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    • 5. 发明授权
    • Signal processing apparatus, signal processing method, and reception system
    • 信号处理装置,信号处理方法和接收系统
    • US08358722B2
    • 2013-01-22
    • US12833409
    • 2010-07-09
    • Tadaaki YubaTakuya OkamotoYuken GotoKenichi Kobayashi
    • Tadaaki YubaTakuya OkamotoYuken GotoKenichi Kobayashi
    • H04L27/06
    • H04L27/2675H04L27/2613H04L27/2659H04L27/2666H04L27/2672H04L27/2682H04L27/2685
    • Disclosed herein is a signal processing apparatus including a processing block configured to perform a carrier shift amount detection process for detecting a carrier shift amount constituting a carrier error used for demodulating an orthogonal frequency division multiplexing signal known as the OFDM signal; and a correction block configured to correct the OFDM signal in accordance with the carrier shift amount. The OFDM signal includes a first preamble signal including subcarriers, and a second preamble signal including subcarriers of which the spacing is narrower than the spacing of the subcarriers included in the first preamble signal. The second preamble signal includes pilot signals which are known signals located at intervals of a predetermined number of subcarriers. The processing block detects the carrier shift amount using a correlation of the subcarriers included in one such second preamble signal.
    • 这里公开了一种信号处理装置,包括:处理块,被配置为执行用于检测构成用于解调称为OFDM信号的正交频分复用信号的载波误差的载波移位量的载波移位量检测处理; 以及校正块,被配置为根据载波移位量校正OFDM信号。 OFDM信号包括包括子载波的第一前导码信号和包括间隔窄于包括在第一前导信号中的子载波的间隔的子载波的第二前导码信号。 第二前导信号包括作为以预定数量的副载波间隔设置的已知信号的导频信号。 处理块使用包括在一个这样的第二前导信号中的子载波的相关性来检测载波移位量。
    • 10. 发明申请
    • RECEIVING APPARATUS AND METHOD AND PROGRAM
    • 接收装置和方法与程序
    • US20110019101A1
    • 2011-01-27
    • US12836667
    • 2010-07-15
    • Yuken GOTOKenichi KobayashiSuguru Houchi
    • Yuken GOTOKenichi KobayashiSuguru Houchi
    • H04N5/44
    • H04L27/2659H04L27/266H04L27/2666H04L27/2675H04L27/2685H04L2025/03414H04L2027/0053H04L2027/0071H04L2027/0095
    • Disclosed herein is a receiving apparatus including a preamble analyzer configured to receive a frame of DVB-T2 made up of an OFDM signal and analyze a preamble contained in the received frame; an offset detector configured to detect a fine offset and a coarse offset on the basis of the analyzed preamble; a carrier frequency corrector configured to execute carrier frequency correction on an OFDM time domain signal obtained by quadrature demodulation on the basis of the detected fine offset and the detected coarse offset; a determiner configured to determine whether the detection of the coarse offset has been completed; and a control signal outputter configured, if the detection of the coarse offset is determined to be completed, to output a control signal for feeding back the fine offset detected on the basis of an OFDM frequency domain signal obtained by FFT computation to the carrier frequency corrector.
    • 本文公开了一种接收装置,包括:前置码分析器,被配置为接收由OFDM信号构成的DVB-T2帧,并分析接收帧中包含的前同步码; 偏移检测器,被配置为基于所分析的前导码来检测精细偏移和粗略偏移; 载波频率校正器,被配置为基于所检测到的精细偏移和检测到的粗略偏移,对通过正交解调获得的OFDM时域信号执行载波频率校正; 确定器,被配置为确定所述粗略偏移的检测是否已经完成; 以及控制信号输出器,被配置为如果粗略偏移的检测被确定为完成,则输出用于将基于通过FFT计算获得的OFDM频域信号检测到的精细偏移反馈到载波频率校正器的控制信号 。