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    • 1. 发明授权
    • Signal separation device and signal separation method
    • 信号分离装置和信号分离方法
    • US07672408B2
    • 2010-03-02
    • US11128193
    • 2005-05-13
    • Kenichi HiguchiHiroyuki KawaiNoriyuki MaedaMamoru Sawahashi
    • Kenichi HiguchiHiroyuki KawaiNoriyuki MaedaMamoru Sawahashi
    • H04B7/10
    • H04L25/03331H04B7/04H04L25/0204H04L25/0228H04L25/0246H04L2025/0342
    • 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.
    • 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。
    • 2. 发明申请
    • Signal Separating Device and Signal Separating Method
    • 信号分离装置及信号分离方法
    • US20080095257A1
    • 2008-04-24
    • US11577599
    • 2005-09-05
    • Noriyuki MaedaKenichi HiguchiHiroyuki KawaiMamoru Sawahashi
    • Noriyuki MaedaKenichi HiguchiHiroyuki KawaiMamoru Sawahashi
    • H04L27/28
    • H04B7/0413H04L25/03006H04L25/067H04L2025/03426H04L2025/03528
    • 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.
    • 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。
    • 3. 发明申请
    • MIMO MULTIPLEXING COMMUNICATION SYSTEM AND A SIGNAL SEPARATION METHOD
    • MIMO多路复用通信系统和信号分离方法
    • US20090213965A1
    • 2009-08-27
    • US11909607
    • 2006-03-20
    • Noriyuki MaedaHiroyuki KawaiKenichi HiguchiMamoru Sawahashi
    • Noriyuki MaedaHiroyuki KawaiKenichi HiguchiMamoru Sawahashi
    • H04L27/06
    • H04B7/0413H04L25/0204H04L25/0228H04L25/0246H04L25/03191H04L25/03242H04L2025/03426
    • 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.
    • 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。
    • 5. 发明授权
    • MIMO multiplexing communication system and a signal separation method
    • MIMO复用通信系统和信号分离方法
    • US07864897B2
    • 2011-01-04
    • US11909607
    • 2006-03-20
    • Noriyuki MaedaHiroyuki KawaiKenichi HiguchiMamoru Sawahashi
    • Noriyuki MaedaHiroyuki KawaiKenichi HiguchiMamoru Sawahashi
    • H04L27/06H04L23/02
    • H04B7/0413H04L25/0204H04L25/0228H04L25/0246H04L25/03191H04L25/03242H04L2025/03426
    • 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.
    • 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。