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1. 发明授权

US5920228A Digital demodulation with compensation for phase and frequency of tentatively demodulated signal 失效
标题翻译：数字解调补偿相位和频率暂时解调信号
公开(公告)号：US5920228A
公开(公告)日：1999-07-06
申请号：US895093
申请日：1997-07-16
申请人： Shigeru Soga , Daisuke Hayashi , Takaya Hayashi , Seiji Sakashita
发明人： Shigeru Soga , Daisuke Hayashi , Takaya Hayashi , Seiji Sakashita
IPC分类号： H04L27/38 , H04L27/22
CPC分类号： H04L27/3872
摘要： A demodulation method for tentatively demodulating a modulated input signal by a signal having a fixed frequency to form a tentative complex demodulated signal and then generating a determined complex demodulated signal from the tentative complex demodulated signal. The method includes step (a) of obtaining a determined complex demodulated signal by compensating for the tentative complex demodulated signal based on an optimum phase compensation amount; step (b) of estimating an optimum frequency compensation amount based on a shift in the optimum phase compensation amount during a predetermined cycle; and step (c) of estimating an immediately subsequent optimum phase compensation amount to be used in the steps (a) and (b) performed in repetition, based on the tentative complex demodulated signal, the determined complex demodulated signal, and the optimum frequency compensation amount.
摘要翻译：一种用于通过具有固定频率的信号暂时解调调制输入信号以形成暂定复数解调信号，然后从暂定复数解调信号产生确定的复解调信号的解调方法。该方法包括步骤（a），通过基于最佳相位补偿量补偿暂定复数解调信号来获得确定的复解调信号; 步骤（b），基于在预定周期内的最佳相位补偿量的偏移来估计最佳频率补偿量; 以及步骤（c），基于暂定复合解调信号，所确定的复解调信号和最佳频率补偿来估计在重复执行的步骤（a）和（b）中将要使用的紧随其后的最佳相位补偿量量。

2. 发明授权

US06421378B1 Signal waveform equalizer apparatus 有权
标题翻译：信号波形均衡器
公开(公告)号：US06421378B1
公开(公告)日：2002-07-16
申请号：US09165204
申请日：1998-10-02
申请人： Toshihiko Fukuoka , Daisuke Hayashi , Takaya Hayashi , Shigeru Soga
发明人： Toshihiko Fukuoka , Daisuke Hayashi , Takaya Hayashi , Shigeru Soga
IPC分类号： H03H730
CPC分类号： H04B7/005
摘要： Integrating AFC/APC function with waveform equalization function for and reducing the circuit size of a signal wave-form equalizer apparatus. A waveform equalization section is divided into an FFE block as an anterior stage and a DFE block as a posterior stage. An AFC/APC block is provided therebetween. In the AFC/APC block, an AFC/APC coefficient update section updates a coefficient used for removing frequency and phase errors in accordance with an LMS algorithm, and a tap multiplies a modulated signal by the updated coefficient. Error data produced by an error estimation block is used by not only FFE and DFE coefficient update sections but also the AFC/APC coefficient update section for updating the coefficients. That is to say, the waveform equalization section and the AFC/APC block use the error estimation block in common, thereby reducing the circuit size considerably.
摘要翻译：将AFC / APC功能与波形均衡功能集成，减少信号波形均衡器的电路尺寸。波形均衡部分被分为作为前级的FFE块和作为后级的DFE块。在它们之间提供AFC / APC块。在AFC / APC块中，AFC / APC系数更新部根据LMS算法更新用于去除频率和相位误差的系数，并且通过更新的系数将调制信号与调制信号相乘。由误差估计块产生的误差数据不仅用于FFE和DFE系数更新部分，而且还用于更新系数的AFC / APC系数更新部分。也就是说，波形均衡部分和AFC / APC块共同使用误差估计块，从而显着地减小了电路尺寸。

3. 发明申请

US20090052564A1 RECEIVING APPARATUS AND RECEIVING METHOD 失效
标题翻译：接收装置和接收方法
公开(公告)号：US20090052564A1
公开(公告)日：2009-02-26
申请号：US12193197
申请日：2008-08-18
申请人： Takaya Hayashi , Kenichiro Hayashi , Tetsuya Yagi
发明人： Takaya Hayashi , Kenichiro Hayashi , Tetsuya Yagi
IPC分类号： H04L27/28
CPC分类号： H04L25/0232 , H04L1/0047 , H04L25/067 , H04L27/2649
摘要： An average power indicating channel characteristics is outputted from a reference value calculation unit as a reference value. An interference level corresponding to the degree of influence by frequency selective interference is outputted from an interference detection unit. A reliability determination unit determines a carrier that has been subjected to interference on the basis of the reference value and the interference level, to decide a reliability level. An error correction unit performs error correction of a demodulation signal on the basis of the reliability level.
摘要翻译：从参考值计算单元输出平均功率指示通道特性作为参考值。从干扰检测单元输出与频率选择干扰的影响程度对应的干扰电平。可靠性确定单元基于参考值和干扰电平来确定已经受到干扰的载波，以确定可靠性水平。误差校正单元基于可靠性水平执行解调信号的纠错。

4. 发明授权

US07436759B2 Reception apparatus and method, and channel response measurement apparatus for receiving an orthogonal frequency divisional multiplexing signal 有权
标题翻译：接收装置和方法以及用于接收正交频分复用信号的信道响应测量装置
公开(公告)号：US07436759B2
公开(公告)日：2008-10-14
申请号：US10514818
申请日：2003-05-16
申请人： Takaya Hayashi , Kenichiro Hayashi , Takehiro Kamada
发明人： Takaya Hayashi , Kenichiro Hayashi , Takehiro Kamada
IPC分类号： H04J11/00 , H04J1/00 , H04L7/04
CPC分类号： H04L25/0222 , H04L5/0048 , H04L25/022 , H04L25/0232 , H04L25/03159 , H04L27/2647
摘要： A reception apparatus for receiving an OFDM signal having a plurality of pilot carriers that transmit predetermined pilot signals at predetermined symbols. The reception apparatus transforms the received OFDM signal to a frequency-domain OFDM signal, determines channel responses corresponding to the transmitted pilot signals for each of the pilot carriers among a plurality of carriers constituting the frequency-domain OFDM signal, determines, based on channel responses corresponding to first, second and third pilot signals transmitted sequentially in a same carrier, a channel response at a symbol between the second pilot signal and the third pilot signal, compensates a waveform distortion in the frequency-domain OFDM signal according to the channel response at the symbol between the second pilot signal and the third pilot signal and outputs the results.
摘要翻译：一种用于接收具有以预定符号发送预定导频信号的多个导频载波的OFDM信号的接收装置。接收装置将接收的OFDM信号变换为频域OFDM信号，根据信道响应确定构成频域OFDM信号的多个载波中的每个导频载波对应于所发送的导频信号的信道响应对应于在相同载波中顺序发送的第一，第二和第三导频信号，在第二导频信号和第三导频信号之间的符号处的信道响应，根据信道响应在频域OFDM信号中补偿波形失真第二导频信号和第三导频信号之间的符号，并输出结果。

5. 发明申请

US20100275102A1 SIGNAL DEMODULATING DEVICE, SIGNAL DEMODULATING METHOD, SEMICONDUCTOR INTEGRATED CIRCUIT, AND RECEIVING APPARATUS 审中-公开
标题翻译：信号解调装置，信号解调方法，半导体集成电路和接收装置
公开(公告)号：US20100275102A1
公开(公告)日：2010-10-28
申请号：US12682407
申请日：2008-10-28
申请人： Tetsuya Yagi , Takaya Hayashi , Kenichiro Hayashi , Tomohiro Kimura
发明人： Tetsuya Yagi , Takaya Hayashi , Kenichiro Hayashi , Tomohiro Kimura
IPC分类号： H03M13/05 , G06F11/10
CPC分类号： H04L25/03159 , H04L1/0045 , H04L27/2656
摘要： There is provided a signal demodulating device, including: a time frequency converting unit (6) for converting a frequency division multiplexing signal on a time axis into a signal on a frequency axis to output a data carrier, a pilot carrier, and a transmission control carrier; an equalizer (7) for equalizing the data carrier and the transmission control carrier according to a characteristic value of a transmission line obtained from the pilot carrier to output an equalized data carrier and an equalized transmission control carrier; a first decoding unit (9) for decoding the equalized transmission control carrier; and a first correcting unit (10) for performing first error-correction on an output of said first decoding unit (9) to output first control information and a first decoding flag that indicates a status of the first error-correction.
摘要翻译：提供了一种信号解调装置，包括：时间频率转换单元（6），用于将时间轴上的频分复用信号转换为频率轴上的信号，以输出数据载波，导频载波和传输控制载体均衡器（7），用于根据从导频载波获得的传输线的特性值来均衡数据载波和传输控制载波，以输出均衡的数据载体和均衡的传输控制载体; 用于解码均衡的传输控制载体的第一解码单元（9）以及用于对所述第一解码单元（9）的输出执行第一纠错以输出第一控制信息的第一校正单元（10）和指示第一错误校正的状态的第一解码标志。

6. 发明授权

US07519122B2 OFDM reception apparatus and OFDM reception method 失效
标题翻译： OFDM接收装置和OFDM接收方法
公开(公告)号：US07519122B2
公开(公告)日：2009-04-14
申请号：US10570769
申请日：2005-05-09
申请人： Takaya Hayashi
发明人： Takaya Hayashi
IPC分类号： H04K1/10 , H04B1/10
CPC分类号： H04L25/03159 , H04L25/0232 , H04L2025/03414
摘要： Precision of channel estimation is improved. An OFDM reception apparatus for receiving and demodulating an OFDM signal which transmits a pilot signal, comprises a channel estimation section for calculating a channel response before interpolation by performing computation between a frequency-domain OFDM signal and the pilot signal, performing interpolation with respect to the before-interpolation channel response using a plurality of filters having different characteristics from each other, and outputting a plurality of interpolated channel responses based on respective results of the interpolation obtained by the plurality of filters, an equalization section for performing waveform equalization with respect to the frequency-domain OFDM signal based on the plurality of interpolated channel responses, and outputting a plurality of demodulated signals based on respective results of the waveform equalization corresponding to the plurality of interpolated channel responses, a determination section for determining one having best quality from the plurality of demodulated signals, and outputting a result of the determination, and a selection section for selecting and outputting one of the plurality of demodulated signals in accordance with the determination result.
摘要翻译：信道估计精度提高。一种用于接收和解调发送导频信号的OFDM信号的OFDM接收装置，包括：信道估计部，用于通过在频域OFDM信号与导频信号之间进行运算来计算插值前的信道响应，进行相对于使用具有彼此不同特性的多个滤波器的插值前信道响应，并且基于由多个滤波器获得的插值的相应结果来输出多个内插信道响应;均衡部分，用于执行相对于基于所述多个内插信道响应的频域OFDM信号，并且基于与所述多个内插信道响应相对应的波形均衡的相应结果来输出多个解调信号;确定部，用于确定具有最佳质量的一个并且输出确定结果;以及选择部分，用于根据确定结果选择和输出多个解调信号中的一个。

7. 发明申请

US20080260052A1 Ofdm Reception Apparatus and Ofdm Reception Method 失效
标题翻译： OFDM接收设备和OFDM接收方法
公开(公告)号：US20080260052A1
公开(公告)日：2008-10-23
申请号：US11579810
申请日：2005-05-09
申请人： Takaya Hayashi
发明人： Takaya Hayashi
IPC分类号： H04L27/28
CPC分类号： H04L1/20 , H04L27/2608 , H04L27/2647
摘要： A degree of an influence of interference on an OFDM received signal is estimated with high precision even under various interference conditions. An OFDM reception apparatus for receiving and demodulating an OFDM signal is provided, comprising a fast Fourier transform section for converting a received OFDM signal into a frequency-domain OFDM signal, a channel response calculation section for obtaining a channel response with respect to a carrier transmitting a pilot signal, from the frequency-domain OFDM signal, an interpolation section for interpolating the channel response, and outputting the result, a power calculation section for calculating the square of a magnitude of the interpolated channel response, as a carrier power, for each carrier corresponding to the channel response, an interference calculation section for calculating a degree of an influence of interference on the received OFDM signal, as an interference power, for each carrier corresponding to the interpolated channel response, and a carrier quality calculation section for calculating a ratio of the carrier power obtained to the interference power corresponding thereto, for each carrier.
摘要翻译：即使在各种干扰条件下，也能够高精度地估计干扰对OFDM接收信号的影响程度。提供了一种用于接收和解调OFDM信号的OFDM接收装置，包括用于将接收到的OFDM信号转换为频域OFDM信号的快速傅里叶变换部分，用于获得相对于载波发送的信道响应的信道响应计算部分来自频域OFDM信号的导频信号，用于内插信道响应的内插部分，并输出结果;功率计算部分，用于计算内插信道响应的幅度的平方，作为载波功率，对于每个载波对应于信道响应的载波;干扰计算部分，用于针对对应于内插信道响应的每个载波，将接收的OFDM信号的干扰影响程度用作干扰功率;以及载波质量计算部分，所获得的载波功率与干扰功率的比率相对应对于每个载体。

8. 发明申请

US20070230329A1 Ofdm Reception Apparatus and Ofdm Reception Method 有权
标题翻译： OFDM接收设备和OFDM接收方法
公开(公告)号：US20070230329A1
公开(公告)日：2007-10-04
申请号：US11596045
申请日：2005-05-11
申请人： Takaya Hayashi , Tomohiko Taniguchi
发明人： Takaya Hayashi , Tomohiko Taniguchi
IPC分类号： H04J11/00
CPC分类号： H04L27/0012 , H04L25/03159 , H04L27/2647 , H04L2025/03414
摘要： A time from the start of a reception operation to the output of video, audio or the like is shortened. An OFDM reception apparatus is provided for receiving an OFDM signal composed of a plurality of carriers, comprising a fast Fourier transform section for converting a received time-domain OFDM signal into a frequency-domain OFDM signal, an equalization section for performing waveform equalization with respect to the frequency-domain OFDM signal, and outputting the waveform-equalized OFDM signal, and a modulation scheme estimating section for estimating a modulation scheme for a plurality of carriers constituting the waveform-equalized OFDM signal based on signal points of the plurality of carriers, and outputting an obtained estimation result. The OFDM reception apparatus performs a process for obtaining transmitted information with respect to the received OFDM signal, depending on the estimation result.
摘要翻译：从接收操作开始到视频，音频等的输出的时间缩短。提供一种OFDM接收装置，用于接收由多个载波组成的OFDM信号，包括用于将接收到的时域OFDM信号转换为频域OFDM信号的快速傅里叶变换部分，用于执行波形均衡的均衡部分并且输出波形均衡的OFDM信号，以及调制方式估计部，用于基于多个载波的信号点估计构成波形均衡的OFDM信号的多个载波的调制方式，并输出所获得的估计结果。 OFDM接收装置根据估计结果执行用于获得关于接收的OFDM信号的发送信息的处理。

9. 发明申请

US20110268172A1 RECEIVER APPARATUS AND RECEIVING METHOD 审中-公开
标题翻译：接收装置和接收方法
公开(公告)号：US20110268172A1
公开(公告)日：2011-11-03
申请号：US13129457
申请日：2009-12-09
申请人： Takaya Hayashi , Tetsuya Yagi
发明人： Takaya Hayashi , Tetsuya Yagi
IPC分类号： H04L27/00 , H04B1/18
CPC分类号： H04L27/2647
摘要： There is disclosed a receiver apparatus that can receive OFDM signals. The apparatus comprises: an FFT unit for transforming signals inputted to the apparatus into frequency-domain signals, thereby outputting the transformed signals on a complex symbol-by-complex symbol basis; correlation-calculating units each of which calculates an index indicating a correlation between complex symbols in a respective one of a plurality of groups, each of the plurality groups being a set of a plurality of complex symbols separated from each other by an interval in which a pilot signal is inserted, the groups being selected such that the complex symbols constituting the groups differing from each other; and a judging unit for determining, based on the calculated index for each group, whether or not any index satisfying a predetermined condition is existent, thereby outputting a result of the judgment.
摘要翻译：公开了一种可以接收OFDM信号的接收机装置。该装置包括：FFT单元，用于将输入到该装置的信号变换为频域信号，从而以复数个符号为单位的符号输出变换的信号; 相关计算单元，其各自计算指示多个组中的相应一个组中的复数符号之间的相关性的指标，所述多个组中的每个组是多个复数符号的集合，所述多个复数符号彼此分开一段间隔，插入导频信号，选择组，使得构成组的复数符号彼此不同; 以及判断单元，用于基于所计算出的每个组的索引来确定是否存在满足预定条件的任何索引，从而输出判断结果。

10. 发明申请

US20100027724A1 RECEIVER AND RECEIVING METHOD 审中-公开
标题翻译：接收和接收方法
公开(公告)号：US20100027724A1
公开(公告)日：2010-02-04
申请号：US12526606
申请日：2008-03-28
申请人： Takaya Hayashi , Tetsuya Yagi
发明人： Takaya Hayashi , Tetsuya Yagi
IPC分类号： H04L27/06
CPC分类号： H04L27/2666 , H04L27/2655 , H04L27/2676
摘要： Quick resumption of reproduction of received data is achieved with low cost. A receiver for receiving an OFDM signal has a demodulation unit and a transmission mode control unit. The demodulation unit performs, on a received signal, demodulation and detection of establishment of synchronization in accordance with a transmission mode that is a combination of an FFT mode and a guard interval, and outputs a synchronization establishment signal indicating an obtained result of the detection of establishment of synchronization. The transmission mode control unit holds an FFT mode and a guard interval adopted when the synchronization establishment signal indicates establishment of synchronization, and outputs a combination of the held FFT mode and the held guard interval as the transmission mode to be used in the demodulation unit.
摘要翻译：以低成本实现快速恢复接收数据的再现。用于接收OFDM信号的接收机具有解调单元和发送模式控制单元。解调单元根据作为FFT模式和保护间隔的组合的传输模式，对接收到的信号进行解调和同步建立的检测，并且输出表示获得的检测结果的同步建立信号建立同步传输模式控制单元保持同步建立信号指示同步建立时所采用的FFT模式和保护间隔，并且将保持的FFT模式和保持的保护间隔的组合作为要在解调单元中使用的传输模式输出。

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