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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
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。
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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
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。
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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。
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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。
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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
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：US07929627B2
公开(公告)日：2011-04-19
申请号：US11885042
申请日：2006-02-28
申请人： Akira Kisoda , Noritaka Iguchi , Koji Setoh
发明人： Akira Kisoda , Noritaka Iguchi , Koji Setoh
IPC分类号： H04L27/28
CPC分类号： H04L25/0232
摘要： A mobile receiver performs oblique interpolation in such a direction that a symbol number increases by one and a carrier number decreases by three with respect to a position of each Scattered Pilot Signal to interpolate a first signal whose channel characteristics have not been obtained. The mobile receiver then performs, in a frequency axis direction, frequency axis interpolation to interpolate channel characteristics of a second signal whose channel characteristics have not been obtained, using the estimated channel characteristics and the interpolated channel characteristics.
摘要翻译： 移动接收机以符号数增加1的方向执行倾斜内插，并且相对于每个散射导频信号的位置减少三个载波数，以内插未获得其信道特性的第一信号。 然后，移动接收机利用估计的信道特性和内插的信道特性，在频率轴方向上进行频率轴插值来内插未获得其信道特性的第二信号的信道特性。
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公开(公告)号：US20080165871A1
公开(公告)日：2008-07-10
申请号：US11885042
申请日：2006-02-28
申请人： Akira Kisoda , Noritaka Iguchi , Koji Setoh
发明人： Akira Kisoda , Noritaka Iguchi , Koji Setoh
IPC分类号： H04L27/26
CPC分类号： H04L25/0232
摘要： To improve the reception performance of a mobile receiver for a digital broadcasting by OFDM method, the present invention focuses on the arrangement of the SP signals. The present invention performs oblique interpolation in such a direction that a symbol number increases by one and a carrier number decreases by three with respect to a position of each Scattered Pilot Signal to interpolate a first signal whose channel characteristics have not been obtained, and then performs, in a frequency axis direction, frequency axis interpolation to interpolate channel characteristics of a second signal whose channel characteristics have not been obtained, using the estimated channel characteristics and the interpolated channel characteristics.
摘要翻译： 为了通过OFDM方式提高数字广播的移动接收机的接收性能，本发明着重于SP信号的配置。 本发明在符号数增加1的方向上执行斜插补，并且相对于每个分散导频信号的位置减少三个载波，以内插未获得其信道特性的第一信号，然后执行 在频率轴方向上，使用估计的信道特性和内插的信道特性，对频道特性未获得的第二信号的信道特性进行频率插值。
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