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2. 发明授权

US08102898B2 Channel estimating apparatus, CDMA receiving apparatus, and channel estimating method 失效
标题翻译：信道估计装置，CDMA接收装置和信道估计方法
公开(公告)号：US08102898B2
公开(公告)日：2012-01-24
申请号：US11816446
申请日：2006-02-24
申请人： Mariko Matsumoto , Shousei Yoshida , Noriyuki Maeda , Junichiro Kawamoto
发明人： Mariko Matsumoto , Shousei Yoshida , Noriyuki Maeda , Junichiro Kawamoto
IPC分类号： H04B1/707
CPC分类号： H04B1/7113
摘要： A corrected channel estimating apparatus is disclosed, which is capable of removing side-lobe components mutually leaking into transmission paths from channel estimates to increase the accuracy. A channel estimation unit calculates channel estimates for a plurality of transmission paths due to a signal that arrives through multipath. A channel estimate correction unit removes side-lobe components mutually leaking into the transmission paths from the channel estimates calculated by the channel estimation unit to correct the channel estimates. In this way, the corrected channel estimating apparatus estimates transmission paths of a multipath.
摘要翻译：公开了一种校正信道估计装置，其能够从信道估计中去除相互泄漏到传输路径中的旁瓣分量，从而提高精度。信道估计单元由于通过多路径到达的信号来计算多个传输路径的信道估计。信道估计校正单元从信道估计单元计算的信道估计中去除相互泄漏到传输路径中的旁瓣分量，以校正信道估计。以这种方式，校正信道估计装置估计多路径的传输路径。

3. 发明授权

US07672408B2 Signal separation device and signal separation method 有权
标题翻译：信号分离装置和信号分离方法
公开(公告)号：US07672408B2
公开(公告)日：2010-03-02
申请号：US11128193
申请日：2005-05-13
申请人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
发明人： Kenichi Higuchi , Hiroyuki Kawai , Noriyuki Maeda , Mamoru Sawahashi
IPC分类号： H04B7/10
CPC分类号： H04L25/03331 , H04B7/04 , H04L25/0204 , H04L25/0228 , H04L25/0246 , H04L2025/0342
摘要： A signal separation device is disclosed that is able to reduce a number of calculations required when separating a received signal transmitted from transmission devices into the individual transmission signal. The signal separation device includes a signal point derivation unit that multiplies the received signal with respective elements of a unitary matrix, and derives at least one received-signal signal point on a signal constellation diagram; a definition unit that defines plural sections on the signal constellation diagram, each of the sections including a predetermined number of signal points; a detection unit that detects a received-signal section from the sections, the received-signal section including the received-signal signal point; a selection unit that selects signal points in the received-signal section as candidates of the received-signal signal point; and a determination unit that determines the transmission signals based on the selected signal points.
摘要翻译：公开了一种信号分离装置，其能够减少将从发送装置发送的接收信号分离成各个发送信号所需的计算次数。信号分离装置包括：信号点导出单元，用于将接收到的信号与单一矩阵的各个元素相乘，并在信号星座图上导出至少一个接收信号信号点; 定义单元，其在信号星座图上定义多个部分，每个部分包括预定数量的信号点; 检测单元，其从所述部分检测接收信号部分，所述接收信号部分包括所述接收信号信号点; 选择单元，其选择接收信号部分中的信号点作为接收信号信号点的候选; 以及确定单元，其基于所选择的信号点来确定发送信号。

4. 发明申请

US20090034486A1 WIRELESS BASE STATION, MOBILE STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD 审中-公开
标题翻译：无线基站，移动站，无线通信系统和无线通信方法
公开(公告)号：US20090034486A1
公开(公告)日：2009-02-05
申请号：US12184532
申请日：2008-08-01
申请人： Hideaki Takahashi , Noriyuki Maeda , Shunji Miura , Hiromitsu Asakura
发明人： Hideaki Takahashi , Noriyuki Maeda , Shunji Miura , Hiromitsu Asakura
IPC分类号： H04B7/216
CPC分类号： H04L5/0053 , H04L5/0007 , H04L5/0042 , H04L5/0044
摘要： The wireless base station 10 includes a multiplexing units 13 generating user data; a channel assignment control unit 14 for selecting subcarrier groups from a plurality of subcarriers on two carriers, forming two wireless frames including subchannels generated from the subcarrier groups, and time-division multiplexes and sets the user data and control data to the two wireless frames; and a transmitting and receiving unit 16 transmitting a wireless signal including the wireless frames, wherein the channel assignment control unit 14 divides all of the subchannels in the two wireless frames into areas of destination sectors, stores the control data only in the corresponding area, and stores the user data in all of the areas in the two wireless frames.
摘要翻译：无线基站10包括生成用户数据的复用单元13; 信道分配控制单元14，用于从两个载波上的多个子载波中选择副载波组，形成包括从子载波组产生的子信道的两个无线帧，并对用户数据和控制数据进行时分复用，并将其设置为两个无线帧; 以及发送和接收单元16，发送包括无线帧的无线信号，其中信道分配控制单元14将两个无线帧中的所有子信道划分成目的地扇区的区域，仅将控制数据存储在对应的区域中，以及将用户数据存储在两个无线帧中的所有区域中。

5. 发明申请

US20080095257A1 Signal Separating Device and Signal Separating Method 有权
标题翻译：信号分离装置及信号分离方法
公开(公告)号：US20080095257A1
公开(公告)日：2008-04-24
申请号：US11577599
申请日：2005-09-05
申请人： Noriyuki Maeda , Kenichi Higuchi , Hiroyuki Kawai , Mamoru Sawahashi
发明人： Noriyuki Maeda , Kenichi Higuchi , Hiroyuki Kawai , Mamoru Sawahashi
IPC分类号： H04L27/28
CPC分类号： H04B7/0413 , H04L25/03006 , H04L25/067 , H04L2025/03426 , H04L2025/03528
摘要： A signal detection apparatus improving signal detection accuracy in a receiver for communications system complying with the MIMO scheme. The signal detection apparatus detects transmission signals sent from transmission antennas based on received signals received by receiving antennas. The apparatus includes: a first determination mechanism for determining symbol candidates of the transmission signals in sequence based on the QRM-MLD method using the received signals arranged in first order; a second determination mechanism for determining symbol candidates of the transmission signals in sequence based on the QRM-MLD method using the received signals arranged in second order that is different from the first order; and an output mechanism for outputting symbol candidates and likelihood of the transmission signals based on determination results of at least the first and the second determination mechanisms.
摘要翻译：一种提高符合MIMO方案的通信系统的接收机中的信号检测精度的信号检测装置。信号检测装置基于由接收天线接收到的接收信号来检测从发送天线发送的发送信号。该装置包括：第一确定机构，用于基于使用以一级排列的接收信号的QRM-MLD方法来顺序地确定传输信号的符号候选; 基于使用与第一次不同的二次排列的接收信号的QRM-MLD方法来顺序地确定发送信号的符号候选的第二确定机构; 以及输出机构，用于基于至少第一和第二确定机构的确定结果输出符号候选和发送信号的可能性。

6. 发明授权

US08416872B2 Radio communication apparatus and a radio communication method 失效
标题翻译：无线电通信装置和无线电通信方法
公开(公告)号：US08416872B2
公开(公告)日：2013-04-09
申请号：US11909718
申请日：2006-03-27
申请人： Kenichi Higuchi , Noriyuki Maeda , Mamoru Sawahashi
发明人： Kenichi Higuchi , Noriyuki Maeda , Mamoru Sawahashi
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04B7/0669 , H04B7/0617 , H04B7/0665 , H04B7/0689 , H04B7/08 , H04L1/0003 , H04L1/0013 , H04L1/0026 , H04L1/0057 , H04L1/0643 , H04L1/1819
摘要： The radio communication apparatus includes two or more antennas, a receiving unit for receiving a notice signal from a communication partner, two or more units for changing the number of data sequences and for coupling to the antennas according to two or more transmitting methods out of a MIMO multiplexing method, a MIMO diversity method, and an adaptive array antenna method, a selecting unit for selecting at least one out of the two or more units based on the notice signal, and a transmitting unit for notifying the communication partner of the transmission method corresponding to the selected unit.
摘要翻译：无线电通信装置包括两个或多个天线，用于从通信对方接收通知信号的接收单元，用于改变数据序列数目的两个或更多个单元，并且根据两个或更多个发送方法耦合到天线 MIMO复用方法，MIMO分集方法和自适应阵列天线方法，用于基于通知信号来选择两个以上的单元中的至少一个的选择单元，以及用于通知通信对方的发送方法的发送单元对应于所选单位。

7. 发明授权

US08290105B2 Signal reception device and method of signal reception timing detection 有权
标题翻译：信号接收装置及信号接收定时检测方法
公开(公告)号：US08290105B2
公开(公告)日：2012-10-16
申请号：US10986003
申请日：2004-11-12
申请人： Satoshi Nagata , Noriyuki Maeda , Hiroyuki Atarashi , Mamoru Sawahashi
发明人： Satoshi Nagata , Noriyuki Maeda , Hiroyuki Atarashi , Mamoru Sawahashi
IPC分类号： H04L7/00 , H04L7/02
CPC分类号： H04L5/026 , H04L27/2602 , H04L27/2662 , H04L27/2675 , H04L27/2678 , H04L27/2695
摘要： A signal reception device is disclosed that is capable of detecting symbol synchronization timing with high precision in accordance with a condition of a propagation path even in an environment involving multi-path interference. The signal reception device adopts an OFCDM transmission scheme or a multi-carrier transmission scheme. The signal reception device includes a received signal information calculation unit to calculate received signal information representing a signal reception condition of a received signal; an output combination unit to combine correlation values in a predetermined section obtained by correlation detection based on the received signal information; and a symbol timing detection unit to detect a symbol synchronization timing based on the combined value.
摘要翻译：公开了一种信号接收装置，其能够即使在涉及多路径干扰的环境中也能够根据传播路径的条件高精度地检测符号同步定时。信号接收装置采用OFCDM传输方式或多载波传输方案。信号接收装置包括接收信号信息计算单元，用于计算表示接收信号的信号接收条件的接收信号信息; 输出组合单元，其基于所接收的信号信息来组合通过相关检测获得的预定部分中的相关值; 以及符号定时检测单元，用于基于所述组合值检测符号同步定时。

8. 发明授权

US07991360B2 Receiver apparatus, receiving method, and wireless communication system 失效
标题翻译：接收装置，接收方式和无线通信系统
公开(公告)号：US07991360B2
公开(公告)日：2011-08-02
申请号：US10591663
申请日：2005-03-04
申请人： Junichiro Kawamoto , Noriyuki Maeda , Kenichi Higuchi , Mamoru Sawahashi , Shousei Yoshida , Masayuki Kimata
发明人： Junichiro Kawamoto , Noriyuki Maeda , Kenichi Higuchi , Mamoru Sawahashi , Shousei Yoshida , Masayuki Kimata
IPC分类号： H04B1/10
CPC分类号： H04B7/0854 , H04B1/7105 , H04B1/7107 , H04L1/0656 , H04L25/0228 , H04L2025/03426
摘要： A receiving apparatus, a receiving method, and a radio communications system are disclosed. The receiving apparatus is for receiving CDMA signals transmitted by M antennas and received by N antennas, where M and N are positive integers. The receiving apparatus includes a multipath receiving signal demodulating unit for primary demodulation of the CDMA signals received by the receiving antennas to obtain estimated transmission signals, and for obtaining signals in a multipath environment of each path of the receiving antennas based on the estimated results. Further, the receiving apparatus includes a multipath interference canceling unit for deducting signals of the paths other than a target path from the signals received by the receiving antennas to obtain multipath interference cancelled signals. Further, the receiving apparatus includes a demodulator for secondary demodulation of the multipath interference cancelled signals.
摘要翻译：公开了接收装置，接收方法和无线电通信系统。接收装置用于接收由M个天线发送并由N个天线接收的CDMA信号，其中M和N是正整数。接收装置包括：多径接收信号解调单元，用于对由接收天线接收的CDMA信号进行一次解调以获得估计的传输信号，并且用于基于估计的结果获得接收天线的每个路径的多路径环境中的信号。此外，接收装置包括：多径干扰消除单元，用于从由接收天线接收的信号中扣除目标路径以外的路径的信号，以获得多路径干扰消除信号。此外，接收装置包括用于二次解调多径干扰消除信号的解调器。

9. 发明申请

US20090213965A1 MIMO MULTIPLEXING COMMUNICATION SYSTEM AND A SIGNAL SEPARATION METHOD 失效
标题翻译： MIMO多路复用通信系统和信号分离方法
公开(公告)号：US20090213965A1
公开(公告)日：2009-08-27
申请号：US11909607
申请日：2006-03-20
申请人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
发明人： Noriyuki Maeda , Hiroyuki Kawai , Kenichi Higuchi , Mamoru Sawahashi
IPC分类号： H04L27/06
CPC分类号： H04B7/0413 , H04L25/0204 , H04L25/0228 , H04L25/0246 , H04L25/03191 , H04L25/03242 , H04L2025/03426
摘要： A disclosed receiver in a MIMO multiplexing communication system, in which plural signals are simultaneously transmitted from plural transmitting antenna branches using the same frequency, and the transmitted signals are retrieved by receiving signals at plural receiving antennas, separating the received signals and searching for proper symbol metrics for each branch, comprises a QR decomposer for QR decomposing the received signals to orthogonalize the transmitted signals; a symbol replica candidate ranking unit for subtracting surviving symbol replica candidates from the QR decomposed received signals to get remaining received signals and rank the remaining signals in the increasing order of expected branch metrics of the remaining received signals; a symbol replica candidate selector for selecting symbol replica candidates in the ranked order; a branch metric calculator for calculating the branch metrics of the selected symbol replica candidates; and a threshold comparator for comparing the calculated branch metrics with a predetermined threshold; wherein if a calculated branch metric is larger than the predetermined threshold, the branch metric and successive branch metrics are deleted without further searching.
摘要翻译：在MIMO复用通信系统中公开的接收机，其中使用相同频率从多个发送天线分支同时发送多个信号，并且通过在多个接收天线处接收信号来检索所发送的信号，分离接收的信号并搜索适当的符号每个分支的度量包括QR分解器，用于QR分解接收的信号以使发送的信号正交化; 符号复制候选排序单元，用于从所述QR分解的接收信号中减去剩余码元复制候选，以获得剩余的接收信号，并以剩余接收信号的预期分支度量的递增顺序对剩余信号进行排序; 用于以排序顺序选择符号复本候选者的符号复制候选选择器; 分支度量计算器，用于计算所选择的符号复本候选的分支度量; 以及阈值比较器，用于将所计算的分支度量与预定阈值进行比较; 其中如果所计算的分支度量大于所述预定阈值，则所述分支度量和连续分支度量被删除而不进一步搜索。

10. 发明授权

US07532864B2 Noise power estimation method and noise power estimation device 失效
标题翻译：噪声功率估计方法和噪声功率估计装置
公开(公告)号：US07532864B2
公开(公告)日：2009-05-12
申请号：US10524213
申请日：2004-02-16
申请人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
发明人： Masaru Fukuoka , Atsushi Sumasu , Sadayuki Abeta , Noriyuki Maeda , Hiroyuki Atarashi
IPC分类号： H04B17/00
CPC分类号： H04B1/7097 , H04B17/345 , H04B2201/70701 , H04L1/20
摘要： A pilot extract section 14 extracts a pilot signal from received signal. An adder 21 in-phase adds a plurality of correlated values of pilot signals for respective subcarriers. Delay devices 201-1 to 201-6 temporarily maintain one in-phase added value. Multiplier 202-1 to 202-6 multiplies a predetermined coefficient to the in-phase added value that is output from the delay device. The predetermined coefficient reflects the result, which is obtained by correcting for multiple times the difference of channel variation in the different subcarriers that is generated when noise power per one subcarrier is calculated. Each of the multiplying results is added by an adder 24, and is squared by a square device 25. A cumulative adder 26 cumulative-adds the squared values for the whole subcarrier. A multiplier 203 averages by multiplying predetermined values to the cumulative-added values. Having such configuration, even if the correlation between adjacent subcarriers becomes lower by frequency selective fading, the accuracy for estimating noise power can be improved.
摘要翻译：导频提取部分14从接收信号中提取导频信号。同相的加法器21对各个副载波添加导频信号的多个相关值。延迟装置201-1至201-6暂时保持一个同相的附加值。乘法器202-1至202-6将预定系数与从延迟装置输出的同相相加值相乘。预定系数反映通过多次计算在每个子载波的噪声功率被计算时产生的不同子载波中的信道变化的差异而获得的结果。乘法结果中的每一个由加法器24相加，并由平方装置25平方。累积加法器26对整个子载波进行累加 - 相加。乘法器203通过将预定值乘以累积附加值来平均。具有这样的配置，即使相邻副载波之间的相关性通过频率选择性衰落变得较低，也可以提高估计噪声功率的精度。

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