公开(公告)号：US08238272B2

公开(公告)日：2012-08-07

申请号：US12683034

申请日：2010-01-06

申请人： Masami Aizawa

发明人： Masami Aizawa

IPC分类号： H04J1/00

CPC分类号： H04L25/03318 ,  H04L25/022 ,  H04L25/03292

摘要： A frequency division multiplex transmission signal receiving apparatus for receiving a frequency division multiplex transmission signal using a plurality of carries includes: an estimation section estimating a transfer function of a received signal after the received signal has been transformed into a frequency domain signal; a demodulation section demodulating the received signal according to the transfer function estimated by the estimation section; a plurality of variation detecting sections performing variation detection using a plurality of different variation detection methods, based on the transfer function estimated by the estimation section; a reliability determining section determining reliability based on a result of a combination of variation detection results of the plurality of variation detecting sections; and a correction section performing error correction of the demodulated signal from the demodulation section, the demodulated signal being subjected to an application of a reliability determination result of the reliability determining section.

摘要翻译： 一种用于使用多个载波接收频分多路传输信号的频分复用传输信号接收装置包括：估计部分，估计在接收信号已被变换为频域信号之后的接收信号的传递函数; 解调部，根据由所述估计部估计出的传递函数解调所述接收信号; 多个变化检测部，基于由所述估计部估计的传递函数，使用多种不同的变化检测方法进行变动检测; 可靠性判定部，基于多个变化检测部的变动检测结果的组合的结果来确定可靠性; 以及校正部分，对来自解调部分的解调信号进行纠错，对该解调信号进行可靠性确定部分的可靠性确定结果的应用。

公开(公告)号：US07826570B2

公开(公告)日：2010-11-02

申请号：US11511330

申请日：2006-08-29

申请人： Kenichi Tokoro ,  Masami Aizawa

发明人： Kenichi Tokoro ,  Masami Aizawa

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H04L1/0054 ,  H04B7/0848 ,  H04L1/0052 ,  H04L27/2647

摘要： A receiver has a plurality of synthesizers configured to synthesize signals received by N pieces of antennas by using weighted coefficients different from each other, where N is an integer of two or more, a determination part configured to determine an output signal having a minimum error among output signals of the plurality of synthesizers in units of a predetermined transmission unit, and a re-synthesis part configured to sequentially re-synthesize and output a signal determined to have the minimum error by the determination part.

摘要翻译： 接收机具有多个合成器，其被配置为通过使用彼此不同的加权系数来合成由N个天线接收的信号，其中N是2或更大的整数，确定部分被配置为确定具有最小误差的输出信号 多个合成器的输出信号以预定的传输单元为单位，以及重新合成部件，被配置为顺序地重新合成并输出由确定部分确定为具有最小误差的信号。

公开(公告)号：US20100189133A1

公开(公告)日：2010-07-29

申请号：US12683034

申请日：2010-01-06

申请人： Masami Aizawa

发明人： Masami Aizawa

IPC分类号： H04J1/00

CPC分类号： H04L25/03318 ,  H04L25/022 ,  H04L25/03292

摘要： A frequency division multiplex transmission signal receiving apparatus for receiving a frequency division multiplex transmission signal using a plurality of carries includes: an estimation section estimating a transfer function of a received signal after the received signal has been transformed into a frequency domain signal; a demodulation section demodulating the received signal according to the transfer function estimated by the estimation section; a plurality of variation detecting sections performing variation detection using a plurality of different variation detection methods, based on the transfer function estimated by the estimation section; a reliability determining section determining reliability based on a result of a combination of variation detection results of the plurality of variation detecting sections; and a correction section performing error correction of the demodulated signal from the demodulation section, the demodulated signal being subjected to an application of a reliability determination result of the reliability determining section.

摘要翻译： 一种用于使用多个载波接收频分多路传输信号的频分复用传输信号接收装置包括：估计部分，估计在接收信号已被变换为频域信号之后的接收信号的传递函数; 解调部，根据由所述估计部估计出的传递函数解调所述接收信号; 多个变化检测部，基于由所述估计部估计的传递函数，使用多种不同的变化检测方法进行变动检测; 可靠性判定部，基于多个变化检测部的变动检测结果的组合的结果来确定可靠性; 以及校正部分，对来自解调部分的解调信号进行纠错，对该解调信号进行可靠性确定部分的可靠性确定结果的应用。

公开(公告)号：US08683287B2

公开(公告)日：2014-03-25

申请号：US13231074

申请日：2011-09-13

申请人： Kenichi Tokoro ,  Masami Aizawa

发明人： Kenichi Tokoro ,  Masami Aizawa

IPC分类号： H03M13/00

CPC分类号： H03M13/253 ,  H03M13/256 ,  H03M13/2936 ,  H03M13/2948 ,  H03M13/6325 ,  H04L1/005 ,  H04L1/0054 ,  H04L1/0065 ,  H04L1/0071 ,  H04L2001/0093

摘要： According to one embodiment, an error correcting decoder includes a first error correction decoding module, an interleaving module, a delay module, a second error correction decoding module, and a corrector. The first error correction decoding module performs a first error correction decoding to a received signal in accordance with a broadcasting system. The interleaving module rearranges a data array of an output of the first error correction decoding module in a second order. The data array is ordered in a first order which is reverse to the second order. The delay module delays the received signal by a processing time of the first error correction decoding module. The second error correction decoding module performs a second error correction decoding to an output of the interleaving module and an output of the delay module. The corrector configured to correct a delay of an output of the second error correction decoding module based on a packet position defined by the broadcasting system.

摘要翻译： 根据一个实施例，纠错解码器包括第一纠错解码模块，交织模块，延迟模块，第二纠错解码模块和校正器。 第一纠错解码模块根据广播系统对接收到的信号执行第一纠错解码。 交织模块以第二顺序重排第一纠错解码模块的输出的数据阵列。 数据数组以与第二个顺序相反的第一个顺序排序。 延迟模块将接收信号延迟第一纠错解码模块的处理时间。 第二纠错解码模块对交织模块的输出和延迟模块的输出执行第二纠错解码。 校正器被配置为基于由广播系统定义的分组位置来校正第二纠错解码模块的输出的延迟。

公开(公告)号：US08259853B2

公开(公告)日：2012-09-04

申请号：US12174916

申请日：2008-07-17

申请人： Masami Aizawa

发明人： Masami Aizawa

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H04L25/067 ,  H03M13/3994 ,  H03M13/45 ,  H04L1/0052 ,  H04L1/0071 ,  H04L27/2601 ,  H04L27/2647

摘要： A receiving apparatus includes a demodulation means for demodulating a transmission signal to output a demodulation output having a predetermined number of bits; a reliability calculation means for calculating reliability of the transmission signal to output reliability information; a conversion processing means for reducing the number of bits of the demodulation output on the basis of the reliability information, and for multiplexing the demodulation output having the reduced number of bits and the reliability information to output the multiplexed result; and a deinterleave means for deinterleaving the output of the conversion processing means.

摘要翻译： 接收装置包括解调装置，用于解调发送信号以输出具有预定比特数的解调输出; 可靠性计算装置，用于计算发送信号的可靠性以输出可靠性信息; 转换处理装置，用于根据可靠性信息减少解调输出的位数，并且对具有减少的位数和可靠性信息的解调输出进行多路复用以输出多路复用结果; 以及用于对所述转换处理装置的输出进行解交织的解交织装置。

公开(公告)号：US20110033012A1

公开(公告)日：2011-02-10

申请号：US12834178

申请日：2010-07-12

申请人： Hidehiro Matsuoka ,  Masami Aizawa ,  Tatsuhisa Furukawa

发明人： Hidehiro Matsuoka ,  Masami Aizawa ,  Tatsuhisa Furukawa

IPC分类号： H04L27/06

CPC分类号： H04L25/022 ,  H04L25/03006 ,  H04L25/03159 ,  H04L27/2662 ,  H04L27/2666 ,  H04L27/2675

摘要： A channel estimator includes: a delay time estimation section configured to estimate a delay time of a received signal; an FFT parameter determination section configured to determine an FFT window position and an FFT size according to the estimated delay time; a first and a second FFT sections configured to transform the received signal and a known pattern signal, respectively, to the frequency domain based on the FFT window position and the FFT size that are determined; a channel response calculation section configured to perform division processing to divide the output of the first FFT section by the output of the second FFT section; and an IFFT section configured to apply IFFT to the output of the channel response calculation section based on the determined FFT size, and the delay time estimation section estimates a delay time based on the output of the IFFT section.

摘要翻译： 信道估计器包括：延迟时间估计部分，被配置为估计接收信号的延迟时间; FFT参数确定部分，被配置为根据估计的延迟时间确定FFT窗口位置和FFT大小; 第一和第二FFT部分，被配置为基于所确定的FFT窗口位置和FFT大小将接收信号和已知模式信号分别转换到频域; 信道响应计算部分，被配置为执行除法处理，以将第一FFT部分的输出除以第二FFT部分的输出; 以及IFFT部，被配置为基于所确定的FFT大小将IFFT应用于所述信道响应计算部的输出，并且所述延迟时间估计部基于所述IFFT部的输出来推定延迟时间。

公开(公告)号：US20100226467A1

公开(公告)日：2010-09-09

申请号：US12714751

申请日：2010-03-01

申请人： Tatsuhisa Furukawa ,  Hidehiro Matsuoka ,  Masami Aizawa

发明人： Tatsuhisa Furukawa ,  Hidehiro Matsuoka ,  Masami Aizawa

IPC分类号： H04L7/02

CPC分类号： H04L7/042 ,  H04B1/7075 ,  H04B2201/70715 ,  H04H40/18 ,  H04L7/043

摘要： A frame number detecting device includes: a symbol counter that receives a received signal including frames each of which is formed of a predetermined number of symbols, and outputs a count value as a symbol number for each of the symbols by incrementing the count value by one every time one symbol is inputted, each of the frames including a frame synchronization signal including a part obtained by shifting a frame synchronization signal of a different frame on a symbol-by-symbol basis according to a predetermined rule; a sequence storage that stores a synchronization sequence based on at least one of the frame synchronization signals included in the received signal, and a pattern matching unit that performs pattern matching between the synchronization sequence stored in the sequence storage and the received signal.

摘要翻译： 帧号检测装置包括：符号计数器，其接收包括由预定数量的符号形成的帧的接收信号，并且通过将计数值递增1来输出计数值作为每个符号的符号数 每次输入一个符号时，每个帧包括帧同步信号，该帧同步信号包括根据预定规则逐个符号地移位不同帧的帧同步信号而获得的部分; 基于包含在接收信号中的帧同步信号中的至少一个存储同步序列的序列存储器，以及执行存储在序列存储器中的同步序列与接收信号之间的模式匹配的模式匹配单元。

公开(公告)号：US07313086B2

公开(公告)日：2007-12-25

申请号：US10773149

申请日：2004-02-09

申请人： Masami Aizawa

发明人： Masami Aizawa

IPC分类号： H04J11/00 ,  H04J3/16 ,  H04B1/69 ,  H03K9/00 ,  H04L27/00

CPC分类号： H04L25/0232 ,  H04L5/0048 ,  H04L27/2647

摘要： An OFDM receiver includes a converter configured to generate a transform signal by Fourier transform of a received signal. A first interpolator is configured to detect a pilot signal from the transform signal, and to provide time interpolation to the pilot signal. An interference detector is configured to provide arithmetic processing to the time interpolated pilot signal, and to detect interference by comparing a result of the arithmetic processing with a threshold. A second interpolator is configured to provide frequency interference interpolation with respect to the interference detected pilot signal, and to provide frequency interpolation to the pilot signal after the interference interpolation. A demodulator is configured to perform demodulation based on the transform signal and the frequency interpolated pilot signal.

摘要翻译： OFDM接收机包括被配置为通过对接收信号进行傅里叶变换来生成变换信号的转换器。 第一内插器被配置为检测来自变换信号的导频信号，并且为导频信号提供时间插值。 干扰检测器被配置为向时间内插导频信号提供算术处理，并且通过将算术处理的结果与阈值进行比较来检测干扰。 第二内插器被配置为针对干扰检测导频信号提供频率干扰内插，并且在干扰内插之后向导频信号提供频率插值。 解调器被配置为基于变换信号和频率内插导频信号进行解调。

公开(公告)号：US07043680B2

公开(公告)日：2006-05-09

申请号：US09969766

申请日：2001-10-04

申请人： Masami Aizawa

发明人： Masami Aizawa

IPC分类号： H03M13/45 ,  G08C15/02

CPC分类号： H04L27/2647

摘要： A receiving apparatus includes a demodulation circuit which estimates a transfer function of a reception signal in which a time domain has been converted into a frequency domain and demodulates the reception signal according to a demodulation method corresponding to the estimated transfer function, a reliability determining circuit which determines the reliability of the demodulation signal based on the transfer function estimated by the demodulation circuit, a variation detecting circuit which detects a variation amount of the demodulation signal on a frequency base, time base, a de-mapping circuit which subjects the demodulation signal to a de-mapping process and in which the contents of the de-mapping process are changed according to the result of determination in the reliability determining circuit and the result of detection in the variation detecting circuit, an error correction circuit which makes error correction based on the signal subjected to the de-mapping process.

公开(公告)号：US06900559B2

公开(公告)日：2005-05-31

申请号：US09767459

申请日：2001-01-23

申请人： Masami Aizawa ,  Akihiro Ito

发明人： Masami Aizawa ,  Akihiro Ito

IPC分类号： H01F7/02 ,  H02K1/02 ,  H02K15/03 ,  H02K37/14 ,  H02K15/10 ,  H02K15/12

CPC分类号： H02K1/02

摘要： To provide a rotor magnet which is small in size and provided with high magnetic energy, a rotor magnet is formed by adding a SmFeN magnetic powder to a binder such as a polyaxnide. The SmFeN magnetic powder is provided in a size of about one-tenth that of an NdFeB magnetic powder. Therefore, the density of the magnetic powder in the magnet can be made uniform. Accordingly, there is not any dispersion of the magnetic poles when a number of poles are magnetized and the magnet can be made smaller since the maximum energy product of the magnet is higher than that of an SmCo series magnet.

摘要翻译： 为了提供尺寸小并且具有高磁能的转子磁体，通过将SmFeN磁性粉末加入到诸如多晶硅的粘合剂中来形成转子磁体。 SmFeN磁粉的尺寸约为NdFeB磁粉的十分之一。 因此，可以使磁铁中的磁粉的密度均匀。 因此，由于磁体的最大能量乘积高于SmCo系列磁体，因此磁极的磁极数量不会变多，能够使磁体变小。