Cognitive radio device and method for determining channel occupancy
    1.
    发明授权
    Cognitive radio device and method for determining channel occupancy 失效
    用于确定信道占用的认知无线电设备和方法

    公开(公告)号:US08780828B2

    公开(公告)日:2014-07-15

    申请号:US13119309

    申请日:2009-09-03

    摘要: A detector module (100) is operable in a cognitive radio device and capable of determining channel occupancy. The detector module comprises a sensor (110) for sensing incumbent signals at a variable sensing threshold, wherein the sensor generates a first occupancy indication indicating whether the channel includes an incumbent signal having a sensing metric above the variable sensing threshold; a geo-location unit (120) for generating a second occupancy indication based on a location of the detector module; and a decision unit (130) for generating an occupancy decision based on both the first occupancy indication and the second occupancy indication.

    摘要翻译: 检测器模块(100)可在认知无线电设备中操作并且能够确定信道占用。 检测器模块包括用于感测在可变感测阈值处的现有信号的传感器(110),其中传感器产生第一占用指示,指示信道是否包括具有高于可变感测阈值的感测度量的在线信号; 地理位置单元(120),用于基于所述检测器模块的位置产生第二占用指示; 以及用于基于所述第一占用指示和所述第二占用指示两者来生成占用决定的决定单元(130)。

    ROBUST SENSING OF DVB-T/H TRANSMISSIONS
    2.
    发明申请
    ROBUST SENSING OF DVB-T/H TRANSMISSIONS 有权
    DVB-T / H传输的鲁棒感测

    公开(公告)号:US20120057030A1

    公开(公告)日:2012-03-08

    申请号:US13319808

    申请日:2010-04-23

    IPC分类号: H04N17/00

    摘要: A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission. The method includes receiving an RF (radio frequency) signal in a selected channel (1101); creating signal samples from the received RF signal (1102); creating averaged samples from the signal samples, each averaged sample being an average of a predetermined number of signal samples that are separated by a minimum pilot pattern repetition period from one to the next signal sample (1103); correlating the averaged samples with a reference sequence (1104); and comparing a correlation result with a threshold correlation value (1105).

    摘要翻译: 提供了一种用于检测DVB(数字视频广播)传输的存在的方法和系统。 该方法包括在所选择的信道(1101)中接收RF(射频)信号; 从所接收的RF信号(1102)创建信号样本; 从所述信号样本创建平均样本,每个平均样本是由一个到下一个信号样本(1103)的最小导频模式重复周期分隔开的预定数量的信号样本的平均值; 将平均样本与参考序列相关(1104); 以及将相关结果与阈值相关值(1105)进行比较。

    METHOD OF PACKET RETRANSMISSION AND RECEPTION AND WIRELESS DEVICE EMPLOYING THE SAME
    3.
    发明申请
    METHOD OF PACKET RETRANSMISSION AND RECEPTION AND WIRELESS DEVICE EMPLOYING THE SAME 有权
    包装恢复方法和使用其的接收和无线装置

    公开(公告)号:US20100284340A1

    公开(公告)日:2010-11-11

    申请号:US12812640

    申请日:2009-01-23

    IPC分类号: H04W40/00

    摘要: A first wireless device communicates data to a second wireless device. The first wireless device employs at least one of a first interleaving scheme and a first sub-carrier mapping scheme to produce a first data packet from a first plurality of data bits, and transmits the first data packet to the second wireless device. When the first data packet is not received correctly by the second wireless device, then the first wireless device employs at least one of a second interleaving scheme and a second sub-carrier mapping scheme to create a second data packet from the first plurality of data bits, and transmits the second data packet to the second wireless device.

    摘要翻译: 第一无线设备将数据传送到第二无线设备。 第一无线设备采用第一交织方案和第一子载波映射方案中的至少一个从第一多个数据比特产生第一数据分组,并将第一数据分组发送到第二无线设备。 当第二无线设备未正确接收到第一数据分组时,第一无线设备采用第二交织方案和第二子载波映射方案中的至少一个从第一多个数据比特中产生第二数据分组 ,并将第二数据分组发送到第二无线设备。

    Joint channel and noise variance estimation in a wideband ofdm system
    4.
    发明申请
    Joint channel and noise variance estimation in a wideband ofdm system 失效
    在宽带系统中的联合信道和噪声方差估计

    公开(公告)号:US20060114981A1

    公开(公告)日:2006-06-01

    申请号:US10524178

    申请日:2003-07-31

    IPC分类号: H03K5/159

    摘要: A method and system for use in a wireless-local-area network (WLAN), for simultaneously estimating the unknown multi-path channel and noise characteristics and using the channel and noise estimates to improve system performance in the presence of narrowband interferers. Estimates are made for the unknown multi-path channel and noise characteristic without a-priori knowledge of the location of the interference in the band and this information is used to generate soft-metrics for a Viterbi decoder. By using the improved channel and noise estimates, the packet error rate (PER) of an 802.11g WLAN system may be maintained despite collisions with interfering packets thereby allowing the 802.11g system to be less sensitive to the interference.

    摘要翻译: 一种在无线局域网(WLAN)中使用的方法和系统,用于同时估计未知多径信道和噪声特性,并使用信道和噪声估计来改善存在窄带干扰源时的系统性能。 对未知的多路径信道和噪声特性进行估计,而无需对频带中的干扰位置的先验知识,并且该信息用于生成维特比解码器的软度量。 通过使用改进的信道和噪声估计,可以保持802.11g WLAN系统的分组错误率(PER),尽管与干扰分组冲突,从而允许802.11g系统对干扰较不敏感。

    Method of packet retransmission and reception and wireless device employing the same
    5.
    发明授权
    Method of packet retransmission and reception and wireless device employing the same 有权
    分组重传和接收方法以及采用该方法的无线设备

    公开(公告)号:US09397779B2

    公开(公告)日:2016-07-19

    申请号:US12812640

    申请日:2009-01-23

    摘要: A first wireless device communicates data to a second wireless device. The first wireless device employs at least one of a first interleaving scheme and a first sub-carrier mapping scheme to produce a first data packet from a first plurality of data bits, and transmits the first data packet to the second wireless device. When the first data packet is not received correctly by the second wireless device, then the first wireless device employs at least one of a second interleaving scheme and a second sub-carrier mapping scheme to create a second data packet from the first plurality of data bits, and transmits the second data packet to the second wireless device.

    摘要翻译: 第一无线设备将数据传送到第二无线设备。 第一无线设备采用第一交织方案和第一子载波映射方案中的至少一个从第一多个数据比特产生第一数据分组,并将第一数据分组发送到第二无线设备。 当第二无线设备未正确接收到第一数据分组时,第一无线设备采用第二交织方案和第二子载波映射方案中的至少一个从第一多个数据比特中产生第二数据分组 ,并将第二数据分组发送到第二无线设备。

    Joint channel and noise variance estimation in a wideband OFDM system
    6.
    发明授权
    Joint channel and noise variance estimation in a wideband OFDM system 失效
    宽带OFDM系统中的联合信道和噪声方差估计

    公开(公告)号:US07352730B2

    公开(公告)日:2008-04-01

    申请号:US10524178

    申请日:2003-07-31

    IPC分类号: H04Q7/24 H03K5/159

    摘要: A method and system for use in a wireless-local-area network (WLAN), for simultaneously estimating the unknown multi-path channel and noise characteristics and using the channel and noise estimates to improve system performance in the presence of narrowband interferers. Estimates are made for the unknown multi-path channel and noise characteristic without a-priori knowledge of the location of the interference in the band and this information is used to generate soft-metrics for a Viterbi decoder. By using the improved channel and noise estimates, the packet error rate (PER) of an 802.11g WLAN system may be maintained despite collisions with interfering packets thereby allowing the 802.11g system to be less sensitive to the interference.

    摘要翻译: 一种在无线局域网(WLAN)中使用的方法和系统,用于同时估计未知多径信道和噪声特性,并使用信道和噪声估计来改善存在窄带干扰源时的系统性能。 对未知的多路径信道和噪声特性进行估计,而无需对频带中的干扰位置的先验知识,并且该信息用于生成维特比解码器的软度量。 通过使用改进的信道和噪声估计,可以保持802.11g WLAN系统的分组错误率(PER),尽管与干扰分组冲突,从而允许802.11g系统对干扰较不敏感。

    TECHNIQUES FOR ENCODING PLCP HEADERS
    7.
    发明申请
    TECHNIQUES FOR ENCODING PLCP HEADERS 有权
    编码PLCP头的技术

    公开(公告)号:US20110317722A1

    公开(公告)日:2011-12-29

    申请号:US13254464

    申请日:2010-02-25

    IPC分类号: H04J3/24

    摘要: A method (400) and apparatus for encoding a block-based communication system header. A physical (PHY) layer header and a medium access control (MAC) header of the block-based communication system header are encoded to generate parity bits, wherein the PHY layer header includes at least cyclic prefix (CP) mode bits (S410). Parity bits are appended to the PHY layer header and the MAC layer header to generate a bit vector (S420). The bit vector is divided into at least two data blocks, wherein a first data block includes at least the CP mode bits (S430). A predefined number of tail bits are appended to each data block (S440). The two data blocks are mapped into at least two symbols, wherein the first data block is mapped to a first symbol, such that the first symbol is a first header symbol being transmitted (S450).

    摘要翻译: 一种用于编码基于块的通信系统报头的方法(400)和装置。 对基于块的通信系统头部的物理(PHY)层头部和介质访问控制(MAC)头部进行编码以产生奇偶校验位,其中,PHY层头部至少包括循环前缀(CP)模式比特(S410)。 奇偶校验位附加到PHY层报头和MAC层报头以产生位向量(S420)。 比特向量被划分为至少两个数据块,其中第一数据块至少包括CP模式比特(S430)。 每个数据块附加预定数量的尾比特(S440)。 两个数据块被映射到至少两个符号,其中第一数据块被映射到第一符号,使得第一符号是正被发送的第一标题符号(S450)。

    Techniques for encoding PLCP headers
    8.
    发明授权
    Techniques for encoding PLCP headers 有权
    PLCP头编码技术

    公开(公告)号:US09178659B2

    公开(公告)日:2015-11-03

    申请号:US13254464

    申请日:2010-02-25

    IPC分类号: H04J3/24 H04L1/00 H04L27/26

    摘要: A method (400) and apparatus for encoding a block-based communication system header. A physical (PHY) layer header and a medium access control (MAC) header of the block-based communication system header are encoded to generate parity bits, wherein the PHY layer header includes at least cyclic prefix (CP) mode bits (S410). Parity bits are appended to the PHY layer header and the MAC layer header to generate a bit vector (S420). The bit vector is divided into at least two data blocks, wherein a first data block includes at least the CP mode bits (S430). A predefined number of tail bits are appended to each data block (S440). The two data blocks are mapped into at least two symbols, wherein the first data block is mapped to a first symbol, such that the first symbol is a first header symbol being transmitted (S450).

    摘要翻译: 一种用于编码基于块的通信系统报头的方法(400)和装置。 对基于块的通信系统头部的物理(PHY)层头部和介质访问控制(MAC)头部进行编码以产生奇偶校验位,其中,PHY层头部至少包括循环前缀(CP)模式比特(S410)。 奇偶校验位附加到PHY层报头和MAC层报头以产生位向量(S420)。 比特向量被划分为至少两个数据块,其中第一数据块至少包括CP模式比特(S430)。 每个数据块附加预定数量的尾比特(S440)。 两个数据块被映射到至少两个符号,其中第一数据块被映射到第一符号,使得第一符号是正被发送的第一标题符号(S450)。

    Robust sensing of DVB-T/H transmissions
    9.
    发明授权
    Robust sensing of DVB-T/H transmissions 有权
    对DVB-T / H传输的鲁棒感应

    公开(公告)号:US08942336B2

    公开(公告)日:2015-01-27

    申请号:US13319808

    申请日:2010-04-23

    摘要: A method and system is provided for detecting the presence of a DVB (digital video broadcasting) transmission. The method includes receiving an RF (radio frequency) signal in a selected channel (1101); creating signal samples from the received RF signal (1102); creating averaged samples from the signal samples, each averaged sample being an average of a predetermined number of signal samples that are separated by a minimum pilot pattern repetition period from one to the next signal sample (1103); correlating the averaged samples with a reference sequence (1104); and comparing a correlation result with a threshold correlation value (1105).

    摘要翻译: 提供了一种用于检测DVB(数字视频广播)传输的存在的方法和系统。 该方法包括在所选择的信道(1101)中接收RF(射频)信号; 从所接收的RF信号(1102)创建信号样本; 从所述信号样本创建平均样本,每个平均样本是由一个到下一个信号样本(1103)的最小导频模式重复周期分隔开的预定数量的信号样本的平均值; 将平均样本与参考序列相关(1104); 以及将相关结果与阈值相关值(1105)进行比较。

    COGNITIVE RADIO DEVICE AND METHOD FOR DETERMINING CHANNEL OCCUPANCY
    10.
    发明申请
    COGNITIVE RADIO DEVICE AND METHOD FOR DETERMINING CHANNEL OCCUPANCY 失效
    认知无线电设备及确定通道业务的方法

    公开(公告)号:US20110170512A1

    公开(公告)日:2011-07-14

    申请号:US13119309

    申请日:2009-09-03

    IPC分类号: H04W72/04

    摘要: A detector module (100) is operable in a cognitive radio device and capable of determining channel occupancy. The detector module comprises a sensor (110) for sensing incumbent signals at a variable sensing threshold, wherein the sensor generates a first occupancy indication indicating whether the channel includes an incumbent signal having a sensing metric above the variable sensing threshold; a geo-location unit (120) for generating a second occupancy indication based on a location of the detector module; and a decision unit (130) for generating an occupancy decision based on both the first occupancy indication and the second occupancy indication.

    摘要翻译: 检测器模块(100)可在认知无线电设备中操作并且能够确定信道占用。 检测器模块包括用于感测在可变感测阈值处的现有信号的传感器(110),其中传感器产生第一占用指示,指示信道是否包括具有高于可变感测阈值的感测度量的在线信号; 地理位置单元(120),用于基于所述检测器模块的位置产生第二占用指示; 以及用于基于所述第一占用指示和所述第二占用指示两者来生成占用决定的决定单元(130)。