公开(公告)号：US09780931B2

公开(公告)日：2017-10-03

申请号：US13494040

申请日：2012-06-12

申请人： Havish Koorapaty ,  Robert Baldemair ,  Jung-Fu Cheng ,  Mattias Frenne ,  Daniel Larsson

发明人： Havish Koorapaty ,  Robert Baldemair ,  Jung-Fu Cheng ,  Mattias Frenne ,  Daniel Larsson

IPC分类号： H04L27/00 ,  H04L5/00 ,  H04L27/26 ,  H04L25/02

CPC分类号： H04L5/0048 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0053 ,  H04L25/0204 ,  H04L25/0228 ,  H04L27/2611

摘要： Devices and methods for transmitting information in resource blocks between a base station and one or more communication devices are disclosed. In each resource block (RB) used for a data or control channel transmission, a plurality of non-overlapping regions of resource elements (REs) are defined. Each region is associated with one or multiple unique reference symbols (RSs). When user equipment (UE) demodulates the information it receives in a particular region of a resource block (RB), it uses the reference symbol (RS) associated with that region. The reference symbol (RS) information may be used, for example, to estimate a channel of the communication network or to demodulate and decode the data contained within the associated regions.

公开(公告)号：US09735939B2

公开(公告)日：2017-08-15

申请号：US13580654

申请日：2012-04-26

申请人： Havish Koorapaty ,  Jung-Fu Cheng ,  Mattias Frenne ,  Johan Furuskog ,  Daniel Larsson ,  Stefan Parkvall

发明人： Havish Koorapaty ,  Jung-Fu Cheng ,  Mattias Frenne ,  Johan Furuskog ,  Daniel Larsson ,  Stefan Parkvall

IPC分类号： H04W72/04 ,  H04L5/00 ,  H04W72/12

CPC分类号： H04L5/0053 ,  H04L5/0007 ,  H04W72/121 ,  H04W72/1289

摘要： A method in a network node for transmitting control information to a user equipment in a telecommunications system is provided. The control information is scheduled in time intervals of a downlink shared data channel, wherein the control information is allocated resource elements in resource blocks of a time-frequency Orthogonal Frequency Division Multiplexing, OFDM, grid in the time intervals in which the control information is scheduled. The network node determines for a time interval, a set of user equipments for which control information is scheduled in the time interval. Also, it selects for a user equipment comprised in the determined set of user equipments, at least one group of user equipments amongst one or more groups of user equipments to which the user equipment is assigned. It also prepares a group signal corresponding to the selected one group of user equipments by allocating resource elements in the resource blocks of the time interval to the group signal. Furthermore, the network node transmits the prepared group signal in the allocated resource element in the time interval to the user equipment such that the user equipment is enabled to determine whether the control information that is allocated resource elements in the time interval is intended for the user equipment or not.A network node, a method in user equipment and a user equipment are also provided.

公开(公告)号：US20140301283A1

公开(公告)日：2014-10-09

申请号：US13885723

申请日：2013-03-19

申请人： Mattias Frenne ,  Jung-Fu Cheng ,  Johan Furuskog ,  Havish Koorapaty ,  Daniel Larsson

发明人： Mattias Frenne ,  Jung-Fu Cheng ,  Johan Furuskog ,  Havish Koorapaty ,  Daniel Larsson

IPC分类号： H04W72/04

CPC分类号： H04W72/042 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0686 ,  H04B7/0691 ,  H04L1/0068 ,  H04L1/0069 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0051 ,  H04L5/0053 ,  H04L27/2627 ,  H04W72/0406 ,  H04W72/044 ,  H04W72/0453 ,  H04W88/02

摘要： Time-frequency resources in a single PRB pair are used for both frequency-localized transmissions as well as distributed transmissions. A first control message is transmitted (2710) to a first user equipment (UE) using a first PRB pair, using first subsets of resource elements that are aggregated in a frequency-localized manner and that are transmitted using a single antenna port. A second control message to a second UE is simultaneously transmitted (2710), also using the first PRB pair, using second subsets of resources that are aggregated in a frequency-distributed manner across the first PRB pair and one or more additional PRB pairs and that are transmitted using at least two antenna ports, including the single antenna port used to transmit the symbols in the first non-overlapping subsets of resource elements.

摘要翻译： 单个PRB对中的时频资源用于频率本地化传输以及分布式传输。 使用第一PRB对，使用以频率定位的方式聚合并且使用单个天线端口发送的资源元素的第一子集来向第一用户设备（UE）发送第一控制消息（2710）。 使用第二个资源子集同时发送到第二个UE的第二个控制消息（2710），第二个资源子集以频率分布的方式跨越第一个PRB对和一个或多个附加的PRB对进行聚合， 使用至少两个天线端口发送，包括用于在资源元素的第一非重叠子集中发送符号的单个天线端口。

公开(公告)号：US08654687B2

公开(公告)日：2014-02-18

申请号：US13109524

申请日：2011-05-17

申请人： Havish Koorapaty ,  Jung-Fu Cheng

发明人： Havish Koorapaty ,  Jung-Fu Cheng

IPC分类号： H04L5/14

CPC分类号： H04L1/0002 ,  H04B7/2643 ,  H04W84/045 ,  H04W92/20

摘要： A system and method to use existing Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX) based signaling to effectuate dual-channel Time Division Duplex (TDD) communication between two transceivers giving preference to one type of subframes (either downlink or uplink) for data transmission. In backhaul communications between pico (or femto) and macro base stations, using LTE and WiMAX's TDD mode in such a manner effectively reduces unnecessary transmissions of pilot and synchronization sequence in downlink signaling, thereby reducing the level of pilot overhead and minimizing interference when data is not being transmitted. Similarly, the use of existing LTE (or WiMAX) implementations of TDD radio frames in this manner may achieve radio silence for some duration (e.g., when no uplink sub-frames are transmitted) when operating in a license-exempt spectrum, thereby allowing other license-exempt devices to potentially share the radio channel during the silence period.

摘要翻译： 使用现有长期演进（LTE）和全球微波接入互操作性（WiMAX）的信令的系统和方法来实现两个收发器之间的双信道时分双工（TDD）通信，其优先于一种类型的子帧（下行链路或 上行链路）进行数据传输。 在微微（或毫微微）和宏基站之间的回程通信中，以这种方式使用LTE和WiMAX的TDD模式有效地减少了下行链路信令中的导频和同步序列的不必要的传输，从而降低了导频开销的水平，并且当数据为 不被传送 类似地，以这种方式使用TDD无线电帧的现有LTE（或WiMAX）实施方式可以在一些持续时间内实现无线电静音（例如，当没有发送上行链路子帧时）在免许可频谱中操作，从而允许其他 许可证免除设备在沉默期间可能共享无线电频道。

公开(公告)号：US08111787B2

公开(公告)日：2012-02-07

申请号：US12265220

申请日：2008-11-05

申请人： Havish Koorapaty ,  Jiann-Ching Guey

发明人： Havish Koorapaty ,  Jiann-Ching Guey

IPC分类号： H04L27/06

CPC分类号： H04L5/0048 ,  H04L25/0226 ,  H04L25/0232

摘要： Smaller patterns of regularly-spaced pilot symbols are discerned from a larger pattern of irregularly-spaced pilot symbols transmitted in the time-frequency domain. Accordingly, the irregularly-spaced pilot symbols can be partitioned into at least two different groups of regularly-spaced pilot symbols in the time-frequency domain. Each group of regularly-spaced pilot symbols is individually processed with lower complexity and the results combined to generate an accurate time-frequency channel response estimate. According to an embodiment, a set of irregularly-spaced pilot symbols is transmitted over a time-frequency window. Channel response is estimated based on the pilot symbols by grouping the pilot symbols into subsets of regularly-spaced pilot symbols. An intermediate quantity is generated for each subset of regularly-spaced pilot symbols as a function of the pilot symbols included in the subset. The channel response is estimated over the time-frequency window as a function of the intermediate quantities.

摘要翻译： 从时频域中发送的不规则间隔的导频符号的较大模式可以看出较小的规则间隔导频符号模式。 因此，不规则间隔的导频符号可以被划分成时频域中的至少两个不同的规则间隔的导频符号组。 每组规则间隔的导频符号以较低的复杂度进行单独处理，并且结果组合以产生准确的时频信道响应估计。 根据实施例，在时间 - 频率窗口上发送一组不规则间隔的导频符号。 通过将导频符号分组成规则间隔的导频符号的子集，基于导频符号来估计信道响应。 根据包括在该子集中的导频符号的函数，为规则间隔的导频符号的每个子集生成中间量。 在时间 - 频率窗口上估计信道响应作为中间量的函数。

公开(公告)号：US07899015B2

公开(公告)日：2011-03-01

申请号：US11681302

申请日：2007-03-02

申请人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

发明人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04W72/0406 ,  H04B2201/709727 ,  H04W4/18 ,  H04W48/08 ,  H04W72/082

摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.

摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。

公开(公告)号：US20080212539A1

公开(公告)日：2008-09-04

申请号：US11681302

申请日：2007-03-02

申请人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

发明人： Gregory E. Bottomley ,  Jung-fu Cheng ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04B7/216

CPC分类号： H04W72/0406 ,  H04B2201/709727 ,  H04W4/18 ,  H04W48/08 ,  H04W72/082

摘要： Method and apparatuses taught herein enable link adaptation feedback to be determined in advance for future transmit intervals, based on one or more data sending units sending indications of future transmit resource allocations, and receiving corresponding link adaptation feedback from data receiving units. Knowledge of the future transmit resource allocations enable individual data sending units to predict interference conditions for the future transmit interval, and thereby compute link adaptation feedback that takes advantage of low-interference conditions. Individual data sending units receive link adaptation feedback for the future transmit interval from the data receiving units they are supporting, and make corresponding link adaptations for the future transmit interval. Such operations are, in one or more embodiments, carried out in a Wideband Code Division Multiple Access (WCDMA), Long Term Evolution LTE), or WiMAX network, wherein the data sending units comprise radio base stations, and the data receiving units comprise wireless communication devices.

摘要翻译： 基于一个或多个数据发送单元发送未来发送资源分配的指示，以及从数据接收单元接收相应的链路适配反馈，本文教导的方法和装置使能够针对未来的发射间隔预先确定链路自适应反馈。 对未来发送资源分配的了解使各个数据发送单元能够预测未来发射间隔的干扰条件，从而计算利用低干扰条件的链路自适应反馈。 单个数据发送单元从其所支持的数据接收单元接收将来发送间隔的链路自适应反馈，并对未来发送间隔进行相应的链路适配。 在一个或多个实施例中，这样的操作在宽带码分多址（WCDMA），长期演进LTE）或WiMAX网络中进行，其中数据发送单元包括无线电基站，并且数据接收单元包括无线 通讯设备。

公开(公告)号：US20080031370A1

公开(公告)日：2008-02-07

申请号：US11497658

申请日：2006-08-02

申请人： Jiann-Ching Guey ,  Havish Koorapaty

发明人： Jiann-Ching Guey ,  Havish Koorapaty

IPC分类号： H04K1/10

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L25/0226 ,  H04L25/0228 ,  H04L25/0242

摘要： According to methods and apparatus taught herein, an Orthogonal Frequency Division Multiplexed (OFDM) transmitter increases pilot density in the edge regions of an OFDM signal, such as by using additional pilot sub carriers in the edge regions. For example, the OFDM signal includes first pilot sub carriers uniformly distributed across the frequency band of the OFDM signal, and second pilot sub carriers distributed within the edge regions. A corresponding OFDM receiver circuit uses the increased pilot density to improve channel estimation. For example, the receiver circuit uses the first pilot sub carriers in a Maximum Likelihood (ML) estimation process to obtain first channel estimates, and uses the results of ML estimation along with the second pilot sub carriers in a Minimum Mean Square Error (MMSE) estimation process to obtain second channel estimates. The receiver forms the improved channel estimates using the first and second channel estimates.

摘要翻译： 根据本文教导的方法和装置，正交频分复用（OFDM）发射机例如通过在边缘区域中使用附加导频子载波来增加OFDM信号的边缘区域中的导频密度。 例如，OFDM信号包括均匀分布在OFDM信号的频带上的第一导频子载波，以及分布在边缘区域内的第二导频子载波。 相应的OFDM接收机电路使用增加的导频密度来改善信道估计。 例如，接收机电路使用最大似然（ML）估计处理中的第一导频子载波来获得第一信道估计，并且以最小均方误差（MMSE）中的第二导频子载波与ML估计结果一起使用， 估计过程获得第二渠道估计。 接收机使用第一和第二信道估计来形成改进的信道估计。

公开(公告)号：US06909758B2

公开(公告)日：2005-06-21

申请号：US09842928

申请日：2001-04-27

申请人： Rajaram Ramesh ,  Havish Koorapaty

发明人： Rajaram Ramesh ,  Havish Koorapaty

IPC分类号： H04L1/00 ,  H04L1/18 ,  H03D1/00

CPC分类号： H04L27/0008 ,  H04L1/0006 ,  H04L1/1816 ,  H04L1/1845 ,  H04L27/2017 ,  H04L27/2067

摘要： Systems and methods for decoding data blocks enable a receiving device to decode a retransmitted data block using previously stored bits. A receiver demodulates a data block transmitted via a first modulation scheme. When the receiver is not able to decode the data block correctly, the transmitter may retransmit the data block as a number of split blocks via a different modulation scheme. The receiver may then combine the bits generated by demodulating the original data block with bits generated by demodulating the retransmitted data block. The receiver then decodes the combined bits.

摘要翻译： 用于解码数据块的系统和方法使得接收设备能够使用先前存储的位来解码重传的数据块。 接收机解调通过第一调制方案发送的数据块。 当接收机不能正确解码数据块时，发射机可以通过不同的调制方案将数据块重发为多个分割块。 然后，接收机可以将通过解调原始数据块产生的比特与通过解调重传的数据块产生的比特组合。 然后，接收器对组合的比特进行解码。

公开(公告)号：US06873852B2

公开(公告)日：2005-03-29

申请号：US10044230

申请日：2002-01-10

申请人： Havish Koorapaty ,  Wade Wang ,  Viswanath Panakanti ,  Guwei Zhu

发明人： Havish Koorapaty ,  Wade Wang ,  Viswanath Panakanti ,  Guwei Zhu

IPC分类号： H04W64/00 ,  H04Q7/20

CPC分类号： H04W64/00

摘要： A system and method of estimating the position of a mobile terminal (MT) operating in a radio telecommunications network. Expected Received Signal Strength (RSS) values are predicted by a computer-aided prediction tool, and/or are measured by a test MT from base station transceivers. The predicted and measured RSS values are then tagged to indicate whether each value was predicted or measured. The RSS values are then stored at a plurality of locations in a database. When RSS measurements are received from the MT being located, a covariance matrix is used to compute metrics for the locations in the database. If more than a threshold percentage of the locations were populated with measured values, a Maximum-Likelihood (ML) estimator is used to estimate the position of the MT. If fewer than the threshold percentage of locations were populated with measured values, a Minimum-Mean-Square-Error (MMSE) estimator is used to estimate the position.

摘要翻译： 一种估计在无线电信网络中操作的移动终端（MT）的位置的系统和方法。 预期接收信号强度（RSS）值由计算机辅助预测工具预测，和/或通过来自基站收发器的测试MT测量。 然后将预测和测量的RSS值标记，以指示每个值是预测还是测量。 然后将RSS值存储在数据库中的多个位置。 当从位于的MT接收到RSS测量时，使用协方差矩阵来计算数据库中位置的度量。 如果超过阈值百分比的位置用测量值填充，则使用最大似然（ML）估计器来估计MT的位置。 如果使用测量值填充位置的阈值百分比，则使用最小均方误差（MMSE）估计器来估计位置。