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    • 1. 发明授权
    • Diversity receiver and diversity receiving method
    • 分集接收机和分集接收方法
    • US08194809B2
    • 2012-06-05
    • US12294684
    • 2006-03-28
    • Kazuhiko NakayamaShoichi FujitaMakoto Sasaki
    • Kazuhiko NakayamaShoichi FujitaMakoto Sasaki
    • H04L1/04
    • H04B7/0871
    • A purpose of the present invention is to provide a diversity receiver and a diversity receiving method, which are capable of performing a diversity reception without depending upon a moving speed, and also capable of achieving compatibility between reception performance and current consumption. A bit error rate calculator (107) calculates a bit error rate from a demodulation result of a demodulator (106); a switching frequency calculator (108) calculates a switching frequency which corresponds to such a frequency for alternately switching initiating and stopping operations of the diversity reception in response to the bit error rate calculated by the bit error rate calculator (107); and a switching controller (105) performs a switching operation for selecting both two receivers (103, 104), and another switching operation for selecting any one of the two receivers (103, 104) in accordance with the switching frequency calculated by the switching frequency calculator (108) so as to synthesize respective output signals with each other to output a synthesized signal in a case where two sets of the receivers (103, 104) are selected.
    • 本发明的目的是提供一种分集接收机和分集接收方法,其能够在不依赖于移动速度的情况下进行分集接收,并且还能够实现接收性能和电流消耗之间的兼容性。 误码率计算器(107)根据解调器(106)的解调结果计算误码率; 切换频率计算器(108)响应于由误码率计算器(107)计算出的误码率,计算与用于交替地切换分集接收的发起和停止操作的频率对应的切换频率; 切换控制器(105)进行用于选择两个接收机(103,104)的切换动作,以及根据由切换频率计算出的切换频率来选择两个接收机(103,104)中的任意一个的切换动作 计算器(108),以便在选择两组接收机(103,104)的情况下,相互合成各自的输出信号以输出合成信号。
    • 2. 发明申请
    • DIVERSITY RECEIVER AND DIVERSITY RECEIVING METHOD
    • 多样性接收者和多样性接收方法
    • US20100226465A1
    • 2010-09-09
    • US12294684
    • 2006-03-28
    • Kazuhiko NakayamaShoichi FujitaMakoto Sasaki
    • Kazuhiko NakayamaShoichi FujitaMakoto Sasaki
    • H04L1/04
    • H04B7/0871
    • A purpose of the present invention is to provide a diversity receiver and a diversity receiving method, which are capable of performing a diversity reception without depending upon a moving speed, and also capable of achieving compatibility between reception performance and current consumption. A bit error rate calculator (107) calculates a bit error rate from a demodulation result of a demodulator (106); a switching frequency calculator (108) calculates a switching frequency which corresponds to such a frequency for alternately switching initiating and stopping operations of the diversity reception in response to the bit error rate calculated by the bit error rate calculator (107); and a switching controller (105) performs a switching operation for selecting both two receivers (103, 104), and another switching operation for selecting any one of the two receivers (103, 104) in accordance with the switching frequency calculated by the switching frequency calculator (108) so as to synthesize respective output signals with each other to output a synthesized signal in a case where two sets of the receivers (103, 104) are selected.
    • 本发明的目的是提供一种分集接收机和分集接收方法,其能够在不依赖于移动速度的情况下进行分集接收,并且还能够实现接收性能和电流消耗之间的兼容性。 误码率计算器(107)根据解调器(106)的解调结果计算误码率; 切换频率计算器(108)响应于由误码率计算器(107)计算出的误码率,计算与用于交替地切换分集接收的发起和停止操作的频率对应的切换频率; 切换控制器(105)进行用于选择两个接收机(103,104)的切换动作,以及根据由切换频率计算出的切换频率来选择两个接收机(103,104)中的任意一个的切换动作 计算器(108),以便在选择两组接收机(103,104)的情况下,相互合成各自的输出信号以输出合成信号。
    • 4. 发明申请
    • MULTI CARRIER TRANSMISSION DEVICE, MULTI CARRIER RECEPTION DEVICE, AND COMMUNICATION METHOD
    • 多载波传输设备,多载波接收设备和通信方法
    • US20090092193A1
    • 2009-04-09
    • US12093922
    • 2006-11-15
    • Shoichi Fujita
    • Shoichi Fujita
    • H04L27/28
    • H04L27/366H04L27/2647H04L27/3809H04L2027/0016H04L2027/0024
    • Provided is a multi carrier transmission device capable of compensating the delay time and the imbalance and the orthogonal difference between the in-phase component and the orthogonal component of the amplitude at a low cost without increasing the circuit size. In this device, a coordinate conversion unit (103) performs coordinate conversion of each symbol of m-series transmission signals so as to be symmetric with respect to the I-axis or the Q-axis of the I-Q plane or a line passing through the origin and having a positive 45-degree inclination with respect to the I-axis. A sub carrier arrangement unit (104) generates 2m-series parallel complex signals so that the symbols before and after the coordinate conversion with symmetry with respect to the I-axis or the Q-axis of the I-Q plane or a line passing through the origin and having a positive 45-degree inclination with respect to the I-axis are arranged on symmetric sub carries on the frequency axis with respect to a central frequency of a predetermined communication band.
    • 提供一种能够在不增加电路尺寸的情况下以较低的成本补偿延迟时间和不平衡以及振幅的同相分量和正交分量之间的正交差异的多载波传输设备。 在该装置中,坐标转换单元(103)执行m系列发送信号的每个符号的坐标转换,以便相对于IQ平面的I轴或Q轴对称或通过 并且具有相对于I轴的正45度倾斜度。 子载波布置单元(104)产生2m系列并行复信号,使得坐标转换之前和之后的符号相对于IQ平面的I轴或Q轴或通过原点的线对称 并且相对于I轴具有正45度倾斜度的对称子载体相对于预定通信带的中心频率被布置在频率轴上。
    • 6. 发明授权
    • Polyisocyanates and resin compositions thereof
    • 聚异氰酸酯及其树脂组合物
    • US4731415A
    • 1988-03-15
    • US847392
    • 1986-04-02
    • Shoichi FujitaKohji Nasu
    • Shoichi FujitaKohji Nasu
    • C07C273/18C07C275/62C08G18/78C08G18/76
    • C08G18/7831C07C273/1809
    • A polyisocyanate having a biuret structure obtained by allowing .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-xylylene diisocyanate, a diisocyanate represented by the general formula:OCN--CH.sub.2 --R--CH.sub.2 --NCOwherein R is a divalent hydrocarbon residue and water to react.The polyisocyanate is used in the form of the two-part type of polyurethane composition in combination with a polyol.The composition can provide coating films which excel in every physical properties required for the coating film, such as drying property, impact resistance, weathering resistance and chemical resistance, and therefore are advantageously used, for example, as a paint for automobile repairing uses, etc.
    • 具有通过使α,α,α',α'-四甲基 - 亚二甲苯基二异氰酸酯,由通式OCN-CH2-R-CH2-NCO表示的二异氰酸酯,其中R是二价烃残基和水 反应。 多异氰酸酯以两部分类型的聚氨酯组合物与多元醇组合的形式使用。 该组合物可以提供优异的涂膜所需的每种物理性能的涂膜,例如干燥性,耐冲击性,耐候性和耐化学性,因此有利地用于例如汽车修补用途的涂料等。 。
    • 9. 发明申请
    • Cdma communication apparatus and cdma communication method
    • Cdma通信设备和cdma通信方式
    • US20070183482A1
    • 2007-08-09
    • US11628800
    • 2004-11-19
    • Shoichi FujitaTakao Nihei
    • Shoichi FujitaTakao Nihei
    • H04B1/00
    • H04L25/0226H04J13/10H04L5/0016H04L5/0048H04L27/2613
    • A CDMA communication apparatus wherein resistance against phase noise can be improved without degradation of transmission efficiency. In this apparatus, spread parts (110-1 to 110-n) spread the respective ones of transmission signals (1 to n). Coordinate transformation parts (120-1 to 120-n) interchange the in-phase and quadrature components of the signals as spread for each chip. A multiplexing part (130) multiplexes the n signals as coordinate transformed with known signals used for transmission path compensation. Coordinate transformation parts (250-1 to 250-n) interchange, for each chip, the in-phase and quadrature components of serial signals as outputted from a P/S conversion part (240) such that the coordinate transformations of the coordinate transformation parts (120-1 to 120-n) at the transmission end are reversed. Despread parts (260-1 to 260-n) despread the n signals as coordinate transformed by the coordinate transformation parts (250-1 to 250-n) to output reception signals (1 to n).
    • 可以在不降低传输效率的情况下提高抗相位噪声的CDMA通信装置。 在该装置中,扩展部分(110-1至110-n)扩展传输信号(1至n)中的各个。 坐标变换部分(120-1至120 -n)将信号的同相和正交分量互换为每个芯片的扩展。 复用部分(130)将n信号复用为用于传输路径补偿的已知信号的坐标变换。 对于每个芯片,坐标变换部分(250-1至250-n)交换从P / S转换部分(240)输出的串行信号的同相和正交分量,使得坐标变换部分 (120-1至120-n)相反。 扩展部分(260-1至260-n)将n信号解扩展为由坐标变换部分(250-1至250-n)变换的坐标,以输出接收信号(1至n)。