公开(公告)号：US20110026647A1

公开(公告)日：2011-02-03

申请号：US12510537

申请日：2009-07-28

申请人： Kambiz Zangi ,  Rajaram Ramesh

发明人： Kambiz Zangi ,  Rajaram Ramesh

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/03229 ,  H04L2025/03388

摘要： Teachings presented herein offer reduced computational complexity for symbol sequence estimation, and also provide for the generation of soft bit values representing the reliability of that estimation. A demodulator is configured to generate these soft bit values by identifying a candidate value for each symbol in the sequence which is more likely than at least one other in a defined set of candidate values. Based on the candidate value identified for each symbol, the demodulator forms a reduced set of candidate values for the symbol by selecting as many additional candidate values from the defined set as are needed to have complementary bit values for each bit value in that identified candidate value. The demodulator calculates soft bit values for the symbol sequence based on a sequence estimation process whose state space for each symbol is constrained to the corresponding reduced set.

摘要翻译： 本文提供的教学提供了减少符号序列估计的计算复杂度，并且还提供了代表该估计的可靠性的软比特值的产生。 解调器被配置为通过在所定义的一组候选值中识别比所述序列中的至少另一个更可能的序列中的每个符号的候选值来生成这些软比特值。 基于为每个符号识别的候选值，解调器通过从所定义的集合中选择与所识别的候选值中的每个比特值具有互补比特值所需的附加候选值来形成用于该符号的候选值的缩减集合 。 解调器基于序列估计处理来计算符号序列的软比特值，其中每个符号的状态空间被约束到相应的缩减集。

公开(公告)号：US20070167181A1

公开(公告)日：2007-07-19

申请号：US11380476

申请日：2006-04-27

申请人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

IPC分类号： H04B7/00

CPC分类号： H04W48/12 ,  H04W4/06 ,  H04W48/10 ,  H04W56/00

摘要： A mobile station for operating in a broadcast-centric cellular communication system. The system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. System-specific control information common to all cells is synchronously and simultaneously broadcast from multiple base stations using a broadcast channel that is identical across the entire system. Cell-specific control information is transmitted individually from each base station. The mobile station uses the broadcast information for initial synchronization to the system, and to obtain most relevant system information. After system synchronization, the mobile station identifies the connected cell through a physical layer characteristic, and performs initial access to the system.

摘要翻译： 一种用于在以广播为中心的蜂窝通信系统中操作的移动台。 该系统通过利用具有在多个相关联的小区内发送信号的多个基站的蜂窝通信系统中的宏分集的优点来改善广播信道性能。 使用在整个系统中相同的广播信道，从多个基站同步并同时广播所有小区公用的系统特定的控制信息。 每个基站单独发送小区特定的控制信息。 移动台使用广播信息进行系统的初始同步，并获得最相关的系统信息。 在系统同步之后，移动台通过物理层特性识别连接的小区，并对系统进行初始访问。

公开(公告)号：US08223896B2

公开(公告)日：2012-07-17

申请号：US12510537

申请日：2009-07-28

申请人： Kambiz Zangi ,  Rajaram Ramesh

发明人： Kambiz Zangi ,  Rajaram Ramesh

IPC分类号： H04L27/06

CPC分类号： H04L25/03318 ,  H04L25/03229 ,  H04L2025/03388

摘要： Teachings presented herein offer reduced computational complexity for symbol sequence estimation, and also provide for the generation of soft bit values representing the reliability of that estimation. A demodulator is configured to generate these soft bit values by identifying a candidate value for each symbol in the sequence which is more likely than at least one other in a defined set of candidate values. Based on the candidate value identified for each symbol, the demodulator forms a reduced set of candidate values for the symbol by selecting as many additional candidate values from the defined set as are needed to have complementary bit values for each bit value in that identified candidate value. The demodulator calculates soft bit values for the symbol sequence based on a sequence estimation process whose state space for each symbol is constrained to the corresponding reduced set.

摘要翻译： 本文提供的教学提供了减少符号序列估计的计算复杂度，并且还提供了代表该估计的可靠性的软比特值的产生。 解调器被配置为通过在所定义的一组候选值中识别比所述序列中的至少另一个更可能的序列中的每个符号的候选值来生成这些软比特值。 基于为每个符号识别的候选值，解调器通过从所定义的集合中选择与所识别的候选值中的每个比特值具有互补比特值所需的附加候选值来形成用于该符号的候选值的缩减集合 。 解调器基于序列估计处理来计算符号序列的软比特值，其中每个符号的状态空间被约束到相应的缩减集。

公开(公告)号：US07751838B2

公开(公告)日：2010-07-06

申请号：US11380476

申请日：2006-04-27

申请人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

IPC分类号： H04W56/00 ,  H04B7/02

CPC分类号： H04W48/12 ,  H04W4/06 ,  H04W48/10 ,  H04W56/00

摘要： A mobile station for operating in a broadcast-centric cellular communication system. The system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. System-specific control information common to all cells is synchronously and simultaneously broadcast from multiple base stations using a broadcast channel that is identical across the entire system. Cell-specific control information is transmitted individually from each base station. The mobile station uses the broadcast information for initial synchronization to the system, and to obtain most relevant system information. After system synchronization, the mobile station identifies the connected cell through a physical layer characteristic, and performs initial access to the system.

摘要翻译： 一种用于在以广播为中心的蜂窝通信系统中操作的移动台。 该系统通过利用具有在多个相关联的小区内发送信号的多个基站的蜂窝通信系统中的宏分集的优点来改善广播信道性能。 使用在整个系统中相同的广播信道，从多个基站同步并同时广播所有小区公用的系统特定的控制信息。 每个基站单独发送小区特定的控制信息。 移动台使用广播信息进行系统的初始同步，并获得最相关的系统信息。 在系统同步之后，移动台通过物理层特性识别连接的小区，并对系统进行初始访问。

公开(公告)号：US20070167159A1

公开(公告)日：2007-07-19

申请号：US11380478

申请日：2006-04-27

申请人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

IPC分类号： H04Q7/20

CPC分类号： H04W68/10 ,  H04B7/022

摘要： A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. The system constructs an identical paging signal at the plurality of base stations, and controls the base stations to simultaneously transmit the identical paging signal. A mobile station camps on a paging channel that is common to the plurality of base stations, and listens to paging messages being simultaneously broadcast by the plurality of base stations. The mobile station selects a base station having a suitable signal quality, and transmits to the selected base station, a response to a paging message addressed to the mobile station.

摘要翻译： 以广播为中心的蜂窝通信系统通过利用具有在多个关联小区内发送信号的多个基站的蜂窝通信系统中的宏分集的益处来改善广播信道性能。 该系统在多个基站处构造相同的寻呼信号，并且控制基站同时发送相同的寻呼信号。 移动台驻留在多个基站共用的寻呼信道上，并且收听由多个基站同时广播的寻呼消息。 移动站选择具有适当信号质量的基站，并向所选择的基站发送对寻址到移动台的寻呼消息的响应。

公开(公告)号：US07672667B2

公开(公告)日：2010-03-02

申请号：US11380474

申请日：2006-04-27

申请人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

IPC分类号： H04W4/00

CPC分类号： H04W48/12 ,  H04W4/06 ,  H04W48/10 ,  H04W56/00

摘要： A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. System-specific control information common to all cells is synchronously and simultaneously broadcast from multiple base stations using a broadcast channel that is identical across the entire system. Cell-specific control information is transmitted individually from each base station. Mobile stations use the broadcast information for initial synchronization to the system, and to obtain most relevant system information. After system synchronization, the mobile stations identify the connected cell through a physical layer characteristic, and perform initial access to the system.

摘要翻译： 以广播为中心的蜂窝通信系统通过利用具有在多个关联小区内发送信号的多个基站的蜂窝通信系统中的宏分集的优点来改善广播信道性能。 使用在整个系统中相同的广播信道，从多个基站同步并同时广播所有小区公用的系统特定的控制信息。 每个基站单独发送小区特定的控制信息。 移动台使用广播信息进行系统的初始同步，并获得最相关的系统信息。 在系统同步之后，移动台通过物理层特征识别连接的小区，并对系统进行初始访问。

公开(公告)号：US20070167180A1

公开(公告)日：2007-07-19

申请号：US11380474

申请日：2006-04-27

申请人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Kambiz Zangi ,  Kumar Balachandran

IPC分类号： H04B7/00

CPC分类号： H04W48/12 ,  H04W4/06 ,  H04W48/10 ,  H04W56/00

摘要： A broadcast-centric cellular communication system improves broadcast channel performance by exploiting the benefits of macro-diversity in a cellular communication system having a plurality of base stations that transmit signals within a plurality of associated cells. System-specific control information common to all cells is synchronously and simultaneously broadcast from multiple base stations using a broadcast channel that is identical across the entire system. Cell-specific control information is transmitted individually from each base station. Mobile stations use the broadcast information for initial synchronization to the system, and to obtain most relevant system information. After system synchronization, the mobile stations identify the connected cell through a physical layer characteristic, and perform initial access to the system.

摘要翻译： 以广播为中心的蜂窝通信系统通过利用具有在多个关联小区内发送信号的多个基站的蜂窝通信系统中的宏分集的益处来改善广播信道性能。 使用在整个系统中相同的广播信道，从多个基站同步并同时广播所有小区公用的系统特定的控制信息。 每个基站单独发送小区特定的控制信息。 移动台使用广播信息进行系统的初始同步，并获得最相关的系统信息。 在系统同步之后，移动台通过物理层特征识别连接的小区，并对系统进行初始访问。

公开(公告)号：US08897834B2

公开(公告)日：2014-11-25

申请号：US13292738

申请日：2011-11-09

申请人： Karl J. Molnar ,  Kambiz Zangi ,  Leonid Krasny ,  Stephen Grant ,  Jonas B. Karlsson

发明人： Karl J. Molnar ,  Kambiz Zangi ,  Leonid Krasny ,  Stephen Grant ,  Jonas B. Karlsson

IPC分类号： H04M1/00 ,  H04B7/00 ,  H04W4/00 ,  H04B7/02 ,  H04B7/10 ,  H04B7/06 ,  H04W88/02

CPC分类号： H04B7/0619 ,  H04B7/024 ,  H04B7/061 ,  H04B7/0639 ,  H04B7/0691 ,  H04B7/10 ,  H04W72/12 ,  H04W72/1278 ,  H04W88/02

摘要： A communication device is described herein that has control (or at least partial control) over which virtual antenna(s) in one or more base stations to use for transmissions. In one embodiment, the mobile phone performs the following steps: (1) receives an antenna subset list (from the scheduling unit) which identifies a configuration of virtual antennas that is associated with the base station(s); (2) uses the antenna subset list to select which virtual antenna(s) in the configuration of virtual antennas to use for transmissions; and (3) sends an antenna selection signal (to the scheduling unit) which contains information that instructs/requests the base station(s)/scheduling unit to use the selected virtual antenna(s) for transmissions.

摘要翻译： 本文描述的通信设备具有控制（或至少部分控制），一个或多个基站中的虚拟天线将用于传输。 在一个实施例中，移动电话执行以下步骤：（1）从识别与基站相关联的虚拟天线的配置接收来自调度单元的天线子集列表; （2）使用天线子集列表来选择用于传输的虚拟天线的配置中的哪些虚拟天线; 并且（3）发送包含指示/请求基站/调度单元使用所选择的虚拟天线进行传输的信息的天线选择信号（到调度单元）。

公开(公告)号：US08406326B2

公开(公告)日：2013-03-26

申请号：US12779106

申请日：2010-05-13

申请人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

发明人： Jung-Fu Cheng ,  Dennis Hui ,  Kambiz Zangi ,  Leonid Krasny

IPC分类号： H04K1/10

CPC分类号： H04W72/0413 ,  H04L1/0019 ,  H04L1/0028 ,  H04L1/20 ,  H04W72/042

摘要： The required bitrate for reporting channel state information from a network transceiver to the network is dramatically reduced, while maintaining fidelity of channel estimates, by exploiting prior channel estimates and the time correlation of channel response. For a selected set of sub-carriers, the transceiver estimates channel frequency response from pilot signals. The transceiver also predicts the frequency response for each selected sub-carrier, by multiplying a state vector comprising prior frequency response estimate and a coefficient vector comprising linear predictive coefficients. The predicted frequency response is subtracted from the estimated frequency response, and the prediction error is quantized and transmitted to the network. The network maintains a corresponding state vector and predictive coefficient vector, and also predicts a frequency response for each selected sub-carrier. The received prediction error is inverse quantized and subtracted from the predicted frequency response to yield a frequency response corresponding to that estimated at the transceiver.

摘要翻译： 通过利用先前的信道估计和信道响应的时间相关性，可以显着降低从网络收发器向网络报告信道状态信息所需的比特率，同时保持信道估计的保真度。 对于所选择的一组子载波，收发器估计来自导频信号的信道频率响应。 收发器还通过将包括先前频率响应估计的状态向量和包括线性预测系数的系数向量相乘来预测每个所选子载波的频率响应。 从估计的频率响应中减去预测的频率响应，并将预测误差量化并发送到网络。 网络维持相应的状态向量和预测系数向量，并且还预测每个选择的子载波的频率响应。 接收的预测误差被反量化，并从预测的频率响应中减去，以产生与在收发机处估计的频率响应相对应的频率响应。

公开(公告)号：US08320359B2

公开(公告)日：2012-11-27

申请号：US11531219

申请日：2006-09-12

申请人： Bengt Lindoff ,  Robert Baldemair ,  Kambiz Zangi ,  Stefan Parkvall

发明人： Bengt Lindoff ,  Robert Baldemair ,  Kambiz Zangi ,  Stefan Parkvall

IPC分类号： H04J3/06

CPC分类号： H04L27/2685 ,  H04B2201/70702 ,  H04J11/0069 ,  H04L5/0007 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0064 ,  H04L27/2613 ,  H04L27/2655

摘要： An apparatus and method operable to enable the use of synchronization (SCH) and broadcast channel (BCH) signals with a bandwidth (BW) equal to the minimum possible BW for the system, for example 1.25 MHz. The present invention increases the speed of the initial cell search. In addition, the repetition of signals in the frequency domain makes it possible to perform a faster cell detection in the event a system/mobile terminal/UE is using a larger BW. When the present invention is used in a high BW system, a mobile terminal/UE is operable to determine whether to perform a cell search on a low or high BW to get sufficient cell detection performance.

摘要翻译： 一种用于使能同步（SCH）和广播信道（BCH）信号的装置和方法，所述同步（SCH）和广播信道（BCH）信号的带宽（BW）等于系统的最小可能BW，例如1.25MHz。 本发明增加了初始小区搜索的速度。 此外，频域中的信号的重复使得可以在系统/移动终端/ UE正在使用较大的BW的情况下执行更快的小区检测。 当本发明用于高BW系统时，移动终端/ UE可操作以确定是否在低或高BW上执行小区搜索以获得足够的小区检测性能。