined information in navigation messages contained in the signals received by the receiver. The navigation message processor 5 outputs either one of the same kind of information in the plural different kinds of navigation messages, which is acquired by the navigation message acquiring unit 3. The calculator 6 performs a calculation based on the information outputted from the navigation message processor 5.

Abstract translation: 提供可以改善GNSS接收机的性能的艺术。 GNSS接收机100包括接收机1，导航消息获取单元3，导航消息处理器5和计算器6.接收机1从卫星接收信号。 导航消息获取单元3获取由接收机接收的信号中包含的导航消息中的预定信息。 导航消息处理器5输出由导航消息获取单元3获取的多种不同类型的导航消息中的相同种类的信息之一。计算器6基于从导航消息处理器输出的信息进行计算 5。

公开(公告)号：US07026982B2

公开(公告)日：2006-04-11

申请号：US10758034

申请日：2004-01-16

Applicant: Hiroyuki Toda ,  Naomi Fujisawa ,  Masaru Fukuda

Inventor： Hiroyuki Toda ,  Naomi Fujisawa ,  Masaru Fukuda

IPC: H04B7/185 ,  G01S5/02

CPC classification number: G01S19/55 ,  G01S19/36 ,  G01S19/44

Abstract: A carrier-phase-based relative positioning device employs a signal processing method which makes it possible to continue estimation of integer ambiguity values even when the number of positioning satellites has changed, determine an integer ambiguity value by efficiently verifying the integer ambiguities in a short time, and calculate a baseline vector. The positioning device includes an integer ambiguity resolving section which determines integer ambiguities of single or double phase differences using a Kalman filter and lambda notation. The Kalman filter is used to calculate estimated values of floating ambiguities and the lambda notation is used to calculate estimated values of the integer ambiguities based on the floating ambiguities. A candidate of a potentially true integer ambiguity that is considered most reliable is determined through various verification processes. When the number of positioning satellites has increased or decreased, or when a reference satellite has been switched, a floating ambiguity after the change in satellite information is estimated from a baseline vector estimated before the change.

公开(公告)号：US06720914B2

公开(公告)日：2004-04-13

申请号：US10321666

申请日：2002-12-18

Applicant: Hiroyuki Toda ,  Naomi Fujisawa ,  Masaru Fukuda

Inventor： Hiroyuki Toda ,  Naomi Fujisawa ,  Masaru Fukuda

IPC: H04B7185

CPC classification number: G01S19/55 ,  G01S19/36 ,  G01S19/44

Abstract: A carrier-phase-based relative positioning device employs a signal processing method which makes it possible to continue estimation of integer ambiguity values even when the number of positioning satellites has changed, determine an integer ambiguity value by efficiently verifying the integer ambiguities in a short time, and calculate a baseline vector. The positioning device includes an integer ambiguity resolving section which determines integer ambiguities of single or double phase differences using a Kalman filter and lambda notation. The Kalman filter is used to calculate estimated values of floating ambiguities and the lambda notation is used to calculate estimated values of the integer ambiguities based on the floating ambiguities. A candidate of a potentially true integer ambiguity that is considered most reliable is determined through various verification processes. When the number of positioning satellites has increased or decreased, or when a reference satellite has been switched, a floating ambiguity after the change in satellite information is estimated from a baseline vector estimated before the change.

Abstract translation: 基于载波相位的相对定位装置采用信号处理方法，即使当定位卫星的数量已经改变时，也可以继续估计整数模糊度值，通过在短时间内有效地验证整数模糊度来确定整数模糊度值 ，并计算基线矢量。 定位装置包括整数模糊度分解部分，其使用卡尔曼滤波器和λ符号确定单相或双相位差的整数模糊度。 卡尔曼滤波器用于计算浮动模糊度的估计值，并且使用lambda符号来计算基于浮点模糊度的整数模糊度的估计值。 通过各种验证过程确定被认为最可靠的潜在真正整数模糊度的候选者。 当定位卫星的数量增加或减少时，或者当参考卫星已经被切换时，卫星信息改变之后的浮动模糊度是从改变之前估计的基线矢量估计出来的。

公开(公告)号：US08922429B2

公开(公告)日：2014-12-30

申请号：US13126434

申请日：2009-10-26

Applicant: Naomi Fujisawa ,  Katsuo Yamada ,  Yoji Goto ,  Hiraku Nakamura

Inventor： Naomi Fujisawa ,  Katsuo Yamada ,  Yoji Goto ,  Hiraku Nakamura

IPC: G01S19/37 ,  G01S19/43 ,  G01S19/32

CPC classification number: G01S19/32 ,  G01S19/43

Abstract: A pseudo range is corrected with high accuracy using a pseudo range correction method that incorporates carrier smoothing. A code pseudo range correction unit (19) performs carrier smoothing of an L1 code pseudo range (PRL1(i)) by the temporal change (ΔADRL1(i)) in an L1 carrier phase, and performs carrier correction of a code ionosphere delay (IPRL1(i)) by the temporal change (ΔIADRL1(i)) in a carrier ionosphere delay. The code pseudo range correction unit (19) performs ionosphere delay correction by subtracting the corrected ionosphere delay (I′L1sm(i)) from the L1 code pseudo range (PRL1sm(i)) after smoothing processing. At this time, a direction of the delay in the temporal change (ΔIADRL1(i)) in the carrier ionosphere delay included in the temporal change (ΔADRL1(i)) in the L1 carrier phase is matched with a direction of the delay in the temporal change (ΔIADRL1(i)) in the carrier ionosphere delay used to calculate the corrected ionosphere delay (I′L1sm(i)).

Abstract translation: 使用包含载波平滑的伪距校正方法，以高精度校正伪距离。 代码伪距校正单元（19）通过L1载波相位中的时间变化（＆Dgr; ADRL1（i））进行L1码伪距离（PRL1（i））的载波平滑化，进行码电离层的载波校正 延迟（IPRL1（i））乘以电离层延迟的时间变化（＆Dgr; IADRL1（i））。 代码伪范围校正单元（19）通过在平滑处理之后从L1代码伪范围（PRL1sm（i））中减去校正的电离层延迟（I'L1sm（i））来执行电离层延迟校正。 此时，包含在L1载波相位的时间变化（＆Dgr; ADRL1（i））中的载波电离层延迟中的时间变化（＆Dgr; IADRL1（i））的延迟的方向与 用于计算校正电离层延迟（I'L1sm（i））的载波电离层延迟中的时间变化（＆Dgr; IADRL1（i））的延迟。

公开(公告)号：US08736489B2

公开(公告)日：2014-05-27

申请号：US13375665

申请日：2010-05-27

Applicant: Yoji Goto ,  Katsuo Yamada ,  Naomi Fujisawa ,  Hiraku Nakamura

Inventor： Yoji Goto ,  Katsuo Yamada ,  Naomi Fujisawa ,  Hiraku Nakamura

IPC: G01S19/32

CPC classification number: G01S19/13 ,  G01S19/32

Abstract: To provide an art that can improve a performance of a GNSS receiver. A GNSS receiver 100 includes a receiver 1, a navigation message acquiring unit 3, a navigation message processor 5, and a calculator 6. The receiver 1 receives signals from satellites. The navigation message acquiring unit 3 acquires predetermined information in navigation messages contained in the signals received by the receiver. The navigation message processor 5 outputs either one of the same kind of information in the plural different kinds of navigation messages, which is acquired by the navigation message acquiring unit 3. The calculator 6 performs a calculation based on the information outputted from the navigation message processor 5.

Abstract translation: 提供可以提高GNSS接收机的性能的艺术。 GNSS接收机100包括接收机1，导航消息获取单元3，导航消息处理器5和计算器6.接收机1从卫星接收信号。 导航消息获取单元3获取由接收机接收的信号中包含的导航消息中的预定信息。 导航消息处理器5输出由导航消息获取单元3获取的多种不同类型的导航消息中的相同种类的信息之一。计算器6基于从导航消息处理器输出的信息进行计算 5。

公开(公告)号：US20110205116A1

公开(公告)日：2011-08-25

申请号：US13126434

申请日：2009-10-26

Applicant: Naomi Fujisawa ,  Katsuo Yamada ,  Yoji Goto ,  Hiraku Nakamura

Inventor： Naomi Fujisawa ,  Katsuo Yamada ,  Yoji Goto ,  Hiraku Nakamura

IPC: G01S19/37

CPC classification number: G01S19/32 ,  G01S19/43

Abstract: A pseudo range is corrected with high accuracy using a pseudo range correction method that incorporates carrier smoothing. A code pseudo range correction unit (19) performs carrier smoothing of an L1 code pseudo range (PRL1(i)) by the temporal change (ΔADRL1(i)) in an L1 carrier phase, and performs carrier correction of a code ionosphere delay (IPRL1(i)) by the temporal change (ΔIADRL1(i)) in a carrier ionosphere delay. The code pseudo range correction unit (19) performs ionosphere delay correction by subtracting the corrected ionosphere delay (I′L1sm(i)) from the L1 code pseudo range (PRL1sm(i)) after smoothing processing. At this time, a direction of the delay in the temporal change (ΔIADRL1(i)) in the carrier ionosphere delay included in the temporal change (ΔADRL1(i)) in the L1 carrier phase is matched with a direction of the delay in the temporal change (ΔIADRL1(i)) in the carrier ionosphere delay used to calculate the corrected ionosphere delay (I′L1sm(i)).

Abstract translation: 使用包含载波平滑的伪距校正方法，以高精度校正伪距离。 代码伪距校正单元（19）通过L1载波相位中的时间变化（＆Dgr; ADRL1（i））进行L1码伪距离（PRL1（i））的载波平滑化，进行码电离层的载波校正 延迟（IPRL1（i））乘以电离层延迟的时间变化（＆Dgr; IADRL1（i））。 代码伪范围校正单元（19）通过在平滑处理之后从L1代码伪范围（PRL1sm（i））中减去校正的电离层延迟（I'L1sm（i））来执行电离层延迟校正。 此时，包含在L1载波相位的时间变化（＆Dgr; ADRL1（i））中的载波电离层延迟中的时间变化（＆Dgr; IADRL1（i））的延迟的方向与 用于计算校正电离层延迟（I'L1sm（i））的载波电离层延迟中的时间变化（＆Dgr; IADRL1（i））的延迟。