利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.011 秒)

    OFDM DEMODULATION DEVICE AND METHOD
    1.
    发明公开
    OFDM DEMODULATION DEVICE AND METHOD 有权
    OFDM-DEMODULATIONSEINRICHTUNG UND VERFAHREN

    公开(公告)号：EP1983674A1

    公开(公告)日：2008-10-22

    申请号：EP07713863.4

    申请日：2007-02-06

    申请人： Sony Corporation

    发明人： OKAMOTO, Takuya ,  YAMAGATA, Taku ,  OKADA, Takahiro

    IPC分类号： H04J11/00

    CPC分类号： H04L27/2657 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2675

    摘要： The present invention provides an OFDM demodulation device for demodulating an orthogonal frequency division multiplexed (OFDM) signal whose transmission unit is a transmission symbol produced by quadrature modulation in such a way that information is divided for a plurality of subcarriers in a predetermined band. The OFDM demodulation device includes a carrier frequency offset detecting circuit (20). The carrier frequency offset detecting circuit divides the subcarriers at the positions at which a TMCC signal, an AC signal, or a CP signal is inserted, defined in conformity with the standard when a specific offset amount is assumed, into a plurality of groups; maps the squares of phase rotation amounts with respect to an immediately-previous OFDM symbol on a complex plane; converts the squares to rotation vectors; cumulatively adds the rotation vectors to each other for each of the groups to thereby calculate the absolute values of the cumulative-addition-result values; and adds the absolute values of the cumulative-addition-result values calculated on a group-by-group basis to each other for all the groups to thereby calculate the addition-result absolute value, thereby defining the offset amount assumed when the maximum addition-result absolute value is obtained as the carrier frequency offset amount.

    摘要翻译： 本发明提供一种OFDM解调装置，用于解调正交频分多路复用（OFDM）信号，该正交频分复用（OFDM）信号的发送单元是通过正交调制产生的发送符号，使得以预定频带中的多个副载波分割信息。 OFDM解调装置包括载波频率偏移检测电路（20）。 载波频率偏移检测电路将在假设特定偏移量时将符合标准的TMCC信号，AC信号或CP信号插入的位置的子载波分割为多个组; 将相对旋转量的平方相对于复平面上的紧前的OFDM符号映射; 将正方形转换为旋转矢量; 对于每个组累积地将旋转矢量相加，从而计算累积加法结果值的绝对值; 并且将针对所有组的基于逐个基础计算的累积相加结果值的绝对值相加，从而计算加法结果绝对值，由此定义当最大加法结果值 获得绝对值作为载波频率偏移量。

    RECEIVING DEVICE, RECEIVING METHOD, AND PROGRAM
    4.
    发明公开
    RECEIVING DEVICE, RECEIVING METHOD, AND PROGRAM 审中-公开
    接收设备，接收方法和程序

    公开(公告)号：EP2696581A1

    公开(公告)日：2014-02-12

    申请号：EP12768128.6

    申请日：2012-03-29

    申请人： Sony Corporation

    发明人： TAKAHASHI, Hiroo ,  GOTO, Yuken ,  OKAMOTO, Takuya

    IPC分类号： H04N7/173 ,  H04B1/16 ,  H04H20/33 ,  H04J11/00 ,  H04N5/44

    CPC分类号： H04B1/1036 ,  H04H20/76 ,  H04H20/93 ,  H04L1/20 ,  H04L27/2655 ,  H04L27/2666 ,  H04L27/2685 ,  H04N5/4401 ,  H04N5/50 ,  H04N21/42607 ,  H04N21/6118

    摘要： Disclosed are a receiving apparatus, a receiving method, and a program capable of reliably obtaining predetermined information. In a case where a broadband signal where the same control information is arranged in different frequency bands is received and processed, a frequency where the control information is stably received is detected, and the control information is obtained again using the detected frequency. This frequency detection is performed by detecting a frequency capable of avoiding a no-signal band in a signal array of the broadband signal determined based on the obtained control information and the like. This technology can be applied to a receiving apparatus that receives a signal conforming to a DVB-C2 standard.

    摘要翻译： 公开了能够可靠地获得预定信息的接收装置，接收方法和程序。 在接收和处理在相同控制信息被布置在不同频带中的宽带信号的情况下，检测控制信息被稳定地接收的频率，并且使用检测到的频率再次获得控制信息。 通过检测能够避免基于所获得的控制信息等确定的宽带信号的信号阵列中的无信号频带的频率来执行该频率检测。 该技术可以应用于接收符合DVB-C2标准的信号的接收装置。