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公开(公告)号：US20070230544A1
公开(公告)日：2007-10-04
申请号：US11761329
申请日：2007-06-11
CPC分类号： H04L25/0228 , H04B1/7117 , H04B2201/70701 , H04L25/0214
摘要： Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.
摘要翻译： 用于以“自适应”方式滤波导频的导频符号以提供对通信信道的响应的改进估计的技术。 接收到的信号可能在不同时间经历不同的信道条件，即使在接收时间短的情况下，不同的多路径也可能经历不同的信道条件。 使用具有自适应响应的导频滤波器来提供信道响应的改进的估计。 可以使用各种自适应导频滤波方案。 在第一方案中，基于接收到的导频的质量来估计信道条件。 在第二方案中，基于导频估计的质量（即，滤波的导频符号）来估计信道条件。 对于每个方案，基于所接收的导频或导频估计的估计质量来选择特定的滤波器响应。
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公开(公告)号：US07583756B2
公开(公告)日：2009-09-01
申请号：US11761329
申请日：2007-06-11
CPC分类号： H04L25/0228 , H04B1/7117 , H04B2201/70701 , H04L25/0214
摘要： Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.
摘要翻译： 用于以“自适应”方式滤波导频的导频符号以提供对通信信道的响应的改进估计的技术。 接收到的信号可能在不同时间经历不同的信道条件，即使在接收时间短的情况下，不同的多路径也可能经历不同的信道条件。 使用具有自适应响应的导频滤波器来提供信道响应的改进的估计。 可以使用各种自适应导频滤波方案。 在第一方案中，基于接收到的导频的质量来估计信道条件。 在第二方案中，基于导频估计的质量（即，滤波的导频符号）来估计信道条件。 对于每个方案，基于所接收的导频或导频估计的估计质量来选择特定的滤波器响应。
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公开(公告)号：US07230975B2
公开(公告)日：2007-06-12
申请号：US09924199
申请日：2001-08-07
CPC分类号： H04L25/0228 , H04B1/7117 , H04B2201/70701 , H04L25/0214
摘要： Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.
摘要翻译： 用于以“自适应”方式滤波导频的导频符号以提供对通信信道的响应的改进估计的技术。 接收到的信号可能在不同时间经历不同的信道条件，即使在接收时间短的情况下，不同的多路径也可能经历不同的信道条件。 使用具有自适应响应的导频滤波器来提供信道响应的改进的估计。 可以使用各种自适应导频滤波方案。 在第一方案中，基于接收到的导频的质量来估计信道条件。 在第二方案中，基于导频估计的质量（即，滤波的导频符号）来估计信道条件。 对于每个方案，基于所接收的导频或导频估计的估计质量来选择特定的滤波器响应。
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公开(公告)号：US20050079846A1
公开(公告)日：2005-04-14
申请号：US10684771
申请日：2003-10-14
申请人： Andrew Sendonaris , Da-shan Shiu , Dominic Farmer , Jeremy Lin , Parvathanathan Subrahmanya , Thomas Rowland
发明人： Andrew Sendonaris , Da-shan Shiu , Dominic Farmer , Jeremy Lin , Parvathanathan Subrahmanya , Thomas Rowland
CPC分类号： H04L27/0014 , G01S19/235 , H04B1/3805 , H04L2027/0077
摘要： Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error.
摘要翻译： 公开了与无线通信有关的系统和技术。 这些系统和技术涉及无线通信，其中设备可以被配置为使用参考信号从载波恢复信息信号，检测信息信号中的频率误差; 并定期调谐参考信号以减少频率误差。
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5.发明授权公开(公告)号：US07376438B2
公开(公告)日：2008-05-20
申请号：US11249786
申请日：2005-10-12
CPC分类号： H04W52/12 , H04W52/20 , H04W52/267 , H04W52/283 , H04W52/286 , H04W52/44
摘要： Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.
摘要翻译： 用于更有效地控制使用多种格式（例如，速率，传输格式）的数据传输的发射功率的技术。 给定数据信道（例如，传输信道）的不同格式可能需要不同的目标SNIR来实现特定的BLER。 在一个方面，可以为每个数据信道的每个格式指定单个目标BLER。 在另一方面，提供各种功率控制方案以实现用于不同格式的不同目标SNIR。 在第一功率控制方案中，为多种格式维护多个单独的外环。 对于每个格式，其关联的外部循环尝试设置目标SNIR，使得为该格式指定的目标BLER被实现。 在第二功率控制方案中，保持多个单独的外环，并且基站进一步对不同格式的发射功率电平进行不同的调整。
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公开(公告)号：US07155177B2
公开(公告)日：2006-12-26
申请号：US10364638
申请日：2003-02-10
CPC分类号： H04B7/0634
摘要： Techniques for predicting weights used for closed-loop transmit diversity. In a channel prediction scheme, channel gains for multiple transmit antennas are initially estimated (e.g., based on pilots received from these antennas) and used to derive predicted channel gains for a future time instant. The predicted channel gains are then used to derive predicted weights that are deemed to be “optimal” at the future time instant. Optimality may be determined based on one or more criteria, such as maximizing a received SNR for the received signals. In a weight prediction scheme, the channel gains for the multiple antennas are estimated and used to compute optimal weights for the current time instant. The current optimal weights are then used to predict the optimal weights at the future time instant. For both schemes, the prediction may be performed based on an adaptive filter (e.g., LMS or RLS filter) or a non-adaptive filter.
摘要翻译： 用于预测用于闭环发射分集的权重的技术。 在信道预测方案中，最初估计多个发射天线的信道增益（例如，基于从这些天线接收的导频），并用于在未来时刻导出预测的信道增益。 然后，预测的信道增益用于导出在未来时刻被认为是“最佳”的预测权重。 可以基于一个或多个准则来确定最优性，例如为接收到的信号最大化接收到的SNR。 在权重预测方案中，估计多个天线的信道增益并用于计算当前时刻的最优权重。 然后使用当前的最优权重来预测未来时刻的最优权重。 对于这两种方案，可以基于自适应滤波器（例如，LMS或RLS滤波器）或非自适应滤波器来执行预测。
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7.发明申请Power control for multiple transport channels in a wireless communication system 有权无线通信系统中多个传输信道的功率控制公开(公告)号：US20050143116A1
公开(公告)日：2005-06-30
申请号：US10750302
申请日：2003-12-30
申请人： Chih-Ping Hsu , Parvathanathan Subrahmanya , Da-shan Shiu , Hyukjun Oh , Christopher Riddle , Nitin Kasturi
发明人： Chih-Ping Hsu , Parvathanathan Subrahmanya , Da-shan Shiu , Hyukjun Oh , Christopher Riddle , Nitin Kasturi
摘要： Techniques are provided to control the transmit power for data transmission on multiple transport channels having different signal quality (SIR) targets. A single SIR target is maintained for all transport channels, and this SIR target is adjusted based only on active transport channels. For each update interval, a data processor processes at least one data block received in the current update interval on at least one of the transport channels and provides the status of each received data block. A controller increases the SIR target based on an up step if any received data block is erased and decreases the SIR target based on a down step if all received data blocks are good. If any received data block is erased, the down step used to adjust the SIR target may be set to the smallest down step size required by all transport channels with erased data blocks.
摘要翻译： 提供技术来控制具有不同信号质量（SIR）目标的多个传输信道上的数据传输的发射功率。 对于所有传输信道维持单个SIR目标，并且该SIR目标仅基于主动传输信道进行调整。 对于每个更新间隔，数据处理器处理在当前更新间隔中在至少一个传输信道上接收的至少一个数据块，并提供每个接收到的数据块的状态。 如果任何接收的数据块被擦除，则控制器基于上升步骤增加SIR目标，并且如果所有接收到的数据块都良好，则基于下降步骤降低SIR目标。 如果任何接收到的数据块被擦除，则用于调整SIR目标的下降步骤可以被设置为具有被擦除的数据块的所有传输信道所需的最小的下降步长。
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8.发明授权Power control for multiple transport channels in a wireless communication system 有权无线通信系统中多个传输信道的功率控制公开(公告)号：US07664519B2
公开(公告)日：2010-02-16
申请号：US10750302
申请日：2003-12-30
申请人： Chih-Ping Hsu , Parvathanathan Subrahmanya , Da-shan Shiu , Hyukjun Oh , Christopher C. Riddle , Nitin Kasturi
发明人： Chih-Ping Hsu , Parvathanathan Subrahmanya , Da-shan Shiu , Hyukjun Oh , Christopher C. Riddle , Nitin Kasturi
摘要： Techniques are provided to control the transmit power for data transmission on multiple transport channels having different signal quality (SIR) targets. A single SIR target is maintained for all transport channels, and this SIR target is adjusted based only on active transport channels. For each update interval, a data processor processes at least one data block received in the current update interval on at least one of the transport channels and provides the status of each received data block. A controller increases the SIR target based on an up step if any received data block is erased and decreases the SIR target based on a down step if all received data blocks are good. If any received data block is erased, the down step used to adjust the SIR target may be set to the smallest down step size required by all transport channels with erased data blocks.
摘要翻译： 提供技术来控制具有不同信号质量（SIR）目标的多个传输信道上的数据传输的发射功率。 对于所有传输信道维持单个SIR目标，并且该SIR目标仅基于主动传输信道进行调整。 对于每个更新间隔，数据处理器处理在当前更新间隔中在至少一个传输信道上接收的至少一个数据块，并提供每个接收到的数据块的状态。 如果任何接收的数据块被擦除，则控制器基于上升步骤增加SIR目标，并且如果所有接收到的数据块都良好，则基于下降步骤降低SIR目标。 如果任何接收到的数据块被擦除，则用于调整SIR目标的下降步骤可以被设置为具有被擦除的数据块的所有传输信道所需的最小的下降步长。
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9.发明申请公开(公告)号：US20080233995A1
公开(公告)日：2008-09-25
申请号：US12111092
申请日：2008-04-28
IPC分类号： H04B7/00
CPC分类号： H04W52/12 , H04W52/20 , H04W52/267 , H04W52/283 , H04W52/286 , H04W52/44
摘要： Techniques to more efficiently control the transmit power for a data transmission that uses a number of formats (e.g., rates, transport formats). Different formats for a given data channel (e.g., transport channel) may require different target SNIRs to achieved a particular BLER. In one aspect, individual target BLER may be specified for each format of each data channel. In another aspect, various power control schemes are provided to achieve different target SNIRs for different formats. In a first power control scheme, multiple individual outer loops are maintained for multiple formats. For each format, its associated outer loop attempts to set the target SNIR such that the target BLER specified for that format is achieved. In a second power control scheme, multiple individual outer loops are maintained and the base station further applies different adjustments to the transmit power levels for different formats.
摘要翻译： 用于更有效地控制使用多种格式（例如，速率，传输格式）的数据传输的发射功率的技术。 给定数据信道（例如，传输信道）的不同格式可能需要不同的目标SNIR来实现特定的BLER。 在一个方面，可以为每个数据信道的每个格式指定单个目标BLER。 在另一方面，提供各种功率控制方案以实现用于不同格式的不同目标SNIR。 在第一功率控制方案中，为多种格式维护多个单独的外环。 对于每个格式，其关联的外部循环尝试设置目标SNIR，使得为该格式指定的目标BLER被实现。 在第二功率控制方案中，保持多个单独的外环，并且基站进一步对不同格式的发射功率电平进行不同的调整。
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公开(公告)号：US07251467B2
公开(公告)日：2007-07-31
申请号：US10684771
申请日：2003-10-14
申请人： Andrew Sendonaris , Da-shan Shiu , Dominic Gerard Farmer , Jeremy H. Lin , Parvathanathan Subrahmanya , Thomas K. Rowland
发明人： Andrew Sendonaris , Da-shan Shiu , Dominic Gerard Farmer , Jeremy H. Lin , Parvathanathan Subrahmanya , Thomas K. Rowland
CPC分类号： H04L27/0014 , G01S19/235 , H04B1/3805 , H04L2027/0077
摘要： Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error.
摘要翻译： 公开了与无线通信有关的系统和技术。 这些系统和技术涉及无线通信，其中设备可以被配置为使用参考信号从载波恢复信息信号，检测信息信号中的频率误差; 并定期调谐参考信号以减少频率误差。
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