公开(公告)号：US07376209B2

公开(公告)日：2008-05-20

申请号：US10456148

申请日：2003-06-06

申请人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

发明人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H03M13/3927 ,  H03M13/2957 ,  H03M13/658 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812 ,  H04L1/1825 ,  Y10S370/912

摘要： A method and an apparatus for scaling demodulated data symbols contained in a packet to generate scaled log-likelihood ratios for Turbo decoding are disclosed. A packet consists of one or more subpackets depending on the type of packet. Each subpacket is identified by a subpacket identification number. The payload size of the packet and the subpacket identification number may be determined by decoding a reverse rate indicator (RRI) channel. A scale factor which is associated with a specific subpacket identification number and a specific payload size results in a performance measure that is closest to an expected performance measure. The scale factor is used for scaling the demodulated data symbols to generate scaled log-likelihood ratios for Turbo decoding.

摘要翻译： 公开了一种用于缩放分组中包含的解调数据符号以产生用于Turbo解码的缩放对数似然比的方法和装置。 数据包由一个或多个子数据包组成，具体取决于数据包的类型。 每个子分组由子分组标识号码标识。 可以通过解码反向速率指示符（RRI）信道来确定分组的有效载荷大小和子分组标识号码。 与特定子分组标识号和特定有效载荷大小相关联的比例因子导致最接近预期性能测量的性能度量。 缩放因子用于缩放解调的数据符号以产生用于Turbo解码的缩放的对数似然比。

公开(公告)号：US20060233269A1

公开(公告)日：2006-10-19

申请号：US11174108

申请日：2005-06-29

申请人： Naga Bhushan ,  June Namgoong ,  Peter Black

发明人： Naga Bhushan ,  June Namgoong ,  Peter Black

IPC分类号： H04L27/28 ,  H04K1/10 ,  H04B1/707

CPC分类号： H04L27/2662 ,  H04L25/022 ,  H04L27/2665

摘要： In one embodiment, the invention comprises a channel estimation method, comprising determining a FFT window position, and calculating a delay spread. In another embodiment, the step of determining a FE window position comprises setting an initial position of the FFT window, computing an energy for each tap, time averaging said energy for each tap, comparing an average energy of each tap with a first threshold multiplied by the average energy of all taps, comparing the average energy of each tap with a second threshold multiplied by a maximum average energy in alias components, updating the set of paths if the average energy of the tap is greater than said second threshold multiplied by the maximum average energy in alias components; and refining the FFT window position.

摘要翻译： 在一个实施例中，本发明包括信道估计方法，包括确定FFT窗口位置，并计算延迟扩展。 在另一个实施例中，确定FE窗口位置的步骤包括设置FFT窗口的初始位置，计算每个抽头的能量，对每个抽头的所述能量进行平均的时间，将每个抽头的平均能量与乘以 所有抽头的平均能量，将每个抽头的平均能量与第二阈值乘以别名分量中的最大平均能量，如果抽头的平均能量大于所述第二阈值乘以最大值，则更新该组路径 别名成分中的平均能量; 并精简FFT窗口位置。

公开(公告)号：US20070091841A1

公开(公告)日：2007-04-26

申请号：US11559263

申请日：2006-11-13

申请人： Naga Bhushan ,  Etienne Chaponniere ,  Peter Black ,  David Tse

发明人： Naga Bhushan ,  Etienne Chaponniere ,  Peter Black ,  David Tse

IPC分类号： H04Q7/00

CPC分类号： H04W72/1231

摘要： A transmitter directed, distributed receiver using multi-user diversity provided by the distribution of the receiver. Advantage is taken of the uncorrelated variations over time in the condition of communication links between a common transmitter and several users. The greater the variation in the quality of a particular link over time, the greater the increase in total system throughput provided. A scheduler metric (or scheduler metric) represents the instantaneous quality of the communication link between each user and the transmitter with respect to the average quality of the link. Alternatively, the scheduler metric represents the instantaneous channel condition with respect to the average data throughput over that channel. The common transmitting station uses the scheduler metric to directly compare the desirability of granting each channel access with the desirability of granting each other channel access. The users with links that have the greatest scheduler metric are provided access to the channels.

摘要翻译： 一种使用由接收机分配提供的多用户分集的发射机定向分布式接收机。 在普通发射机和多个用户之间的通信链路的情况下，优先考虑不相关的随时间变化的变化。 随着时间的推移，特定链路的质量变化越大，提供的系统总吞吐量的增加越多。 调度器度量（或调度器度量）表示相对于链路的平均质量的每个用户和发射机之间的通信链路的瞬时质量。 或者，调度器度量表示相对于该信道上的平均数据吞吐量的瞬时信道条件。 公共发送站使用调度器度量来直接比较授予每个信道接入的可取性与允许彼此信道接入的可取性。 拥有最大调度器度量标准的链接的用户可以访问这些通道。

公开(公告)号：US20060062322A1

公开(公告)日：2006-03-23

申请号：US11047347

申请日：2005-01-28

申请人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

发明人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

IPC分类号： H04B15/00 ,  H04K1/10 ,  H04L27/28

CPC分类号： H04L1/20 ,  H04B1/1027 ,  H04L27/2647

摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.

摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。

公开(公告)号：US20070042780A1

公开(公告)日：2007-02-22

申请号：US11506068

申请日：2006-08-16

申请人： Rashid Attar ,  Naga Bhushan ,  Peter Black ,  Rajesh Pankaj ,  Danlu Zhang ,  Qiang Wu ,  Mehmet Yavuz

发明人： Rashid Attar ,  Naga Bhushan ,  Peter Black ,  Rajesh Pankaj ,  Danlu Zhang ,  Qiang Wu ,  Mehmet Yavuz

IPC分类号： H04Q7/20

CPC分类号： H04W36/18 ,  H04W36/30 ,  H04W36/38 ,  H04W72/00 ,  H04W99/00

摘要： Embodiments disclosed herein relate to methods and systems for providing adaptive server selection in wireless communications. An access terminal may be configured to determine a forward link quality metric associated with each of a plurality of sectors serviced by a plurality of access points; assign credits to each sector in relation to the forward link quality metric; and change a data source control (DSC) value if the credits accumulated for a non-serving sector at a DSC change boundary is greater than a predetermined threshold, where the non-serving sector and the serving sector for the access terminal belong to different cells. The access terminal may be further configured to change a data rate control (DRC) cover in accordance with the DSC change. The use of DSC may provide an early indication of handoff, thereby allowing the service outage associated with server switching to be substantially reduced.

摘要翻译： 本文公开的实施例涉及用于在无线通信中提供自适应服务器选择的方法和系统。 接入终端可以被配置为确定与由多个接入点服务的多个扇区中的每一个相关联的前向链路质量度量; 根据前向链路质量度量为每个扇区分配信用; 并且如果在DSC变化边界处为非服务扇区累积的积分大于预定阈值，则其中非服务扇区和接入终端的服务扇区属于不同小区，则改变数据源控制（DSC）值 。 接入终端还可以被配置为根据DSC变化改变数据速率控制（DRC）覆盖。 使用DSC可以提供切换的早期指示，从而允许大大减少与服务器切换相关联的服务中断。

公开(公告)号：US20060146721A1

公开(公告)日：2006-07-06

申请号：US11364384

申请日：2006-02-27

申请人： Rashid Attar ,  Peter Black ,  Mehmet Gurelli ,  Mehmet Yavuz ,  Naga Bhushan

发明人： Rashid Attar ,  Peter Black ,  Mehmet Gurelli ,  Mehmet Yavuz ,  Naga Bhushan

IPC分类号： H04J3/14 ,  H04L12/56

CPC分类号： H04L1/0017 ,  H04L1/0002 ,  H04L1/0021 ,  H04L1/20 ,  H04L47/50 ,  H04W28/18 ,  H04W72/1236 ,  H04W72/1242

摘要： Embodiments disclosed here relate to scheduling packet transmission in a multi-carrier communication system. In an embodiment, a master scheduler having at least one processor and at least one memory operably connected to the at least one processor is adapted to execute instructions stored in the at least one memory, the instructions comprising selecting a packet with a highest packet metric from among candidate packets from one carrier of a plurality of carriers, whereby expedited forwarding flows do not have a higher metric on another carrier.

摘要翻译： 这里公开的实施例涉及在多载波通信系统中调度分组传输。 在一个实施例中，具有至少一个处理器的主调度器和可操作地连接到至少一个处理器的至少一个存储器适于执行存储在至少一个存储器中的指令，所述指令包括选择具有最高分组度量的分组 在来自多个载波的一个载波的候选分组中，加速转发流在另一个载波上不具有较高的度量。

公开(公告)号：US20050276364A1

公开(公告)日：2005-12-15

申请号：US11102301

申请日：2005-04-08

申请人： Peter Black ,  Hao Xu ,  June Namgoong ,  Srikant Jayaraman

发明人： Peter Black ,  Hao Xu ,  June Namgoong ,  Srikant Jayaraman

IPC分类号： H04L25/02 ,  H04L7/00

CPC分类号： H04L25/0204 ,  H04L25/0216 ,  H04L25/0234

摘要： A pilot assisted channel estimation process. A receiver may be configured to estimate the impulse response of a channel from a signal having pilot tones and spread-spectrum pilot signals. The receiver estimates the response of the channel from the pilot tones, and adapts the length of delay the channel response is estimated based on the spread-spectrum pilot signals.

摘要翻译： 导频辅助信道估计过程。 接收机可以被配置为从具有导频音调和扩频导频信号的信号估计信道的脉冲响应。 接收机从导频音估计信道的响应，并根据扩频导频信号调整估计信道响应的延迟长度。

公开(公告)号：US20060245347A1

公开(公告)日：2006-11-02

申请号：US11119240

申请日：2005-04-29

申请人： Srikant Jayaraman ,  Hao Xu ,  June Namgoong ,  Michael Mangan ,  Peter Black

发明人： Srikant Jayaraman ,  Hao Xu ,  June Namgoong ,  Michael Mangan ,  Peter Black

IPC分类号： H04J11/00

CPC分类号： H04L27/2662 ,  H04L1/20 ,  H04L5/0048 ,  H04L27/2695 ,  H04L2001/0093

摘要： A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.

公开(公告)号：US20060203779A1

公开(公告)日：2006-09-14

申请号：US11190107

申请日：2005-07-25

申请人： Rashid Attar ,  Peter Black ,  Naga Bhushan

发明人： Rashid Attar ,  Peter Black ,  Naga Bhushan

IPC分类号： H04B7/216

CPC分类号： H04W28/18

摘要： A method and system for de-coupling forward and reverse link assignment for multi-carrier wireless communication systems. A method may assign two or more forward link code division multiple access (CDMA) carriers to transmit data from a base station to an access terminal; assign one or more reverse link CDMA carriers to transmit data from the access terminal to the base station; and limit reverse link overhead transmissions corresponding to the two or more forward link CDMA carriers.

摘要翻译： 一种用于解耦多载波无线通信系统的前向和反向链路分配的方法和系统。 方法可以分配两个或更多个前向链路码分多址（CDMA）载波，以将数据从基站发送到接入终端; 分配一个或多个反向链路CDMA载波以将数据从接入终端发送到基站; 并且限制对应于两个或更多个前向链路CDMA载波的反向链路开销传输。

公开(公告)号：US20060164990A1

公开(公告)日：2006-07-27

申请号：US11045199

申请日：2005-01-27

申请人： Naga Bhushan ,  Peter Black

发明人： Naga Bhushan ,  Peter Black

IPC分类号： H04J1/16 ,  H04Q7/00

CPC分类号： H04L1/0007 ,  H04L1/0002 ,  H04L1/0017 ,  H04L45/123 ,  H04L2001/0093 ,  H04W28/06 ,  H04W28/18 ,  H04W72/04 ,  H04W72/12 ,  H04W88/08

摘要： Systems and methods for optimizing the allocation of resources to serve different types of data flows in a wireless communication system are disclosed. An exemplary method involves calculating data metrics for data in a plurality of queues. Each queue corresponds to a different data flow in the wireless communication system. The data metrics are used to determine a separate transmission metric for each of a plurality of possible transmission formats. The transmission metric for a given transmission format is dependent on the data metrics corresponding to allocated data for the given transmission format. A transmission format is selected that has an optimum transmission metric. The allocated data for the selected transmission format is transmitted on the forward link in accordance with the selected transmission format.

摘要翻译： 公开了一种在无线通信系统中优化用于服务不同类型的数据流的资源分配的系统和方法。 示例性方法包括计算多个队列中的数据的数据度量。 每个队列对应于无线通信系统中的不同数据流。 数据度量被用于为多个可能的传输格式中的每一个确定单独的传输度量。 给定传输格式的传输度量取决于与给定传输格式的分配数据相对应的数据量度。 选择具有最佳传输度量的传输格式。 所选择的传输格式的分配数据根据选择的传输格式在前向链路上传输。