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    Preamble design for television white space transmissions
    1.
    发明授权
    Preamble design for television white space transmissions 有权
    电视空白传输的序言设计

    公开(公告)号：US08830815B2

    公开(公告)日：2014-09-09

    申请号：US13471947

    申请日：2012-05-15

    申请人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    发明人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    IPC分类号： H04J11/00 ,  H04L5/00 ,  H04L29/06 ,  H04L27/26 ,  H04W4/00

    CPC分类号： H04L69/00 ,  H04L5/0053 ,  H04L27/2602 ,  H04W4/00

    摘要： A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译： 提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS
    2.
    发明申请
    PREAMBLE DESIGN FOR TELEVISION WHITE SPACE TRANSMISSIONS 有权
    电视白空间传输的前置设计

    公开(公告)号：US20130128807A1

    公开(公告)日：2013-05-23

    申请号：US13471947

    申请日：2012-05-15

    申请人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    发明人： Sameer Vermani ,  Santosh Paul Abraham ,  Stephen J. Shellhammer ,  Albert van Zelst ,  Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV

    IPC分类号： H04L12/56 ,  H04W4/00

    CPC分类号： H04L69/00 ,  H04L5/0053 ,  H04L27/2602 ,  H04W4/00

    摘要： A method for generating a Physical Layer Convergence Protocol Packet Data Unit (PPDU) having a preamble and a payload for television white space transmission (TVWS) is provided. The symbols of the PPDU each include 128 total (orthogonal frequency-division multiplexing) OFDM tones or 256 total OFDM tones. The preamble includes a signal (SIG) field symbol having 108 OFDM data tones if the symbols of the PPDU include 128 total OFDM tones or having 234 OFDM data tones if the symbols of the PPDU include 256 total OFDM tones. The SIG field symbol indicates at least one of an amount of data in the payload or a length of time that the PPDU will occupy the television broadcast frequency spectrum. The PPDU is generated by down-clocking an 802.11ac signal by a factor so that the bandwidth of the PPDU decreases down to one appropriate for use in a TVWS channel.

    摘要翻译： 提供了一种用于产生具有用于电视白空间传输（TVWS）的前同步码和有效载荷的物理层汇聚协议分组数据单元（PPDU）的方法。 PPDU的符号各自包括128个总共（正交频分复用）OFDM音调或256个总OFDM音调。 如果PPDU的符号包括128个总OFDM音调或具有234个OFDM数据音调，如果PPDU的符号包括256个总OFDM音调，则前导码包括具有108个OFDM数据音调的信号（SIG）字段符号。 SIG字段符号指示有效载荷中的数据量或PPDU将占用电视广播频谱的时间长度中的至少一个。 PPDU是通过将802.11ac信号衰减一个因子来产生的，使得PPDU的带宽减小到适合于在TVWS信道中使用的PPDU的带宽。

    SYSTEM FOR SOFT SYMBOL DECODING MIMO LOG-MAP DETECTION
    3.
    发明申请
    SYSTEM FOR SOFT SYMBOL DECODING MIMO LOG-MAP DETECTION 有权
    用于软件符号解码MIMO日志映射检测的系统

    公开(公告)号：US20100111234A1

    公开(公告)日：2010-05-06

    申请号：US12629282

    申请日：2009-12-02

    申请人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    发明人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2032 ,  H04L25/03006 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： 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.

    摘要翻译： 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）=＆sgr; - 2·（min x jb i = - 1y - Hx j2 - min x jb i = + 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。

    System for soft symbol decoding MIMO log-map detection
    4.
    发明授权
    System for soft symbol decoding MIMO log-map detection 有权
    用于软符号解码MIMO系统的对数映射检测

    公开(公告)号：US08483328B2

    公开(公告)日：2013-07-09

    申请号：US12629282

    申请日：2009-12-02

    申请人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    发明人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    IPC分类号： H04L27/06

    CPC分类号： H04L27/2032 ,  H04L25/03006 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： 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.

    摘要翻译： 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。

    System for soft symbol decoding with MIMO log-map detection
    5.
    发明授权
    System for soft symbol decoding with MIMO log-map detection 有权
    用于利用MIMO对数映射检测进行软符号解码的系统

    公开(公告)号：US07649966B2

    公开(公告)日：2010-01-19

    申请号：US11965511

    申请日：2007-12-27

    申请人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    发明人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    IPC分类号： H04L27/06 ,  H04L1/02

    CPC分类号： H04L27/2032 ,  H04L25/03006 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： 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.

    摘要翻译： 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。

    System for soft symbol decoding with MIMO log-map detection
    6.
    发明授权
    System for soft symbol decoding with MIMO log-map detection 有权

    公开(公告)号：US07315576B1

    公开(公告)日：2008-01-01

    申请号：US10376060

    申请日：2003-02-26

    申请人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    发明人： Didier Johannes Richard van Nee ,  Vincent Knowles Jones, IV ,  Geert Arnout Awater ,  James Gardner

    IPC分类号： H04L27/00 ,  H04L27/28 ,  H04L27/06 ,  H04B7/02

    CPC分类号： H04L27/2032 ,  H04L25/03006 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/03426

    摘要： 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.