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公开(公告)号：US08254977B2
公开(公告)日：2012-08-28
申请号：US11441651
申请日：2006-05-25
CPC分类号： H04W52/343 , H04W52/367
摘要： A novel MAC algorithm is disclosed having various features for a modern CDMA interference-shared reverse link, including (a) link quality assurance, (b) individual congestion control, (c) variable data rate transition policy, and/or (d) reverse link partitioning. Link quality assurance is provided by monitoring transmission feedback information (ACK/NACK) to indirectly determine the quality of a communication link. Wireless devices are individually targeted to perform congestion control of the reverse link. Variable data transmission rates and discontinuous transmissions are achieved by individual wireless devices that autonomously adjust their transmission rate and transmit power. The reverse link can also be partitioned among the different wireless devices by individually controlling the transmit power of the wireless devices operating on the reverse link.
摘要翻译： 公开了一种新颖的MAC算法，其具有用于现代CDMA干扰共享反向链路的各种特征，包括（a）链路质量保证，（b）个体拥塞控制，（c）可变数据速率转换策略和/或（d）反向 链接分区。 通过监视传输反馈信息（ACK / NACK）来间接地确定通信链路的质量来提供链路质量保证。 无线设备被单独定向以执行反向链路的拥塞控制。 可变数据传输速率和不连续传输通过自主调整其传输速率和传输功率的各个无线设备实现。 也可以通过单独控制在反向链路上操作的无线设备的发射功率，在不同的无线设备之间对反向链路进行分区。
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公开(公告)号：US07929646B2
公开(公告)日：2011-04-19
申请号：US11441653
申请日：2006-05-25
IPC分类号： H04L27/06
CPC分类号： H03M13/3905 , H03M13/3723 , H03M13/3972 , H03M13/6561
摘要： A MAP decoder, or a turbo decoder having constituted MAP decoders, is configured with bi-directional sliding windows. A sliding window architecture is applied to the forward state metric (FSM) calculation of an encoded data block having a trellis with N time-steps. The data block is divided into smaller sub-blocks and a forward recursion of two or more of the sub-blocks are performed in parallel to obtain FSMs. Each sub-block overlaps with a previous sub-block by k time-steps, where k is an integer value greater than zero. This provides a good approximation of the FSMs at time-step k+t of the sub-block. The FSMs associated with the first k time steps of each sub-block, other than the first sub-block, are discarded. A reverse recursion of each sub-block is also performed to obtain reverse state metrics (RSM) for the sub-block. Likelihood ratios are then calculated based on the FSMs and RSMs.
摘要翻译： 具有MAP解码器的MAP解码器或turbo解码器配置有双向滑动窗口。 将滑动窗口架构应用于具有N个时间步长的网格的编码数据块的前向状态度量（FSM）计算。 将数据块划分为更小的子块，并行执行两个或更多个子块的正向递归，以获得FSM。 每个子块与先前的子块重叠k个时间步长，其中k是大于零的整数值。 这提供了子块的时间步长k + t处的FSM的良好近似。 与除第一子块之外的每个子块的第一k个时间步长相关联的FSM被丢弃。 还执行每个子块的反向递归以获得子块的反向状态度量（RSM）。 然后根据FSM和RSM计算似然比。
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