公开(公告)号：CA2675254A1

公开(公告)日：2008-08-14

申请号：CA2675254

申请日：2008-02-06

Applicant: QUALCOMM INC

Inventor： KIM BYOUNG-HOON ,  MALLADI DURGA PRASAD ,  ZHANG XIAOXIA ,  YOO TAESANG

IPC: H04B7/06

Abstract: Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero del ay, small delay, and large delay) for cyclic delay diversity and a set of pr ecoding matrices may be supported. In one design, a Node B may select a dela y specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and de lay, determine the combination with the best performance, and send this comb ination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay div ersity based on the selected delay. Alternatively, the Node B may perform pr ocessing for cyclic delay diversity based on the selected delay and then pre coding with the precoding matrix.

公开(公告)号：AU2008213682A1

公开(公告)日：2008-08-14

申请号：AU2008213682

申请日：2008-02-06

Applicant: QUALCOMM INC

Inventor： YOO TAESANG ,  ZHANG XIAOXIA ,  KIM BYOUNG-HOON ,  MALLADI DURGA PRASAD

IPC: H04B7/06

Abstract: A method for wireless communication, comprising: selecting a delay from among a plurality of delays; sending the selected delay from a first entity to a second entity; and exchanging data with the second entity with cyclic delay diversity based on the selected delay.

公开(公告)号：CA2819717A1

公开(公告)日：2008-05-15

申请号：CA2819717

申请日：2007-11-06

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON ,  YOO TAESANG

IPC: H04W24/00 ,  H04W16/10 ,  H04W72/06

Abstract: Techniques for supporting MIMO transmission with layer permutation are described. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewords being less than the number of antennas. Each codeword may be mapped across the multiple antennas. Two codewords may be generated. For rank 3, the first codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In another aspect, a base CQI indicative of an average signal quality may be determined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed with different penalty factors for different ranks or number of codewords.

公开(公告)号：CA2667161A1

公开(公告)日：2008-05-15

申请号：CA2667161

申请日：2007-11-06

Applicant: QUALCOMM INC

Inventor： YOO TAESANG ,  MALLADI DURGA PRASAD ,  KIM BYOUNG-HOON

IPC: H04B7/06 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06

Abstract: Techniques for supporting MIMO transmission with layer permutation are de scribed. In one aspect, multiple codewords may be generated for transmission from multiple antennas (e.g., virtual antennas), with the number of codewor ds being less than the number of antennas. Each codeword may be mapped acros s the multiple antennas. Two codewords may be generated. For rank 3, the fir st codeword may be mapped to one layer (or one antenna on each subcarrier), and the second codeword may be mapped to two layers (or two antennas on each subcarrier). For rank 4, each codeword may be mapped to two layers. In anot her aspect, a base CQI indicative of an average signal quality may be determ ined. A delta CQI indicative of improvement over the average signal quality may also be determined. In yet another aspect, selection may be performed wi th different penalty factors for different ranks or number of codewords.

公开(公告)号：WO2012024588A3

公开(公告)日：2012-05-31

申请号：PCT/US2011048423

申请日：2011-08-19

Applicant: QUALCOMM INC ,  BHATTAD KAPIL ,  LUO TAO ,  YOO TAESANG ,  ZHANG XIAOXIA ,  LUO XILIANG ,  LIU KE ,  MALLADI DURGA PRASAD

Inventor： BHATTAD KAPIL ,  LUO TAO ,  YOO TAESANG ,  ZHANG XIAOXIA ,  LUO XILIANG ,  LIU KE ,  MALLADI DURGA PRASAD

IPC: H04W88/06

CPC classification number: H04J11/0083 ,  H04B1/70718 ,  H04L5/0007 ,  H04W28/04 ,  H04W48/16 ,  H04W88/02

Abstract: User equipment (UE) associated with synchronous networks operate in a synchronous mode while UEs associated with asynchronous networks operate in an asynchronous mode. When operating in a synchronous mode, a UE can significantly improve performance of synchronization signal detection, data decoding, and tracking loop management by using the interference cancellation (IC) techniques that are not available in an asynchronous mode of operation. Obtaining synchronization indicators and determining the synchronization status of the current network by UE is disclosed. The determination may be based on the synchronization indicator, whether detected through signal detection, signal measurements, signal analysis, or the like.

Abstract translation: 与同步网络相关联的用户设备（UE）以同步模式工作，而与异步网络相关联的UE以异步模式工作。 当在同步模式下工作时，UE可以通过使用在异步操作模式中不可用的干扰消除（IC）技术来显着提高同步信号检测，数据解码和跟踪环路管理的性能。 公开了获取同步指示符并确定UE当前网络的同步状态。 该确定可以基于通过信号检测，信号测量，信号分析等检测的同步指示器。

公开(公告)号：WO2011139759A3

公开(公告)日：2011-12-22

申请号：PCT/US2011034123

申请日：2011-04-27

Applicant: QUALCOMM INC ,  LUO TAO ,  BHATTAD KAPIL ,  ZHANG XIAOXIA ,  YOO TAESANG ,  LIU KE

Inventor： LUO TAO ,  BHATTAD KAPIL ,  ZHANG XIAOXIA ,  YOO TAESANG ,  LIU KE

IPC: H04B7/06 ,  H04B1/7107

CPC classification number: H04J11/0053 ,  H04B7/0473 ,  H04J11/0033

Abstract: In one aspect, a method to enhance coverage in a heterogeneous wireless network wireless communication is disclosed. The method includes generating a reference signal indicating a plurality of transmit antenna ports and generating modulation symbols. Modulation symbols are assigned to each of the plurality of transmit antenna ports, in accordance with a spatial diversity coding scheme for the plurality of transmit antenna ports. At least one of the modulation symbols assigned to at least one of the plurality of transmit antenna ports is muted prior to transmission in accordance with the spatial diversity coding scheme. The non-muted modulation symbols and the reference signal are transmitted on the other of the plurality of transmit antenna ports.

Abstract translation: 一方面，公开了一种增强异构无线网络无线通信中的覆盖的方法。 该方法包括产生指示多个发射天线端口并产生调制符号的参考信号。 根据用于多个发射天线端口的空间分集编码方案，将调制符号分配给多个发射天线端口中的每一个。 分配给多个发送天线端口中的至少一个的调制符号中的至少一个根据空间分集编码方案在发送之前被静音。 在多个发送天线端口中的另一个发送非静噪调制符号和参考信号。

公开(公告)号：WO2011005533A3

公开(公告)日：2011-04-21

申请号：PCT/US2010039522

申请日：2010-06-22

Applicant: QUALCOMM INC ,  LUO TAO ,  DOAN DUNG N ,  YOO TAESANG ,  ZHANG XIAOXIA ,  SEONG KIBEOM

Inventor： LUO TAO ,  DOAN DUNG N ,  YOO TAESANG ,  ZHANG XIAOXIA ,  SEONG KIBEOM

IPC: H04L25/03

CPC classification number: H04L25/03343 ,  H04B7/0413 ,  H04B7/0456 ,  H04L5/0048 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Systems and methodologies are described that facilitate precoding signals transmitted over downlink control channels to provide transmit diversity. A dedicated reference signal (DRS) related to a wireless device can additionally be precoded such that the wireless device can determine a precoder or related parameters based at least in part on performing a channel estimate for the precoded DRS signal. The wireless device can utilize the determined precoder or related parameters to decode precoded signals received over downlink control channel resources. Additionally or alternatively, an access point can signal a sequence of precoders to the wireless device. The access point can cycle through the sequence of precoders to precode signals for transmission over downlink control channel resources, and the wireless device can decode the signals based at least in part on similarly cycling through the precoders for received signals.

Abstract translation: 描述了有助于对通过下行链路控制信道传输的信号进行预编码以提供传输分集的系统和方法。 另外可以对与无线设备相关的专用参考信号（DRS）进行预编码，使得无线设备可以至少部分地基于对预编码的DRS信号执行信道估计来确定预编码器或相关参数。 无线设备可以利用所确定的预编码器或相关参数对通过下行链路控制信道资源接收到的预编码信号进行解码。 附加地或可选地，接入点可以向无线设备发送一系列预编码器。 接入点可循环通过预编码器序列以预编码信号以通过下行链路控制信道资源进行传输，并且无线设备可至少部分地基于针对接收信号的预编码器的类似循环来解码信号。

公开(公告)号：NZ729899A

公开(公告)日：2022-07-29

申请号：NZ72989915

申请日：2015-09-30

Applicant: QUALCOMM INC

Inventor： WEI YONGBIN ,  LUO TAO ,  MALLADI DURGA ,  DAMNJANOVIC ALEKSANDAR ,  DAMNJANOVIC JELENA ,  YOO TAESANG ,  MALLIK SIDDHARTHA ,  CHENDAMARAI KANNAN ARUMUGAM ,  VAJAPEYAM MADHAVAN

IPC: H04L5/00 ,  H04W72/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may employ a multiplexing configuration based on latency and efficiency considerations. The base station may transmit a resource grant, a signal indicating the length of a downlink (DL) transmission time interval (TTI), and a signal indicating the length of a subsequent uplink (UL) TTI to one or more user equipment (UEs). The base station may dynamically select a new multiplexing configuration by, for example, setting the length of an UL TTI to zero or assigning multiple UEs resources in the same DL TTI. Latency may also be reduced by employing block feedback, such as block hybrid automatic repeat request (HARQ) feedback. A UE may determine and transmit HARQ feedback for each transport block (TB) of a set of TBs, which may be based on a time duration of a downlink TTI.

公开(公告)号：MY190475A

公开(公告)日：2022-04-22

申请号：MYPI2017700913

申请日：2015-09-30

Applicant: QUALCOMM INC

Inventor： MALLADI DURGA PRASAD ,  LUO TAO ,  VAJAPEYAM MADHAVAN SRINIVASAN ,  DAMNJANOVIC JELENA ,  YOO TAESANG ,  MALLIK SIDDHARTHA ,  DAMNJANOVIC ALEKSANDAR ,  CHENDAMARAI KANNAN ARUMUGAM ,  WEI YONGBIN

IPC: H04L1/18 ,  H04L5/00 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described. A base station (105) may employ a multiplexing configuration based on latency and efficiency considerations. The base station (105) may transmit a resource grant, a signal indicating the length of a downlink (DL) transmission time interval (TTI), and a signal indicating the length of a subsequent uplink (UL) TTI to one or more user equipment (UEs) (115). The base station (105) may dynamically select a new multiplexing configuration by, for example, setting the length of an UL TTI to zero or assigning multiple UEs resources in the same DL TTI. Latency may also be reduced by employing block feedback, such as block hybrid automatic repeat request (HARQ) feedback. A UE (115) may determine and transmit HARQ feedback for each transport block (TB) of a set of TBs, which may be based on a time duration of a downlink TTI.

公开(公告)号：ES2898369T3

公开(公告)日：2022-03-07

申请号：ES18708820

申请日：2018-02-20

Applicant: QUALCOMM INC

Inventor： FAKOORIAN SEYED ALI AKBAR ,  ZHANG XIAOXIA ,  YOO TAESANG ,  MALLIK SIDDHARTHA ,  MONTOJO JUAN

IPC: H04B7/00 ,  H04L5/00

Abstract: Un método de comunicación inalámbrica, que comprende: programar (500), por una estación base, una pluralidad de equipos de usuario, UEs, para la transmisión de una o más señales de referencia de enlace ascendente dentro de una subtrama identificada; transmitir (501), por la estación base, un mensaje de configuración de la señal de referencia, en donde el mensaje de configuración de señal de referencia incluye un identificador de secuencia de transmisión que identifica una multiplexación para uno o más puertos de antena asignados para la transmisión de una o más señales de referencia de enlace ascendente por la pluralidad de UEs, y en donde la multiplexación es una o ambas de multiplexación por división de frecuencia, FDM, y multiplexación por división de tiempo, TDM, sobre la subtrama identificada; señalizar (502), por la estación base, un identificador de celda virtual, ID, a cada uno de la pluralidad de UEs que identifica un grupo de celda asociado asignado a cada uno de la pluralidad de UEs, en donde el grupo de celda asociado es servido por una combinación de la estación base y una o más estaciones base vecinas; y recibir (503), en la estación base, una pluralidad de señales de referencia de enlace ascendente en la subtrama identificada de uno o más de la pluralidad de UEs, en donde la pluralidad de señales de referencia de enlace ascendente se identifica de acuerdo con el ID de celda virtual y la programación.