公开(公告)号：US20080304587A1

公开(公告)日：2008-12-11

申请号：US11793527

申请日：2005-12-21

申请人： Koji Setoh ,  Ippei Kanno ,  Akira Kisoda ,  Daisuke Hayashi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Noritaka Iguchi

发明人： Koji Setoh ,  Ippei Kanno ,  Akira Kisoda ,  Daisuke Hayashi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Noritaka Iguchi

IPC分类号： H04L27/28 ,  H04L27/06 ,  H04L25/08 ,  H03D1/06

CPC分类号： H04L27/2662 ,  H04L27/2678

摘要： An OFDM reception device detects a time at which impulse noise occurs in a received OFDM signal, and specifies a start position candidate period that does not have intersymbol interference and is estimated to have a guard interval signal in a symbol. When setting a FFT window of an effective symbol length in a symbol duration of each symbol, if the impulse noise occurrence time is included in the symbol, the OFDM reception device determines a start position of the FFT window within a range of the start position candidate period so as to exclude the impulse noise occurrence time as much as possible.

摘要翻译： OFDM接收装置检测接收的OFDM信号中出现脉冲噪声的时间，并指定不具有码间干扰的开始位置候补周期，并且估计出具有符号中的保护间隔信号。 当在每个符号的符号持续时间中设置有效符号长度的FFT窗口时，如果脉冲噪声发生时间包括在符号中，则OFDM接收装置在开始位置候选的范围内确定FFT窗口的开始位置 以便尽可能地排除脉冲噪声发生时间。

公开(公告)号：US07991058B2

公开(公告)日：2011-08-02

申请号：US11793527

申请日：2005-12-21

申请人： Koji Setoh ,  Ippei Kanno ,  Akira Kisoda ,  Daisuke Hayashi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Noritaka Iguchi

发明人： Koji Setoh ,  Ippei Kanno ,  Akira Kisoda ,  Daisuke Hayashi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Noritaka Iguchi

IPC分类号： H04L27/28

CPC分类号： H04L27/2662 ,  H04L27/2678

摘要： An OFDM reception device detects a time at which impulse noise occurs in a received OFDM signal, and specifies a start position candidate period that does not have intersymbol interference and is estimated to have a guard interval signal in a symbol. When setting a FFT window of an effective symbol length in a symbol duration of each symbol, if the impulse noise occurrence time is included in the symbol, the OFDM reception device determines a start position of the FFT window within a range of the start position candidate period so as to exclude the impulse noise occurrence time as much as possible.

摘要翻译： OFDM接收装置检测接收的OFDM信号中出现脉冲噪声的时间，并指定不具有码间干扰的开始位置候补周期，并且估计出具有符号中的保护间隔信号。 当在每个符号的符号持续时间中设置有效符号长度的FFT窗口时，如果脉冲噪声发生时间包括在符号中，则OFDM接收装置在开始位置候选的范围内确定FFT窗口的开始位置 以便尽可能地排除脉冲噪声发生时间。

公开(公告)号：US07466645B2

公开(公告)日：2008-12-16

申请号：US11302872

申请日：2005-12-14

申请人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

发明人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

IPC分类号： H04J11/00

CPC分类号： H04L27/265 ,  H04B7/0845 ,  H04L27/2633

摘要： Disclosed is an OFDM signal receiving apparatus for diversity reception, with a plurality of antennas, of an OFDM signal containing Y sub-carriers, where 2X−1 1. The OFDM signal receiving apparatus includes a plurality of receiving systems, and a diversity processing unit connected to the receiving systems and fed with sequences of data on sub-carriers demodulated by the respective receiving systems. At least one of the receiving systems includes an FFT circuit for Fast Fourier transforming, in parallel, only a sequence of data on 2Z sub-carriers contained in the OFDM signal received with a corresponding antenna, where X>Z. The diversity processing unit performs a diversity process on sequences of data on sub-carriers, out of all the Y sub-carries, redundantly demodulated.

摘要翻译： 公开了一种OFDM信号接收装置，用于分集接收包含Y个子载波的OFDM信号的多个天线，其中2X-1 1。 OFDM信号接收装置包括多个接收系统，以及连接到接收系统的分集处理单元，并且馈送有由各个接收系统解调的子载波上的数据序列。 接收系统中的至少一个包括用于快速傅里叶变换的FFT电路，其中并行地仅包含用相应天线接收的OFDM信号中包含的2Z子载波上的数据序列，其中X> Z。 在所有Y子载波中，分集处理单元对子载波上的数据序列执行分集处理，被冗余地解调。

公开(公告)号：US20060146693A1

公开(公告)日：2006-07-06

申请号：US11302872

申请日：2005-12-14

申请人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

发明人： Ryosuke Mori ,  Koji Setoh ,  Daisuke Hayashi ,  Tetsuya Yagi ,  Noritaka Iguchi ,  Akira Kisoda ,  Sadashi Kageyama

IPC分类号： H04Q7/00 ,  H04Q7/24 ,  H04J11/00

CPC分类号： H04L27/265 ,  H04B7/0845 ,  H04L27/2633

摘要： Disclosed is an OFDM signal receiving apparatus for diversity reception, with a plurality of antennas, of an OFDM signal containing Y sub-carriers, where 2X−1 1. The OFDM signal receiving apparatus includes a plurality of receiving systems, and a diversity processing unit connected to the receiving systems and fed with sequences of data on sub-carriers demodulated by the respective receiving systems. At least one of the receiving systems includes an FFT circuit for Fast Fourier transforming, in parallel, only a sequence of data on 2Z sub-carriers contained in the OFDM signal received with a corresponding antenna, where X>Z. The diversity processing unit performs a diversity process on sequences of data on sub-carriers, out of all the Y sub-carries, redundantly demodulated.

摘要翻译： 公开了一种OFDM信号接收装置，用于分集接收包含Y个子载波的OFDM信号的多个天线，其中，2个X-1 和X> 1。 OFDM信号接收装置包括多个接收系统，以及连接到接收系统的分集处理单元，并且馈送有由各个接收系统解调的子载波上的数据序列。 至少一个接收系统包括用于快速傅里叶变换的FFT电路，其并行地仅包含在用相应的天线接收的OFDM信号中的2个子载波上的数据序列，其中X > Z。 在所有Y子载波中，分集处理单元对子载波上的数据序列执行分集处理，被冗余地解调。

公开(公告)号：US20070281757A1

公开(公告)日：2007-12-06

申请号：US10588270

申请日：2005-12-02

申请人： Noritaka Iguchi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Koji Setoh ,  Daisuke Hayashi ,  Ippei Kanno

发明人： Noritaka Iguchi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Koji Setoh ,  Daisuke Hayashi ,  Ippei Kanno

IPC分类号： H04B1/16 ,  H04L1/00 ,  H04N5/44

CPC分类号： H04L1/0057 ,  H04L1/0045 ,  H04L1/0064 ,  H04N5/4401 ,  H04N21/4382 ,  H04N21/4436 ,  H04N21/64315 ,  H04W52/0229 ,  H04W52/0274 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/168

摘要： A receiving device performs reception in a service period of a broadcast signal and switches to a power saving mode in a non-service period. The service period is composed of a first period during which an application data table of an MPE-FEC frame is transmitted and a second period, following the first period, during which an RS data table of the MPE-FEC frame is transmitted. An error correction unit 12 performs one of error correction that uses the whole RS data table according to MPE-FEC, and erasure correction that uses a same number of parity bytes as bytes having bit errors. When the bit errors are corrected by the error correction unit 12 performing erasure correction, a power control unit 30 switches a receiving circuit to a power saving mode before the second period ends.

摘要翻译： 接收装置在广播信号的服务期间进行接收，并在非服务期间切换到省电模式。 服务周期由发送MPE-FEC帧的应用数据表的第一周期和在第一周期之后的第二周期组成，在该周期期间发送MPE-FEC帧的RS数据表。 错误校正单元12执行根据MPE-FEC使用整个RS数据表的纠错中的一种，以及使用与具有位错误的字节相同数量的奇偶校验字节的擦除校正。 当错误校正单元12执行擦除校正来校正位错误时，功率控制单元30在第二周期结束之前将接收电路切换到省电模式。

公开(公告)号：US07865218B2

公开(公告)日：2011-01-04

申请号：US10588270

申请日：2005-12-02

申请人： Noritaka Iguchi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Koji Setoh ,  Daisuke Hayashi ,  Ippei Kanno

发明人： Noritaka Iguchi ,  Ryosuke Mori ,  Tetsuya Yagi ,  Koji Setoh ,  Daisuke Hayashi ,  Ippei Kanno

IPC分类号： H04B1/38

CPC分类号： H04L1/0057 ,  H04L1/0045 ,  H04L1/0064 ,  H04N5/4401 ,  H04N21/4382 ,  H04N21/4436 ,  H04N21/64315 ,  H04W52/0229 ,  H04W52/0274 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/168

摘要： A receiving device performs reception in a service period of a broadcast signal and switches to a power saving mode in a non-service period. The service period is composed of a first period during which an application data table of an MPE-FEC frame is transmitted and a second period, following the first period, during which an RS data table of the MPE-FEC frame is transmitted. An error correction unit 12 performs one of error correction that uses the whole RS data table according to MPE-FEC, and erasure correction that uses a same number of parity bytes as bytes having bit errors. When the bit errors are corrected by the error correction unit 12 performing erasure correction, a power control unit 30 switches a receiving circuit to a power saving mode before the second period ends.

摘要翻译： 接收装置在广播信号的服务期间进行接收，并在非服务期间切换到省电模式。 服务周期由发送MPE-FEC帧的应用数据表的第一周期和在第一周期之后的第二周期组成，在该周期期间发送MPE-FEC帧的RS数据表。 错误校正单元12执行根据MPE-FEC使用整个RS数据表的纠错中的一种，以及使用与具有位错误的字节相同数量的奇偶校验字节的擦除校正。 当错误校正单元12执行擦除校正来校正位错误时，功率控制单元30在第二周期结束之前将接收电路切换到省电模式。

公开(公告)号：US07715886B2

公开(公告)日：2010-05-11

申请号：US11579736

申请日：2005-05-11

申请人： Ippei Kanno ,  Ryosuke Mori ,  Daisuke Hayashi ,  Kouji Setoh ,  Tetsuya Yagi ,  Noritaka Iguchi

发明人： Ippei Kanno ,  Ryosuke Mori ,  Daisuke Hayashi ,  Kouji Setoh ,  Tetsuya Yagi ,  Noritaka Iguchi

IPC分类号： H04B7/212 ,  H04B1/16 ,  H04L27/00 ,  H03D3/18

CPC分类号： H04W52/0241 ,  H04B1/1615 ,  Y02D70/168 ,  Y02D70/26 ,  Y02D70/40

摘要： The present invention aims to provide a reception apparatus that receives and demodulates a signal transmitted by using time-division multiplexing, with reduced power consumption. In detail, a receiving unit including a tuner operates to receive a signal only during a time period for which a desired signal is transmitted. The received signal is converted into digital data, and the digital data is stored into a memory. With the use of the digital data stored in the memory, a PLL performs all of the necessary operations from synchronization establishment to demodulation.

摘要翻译： 本发明旨在提供一种接收装置，其以降低的功耗来接收和解调使用时分多路传输的信号。 详细地说，包括调谐器的接收单元仅在期望的信号被发送的时间周期内接收信号。 接收到的信号被转换为数字数据，数字数据被存储到存储器中。 通过使用存储在存储器中的数字数据，PLL执行从同步建立到解调的所有必要操作。

公开(公告)号：US20070217356A1

公开(公告)日：2007-09-20

申请号：US11579736

申请日：2005-05-11

申请人： Ippei Kanno ,  Ryosuke Mori ,  Daisuke Hayashi ,  Kouji Setoh ,  Tetsuyu Yagi ,  Noritaka Iguchi

发明人： Ippei Kanno ,  Ryosuke Mori ,  Daisuke Hayashi ,  Kouji Setoh ,  Tetsuyu Yagi ,  Noritaka Iguchi

IPC分类号： H04Q7/00

CPC分类号： H04W52/0241 ,  H04B1/1615 ,  Y02D70/168 ,  Y02D70/26 ,  Y02D70/40

摘要： The present invention aims to provide a reception apparatus that receives and demodulates a signal transmitted by using time-division multiplexing, with reduced power consumption. In detail, a receiving unit including a tuner operates to receive a signal only during a time period for which a desired signal is transmitted. The received signal is converted into digital data, and the digital data is stored into a memory. With the use of the digital data stored in the memory, a PLL performs all of the necessary operations from synchronization establishment to demodulation.

摘要翻译： 本发明旨在提供一种接收装置，其以降低的功耗来接收和解调使用时分多路传输的信号。 详细地说，包括调谐器的接收单元仅在期望的信号被发送的时间周期内接收信号。 接收到的信号被转换为数字数据，数字数据被存储到存储器中。 通过使用存储在存储器中的数字数据，PLL执行从同步建立到解调的所有必要操作。

公开(公告)号：US5535220A

公开(公告)日：1996-07-09

申请号：US182830

申请日：1994-01-19

申请人： Ippei Kanno ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Daisuke Hayashi ,  Todd S. Bowser

发明人： Ippei Kanno ,  Seiji Sakashita ,  Hiroaki Ozeki ,  Daisuke Hayashi ,  Todd S. Bowser

IPC分类号： H03M13/23 ,  H03M13/27 ,  H03M13/33 ,  H04L1/00 ,  H04L7/04 ,  H04L27/00 ,  H04L27/18 ,  G06F11/00

CPC分类号： H04L1/0071 ,  H03M13/271 ,  H03M13/276 ,  H03M13/33 ,  H04L1/0042 ,  H04L1/0054 ,  H04L7/048

摘要： A forward error correcting transmitter and receiver for preventing the erroneous detection of synchronization is provided in a system in which synchronization of an interleaver circuit and a deinterleaver circuit, to be inserted between a convolutional encoder and a Viterbi decoder, is obtained from a synchronization detecting circuit of the Viterbi decoder. A LFSR (Linear Feedback Shift Register) is used as a row-direction address counter during writing and an up/down counter is used as a column-direction address counter during reading, during the interleaver circuit. In the deinterleaver circuit, an up/down counter is used as the column-direction address counter during writing, and an LFSR is used as the row-direction address counter during reading.

摘要翻译： 在从同步检测电路获得插入卷积编码器和维特比译码器之间的交错器电路和去交织器电路的同步的系统中，提供了用于防止同步错误检测的前向纠错发送器和接收器 的维特比解码器。 在写入期间，LFSR（线性反馈移位寄存器）用作行方向地址计数器，并且在交织器电路期间，在读取期间将升/降计数器用作列方向地址计数器。 在去交错电路中，在写入期间使用升/减计数器作为列方向地址计数器，在读取期间使用LFSR作为行方向地址计数器。

公开(公告)号：US5398080A

公开(公告)日：1995-03-14

申请号：US70751

申请日：1993-06-03

申请人： Seiji Sakashita ,  Hiroaki Ozeki ,  Ippei Kanno ,  Daisuke Hayashi

发明人： Seiji Sakashita ,  Hiroaki Ozeki ,  Ippei Kanno ,  Daisuke Hayashi

IPC分类号： H03D7/18 ,  H03B1/00 ,  H03B5/18 ,  H03D3/00 ,  H03D7/16 ,  H04N5/50

CPC分类号： H04N5/4446 ,  H03D3/007 ,  H03D7/165 ,  H03B2201/0208 ,  H03B5/1805 ,  H03D7/18

摘要： In a television receiver in which image frequency signals for desired signals are removed when television broadcasting signals are frequency-converted through a local oscillator and mixers, the local oscillator generates biaxial orthogonal signals to be frequency-converted by respective mixers, an output signal of one mixer being phase-shifted to be added to an output signal of the other mixer so as to thereby offset only the image frequency signals. The local oscillator and a phase shifter operate so as to follow the frequency change of the intermediate frequency signal so as to thereby stabilize the suppression of the image frequency signal.

摘要翻译： 在电视接收机中，当电视广播信号通过本地振荡器和混频器进行频率转换时，所需信号的图像频率信号被去除，本地振荡器产生双轴正交信号，由各个混频器进行频率转换，输出信号为1 混频器被相移以被添加到另一个混频器的输出信号，从而仅偏移图像频率信号。 本地振荡器和移相器工作以跟随中频信号的频率变化，从而稳定图像频率信号的抑制。