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11. 发明申请

US20050253742A1 Timing extractor, timing extraction method, and demodulator having the timing extractor 失效
标题翻译：定时提取器，定时提取方法和具有定时提取器的解调器
公开(公告)号：US20050253742A1
公开(公告)日：2005-11-17
申请号：US10520616
申请日：2004-06-07
申请人： Shigeru Soga
发明人： Shigeru Soga
IPC分类号： H04L7/027 , H04L27/227 , H03M7/04 , H03M7/12
CPC分类号： H04L7/027 , H04L7/007 , H04L27/2276
摘要： In a timing component extractor for a digital modulated signal, a frequency converting section 30 receives a complex baseband signal having a symbol rate fs and formed from an I signal and a Q signal, and converts frequency components ±fs/2, which are present in the complex baseband signal as the data changes, to frequency components ±fs/4. The I signal and Q signal of the complex baseband signal are then nonlinearly processed. In other words, multipliers 31, 32 square the I signal and the Q signal, respectively, and an adder 33 adds the respective results of the multipliers 31, 32. A BPF 34 extracts the frequency components ±fs/2 from the output of the adder 33, and outputs the extracted frequency components ±fs/2 as a timing signal. Accordingly, processing can be conducted at a sampling frequency which is twice the symbol rate fs. Moreover, timing extraction can be stably conducted without being affected by a carrier frequency offset.
摘要翻译：在数字调制信号的定时分量提取器中，频率转换部分30接收由I信号和Q信号形成的具有符号速率fs的复基带信号，并且将频率分量±fs / 2转换成复基带信号随数据变化，频率分量为±fs / 4。然后对复基带信号的I信号和Q信号进行非线性处理。换句话说，乘法器31,32分别对I信号和Q信号进行平方，并且加法器33将乘法器31,32的各个结果相加。 BPF34从加法器33的输出中提取频率分量±fs / 2，并将所提取的频率分量±fs / 2作为定时信号输出。因此，可以以符号率fs的两倍的采样频率进行处理。此外，可以稳定地进行定时提取而不受载波频率偏移的影响。

12. 发明申请

US20100296606A1 DIVERSITY RECEIVING APPARATUS, DIVERSITY RECEIVING METHOD, SEMICONDUCTOR INTEGRATED CIRCUIT, AND RECEIVER 审中-公开
标题翻译：多样化接收装置，多样化接收方法，半导体集成电路和接收器
公开(公告)号：US20100296606A1
公开(公告)日：2010-11-25
申请号：US12743942
申请日：2008-09-29
申请人： Shigeru Soga
发明人： Shigeru Soga
IPC分类号： H04L27/00
CPC分类号： H04B7/08 , H04L5/0007 , H04L5/0023 , H04L5/0048 , H04L5/0064 , H04L25/0224 , H04L25/03159 , H04L27/0012 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
摘要： There is provided an apparatus, comprising: a first branch (2) and a second branch (3) each for demodulating frequency division multiplexing signals; and a branch judging unit (4), wherein: the first branch (2) includes a first judging unit (10) for judging a transmission mode of the frequency division multiplexing signals, thereby outputting a first mode judgment result and a first reliability value indicating reliability of the judgment; the second branch (3) includes a second judging unit (17) for judging a transmission mode of the frequency division multiplexing signals, thereby outputting a second reliability value indicating reliability of the judgment; and the branch judging unit (4) comprises: an outputting unit (21) for outputting identity information and branch comparison information; and a selecting unit (22) for selecting one of the first mode judgment result and the second mode judgment result based on the branch comparison information.
摘要翻译：提供了一种装置，包括：第一分支（2）和第二分支（3），每个分支用于解调频分复用信号; 和分支判断单元（4），其中：第一分支（2）包括用于判断频分复用信号的传输模式的第一判断单元（10），从而输出第一模式判断结果和第一可靠性值，判断的可靠性; 第二分支（3）包括用于判断频分复用信号的发送模式的第二判断单元（17），从而输出表示判断的可靠性的第二可靠性值; 和分支判断单元（4）包括：输出单元（21），用于输出身份信息和分支比较信息; 以及用于基于分支比较信息来选择第一模式判断结果和第二模式判断结果之一的选择单元（22）。

13. 发明授权

US07456683B2 Amplitude error compensating device and quadrature skew error compensating device 失效
标题翻译：幅度误差补偿装置和正交偏移误差补偿装置
公开(公告)号：US07456683B2
公开(公告)日：2008-11-25
申请号：US11660968
申请日：2006-05-31
申请人： Haruka Takano , Shigeru Soga
发明人： Haruka Takano , Shigeru Soga
IPC分类号： H04L27/38 , H04L27/22
CPC分类号： H04L27/3863
摘要： An amplitude error compensating device comprises an amplitude correcting section for performing amplitude correction with respect to an in-phase component and a quadrature component of a complex signal obtained by quadrature demodulation, based on amplitude error information, and outputting a resultant amplitude-corrected complex signal, and an amplitude error detecting section for obtaining the amplitude error information, depending on amplitudes of an in-phase component and a quadrature component of the amplitude-corrected complex signal. The amplitude error detecting section comprises a power difference calculating section for obtaining as a power error a difference in power between the in-phase component and the quadrature component of the amplitude-corrected complex signal, a rotation detecting section for detecting a rotation of a signal point of the amplitude-corrected complex signal, an error information control section for outputting the power error when a rotation of the signal point has been detected, and 0 when a rotation of the signal point has not been detected, and a smoothing section for smoothing an output of the error information control section, and outputting the result as the amplitude error information.
摘要翻译：幅度误差补偿装置包括幅度校正部分，用于根据振幅误差信息对正交分量获得的复数信号的正交分量和正交分量进行幅度校正，并输出合成的幅度校正复信号以及幅度误差检测部分，用于根据幅度校正的复信号的同相分量和正交分量的幅度获得幅度误差信息。幅度误差检测部分包括功率差计算部分，用于获得幅度校正复信号的同相分量和正交分量之间的功率差的功率误差，用于检测信号的旋转的旋转检测部分振幅校正后的复信号的点，当检测到信号点的旋转时输出功率误差的误差信息控制部，还没有检测到信号点的旋转时的0，以及平滑化部误差信息控制部分的输出，并输出该结果作为振幅误差信息。

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