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1. 发明专利

JP2014090404A Frame synchronization detector and receiver 有权
标题翻译：帧同步检测器和接收器
公开(公告)号：JP2014090404A
公开(公告)日：2014-05-15
申请号：JP2013170866
申请日：2013-08-21
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04L7/08 , H04J11/00
摘要： PROBLEM TO BE SOLVED: To provide a receiver which can detect a signal frame accurately, even when a received signal is affected by carrier frequency offset and distorted.SOLUTION: A frame synchronization detection unit 26 in a receiver includes a first delay unit 31 for outputting a delay signal r(t-T1) by delaying a received signal r(t) by a delay amount exceeding one frame length, an autocorrelation calculation unit 33 for calculating autocorrelation between a known signal sequence included in the received signal r(t) and a delay known signal sequence included in the delay signal r(t-T1), and generating a plurality of autocorrelation values corresponding to a plurality of frames, respectively, and a frame number detection unit 35 for detecting a peak value among the autocorrelation values, and specifying the frame number of a frame corresponding to the peak value.
摘要翻译：要解决的问题：即使当接收到的信号受载波频率偏移和失真影响时，也可以准确地检测信号帧的接收机。解码：接收机中的帧同步检测单元26包括：第一延迟单元31，用于输出通过将接收信号r（t）延迟超过一帧长度的延迟量的延迟信号r（t-T1）;自相关计算单元33，用于计算包括在接收信号r（t）中的已知信号序列与包括在延迟信号r（t-T1）中的延迟已知信号序列，并且分别产生对应于多个帧的多个自相关值;以及帧号检测单元35，用于检测自相关值中的峰值，并指定与峰值对应的帧的帧号。

2. 发明专利

JP2011049632A Ofdm receiving apparatus 有权
标题翻译： OFDM接收设备
公开(公告)号：JP2011049632A
公开(公告)日：2011-03-10
申请号：JP2009194042
申请日：2009-08-25
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04J11/00
摘要： PROBLEM TO BE SOLVED: To precisely perform transmission line estimation even for a transmission line rapidly varying with time and flat frequency characteristics.
SOLUTION: An OFDM receiving apparatus includes: an SP transmission line estimation part 151 which uses a received value of an SP signal and a known value of the SP signal to estimate frequency characteristics of a transmission line in a carrier position of the SP signal in each symbol; an advance transmission line estimation part 152 which uses the estimation result of the SP transmission line estimation part 151 to estimate, in advance, frequency characteristics of the transmission line in a preliminarily determined specific carrier position in each symbol; a time-direction transmission line estimation part 153 which uses the estimation result of the advance transmission line estimation part 152 to perform transmission line estimation in a time direction; and a frequency-direction transmission line estimation part 154 which uses the estimation result of the time-direction transmission line estimation part 153 to perform transmission line estimation in a frequency direction.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：即使对于随时间和平坦频率特性快速变化的传输线，也精确地进行传输线估计。解决方案：OFDM接收装置包括：SP传输线估计部151，其使用SP信号的接收值和SP信号的已知值来估计SP的载波位置中的传输线的频率特性信号在每个符号; 预先传输线估计部152，其使用SP传输线估计部151的估计结果预先估计每个符号中预先确定的特定载波位置中的传输线的频率特性; 使用先行传输线估计部152的估计结果在时间方向上进行传输线估计的时间传输线估计部153; 以及使用时间方向传输线估计部153的估计结果来进行频率方向的传输线估计的频率方向传输线估计部154。版权所有（C）2011，JPO＆INPIT

3. 发明专利

JP2007325080A Receiver 有权
标题翻译：接收器
公开(公告)号：JP2007325080A
公开(公告)日：2007-12-13
申请号：JP2006154617
申请日：2006-06-02
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04L27/38 , H04L7/00
摘要： PROBLEM TO BE SOLVED: To properly detect both the signals containing repetition waveforms and its reception timing even at AGC transient response, relating to a receiver which detects signals containing repetition waveforms among received signals. SOLUTION: A received signal is converted to complex base band signals in an IQ demodulation part (14), and is supplied to a phase information generating part (15). The phase information generating part (15) generates the signal representing information about phases of base band signals of inputted I, Q. A correlation detection part (16) detects correlation waveforms between the phase information signal and the signal in which the phase information signal is delayed by a period equal to the repetition interval of the same waveform. A judging part 17 compares the correlation waveform signal with a threshold value to judge presence of the signal containing repetition of the same waveform in the received signal as well as detection timing of the received signal. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使在AGC瞬态响应时，即使在检测包含接收信号中的重复波形的信号的接收机中，也能适当地检测包含重复波形的信号及其接收定时。解决方案：接收到的信号在IQ解调部分（14）中被转换成复数基带信号，并被提供给相位信息产生部分（15）。相位信息生成部（15）生成表示输入的I，Q的基带信号的相位信息的信号。相关检测部（16）检测相位信息信号和相位信息信号为延迟等于相同波形的重复间隔的周期。判断部17将相关波形信号与阈值进行比较，以判断在接收信号中包含相同波形的重复信号的存在以及接收信号的检测定时。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2011193045A Ofdm receiving device 有权
标题翻译： OFDM接收机
公开(公告)号：JP2011193045A
公开(公告)日：2011-09-29
申请号：JP2010054936
申请日：2010-03-11
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04J11/00 , H04B7/005
摘要： PROBLEM TO BE SOLVED: To provide an OFDM receiver for estimating a transmission path precisely even in the case of a transmission path where long delay waves exist and a temporal variation is sharp. SOLUTION: The OFDM receiver includes: an SP transmission path estimation unit 151 for estimating frequency characteristics of the transmission path at a carrier position of an SP signal in each symbol by a value of a received SP signal and a value of a known SP signal; a first preceding transmission path estimation unit 152 for precedently estimating the frequency characteristics of the transmission path at a specific carrier position predetermined within each symbol by a result estimated by the SP transmission path estimation unit 151, namely a transmission path estimation result of the SP signal in symbols adjacent in front and behind; a temporal direction transmission path estimation unit 153 for estimating a transmission path in a temporal direction by a result estimated by the first preceding transmission path estimation unit 152; and a frequency direction transmission path estimation unit 154 for estimating a transmission path in a frequency direction by a result estimated by the temporal direction transmission path estimation unit 153. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：即使在存在长延迟波并且时间变化较大的传输路径的情况下，也提供用于精确地估计传输路径的OFDM接收机。解决方案：OFDM接收机包括：SP传输路径估计单元151，用于通过接收到的SP信号的值和已知的SP信号的值来估计每个符号中的SP信号的载波位置处的传输路径的频率特性 SP信号; 第一先前传输路径估计单元152，用于通过由SP传输路径估计单元151估计的结果先前估计在每个符号内预定的特定载波位置处的传输路径的频率特性，即SP信号的传输路径估计结果在前后相邻的符号中; 时间方向传输路径估计单元153，用于通过由第一先前传输路径估计单元152估计的结果来估计时间方向上的传输路径; 以及频率方向传输路径估计单元154，用于通过由时间方向传输路径估计单元153估计的结果来估计频率方向上的传输路径。版权所有：（C）2011，JPO＆INPIT

5. 发明专利

JP2007306629A Communication device and communication system 审中-公开
标题翻译：通信设备和通信系统
公开(公告)号：JP2007306629A
公开(公告)日：2007-11-22
申请号：JP2007212157
申请日：2007-08-16
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04B7/26
摘要： PROBLEM TO BE SOLVED: To provide a communication device capable of obtaining an optimal data transmission rate in a data communication within a predetermined communicable area.
SOLUTION: The communication device for making data communication with the predetermined communicable area includes: a number of device detection means for detecting the number of communication devices in the communicable area; and a transmission rate control means for controlling a transmission rate of data on the basis of the number of the communication devices detected by the number of device detection means and a size of the data transmitted by the communication devices.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供能够在预定的可通信区域内的数据通信中获得最佳数据传输速率的通信设备。解决方案：用于与预定通信区域进行数据通信的通信设备包括：多个设备检测装置，用于检测可通信区域中的通信设备的数量; 以及传输速率控制装置，用于根据由设备检测装置的数量检测的通信设备的数量和由通信设备发送的数据的大小来控制数据的传输速率。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2010278827A Ofdm symbol identification device and ofdm receiver 有权
标题翻译： OFDM符号识别设备和OFDM接收器
公开(公告)号：JP2010278827A
公开(公告)日：2010-12-09
申请号：JP2009129944
申请日：2009-05-29
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04J11/00
摘要： PROBLEM TO BE SOLVED: To provide an OFDM symbol identification device or the like for identifying an OFDM symbol with high accuracy at low cost. SOLUTION: A delaying part 50 delays an input OFDM signal S13 to generate a delay signal. A correlation calculating part 70 calculates a correlation between the OFDM signal S13 and the delay signal. A peak position detecting part 90 detects peak positions of the correlation for each observation period of predetermined time length. A peak position evaluating part 110 obtains a plurality of detected peak positions, and evaluates the identity of the peak positions on the basis of a difference (peak position difference) among the plurality of peak positions. An identifying part 130 obtains a plurality of kinds of peak position evaluation results by the peak position evaluating part, and identifies the effective symbol length and guard interval length of the OFDM signal on the basis of a peak position evaluation result that has the best identity of the peak position among the plurality of kinds of peak position evaluation results. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供用于以低成本高精度地识别OFDM符号的OFDM符号识别装置等。解决方案：延迟部分50延迟输入OFDM信号S13以产生延迟信号。相关计算部70计算OFDM信号S13与延迟信号之间的相关性。峰值位置检测部分90检测每个预定时间长度的观察周期的相关性的峰值位置。峰值位置评估部分110获得多个检测到的峰值位置，并且基于多个峰值位置之间的差（峰值位置差）来评估峰值位置的标识。识别部分130通过峰值位置评估部分获得多种峰值位置评估结果，并且基于具有最高同一性的峰值位置评估结果来识别OFDM信号的有效符号长度和保护间隔长度在多种峰值位置评估结果中的峰值位置。版权所有（C）2011，JPO＆INPIT

7. 发明专利

JP2010124302A Multichannel receiver 审中-公开
标题翻译：多通道接收器
公开(公告)号：JP2010124302A
公开(公告)日：2010-06-03
申请号：JP2008296772
申请日：2008-11-20
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO , IDO JUN , ARITA EIJI , TAKEUCHI MITSURU
IPC分类号： H04J1/04 , H04J11/00 , H04L27/26
摘要： PROBLEM TO BE SOLVED: To prevent increase in circuit scale when a plurality of A/D conversion parts are prepared and increase in speed of a clock signal supplied to the A/D conversion part, in a multichannel receiver for receiving signals of plural frequency bands. SOLUTION: The multichannel receiver 1 includes: an A/D conversion part 12 for A/D converting a reception signal composed of signals of plural frequency bands; a clock generation part 14 for controlling the frequency of a clock supplied to the A/D conversion part 12 to a predetermined value in accordance with the frequency arrangement of desired signals of plural frequency bands to output the clock; and a demodulation part 13 for simultaneously reproducing a plurality of data by extracting the desired signals of plural frequency bands from the output of the A/D conversion part 12. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了防止当准备多个A / D转换部分并且提供给A / D转换部分的时钟信号的速度增加时，在用于接收信号的信号的多通道接收器中电路规模的增加多个频带。解决方案：多通道接收机1包括：A / D转换部分12，用于对由多个频带的信号组成的接收信号进行A / D转换; 时钟生成部分14，用于根据多个频带的期望信号的频率排列将提供给A / D转换部分12的时钟的频率控制到预定值，以输出时钟; 以及解调部分13，用于通过从A / D转换部分12的输出中提取多个频带的期望信号来同时再现多个数据。版权所有（C）2010，JPO＆INPIT

8. 发明专利

JP2015029256A 受信装置及び受信方法有权
标题翻译：接收和接收方法
公开(公告)号：JP2015029256A
公开(公告)日：2015-02-12
申请号：JP2014087806
申请日：2014-04-22
申请人：三菱電機株式会社 , Mitsubishi Electric Corp
发明人： KAIZU AKI , KADOTA YUKIHIRO , ASAHINA TSUTOMU , SHINPO DAISUKE
IPC分类号： H04B7/08 , H04J11/00
CPC分类号： H04B7/0885 , H04B7/082 , H04B7/0842 , H04L1/04 , H04L1/0631 , H04L1/20 , H04L5/0048 , H04L25/0204 , H04L27/01
摘要：【課題】既知信号がシングルキャリアで伝送される伝送方式においても、既知信号の等化を行う回路を別途備えずに、信号品質を推定して、ダイバーシチ合成を行うことができるようにすること。【解決手段】アンテナ101−iで受信された信号を直交復調する信号直交復調部111−iと、直交復調された信号に含まれている既知信号から遅延プロファイルを検出して、その遅延プロファイルから伝送路を推定する伝送路推定部116−iと、その伝送路推定結果を用いて、直交復調された信号に含まれているデータ信号を等化して、合成部に出力する信号等化部119—iと、遅延プロファイルに含まれている信号成分の電力と雑音成分の電力との比に基づいた信号品質を推定して、その結果を合成部に出力する信号品質推定回路123−iとを備え、合成部は、信号品質に基づきデータ信号の重み付けを決定しダイバーシチ合成を行う。【選択図】図2
摘要翻译：要解决的问题：提供一种接收机和接收方法，通过对信号质量的估计可以进行分集合成，而不需另外提供用于均衡已知信号的电路，即使在布置成使得已知信号由单载波传输的传输系统中也是如此。解决方案：接收机包括：信号正交解调部分111-i，其可操作以对由天线101-i接收的信号执行正交解调; 传输路径估计部分116-i，用于从包括在经过正交解调的信号中的已知信号中检测延迟分布，并估计来自延迟分布的传输路径; 信号均衡部分119-i，用于通过使用传输路径估计的结果对包含在经过正交解调的信号中的数据信号进行均衡，并输出到合成部分; 以及信号质量估计电路123-i，其可操作以基于延迟分布中包括的信号分量的电功率与噪声分量的电功率的比值来估计信号质量，并将估计结果输出到合成部分。合成部分基于信号质量确定数据信号的权重，并进行分集合成。

9. 发明专利

JP2008263255A Communication device 有权
标题翻译：通信设备
公开(公告)号：JP2008263255A
公开(公告)日：2008-10-30
申请号：JP2007102374
申请日：2007-04-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04L27/34 , H04B7/26 , H04J11/00
摘要： PROBLEM TO BE SOLVED: To provide a communication device which performs adaptive modulation wherein deterioration in communication efficiency can be improved while suppressing an increase in hardware scale. SOLUTION: This invention relates to the communication device comprising: a transmission quality detector 17 which detects transmission quality of a reception signal for each symbol; a modulation multi-value number detector 18 which detects a modulation multi-value number for each symbol based upon transmission quality of each symbol output from the transmission quality detector 17; a maximum transmission symbol number determining unit 19 which determines a maximum transmission symbol number from modulation multi-value numbers by symbols output from the multi-value number detector 18; and transmission signal generators (20 to 25) which generate a transmission signal including the modulation multi-value numbers by the symbols detected by the modulation multi-value detector 18 and the maximum transmission symbol number determined by the maximum transmission symbol number determining unit 19. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种执行自适应调制的通信设备，其中可以在抑制硬件规模的增加的同时提高通信效率的劣化。解决方案：本发明涉及通信设备，包括：传输质量检测器17，其检测每个符号的接收信号的传输质量; 调制多值数检测器18，其基于从传输质量检测器17输出的每个符号的传输质量检测每个符号的调制多值数; 最大发送符号数确定单元19，其通过从多值数检测器18输出的符号从调制多值数确定最大发送符号数; 以及发送信号发生器（20〜25），其通过由调制多值检测器18检测出的符号和由最大发送符号数确定单元19确定的最大发送符号数生成包括调制多值数的发送信号。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2004364274A Communication device, communication system and communication method 有权
公开(公告)号：JP2004364274A
公开(公告)日：2004-12-24
申请号：JP2004140029
申请日：2004-05-10
申请人： Mitsubishi Electric Corp , 三菱電機株式会社
发明人： KADOTA YUKIHIRO
IPC分类号： H04L29/08 , H04B7/26 , H04W72/04 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide a communication device capable of obtaining an optimal data transmission rate in a data communication within a predetermined communicable area.
SOLUTION: The communication device comprises; a stay time operating means for operating a stay time that is time after the communication device enters the communicable area and until the device leaves the area on the basis of a moving speed of the communication device and the communicable area; and a transmission rate control means for controlling the data transmission rate on the basis of the stay time operated in the stay time operating means and a size of data to be transmitted by the communication device.
COPYRIGHT: (C)2005,JPO&NCIPI

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