Beam combination methods and systems for adapting communication links to varying channel conditions
    15.
    发明授权
    Beam combination methods and systems for adapting communication links to varying channel conditions 有权
    光束组合方法和系统,用于使通信链路适应不同的信道条件

    公开(公告)号:US08510433B2

    公开(公告)日:2013-08-13

    申请号:US12941546

    申请日:2010-11-08

    IPC分类号: G06F15/16

    摘要: Methods and systems for rectifying deteriorated channel conditions on a communication link are described. In response to the detection of a link deterioration event, a cluster of beams about a currently utilized beam pair can be trialed to determine a suitable, alternate pair of beams on which to establish a communication link. In turn, in the case of a link blockage event, a set of beams having a relatively large azimuthal angle with respect to a currently utilized beam pair can be trialed to determine a suitable beam pair for further communication.

    摘要翻译: 描述了用于整流通信链路恶化的信道条件的方法和系统。 响应于链路劣化事件的检测,可以尝试关于当前使用的波束对的一束波束,以确定在其上建立通信链路的合适的一对波束。 反过来,在链路阻塞事件的情况下,可以对相对于当前利用的波束对具有相对大的方位角的一组波束进行试验,以确定用于进一步通信的合适的波束对。

    Codebook with nested structure
    16.
    发明授权
    Codebook with nested structure 有权
    嵌套结构的代码本

    公开(公告)号:US08374562B2

    公开(公告)日:2013-02-12

    申请号:US13524269

    申请日:2012-06-15

    IPC分类号: H04B1/04

    摘要: A multi-rank beamforming (MRBF) scheme in which the downlink channel is estimated and an optimal precoding matrix to be used by the MRBF transmitter is determined accordingly. The optimal precoding matrix is selected from a codebook of matrices having a recursive structure which allows for efficient computation of the optimal precoding matrix and corresponding Signal to Interference and Noise Ratio (SINR). The codebook also enjoys a small storage footprint. Due to the computational efficiency and modest memory requirements, the optimal precoding determination can be made at user equipment (UE) and communicated to a transmitting base station over a limited uplink channel for implementation over the downlink channel.

    摘要翻译: 相应地确定其中估计下行链路信道并由MRBF发射机使用的最佳预编码矩阵的多级波束成形(MRBF)方案。 从具有递归结构的矩阵码本中选择最佳预编码矩阵,其允许有效计算最佳预编码矩阵和对应的信号与干扰和噪声比(SINR)。 该码本还具有小的存储空间。 由于计算效率和适度的存储器要求,可以在用户设备(UE)进行最佳预编码确定,并通过有限的上行链路信道传送到发射基站,以通过下行链路信道实现。

    Hybrid ARQ transmission method with effective channel matrix and decision statistics resetting
    19.
    发明授权
    Hybrid ARQ transmission method with effective channel matrix and decision statistics resetting 有权
    具有有效信道矩阵和决策统计复位的混合ARQ传输方法

    公开(公告)号:US08255778B2

    公开(公告)日:2012-08-28

    申请号:US12435249

    申请日:2009-05-04

    IPC分类号: H03M13/15 H03M13/17 H03M13/45

    摘要: A method for decoding of multiple wireless signals by a chase combining hybrid-automatic-repeat-request CC-HARQ receiver includes demodulating wireless signals received from respective mobile sources using an effective channel matrix and decision statistics; updating log-likelihood-ratios LLRs and decoding the received codewords using the corresponding updated LLRs; determining set of correctly decoded codewords using a cyclic redundancy check; updating the effective channel matrix and decision statistics responsive to the step of determining; and resetting the effective channel matrix and decision statistics in the event that the number of decoding errors for a codeword exceeds its maximum limit after storing the updated LLRs of all remaining erroneously decoded codewords for which the number of decoding errors is below the respective maximum limit.

    摘要翻译: 通过追踪组合混合自动重复请求CC-HARQ接收机对多个无线信号进行解码的方法包括使用有效信道矩阵和判定统计解调从相应移动源接收的无线信号; 更新对数似然比LLR并使用相应的更新的LLR对接收的码字进行解码; 使用循环冗余校验来确定正确解码的码字集合; 响应于确定步骤更新有效信道矩阵和决策统计; 并且在存储解码错误数量低于相应最大限制的所有剩余的错误解码的码字的更新的LLR之后,在码字的解码错误的数量超过其最大限制的情况下重置有效信道矩阵和判定统计。

    Power Scaling for Retransmissions in Uplink MIMO Hybrid ARQ
    20.
    发明申请
    Power Scaling for Retransmissions in Uplink MIMO Hybrid ARQ 有权
    上行MIMO混合ARQ中的重传功率缩放

    公开(公告)号:US20120114030A1

    公开(公告)日:2012-05-10

    申请号:US13292659

    申请日:2011-11-09

    IPC分类号: H04L25/49 H04B17/00

    摘要: A method includes obtaining a precoder for retransmission of one codeword responsive to known precoding matrix P of rank r and modulation and coding scheme MCS assignments used in an original transmission, and a desired retransmission rank r′; and scaling power in the retransmission responsive to at least two of 1) information parameters Index of UL precoder in previous transmission, 2) rank r of uplink UL precoder in previous transmission, 3) MCS assignments in previous retransmission (MCSi), 4) rank r′ UL retransmission 5) number of retransmit antennas used thr codeword to be retransmitted x in previous transmission, 6) number of retransmit antennas x′ used for retransmission, 7) precoder for UL retransmission, 8) UL precoders and channel information for previous transmission, and 8) latest channel measurements.

    摘要翻译: 一种方法包括响应于已知的秩r的预编码矩阵P以及在原始传输中使用的调制和编码方案MCS分配以及期望的重传等级r',获得用于重传一个码字的预编码器。 并且响应于以前的传输中的UL预编码器的信息参数索引中的至少两个,2)先前传输中的上行链路UL预编码器的秩r,先前传输中的MCS分配(MCSi),4)等级 r'UL重传5)先前传输中要重传的码字x所使用的重传天线数量6)重传用的重传天线数x'7)用于UL重传的预编码器8)用于先前传输的UL预编码器和信道信息 ,和8)最新的频道测量。