公开(公告)号：WO2010021900A2

公开(公告)日：2010-02-25

申请号：PCT/US2009053680

申请日：2009-08-13

Applicant: QUALCOMM INC ,  VAN NEE DIDIER JOHANNES RICHAR ,  VAN ZELST ALBERT ,  AWATER GEERT ARNOUT

Inventor： VAN NEE DIDIER JOHANNES RICHARD ,  VAN ZELST ALBERT ,  AWATER GEERT ARNOUT

IPC: H04L5/00

CPC classification number: H04B7/0413 ,  C08F214/18 ,  H04B7/0452 ,  H04B7/0615 ,  H04B7/0671 ,  H04B7/068 ,  H04B7/0684 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051

Abstract: Systems and/or methods for communication that generate a plurality of spatial streams are disclosed. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training sequence is distributed across a first symbol in a first one of the spatial streams and a second symbol in a second one of the spatial streams.

Abstract translation: 公开了用于产生多个空间流的通信的系统和/或方法。 每个空间流包括多个符号。 训练序列的至少一部分分布在空间流中的第一个中的第一个符号和第二个空间流中的第二个符号。

公开(公告)号：WO2012167193A3

公开(公告)日：2013-01-24

申请号：PCT/US2012040600

申请日：2012-06-01

Applicant: QUALCOMM INC ,  WENTINK MAARTEN MENZO ,  VAN ZELST ALBERT

Inventor： WENTINK MAARTEN MENZO ,  VAN ZELST ALBERT

IPC: H04W28/26 ,  H04W74/00 ,  H04W76/02

CPC classification number: H04W24/02 ,  H04W28/26 ,  H04W76/02

Abstract: Systems, methods, and devices for performing clear channel assessment at a receiving device are described herein. In some aspects, the receiving device determines whether it is the intended receiver for a data transmission. Upon determining it is the intended receiver, the receiving device transmits a reservation signal. Devices in the vicinity of the receiving device are configured to listen for the reservation signal and refrain from transmitting interfering signals to the receiving device based on the reservation signal.

Abstract translation: 这里描述了用于在接收设备处执行清晰信道评估的系统，方法和设备。 在一些方面，接收设备确定是否是用于数据传输的预期接收机。 在确定它是预期的接收机时，接收设备发送预约信号。 接收设备附近的设备被配置为监听预留信号，并且基于预约信号避免向接收设备发送干扰信号。

公开(公告)号：WO2011163247A3

公开(公告)日：2012-05-10

申请号：PCT/US2011041272

申请日：2011-06-21

Applicant: QUALCOMM INC ,  VAN NEE DIDIER JOHANNES RICHARD ,  SAMPATH HEMANTH ,  VERMANI SAMEER ,  TANDRA RAHUL ,  VAN ZELST ALBERT ,  JONES VINCENT KNOWLES

Inventor： VAN NEE DIDIER JOHANNES RICHARD ,  SAMPATH HEMANTH ,  VERMANI SAMEER ,  TANDRA RAHUL ,  VAN ZELST ALBERT ,  JONES VINCENT KNOWLES

IPC: H04L25/02 ,  H04B7/06

CPC classification number: H04L25/0212 ,  H04B7/0626 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0228

Abstract: In a downlink multi-user multiple input multiple output (DL MU-MIMO) system, channel state information (CSI) feedback duration may strongly affect media access control (MAC) efficiency. While a time domain compression may give a significant reduction in feedback duration, the time domain compression may have complexity issues at the station (STA). In particular, for time domain compression, a large complex matrix multiplication may be required at the client to estimate a cyclic prefix (CP) length impulse response, which best models the frequency response of the channel. Embodiments of the invention comprise a hybrid scheme that may reduce the above complexity while maintaining significant compression gains.

Abstract translation: 在下行链路多用户多输入多输出（DL MU-MIMO）系统中，信道状态信息（CSI）反馈持续时间可能强烈地影响媒体访问控制（MAC）效率。 虽然时域压缩可以显着减少反馈持续时间，但是时域压缩可能在站（STA）处具有复杂性问题。 特别地，对于时域压缩，在客户端可能需要大的复矩阵乘法来估计循环前缀（CP）长度脉冲响应，其对信道的频率响应进行最佳建模。 本发明的实施例包括可以在保持显着的压缩增益的同时降低上述复杂性的混合方案。

公开(公告)号：WO2011106385A3

公开(公告)日：2011-12-01

申请号：PCT/US2011025873

申请日：2011-02-23

Applicant: QUALCOMM INC ,  VAN ZELST ALBERT ,  VAN NEE DIDIER JOHANNES RICHARD ,  AWATER GEERT ARNOUT

Inventor： VAN ZELST ALBERT ,  VAN NEE DIDIER JOHANNES RICHARD ,  AWATER GEERT ARNOUT

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/08

CPC classification number: H04B7/043 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0874

Abstract: Embodiments of the present disclosure present methods for calculating beamforming and spatial division multiple access (SDMA) weights utilizing minimum mean square error (MMSE) method. The beamforming and SDMA weights may also be normalized for further performance improvements. The transmitter selects one or more spatial dimensions of the channel matrices so that the number of spatial streams assigned to the receivers corresponding to the channel matrices is less than the number of receive antennas at the receivers.

Abstract translation: 本公开的实施例提供了使用最小均方误差（MMSE）方法来计算波束形成和空分多址（SDMA）权重的方法。 波束形成和SDMA权重也可以被归一化以用于进一步的性能改进。 发射机选择信道矩阵的一个或多个空间维度，使得分配给与信道矩阵对应的接收机的空间流的数量小于接收机处的接收天线的数量。

公开(公告)号：WO2010124232A3

公开(公告)日：2011-05-05

申请号：PCT/US2010032272

申请日：2010-04-23

Applicant: QUALCOMM INC ,  WENTINK MAARTEN MENZO ,  VAN ZELST ALBERT

Inventor： WENTINK MAARTEN MENZO ,  VAN ZELST ALBERT

IPC: H04B17/00

CPC classification number: H04B17/0062 ,  H04B7/0617 ,  H04B17/21

Abstract: This document describes, among other things, a method that includes transmitting a calibration initiation frame from a first wireless communication device to a second wireless communication device that comprises a single space-time stream transmitter via a wireless communication medium. The method also includes receiving at the first wireless communication device an acknowledgement frame sent from the second wireless communication device after the second wireless communication device receives the calibration initiation frame. The method further includes transmitting a null data packet (NDP) frame from the first wireless communication device to the second wireless communication device after receiving the acknowledgement frame. In some implementations, the method also includes performing beamforming calibration of a wireless communication channel between the first wireless communication device and the second wireless communication device based on the acknowledgement frame.

Abstract translation: 本文件尤其描述了一种方法，其包括将校准启动帧从第一无线通信设备发送到包括经由无线通信介质的单个时空流发送器的第二无线通信设备。 该方法还包括在第二无线通信设备接收到校准启动帧之后，在第一无线通信设备处接收从第二无线通信设备发送的确认帧。 该方法还包括：在接收到确认帧之后，从第一无线通信设备向第二无线通信设备发送空数据分组（NDP）帧。 在一些实施方式中，该方法还包括基于确认帧对第一无线通信设备和第二无线通信设备之间的无线通信信道进行波束成形校准。

公开(公告)号：WO2010093919A3

公开(公告)日：2011-01-20

申请号：PCT/US2010024097

申请日：2010-02-12

Applicant: QUALCOMM INC ,  WENTINK MAARTEN MENZO ,  VAN NEE DIDIER JOHANNES RICHARD ,  VAN ZELST ALBERT

Inventor： WENTINK MAARTEN MENZO ,  VAN NEE DIDIER JOHANNES RICHARD ,  VAN ZELST ALBERT

IPC: H04B7/06

CPC classification number: H04B7/0697 ,  H04B7/0452 ,  H04B7/0617

Abstract: Embodiments of the present disclosure generally relate to communication, and more specifically to distributed multiple-input multiple-output (MIMO) systems.

Abstract translation: 本公开的实施例一般涉及通信，更具体地涉及分布式多输入多输出（MIMO）系统。