公开(公告)号：US20090224973A1

公开(公告)日：2009-09-10

申请号：US12045047

申请日：2008-03-10

Applicant: Jasbir Singh Nayyar

Inventor： Jasbir Singh Nayyar

IPC: G01S1/00

CPC classification number: H04B1/7075 ,  G01S19/29 ,  G01S19/30 ,  G01S19/37 ,  H04B1/709 ,  H04B2201/70715

Abstract: According to an aspect of the present invention, each correlation block in a Global Navigation Satellite System (GNSS) receiver is designed to examine a certain number of consecutive samples of an input signal and a buffer is designed to store more than such number of samples. Due to such storing, each correlator may perform multiple correlations for the same set of received samples. According to another aspect, such searches may be performed without rotating a local code by controlling the specific samples provided as window samples. Thus, while performing Doppler searches, different frequencies can be searched using the same local code without rotation. While performing code phase searches, the window samples may start from different positions with the position determining the specific phase being searched.

Abstract translation: 根据本发明的一个方面，全球导航卫星系统（GNSS）接收机中的每个相关块被设计为检查输入信号的一定数量的连续样本，并且缓冲器被设计为存储超过这样数量的样本。 由于这样的存储，每个相关器可以对同一组接收样本执行多个相关。 根据另一方面，可以通过控制作为窗口样本提供的特定样本而不转动本地代码来执行这种搜索。 因此，在执行多普勒搜索时，可以使用相同的本地代码来搜索不同的频率而不旋转。 在执行代码相位搜索时，窗口样本可以从确定正在搜索的特定阶段的位置的不同位置开始。

公开(公告)号：US20090208213A1

公开(公告)日：2009-08-20

申请号：US12320483

申请日：2009-01-27

Applicant: Masahiro Sarashina

Inventor： Masahiro Sarashina

IPC: H04J14/00

CPC classification number: H04B1/707 ,  H04B2201/70715 ,  H04J13/00

Abstract: In a code division multiplex transmitting and receiving system, the transmitting apparatus inserts a clock signal in the code division multiplex signal. The clock signal has a frequency equal to a null frequency in the frequency spectrum of the code division multiplex signal. The receiving apparatus extracts this frequency component from the received signal and recovers the clock signal, using an ordinary clock recovery device of the type designed to recover a clock signal from a bi-level signal. The recovered clock signal is used as a synchronizing signal in the processing of the received signal.

Abstract translation: 在码分多址发送和接收系统中，发送装置在码分多路复用信号中插入时钟信号。 时钟信号的频率等于码分多路复用信号的频谱中的零频率。 接收装置从接收到的信号中提取该频率分量，并使用被设计为从双电平信号恢复时钟信号的类型的普通时钟恢复装置恢复时钟信号。 恢复的时钟信号在接收信号的处理中用作同步信号。

公开(公告)号：US20090208211A1

公开(公告)日：2009-08-20

申请号：US12320157

申请日：2009-01-21

Applicant: Hideaki Tamai

Inventor： Hideaki Tamai

IPC: H04J14/00

CPC classification number: H04B1/707 ,  H04B10/27 ,  H04B10/272 ,  H04B2201/70715

Abstract: An optical communications network in which one optical line terminal is connected to multiple optical network units and in which code division multiplexing communication is carried out between the optical line terminal and the optical network units. The optical intensities of upstream optical signals transmitted from each optical network unit are made constant at the time of multiplexing by an optical directional coupler, and the optical intensity of a downstream optical signal received by an optical network unit and an upstream optical signal received by the optical line terminal is contained within a dynamic range. Each optical network unit is provided with a variable optical attenuator that is common for an upstream optical signal and a downstream optical signal. The upstream optical signal and the downstream optical signal are attenuated by an equal attenuation. Moreover, the optical line terminal controls the attenuation at the variable optical attenuator.

Abstract translation: 一种光通信网络，其中一个光线路终端连接到多个光网络单元，并且其中在光线路终端和光网络单元之间执行码分复用通信。 从光网络单元发送的上行光信号的光强度在光定向耦合器复用时保持恒定，由光网络单元接收的下行光信号的光强度和 光线路终端包含在动态范围内。 每个光网络单元设置有对于上行光信号和下行光信号是公共的可变光衰减器。 上游光信号和下行光信号衰减相等的衰减。 此外，光线路终端控制可变光衰减器处的衰减。

公开(公告)号：US20090195419A1

公开(公告)日：2009-08-06

申请号：US12203347

申请日：2008-09-03

Applicant: Ping Hsuan Tsu ,  Chun-Nan Chen

Inventor： Ping Hsuan Tsu ,  Chun-Nan Chen

IPC: H03M7/00

CPC classification number: H04B1/7075 ,  G01S19/30 ,  G01S19/37 ,  H04B2201/70707 ,  H04B2201/70715

Abstract: The invention provides a memory code generator. In one embodiment, the memory code generator comprises a code memory, a preparation buffer set, and a correlation buffer set. The code memory stores code data. The preparation buffer set retrieves a first code segment of the code data from the code memory, and shifts the first code segment to obtain a second code segment with a desired code phase required by the correlation buffer set. The correlation buffer set loads the second code segment from the preparation buffer set, and provides a correlation code for correlation according to the second code segment. The preparation buffer set prepares the second code segment corresponding to a subsequent correlation when the correlation buffer set is providing the correlation code for a current correlation according to the first code segment.

Abstract translation: 本发明提供了一种存储器代码生成器。 在一个实施例中，存储器代码生成器包括代码存储器，准备缓冲器组和相关缓冲器组。 代码存储器存储代码数据。 准备缓冲器组从代码存储器中检索代码数据的第一代码段，并移位第一代码段以获得具有相关缓冲器组所需的期望代码相位的第二代码段。 相关缓冲器集合从准备缓冲器集合加载第二代码段，并根据第二代码段提供相关代码。 当相关缓冲器组根据第一代码段为当前的相关提供相关代码时，准备缓冲器组准备对应于后续相关的第二代码段。

公开(公告)号：US20090180520A1

公开(公告)日：2009-07-16

申请号：US12349207

申请日：2009-01-06

Applicant: Yosuke Kobayashi

Inventor： Yosuke Kobayashi

IPC: H04B1/707

CPC classification number: G01S19/30 ,  H04B1/7085 ,  H04B2201/70715

Abstract: A positioning apparatus has an oscillator that generates a reproduced carrier wave which keeps track of a carrier wave of a satellite signal; a pseudo noise generator that generates a pseudo noise code unique to a satellite; a control section that controls a phase of the pseudo noise code in accordance with a change in the phase of the reproduced carrier wave, to thus control the pseudo noise generator so as to keep constant a difference between the phase of the pseudo noise code included in a satellite signal and the phase of the pseudo noise code; a timing generation section that generates a timing associated with a rise or fall of the pseudo noise code; a frequency generation section that generates at least one frequency signal; a sampling section that samples an amplitude of the satellite signal by means of a frequency signal; a cumulative addition section that cumulatively adds a signal sampled by the sampling section; and a phase difference computing section that computes a phase difference between the pseudo noise code included in the satellite signal and the pseudo noise code by use of a result of cumulative addition. The frequency generation section selects a frequency signal in synchronism with a timing generated by the timing generation section.

Abstract translation: 定位装置具有振荡器，该振荡器产生跟踪卫星信号载波的再现载波; 伪噪声发生器，其产生卫星唯一的伪噪声码; 控制部，其根据再生载波的相位变化来控制伪噪声码的相位，从而控制伪噪声发生器，使得包含在伪噪声码中的伪噪声码的相位之间保持不变 卫星信号和伪噪声码的相位; 定时产生部分，其产生与伪噪声码的上升或下降相关联的定时; 频率产生部，其生成至少一个频率信号; 采样部，其通过频率信号对卫星信号的振幅进行采样; 累积加法部分，其累积地加上由采样部分采样的信号; 以及相位差计算部分，其通过使用累积加法的结果来计算包括在卫星信号中的伪噪声码与伪噪声码之间的相位差。 频率产生部分与由定时产生部分产生的定时同步地选择频率信号。

公开(公告)号：US20090179795A1

公开(公告)日：2009-07-16

申请号：US12342283

申请日：2008-12-23

Applicant: Mark Isaakovich ZHODZISHSKY ,  Victor Abramovich VEITSEL ,  Vladimir Victorovich BELOGLAZOV ,  Andrey Vladimirovich VEITSEL ,  Sergey Borisovich YUDANOV

Inventor： Mark Isaakovich ZHODZISHSKY ,  Victor Abramovich VEITSEL ,  Vladimir Victorovich BELOGLAZOV ,  Andrey Vladimirovich VEITSEL ,  Sergey Borisovich YUDANOV

IPC: G01S1/00

CPC classification number: H04B1/7097 ,  G01S19/23 ,  G01S19/24 ,  H04B1/7075 ,  H04B17/3912 ,  H04B2201/70715

Abstract: The energy potential of a receiver receiving signals from a navigation satellite is calculated according to an algorithm which is a function of an estimate of the mean and an estimate of the variance of a correlation signal. Improving the accuracy of measuring the energy potential may be achieved by improving the variance estimate. The variance estimate may be determined from measurements of the correlation signal over long time intervals during operation of the receiver. The variance estimate may also be determined during a calibration procedure, or by mathematical modeling of the receiver.

Abstract translation: 根据作为平均值的估计和相关信号的方差的估计的函数的算法计算从导航卫星接收信号的接收机的能量势。 提高测量能量电位的准确性可以通过改进方差估计来实现。 可以在接收机操作期间通过长时间间隔的相关信号的测量来确定方差估计。 方差估计也可以在校准过程期间或通过接收器的数学建模来确定。

公开(公告)号：US07558312B2

公开(公告)日：2009-07-07

申请号：US11172443

申请日：2005-06-30

Applicant: MingQiang Cheng ,  ShiJie Li ,  Bo Yu

Inventor： MingQiang Cheng ,  ShiJie Li ,  Bo Yu

IPC: H04B1/00

CPC classification number: H04B1/7095 ,  G01S19/30 ,  H04B1/70752 ,  H04B2201/70715

Abstract: An apparatus for processing spread spectrum signals digitized at a predetermined sampling frequency. The apparatus includes an intermediate frequency signal preprocessing unit, a plurality of parallel block integrators. The intermediate frequency signal preprocessing unit is capable of generating pre-integration results based on an input signal and local reference signals at a predetermined rate. The pre-integration results produced by the intermediate frequency signal preprocessing unit are grouped into sets of pre-integration results. Each set of the pre-integration results contains a predetermined number of pre-integration results. The plurality of parallel block integrators is in communication with the intermediate frequency signal preprocessing unit. Each of the block integrators is capable of receiving, in succession, sets of a predetermined number of pre-integration results, and for each set of predetermined number of pre-integration results, each of the block integrators is capable of performing a plurality of partial correlations based on the set of the predetermined number of pre-integration results and a plurality of shifted segments of a pseudorandom noise code until a next set of pre-integration results are received by the block integrator.

Abstract translation: 一种用于处理以预定采样频率数字化的扩频信号的装置。 该装置包括中频信号预处理单元，多个并行块积分器。 中频信号预处理单元能够以预定速率产生基于输入信号和本地参考信号的预积分结果。 由中频信号预处理单元产生的预积分结果被分组成一组预积分结果。 每组预积分结果包含预定数量的预积分结果。 多个并行块积分器与中频信号预处理单元通信。 每个块积分器能够连续地接收预定数量的预积分结果的集合，并且对于每组预定数量的预积分结果，每个块积分器能够执行多个部分 基于预定数量的预积分结果的集合和伪随机噪声码的多个移位段直到下一组预积分结果被块积分器接收的相关性。

公开(公告)号：US07548787B2

公开(公告)日：2009-06-16

申请号：US11197670

申请日：2005-08-03

Applicant: Kamilo Feher

Inventor： Kamilo Feher

IPC: A61N1/362

CPC classification number: H04L27/2602 ,  A61B5/0015 ,  A61B5/0022 ,  A61B5/01 ,  A61B5/024 ,  A61B5/14532 ,  G06F19/00 ,  G16H10/60 ,  G16H15/00 ,  H04B1/1036 ,  H04B1/69 ,  H04B1/707 ,  H04B1/709 ,  H04B7/04 ,  H04B7/18504 ,  H04B7/2628 ,  H04B2201/70715 ,  H04B2201/70716 ,  H04J11/00 ,  H04L1/0003 ,  H04L5/0007 ,  H04L5/1453 ,  H04L27/2017 ,  H04L27/2071 ,  H04L27/2627 ,  H04L27/2649 ,  H04M7/006 ,  H04W4/023 ,  H04W4/025 ,  H04W4/90 ,  H04W12/06 ,  H04W64/00 ,  H04W88/02 ,  H04W88/06 ,  Y02A90/26

Abstract: Cardiac stimulation device and wireless communication system, without magnetic detection or magnetic control of the heart pacemaker parameters, having leads for carrying stimulating pulses to and or from one or more electrodes located in a heart and a pulse generator configured to generate stimulation pulses. In certain embodiments and environments the heart pacemaker could operate in an emergency room, even during Magnetic Resonance Imaging (MRI) diagnostic studies.A processor for connection of the stimulating pulses to and/or from one or more spread spectrum transmitter-receiver (T/R) circuits and/or from a signal processing network for receiving said stimulation pulses and for providing cross-correlated in-phase and quadrature-phase baseband signals. One or more modulators and demodulators for transmission and/or reception of one or more spread spectrum and/or cross-correlated signals.

Abstract translation: 心脏刺激装置和无线通信系统，没有心脏起搏器参数的磁性检测或磁控制，具有用于向位于心脏中的一个或多个电极施加刺激脉冲的引线和被配置为产生刺激脉冲的脉冲发生器的引线。 在某些实施例和环境中，即使在磁共振成像（MRI）诊断研究期间，心脏起搏器也可以在急诊室中操作。 用于将刺激脉冲连接到一个或多个扩频发射机 - 接收机（T / R）电路和/或从用于接收所述刺激脉冲的信号处理网络和/或用于提供交叉相位同步和 正交相位基带信号。 用于传输和/或接收一个或多个扩展频谱和/或交叉相关信号的一个或多个调制器和解调器。

公开(公告)号：US20090109088A1

公开(公告)日：2009-04-30

申请号：US12044431

申请日：2008-03-07

Applicant: Roderick C. Bryant ,  Andrew G. Dempster ,  Stanley L. Dougan ,  Trevor Hobbs ,  Eamonn P. Glennon

Inventor： Roderick C. Bryant ,  Andrew G. Dempster ,  Stanley L. Dougan ,  Trevor Hobbs ,  Eamonn P. Glennon

IPC: G01S5/14

CPC classification number: G01S19/27 ,  G01S5/10 ,  G01S19/05 ,  G01S19/06 ,  G01S19/23 ,  G01S19/24 ,  G01S19/25 ,  G01S19/42 ,  H04B2201/70715

Abstract: A method, device and system for determining a receiver location using weak signal satellite transmissions. The invention involves a sequence of exchanges between an aiding source and a receiver that serve to provide aiding information to the receiver so that the receiver's location may be determined in the presence of weak satellite transmissions. With the aiding information, the novel receiver detects, acquires and tracks weak satellite signals and computes position solutions from calculated pseudo ranges despite the inability to extract time synchronization date f, 'n the weak satellite signals. The invention includes as features, methods and apparatus for the calibration of a local oscillator, the cancellation of cross correlations, a Doppler location scheme, an ensemble averaging scheme, the calculation of almanac aiding from a table of orbit coefficients, absolute time determination, and a modified search engine.

Abstract translation: 一种使用弱信号卫星传输来确定接收机位置的方法，装置和系统。 本发明涉及辅助源和接收机之间的交换序列，其用于向接收机提供辅助信息，使得可以在存在弱卫星传输的情况下确定接收机的位置。 利用辅助信息，新型接收机检测，获取和跟踪弱卫星信号，并且从计算的伪距离计算位置解，尽管无法提取时间同步日期f，即弱卫星信号。 本发明包括用于校准本地振荡器的特征，方法和装置，互相关的消除，多普勒定位方案，整体平均方案，从轨道系数表计算年历，绝对时间确定和 修改后的搜索引擎。

公开(公告)号：US07505508B2

公开(公告)日：2009-03-17

申请号：US11849333

申请日：2007-09-03

Applicant: Mark C. Sullivan

Inventor： Mark C. Sullivan

IPC: H04B1/707

CPC classification number: G01S19/29 ,  G01S19/235 ,  G01S19/258 ,  G01S19/30 ,  H04B1/7077 ,  H04B2201/70715

Abstract: A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.