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    • 75. 发明授权
    • System for soft symbol decoding MIMO log-map detection
    • 用于软符号解码MIMO系统的对数映射检测
    • US08483328B2
    • 2013-07-09
    • US12629282
    • 2009-12-02
    • Didier Johannes Richard van NeeVincent Knowles Jones, IVGeert Arnout AwaterJames Gardner
    • Didier Johannes Richard van NeeVincent Knowles Jones, IVGeert Arnout AwaterJames Gardner
    • H04L27/06
    • H04L27/2032H04L25/03006H04L25/067H04L2025/03414H04L2025/03426
    • A soft symbol decoder for use in a multiple input multiple output (MIMO) and OFDM (orthogonal frequency division multiplexing) system. The decoder generates soft symbol values for a digital signal that represents a number of source bits. The source bits are transmitted as symbols in corresponding to points in a signaling constellation. Soft metrics are determined by searching for all possible multi-dimensional symbols that could have been transmitted. The method includes transmitting a sample of the multi-dimensional symbol using K transmit antennas. The multi-dimensional symbol is represent-able as a complex, K-dimensional vector x. Each vector component of vector x represents a signal transmitted with one of the K transmit antennas. After transmission through a communication channel, a sample corresponding to the transmitted sample is received. The received sample is represented by a complex, N-dimensional vector y, where N is the number of receive antennas in the MIMO system. After the sample is received, a soft metric L(bi) is determined for each bit bi encoded by x according to the equation: L ⁡ ( b i ) = σ - 2 · ( min x j ❘ b i = - 1 ⁢  y - Hx j  2 - min x j ❘ b i = + 1 ⁢  y - Hx j  2 ) , , and xj represents all possible values for x. In addition, a reduced complexity method is used for providing soft metric values in the MIMO system. This exemplary aspect reduces the complexity of the above computations from 2BK to 2B(K−1), where B is the number of bits transmitted per symbol per antenna.
    • 一种用于多输入多输出(MIMO)和OFDM(正交频分复用)系统的软符号解码器。 解码器产生表示多个源位的数字信号的软符号值。 源比特在对应于信令星座中的点被作为符号发送。 通过搜索可能已经发送的所有可能的多维符号来确定软度量。 该方法包括使用K个发送天线发送多维符号的采样。 多维符号可以表示为复杂的K维向量x。 矢量x的每个矢量分量表示与K个发射天线中的一个发射的信号。 在通过通信信道传输之后,接收对应于发送的样本的样本。 接收的样本由复数N维向量y表示,其中N是MIMO系统中的接收天线的数量。 在接收到样本之后,根据以下等式为由x编码的每个比特bi确定软度量L(bi):L⁡(bi)= sigma-2·(min xj | bi =-Iy-Hx j2 - min xj | bi = +1y - Hx j2),xj表示x的所有可能值。 另外,降低复杂度的方法用于在MIMO系统中提供软度量值。 该示例性方面降低了从2BK到2B(K-1)的上述计算的复杂度,其中B是每个天线每符号发送的比特数。
    • 76. 发明授权
    • Search efficient MIMO trellis decoder
    • 搜索高效的MIMO网格解码器
    • US07668267B2
    • 2010-02-23
    • US11942283
    • 2007-11-19
    • James GardnerVincent Knowles Jones, IVDidier Johannes Richard Van NeeGeert Arnout Awater
    • James GardnerVincent Knowles Jones, IVDidier Johannes Richard Van NeeGeert Arnout Awater
    • H04B7/10
    • H03M13/256H03M13/3905
    • A decoder generates distance and label metrics associated with each label of a coset transmitted in a multi-input multi-output communication system having Mt transmit antennas and Mr receive antennas by performing 2(“u+n”)(Mt−1) searches, where n is the number of encoded bits used to identify one of 2u cosets at the transmitting end and u is the number of unencoded bits used to select one of 2u labels at the transmitting end. The decoder forms an intermediate vector quantity associated with one of the transmit antennas to compute the metrics associated with each of the remaining transmit antennas. The decoder then forms a second intermediate vector quantity to compute the metrics associated with the transmit antenna that was used to form the first intermediate variable. The metrics so computed are used by a Viterbi decoder to identify the coset and the most likely transmitted label in that coset.
    • 解码器通过执行2(“u + n”)(Mt-1)搜索,生成与具有Mt个发送天线和Mr个接收天线的多输入多输出通信系统中发送的陪集的每个标签相关联的距离和标签量度, 其中n是用于识别发送端的2u陪集中的一个的编码比特数,u是用于在发送端选择2u个标签之一的未编码比特数。 解码器形成与发射天线之一相关联的中间矢量,以计算与每个剩余发射天线相关联的度量。 然后,解码器形成第二中间矢量,以计算与用于形成第一中间变量的发射天线相关联的度量。 如此计算的度量被维特比解码器用于识别该陪集中的陪集和最可能发送的标签。
    • 80. 发明授权
    • System for soft symbol decoding with MIMO log-map detection
    • 用于利用MIMO对数映射检测进行软符号解码的系统
    • US07649966B2
    • 2010-01-19
    • US11965511
    • 2007-12-27
    • Didier Johannes Richard van NeeVincent Knowles Jones, IVGeert Arnout AwaterJames Gardner
    • Didier Johannes Richard van NeeVincent Knowles Jones, IVGeert Arnout AwaterJames Gardner
    • H04L27/06H04L1/02
    • H04L27/2032H04L25/03006H04L25/067H04L2025/03414H04L2025/03426
    • A soft symbol decoder for use in a multiple input multiple output (MIMO) and OFDM (orthogonal frequency division multiplexing) system. The decoder generates soft symbol values for a digital signal that represents a number of source bits. The source bits are transmitted as symbols in corresponding to points in a signaling constellation. Soft metrics are determined by searching for all possible multi-dimensional symbols that could have been transmitted. The method includes transmitting a sample of the multi-dimensional symbol using K transmit antennas. The multi-dimensional symbol is represent-able as a complex, K-dimensional vector x. Each vector component of vector x represents a signal transmitted with one of the K transmit antennas. After transmission through a communication channel, a sample corresponding to the transmitted sample is received. The received sample is represented by a complex, N-dimensional vector y, where N is the number of receive antennas in the MIMO system. After the sample is received, a soft metric L(bi) is determined for each bit bi encoded by x according to the equation: L ⁡ ( b i ) = σ - 2 · ( min x j | b i = - 1 ⁢  y - Hx j  2 - min x j | b i = + 1 ⁢  y - Hx j  2 ) , , and ⁢ ⁢ x j represents all possible values for x. In addition, a reduced complexity method is used for providing soft metric values in the MIMO system. This exemplary aspect reduces the complexity of the above computations from 2BK to 2B(K−1), where B is the number of bits transmitted per symbol per antenna.
    • 一种用于多输入多输出(MIMO)和OFDM(正交频分复用)系统的软符号解码器。 解码器产生表示多个源位的数字信号的软符号值。 源比特在对应于信令星座中的点被作为符号发送。 通过搜索可能已经发送的所有可能的多维符号来确定软度量。 该方法包括使用K个发送天线发送多维符号的采样。 多维符号可以表示为复杂的K维向量x。 矢量x的每个矢量分量表示与K个发射天线中的一个发射的信号。 在通过通信信道传输之后,接收对应于发送的样本的样本。 接收的样本由复数N维向量y表示,其中N是MIMO系统中的接收天线的数量。 在接收到样本之后,根据以下等式为由x编码的每个比特bi确定软度量L(bi):L⁡(b i)= sigma-2。 (min x j | b i = - 1y - Hx j2 - min x j | b i = +1y - Hx j2),,而且,x x代表x的所有可能值。 另外,降低复杂度的方法用于在MIMO系统中提供软度量值。 该示例性方面降低了从2BK到2B(K-1)的上述计算的复杂度,其中B是每个天线每符号发送的比特数。