公开(公告)号：US20060120439A1

公开(公告)日：2006-06-08

申请号：US11328590

申请日：2006-01-09

申请人： John Smee ,  Nagabhushana Sindhushayana

发明人： John Smee ,  Nagabhushana Sindhushayana

IPC分类号： H04B1/707

CPC分类号： H04B7/0848 ,  H04B1/71055 ,  H04B7/0851 ,  H04B7/0854 ,  H04B7/0857 ,  Y02D70/21 ,  Y02D70/40 ,  Y02D70/444

摘要： Method and apparatus to compute the combiner coefficients for wireless communication systems for a space-time solution. One embodiment trains the weights on a signal known a priori that is time multiplexed with other signals, such as a pilot signal in a High Data Rate, HDR, system, wherein the signal is transmitted at full power. A Minimizing Mean Square Error, MMSE, approach is applied allowing weight combining on a per path basis. The weights are calculated as a function of a noise correlation matrix and spatial signature per path. The noise correlation matrix is determined from an autocorrelation matrix of the received signal. In one embodiment, the MMSE approach is applied to a non-time gated pilot signal.

摘要翻译： 用于计算时空解决方案的无线通信系统的组合器系数的方法和装置。 一个实施例对先前已知的与其他信号进行时间复用的信号（例如高数据速率，HDR，系统中的导频信号）来训练权重，其中信号以全功率发送。 应用最小化均方误差MMSE方法，允许基于每路径的权重组合。 权重作为噪声相关矩阵和每个路径的空间签名的函数计算。 从接收信号的自相关矩阵确定噪声相关矩阵。 在一个实施例中，将MMSE方法应用于非时间门控导频信号。

公开(公告)号：US20050003848A1

公开(公告)日：2005-01-06

申请号：US10889808

申请日：2004-07-12

申请人： Tao Chen ,  Jack Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles Wheatley

发明人： Tao Chen ,  Jack Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles Wheatley

IPC分类号： H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/20 ,  G05B9/02 ,  H04B7/00

CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常是软的）度量，指示接收到的信号质量和设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

公开(公告)号：US06763244B2

公开(公告)日：2004-07-13

申请号：US09810685

申请日：2001-03-15

申请人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

发明人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

IPC分类号： H04B116

CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常为软）度量，指示接收信号质量与设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

公开(公告)号：US06285861B1

公开(公告)日：2001-09-04

申请号：US09332857

申请日：1999-06-14

申请人： Mario Bonaccorso ,  Fuyun Ling ,  Nagabhushana Sindhushayana ,  Peter Black

发明人： Mario Bonaccorso ,  Fuyun Ling ,  Nagabhushana Sindhushayana ,  Peter Black

IPC分类号： H04B1702

CPC分类号： H04B1/7115 ,  H04B1/712 ,  H04B7/0854

摘要： An optimum combiner that reduces the amount of interference imposed upon a first base station by transmissions of other base stations within the same communication system. Two antennas are used to receive transmissions within a receiving station. A rake receiver is coupled to each antenna. By optimally combining the signals that are received by each independent finger of the rake receiver, interference that is correlated between a finger associated with the first antenna and a finger associated with the second antenna can be minimized with respect to the desired signal. Optimum combining requires determination of optimum combining coefficients.

公开(公告)号：US20160294506A1

公开(公告)日：2016-10-06

申请号：US15178353

申请日：2016-06-09

申请人： Nagabhushana Sindhushayana ,  Peter Black

发明人： Nagabhushana Sindhushayana ,  Peter Black

IPC分类号： H04L1/00 ,  H04L5/00

CPC分类号： H04L1/0002 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/005 ,  H04L1/0059 ,  H04L1/0066 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/0083 ,  H04L1/18 ,  H04L5/0048

摘要： In a transmission scheme wherein multi-slot packet transmissions to a remote station can be terminated by an acknowledgment signal from the remote station, code symbols can be efficiently packed over the multi-slot packet so that the remote station can easily decode the data payload of the multi-slot packet by decoding only a portion of the multi-slot packet. Hence, the remote station can signal for the early termination of the multi-slot packet transmission, which thereby increases the data throughput of the system.

摘要翻译： 在其中向远程站的多时隙分组传输可以由来自远程站的确认信号终止的传输方案中，可以将代码符号有效地打包在多时隙分组上，使得远程站可以容易地解码数据有效载荷 所述多时隙分组仅解码所述多时隙分组的一部分。 因此，远程站可以发信号通知多时隙分组传输的提前终止，从而增加系统的数据吞吐量。

公开(公告)号：US07643842B2

公开(公告)日：2010-01-05

申请号：US10889808

申请日：2004-07-12

申请人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

发明人： Tao Chen ,  Jack M. Holtzman ,  Fuyun Ling ,  Keith Saints ,  Nagabhushana Sindhushayana ,  Charles E. Wheatley, III

IPC分类号： H04B1/16 ,  H04W52/18

CPC分类号： H04W52/12 ,  H04L1/0051 ,  H04L1/0066 ,  H04L1/208 ,  H04W52/20 ,  H04W52/36

摘要： Techniques to adjust the setpoint of a power control loop in a wireless communication system. The setpoint may be adjusted based on frame status indicative of erased/good decoded frames, one or more (typically soft) metrics indicative of the confidence in the decoded results, power surplus/deficit indicative of the difference between the received signal quality and the setpoint, setpoint surplus/deficit indicative of the difference between the setpoint and a threshold Eb/Nt needed for the desired level of performance, or a combination thereof. The metrics may include re-encoded symbol error rate, re-encoded power metric, modified Yamamoto metric, minimum or average LLR among decoded bits, number of decoding iterations, and possibly others. The setpoint may be adjusted in different manners and/or by different amounts depending on the above-noted factors. The techniques may be employed for forward and/or reverse links in CDMA systems.

摘要翻译： 调整无线通信系统中功率控制回路设定值的技术。 可以基于指示擦除/良好解码帧的帧状态来调整设定点，指示解码结果的置信度的一个或多个（通常是软的）度量，指示接收到的信号质量和设定点之间的差异的功率余量/ ，表示设定值与所需性能水平所需的阈值Eb / Nt之间的差异的设定值剩余/缺失，或其组合。 度量可以包括重新编码的符号错误率，重新编码的功率度量，修改的Yamamoto度量，解码比特中的最小或平均LLR，解码迭代次数，以及可能的其他值。 可以根据上述因素以不同的方式和/或不同的量调节设定点。 这些技术可以用于CDMA系统中的前向和/或反向链路。

公开(公告)号：US07583744B2

公开(公告)日：2009-09-01

申请号：US11671459

申请日：2007-02-05

申请人： Nagabhushana Sindhushayana

发明人： Nagabhushana Sindhushayana

IPC分类号： H04L5/12

CPC分类号： H04L1/005 ,  H03M13/2957 ,  H03M13/3927 ,  H03M13/3961 ,  H03M13/6325 ,  H03M13/6337 ,  H03M13/65 ,  H04L1/0066 ,  H04L25/067 ,  H04L27/22 ,  H04L27/38

摘要： A method and apparatus for computing soft decision input metrics to a turbo decoder includes circuits associated with eight-ary phase shift keyed (8PSK) modulation and sixteen-ary quadrature amplitude modulation (16QAM). In both implementations log-likelihood ratio (LLR) metrics on code symbols are estimated as products of various constant values and various combinations of the in-phase and quadrature components of a demodulated soft decision. In the implementation associated with the 16QAM modulation scheme, an estimate of the carrier-signal-to-interference (C/I) ratio is also used to estimate some of the LLR metrics. Estimates of the LLR metrics may also be obtained in association with generalized square QAM and M-ary PSK modulation schemes including, e.g., 64QAM, 256QAM, and 16PSK.

摘要翻译： 用于向turbo解码器计算软判决输入度量的方法和装置包括与八进相移键控（8PSK）调制和十六进制正交幅度调制（16QAM）相关联的电路。 在两种实现中，代码符号上的对数似然比（LLR）度量被估计为解调软判决的各种常数值和同相和正交分量的各种组合的乘积。 在与16QAM调制方案相关的实现中，载波信号对干扰（C / I）比的估计也用于估计一些LLR度量。 还可以与包括例如64QAM，256QAM和16PSK的广义正​​方形QAM和M元PSK调制方案相关联地获得LLR度量的估计。

公开(公告)号：US20080101307A1

公开(公告)日：2008-05-01

申请号：US11864792

申请日：2007-09-28

申请人： Nagabhushana Sindhushayana ,  Alexei Gorokhov

发明人： Nagabhushana Sindhushayana ,  Alexei Gorokhov

IPC分类号： H04B7/212

CPC分类号： H04W16/02 ,  H04L27/2626 ,  H04W52/346

摘要： Partitioning resources so that they can be operated in different modes and synchronizing these partitioning among different sectors so that they can employ mutually cooperative power allocation settings are provided. The resources can be partitioned into one of two modes, namely, block mode or distributed mode. A user can be synchronized according to the mode and a zone, which can be based in part on the mode. The synchronization can be based on bit reversal order or quasi-uniform spacing of tones.

摘要翻译： 分配资源使得它们可以以不同的模式操作并且在不同扇区之间同步这些分区，从而提供它们可以采用相互协调的功率分配设置。 资源可以分为两种模式之一，即块模式或分布式模式。 用户可以根据模式和区域进行同步，区域可以部分基于模式。 同步可以基于位反转顺序或音调的准均匀间隔。

公开(公告)号：US20070168825A1

公开(公告)日：2007-07-19

申请号：US11518329

申请日：2006-09-07

申请人： Ahmad Jalali ,  Eduardo Esteves ,  Nagabhushana Sindhushayana ,  Peter Black ,  Rashid Attar

发明人： Ahmad Jalali ,  Eduardo Esteves ,  Nagabhushana Sindhushayana ,  Peter Black ,  Rashid Attar

IPC分类号： H04L1/18 ,  G08C25/02

CPC分类号： H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

摘要： A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission.

摘要翻译： 公开了一种在通信系统中快速重发信号的方法和装置。 发送终端（例如基站）以分组的形式向接收终端（例如，用户台）发送信号。 接收终端确定分组是否用于接收终端，如果是，则接收终端解调分组。 接收终端然后计算分组的质量度量，并将计算的质量度量与分组中包含的质量度量进行比较。 如果质量度量匹配，则报文被正确地接收，并被转发用于进一步的处理。 如果质量度量不匹配，则接收终端发送分组请求。 发送终端根据重传请求确定哪个分组需要重传。 然后，发送终端调度分组进行重传。

公开(公告)号：US20070153687A1

公开(公告)日：2007-07-05

申请号：US11686772

申请日：2007-03-15

申请人： Rashid Attar ,  Rajiv Vijayan ,  Roberto Padovani ,  Nagabhushana Sindhushayana ,  Qiang Wu ,  Peter Black ,  Eduardo Esteves

发明人： Rashid Attar ,  Rajiv Vijayan ,  Roberto Padovani ,  Nagabhushana Sindhushayana ,  Qiang Wu ,  Peter Black ,  Eduardo Esteves

IPC分类号： H04L12/26 ,  H04Q7/00

CPC分类号： H04W48/20 ,  H04L1/20 ,  H04W52/24 ,  H04W52/26

摘要： Methods and apparatus for selecting a serving sector in a high rate data (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which a sector of an Access Point may send data packets to an Access Terminal. The sector is selected by the Access Terminal to achieve the highest data throughput while maintaining a targeted packet error rate. The Access Terminal employs various methods to evaluate quality metrics of forward and reverse links from and to different sectors, and uses the quality metrics to select the sector to send data packets to the Access Terminal.

摘要翻译： 公开了在高速率数据（HDR）通信系统中选择服务扇区的方法和装置。 示例性HDR通信系统定义了一组数据速率，在该组数据速率下，接入点的扇区可以向接入终端发送数据分组。 访问终端选择该扇区以实现最高的数据吞吐量，同时保持目标分组错误率。 接入终端采用各种方法来评估来自不同扇区的前向和反向链路的质量度量，并使用质量度量来选择扇区将数据分组发送到接入终端。