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    • 3. 发明申请
    • Position Estimation Device, Position Estimation Method, And Program
    • 位置估计装置,位置估计方法和程序
    • US20130108172A1
    • 2013-05-02
    • US13698572
    • 2011-02-10
    • Noppharit TongprasitAram KawewongOsamu Hasegawa
    • Noppharit TongprasitAram KawewongOsamu Hasegawa
    • G06K9/00
    • G06K9/00624G06K9/00664G06T7/73
    • Disclosed is a position estimation device including a feature extraction unit that extracts invariant features from an input image, a matching unit that obtains matching between an input image and a registered place by referring to a database containing each registered place and invariant features in association, a similarity calculation unit that calculates a similarity with inclusion of a registered place near a selected registered place when the matching is a threshold or more, and a position identification unit that identifies the input image as a registered place when the similarity is a threshold or more. The feature extraction unit extracts local features from each input image being sequential images taken sequentially, selects features matched between the sequential images as sequential features, and calculates invariant features based on the sequential features. The number of sequential images is variable depending on the number of matched features.
    • 公开了一种位置估计装置,其包括从输入图像中提取不变特征的特征提取单元,通过参照包含关联的每个登记地点和不变特征的数据库,获得输入图像与登记地点之间的匹配的匹配单元, 相似度计算单元,当所述匹配是阈值以上时,计算包含所选登记地点附近的登记地点的相似度;以及位置识别单元,当所述相似度为阈值以上时,将所述输入图像识别为登记地点。 特征提取单元从每个输入图像中提取作为顺序拍摄的顺序图像的局部特征,选择在顺序图像之间匹配的特征作为顺序特征,并且基于顺序特征来计算不变特征。 顺序图像的数量根据匹配的特征数量而变化。
    • 4. 发明申请
    • Receiver for receiving a spectrum dispersion signal
    • 用于接收频谱色散信号的接收器
    • US20080049815A1
    • 2008-02-28
    • US11907423
    • 2007-10-12
    • Shigeyuki SudoOsamu HasegawaToshiya Eguchi
    • Shigeyuki SudoOsamu HasegawaToshiya Eguchi
    • H04B1/707
    • H04B1/70756H04B1/707H04B1/7075H04B2201/70709H04W52/029Y02D70/26Y02D70/40
    • A receiver for the CDMA system which reduces power consumption during a suspension period of intermittent receiving operation by monitoring a suspension period by a low-power timer so that a VC-TCXO, reference signal group generation and receiving units are turned off and a modem unit is set to a sleep state. Upon resumption of receiving operation, a high-accuracy timer is started to count a time period and part of a received signal is stored. A PN code phase of stored data is calculated during the time period to obtain an indication value for phase deviation. State vectors for short and long codes and a further reception time are calculated based on the indication value. When the high-accuracy timer counts the time period and produces 0V(d), demodulation operation by a rake demodulation, demultiplexing, and descrambler units is started and is continued during the reception time.
    • 一种用于CDMA系统的接收机,其通过由低功率定时器监视暂停时段来减少在间歇接收操作的暂停时间段期间的功耗,从而关闭VC-TCXO,参考信号组生成和接收单元以及调制解调器单元 被设置为睡眠状态。 在恢复接收操作时,开始高精度定时器对一段时间进行计数,并存储接收信号的一部分。 在该时间段内计算存储数据的PN码相位,以获得相位偏差的指示值。 基于指示值计算短码和长码的状态向量和另外的接收时间。 当高精度定时器对时间段进行计数并产生0V(d)时,起动解调,解复用和解扰器单元的解调操作开始并且在接收时间期间继续。
    • 9. 发明授权
    • Automatic frequency control circuit
    • 自动频率控制电路
    • US06571088B1
    • 2003-05-27
    • US09602553
    • 2000-06-23
    • Osamu Hasegawa
    • Osamu Hasegawa
    • H04B118
    • H04L27/2332H03J7/065H04L2027/0065H04L2027/0073H04L2027/0077H04L2027/0095
    • In an AFC ((Automatic Frequency Control) circuit, a frequency offset estimating circuit (11) produces a lock signal (102) if a calculated frequency error becomes smaller than a predetermined value. Then, a CPU (13) produces a control signal (104) to stop the operation of the frequency offset estimating circuit (11). A timing generating circuit (14) calculates a frequency error with reference to a frame timing correction amount from a delay profile/search circuit (12), and produces an unlock signal (103) if the frequency error becomes equal to or greater than the predetermined value. Then, the CPU (13) produces the control signal (104) to start the operation of the frequency offset estimating circuit (11). Thus, the frequency offset estimating circuit (11) stops its operation while the AFC operation is in the locked state.
    • 在AFC((Automatic Frequency Control,自动频率控制)电路中,如果计算出的频率误差小于预定值,则频率偏移估计电路产生锁定信号(102),CPU(13)产生控制信号 定时生成电路(14)根据来自延迟分布/搜索电路(12)的帧定时校正量来计算频率误差,并产生解锁 信号(103)如果频率误差变得等于或大于预定值,则CPU(13)产生控制信号(104)以开始频率偏移估计电路(11)的操作,因此频率 偏移估计电路(11)在AFC操作处于锁定状态时停止其操作。