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18 条记录 (耗时 0.014 秒)

    Magnetic recording tape and method for fabricating same
    12.
    发明公开
    Magnetic recording tape and method for fabricating same 失效
    Magnetisches Aufzeichnungsband und Verfahren zu seiner Herstellung。

    公开(公告)号：EP0487334A1

    公开(公告)日：1992-05-27

    申请号：EP91310710.8

    申请日：1991-11-20

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Suzuki, Hiroshi ,  Shimasaki, Yukihiro ,  Sakamoto, Kazunori ,  Mido, Yuji ,  Kisoda, Akira ,  Hirokoh, Masaki

    IPC分类号： G11B5/704

    CPC分类号： G11B5/7305 ,  G11B5/708 ,  G11B5/71

    摘要： A magnetic recording tape of the type which comprises a non-magnetic support and a magnetic layer comprised of a magnetic powder and a binder resin and formed on at least one side of the non-magnetic support is described. The tape has a total tickness of from 4.0 to 20.0 µ m and the magnetic layer has a root mean square surface roughness of from 2.0 nm to 5.5 nm with a value of from the root mean square plane to a deepest recess of from 8 to 25 nm. The magnetic layer has a coefficient of friction of not larger than 0.25 and has an amount of the binder resin, which is dissolved out in tetrahydrofluran, of not larger than 4.5 wt% of the magnetic layer. By this the magnetic tape has good surface smoothness, vacuum deposited metallic film, while being imparted with good film strength and runnability. Methods for fabricating such a magnetic tape are also disclosed.

    摘要翻译： 描述了一种磁记录带，其包括非磁性支撑体和由非磁性载体的至少一侧上形成的磁性粉末和粘合剂树脂构成的磁性层。 磁带的总刻度为4.0至20.0μm，磁性层的均方根表面粗糙度为2.0nm至5.5nm，从均方根到最深凹陷的值为8至25 纳米。 磁性层的摩擦系数为0.25以下，溶解于四氢呋喃中的粘合剂树脂的量为磁性层的4.5重量％以下。 由此，磁带具有良好的表面光滑度，真空沉积金属膜，同时具有良好的膜强度和运行性能。 还公开了制造这种磁带的方法。

    Diversity receiver and diversity receiving method for FDM signals
    14.
    发明公开
    Diversity receiver and diversity receiving method for FDM signals 审中-公开
    FDM-Signale的DiversitätsempfängerundDiversitätsempfangsverfahren

    公开(公告)号：EP1408625A3

    公开(公告)日：2006-09-06

    申请号：EP03022810.0

    申请日：2003-10-07

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kisoda, Akira ,  Taniguchi, Tomohiko ,  Mizoguchi, Yoshitaka ,  Yagi, Tetsuya

    IPC分类号： H04B7/08 ,  H04L27/26

    CPC分类号： H04B7/0848 ,  H04B7/082 ,  H04B7/0871 ,  H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414

    摘要： In a diversity receiver comprising an AGC section (107,108) for controlling the gain of a tuner (105,106), an equalizer (115,116) equalizes an outputted signal from a fast Fourier transformer (113,114). A reliability calculator (125A,126A) calculates the reliability value of each of carriers by an equalized pilot signal obtained from the equalizer. A reliability value corrector corrects the reliability value by outputted information from the AGC section. A carrier selecting/combining section (127) performs one of selecting and weighting combining for the carrier in a branch in accordance with the corrected reliability value. When a Viterbi decoder is provided, the Viterbi decoder weights an output from the carrier selecting/combining section with a new reliability value to perform maximum likelihood decoding. It is possible to prevent a reliability value which does not reflect an actually received power from being calculated as a result of increasing a power by an AGC in spatial diversity for every OFDM or FDM demodulated carrier. Even in the case of mobile reception, data with high reliability can be decoded.

    摘要翻译： 分集接收机包括载波选择和合成部分（127），其基于可靠性值执行每个分支中的每个载波的选择和加权组合之一。 基于从均衡器（115,116）输出的导频信号的状态，通过可靠性计算器（125A，126A）为每个载波计算可靠性值。 还包括用于分集接收方法的独立权利要求。

    Broadcast interference elimination in OFDM receiving systems
    15.
    发明公开
    Broadcast interference elimination in OFDM receiving systems 审中-公开
    OFDM系统中的Unterdrückungvon Rundfunkinterferenz

    公开(公告)号：EP1689139A2

    公开(公告)日：2006-08-09

    申请号：EP06002084.9

    申请日：2006-02-01

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Kisoda, Akira

    IPC分类号： H04L27/26

    CPC分类号： H04L1/0054 ,  H04B1/123 ,  H04B17/345 ,  H04L27/2647

    摘要： A receiver determines whether co-channel interference is occurring using frequency characteristics of an analog television broadcast wave, and when co-channel interference is occurring, sets reliability information reflecting the frequency characteristic of the analog television broadcast wave for each carrier.

    摘要翻译： 接收机确定是否使用模拟电视广播波的频率特性进行同频道干扰，并且当发生同频道干扰时，设置反映每个载波的模拟电视广播波的频率特性的可靠性信息。

    Diversity system and diversity method
    17.
    发明公开
    Diversity system and diversity method 审中-公开
    Verfahren und Vorrichtung zurDiversität

    公开(公告)号：EP1363411A1

    公开(公告)日：2003-11-19

    申请号：EP03010622.3

    申请日：2003-05-12

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kisoda, Akira ,  Mizoguchi, Yoshitaka

    IPC分类号： H04B7/08 ,  H04L27/26

    CPC分类号： H04L27/2655 ,  H04B7/0842 ,  H04L1/06

    摘要： A synchronous signal position detection unit detects symbol synchronous signals according to OFDM from the signals received by the respective antennas. A delay measurement unit measures a relative delay between the symbol synchronous signals for each antenna series and makes a notice to a memory unit via a delay amount notification unit. A diversity operation implementation unit temporally aligns the carrier data positions of the OFDM symbols for each antenna series so as to implement a space diversity operation.

    摘要翻译： 同步信号位置检测单元根据由各个天线接收的信号根据OFDM检测符号同步信号。 延迟测量单元测量每个天线系列的符号同步信号之间的相对延迟，并通过延迟量通知单元通知存储单元。 分集操作实现单元在时间上对准每个天线系列的OFDM符号的载波数据位置，以便实现空间分集操作。

    Synchronisation of the local oscillator and of the sampling clock in a multicarrier receiver
    18.
    发明公开
    Synchronisation of the local oscillator and of the sampling clock in a multicarrier receiver 失效
    在einemMehrträgerempfänger的同义词Oszillators und des Abtasttaktes

    公开(公告)号：EP0798903A2

    公开(公告)日：1997-10-01

    申请号：EP97105215.4

    申请日：1997-03-27

    申请人： Advanced Digital Television Broadcasting Laboratory ,  MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kimura, Tomohiro ,  Harada, Yasuo ,  Kageyama, Sadashi ,  Kisoda, Akira ,  Hayashi, Kenichiro ,  Hayashino, Hiroshi

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2657 ,  H04L27/2662 ,  H04L27/2678

    摘要： A quadrature detection circuit (31) quadrature detects an OFDM signal with a local carrier-wave signal to obtain a sampled OFDM signal for each sampling clock. A delay circuit (33) delays the sampled OFDM signal by the number of clocks corresponding to an effective symbol period in response to the sampling clock. Then, filter circuits (34 and 35) extract signal component from sampled OFDM signal delayed by delay circuit (33) in different frequency regions. Correlation circuits (36 and 37) obtain correlation vector between each of filter outputs and the sampled OFDM signal. A frequency control circuit (38) obtains frequency error of the local carrier-wave signal and that of the sampling clock in accordance with the sum and difference in the phase angle of each correlation vectors. In accordance with the error, the frequency of the local carrier-wave signal and that of the sampling clock are controlled. As a result, the frequencies of the local carrier-wave signal for quadrature detection and the sampling clock can be synchronized with the OFDM signal at high speed and without any influence of noise.

    摘要翻译： 正交检测电路（31）正交检测用本地载波信号的OFDM信号，以获得每个采样时钟的采样OFDM信号。 延迟电路（33）响应采样时钟将采样的OFDM信号延迟与有效符号周期对应的时钟数。 然后，滤波电路（34,35）从不同频率区域延迟电路（33）延迟的采样OFDM信号中提取信号分量。 相关电路（36和37）获得滤波器输出和采样的OFDM信号之间的相关矢量。 频率控制电路（38）根据每个相关矢量的相位角的和和得到本地载波信号和采样时钟的频率误差。 根据误差，控制本地载波信号和采样时钟的频率。 结果，用于正交检测的本地载波信号和采样时钟的频率可以与OFDM信号以高速同步并且不受噪声的任何影响。