公开(公告)号：US09564956B2

公开(公告)日：2017-02-07

申请号：US14270975

申请日：2014-05-06

Applicant: Broadcom Corporation

Inventor： David Garrett ,  Nihar Jindal ,  Jun Zheng ,  Srinath Puducheri Sundaravaradhan

IPC: H04B7/06 ,  H04B7/04 ,  H04L25/02

CPC classification number: H04B7/0617 ,  H04B7/0452 ,  H04B7/0619 ,  H04L25/0204 ,  H04L25/0226

Abstract: A systems and method of channel estimation can be used in wireless environments. The systems and method can: (a) determine, by a transmitter, a number of receivers with which to communicate wirelessly, the number of receivers being at least one and corresponding to at least a first receiver; and (b) generate, by the transmitter, a frame to transmit to the first receiver, the frame generated based on a total number of receivers that is higher than the determined number of receivers.

Abstract translation: 可以在无线环境中使用信道估计的系统和方法。 系统和方法可以：（a）由发射机确定与无线通信的接收机的数量，接收机的数目至少为一个，并对应于至少第一接收机; 和（b）由所述发射机产生一帧以发送给所述第一接收机，所述帧基于接收机总数高于所确定的接收机数量而生成。

公开(公告)号：US09282450B2

公开(公告)日：2016-03-08

申请号：US13931161

申请日：2013-06-28

Applicant: Broadcom Corporation

Inventor： Chengjin Zhang ,  Jun Zheng ,  Pieter van Rooyen

IPC: H04W8/00 ,  H04B7/04

CPC classification number: H04W8/005 ,  H04B7/0408

Abstract: Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a communication system, based on a signal for a user within a search range and at least one other signal for one other user within the search range. The search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals. The signal for the user may be selected from the search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the search range.

公开(公告)号：US20150341197A1

公开(公告)日：2015-11-26

申请号：US14814991

申请日：2015-07-31

Applicant: BROADCOM CORPORATION

Inventor： Ron Porat ,  Jun Zheng

IPC: H04L27/26 ,  H04W52/18

CPC classification number: H04L27/2618 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2666 ,  H04W52/18 ,  H04W72/1231 ,  H04W84/12

Abstract: Short training field (STF) for use within single user, multiple user, multiple access, and/or MIMO wireless communications. An STF design as is made such that the power associated with the tone indices at the edges of the STF design is relatively less than the power associated with the tone indices more centrally located within the STF design. Also, when multiple respective operational modes are supported (e.g., 1 MHz and 2 MHz), the respective STF designs corresponding to those respective operational modes have a great deal of similarity. For example, the respective STF designs for different respective operational modes may have certain common STF tone indices among those respective STF designs.

Abstract translation: 用于单用户，多用户，多路访问和/或MIMO无线通信的短训练场（STF）。 STF设计被做成使得与STF设计边缘处的色调指数相关联的功率相对于与位于STF设计中更集中的色调指数相关联的功率相对较小。 此外，当支持多个相应的操作模式（例如，1MHz和2MHz）时，对应于这些相应操作模式的相应STF设计具有大量的相似性。 例如，用于不同的各个操作模式的相应的STF设计可以在那些相应的STF设计中具有某些共同的STF色调索引。

公开(公告)号：US20150237639A1

公开(公告)日：2015-08-20

申请号：US14262328

申请日：2014-04-25

Applicant: Broadcom Corporation

Inventor： David Garrett ,  Jun Zheng ,  Nihar Jindal

IPC: H04W72/08 ,  H04W52/24

CPC classification number: H04W72/085 ,  H04L1/0003 ,  H04W52/241

Abstract: In some aspects, the disclosure is directed to methods and systems for transmitting packets (including but not limited to MU-MIMO packets). An access point communicating wirelessly with a plurality of devices can determine that a first packet for a first device of the plurality of devices has a first transmission duration. The access point can determine that a second packet for a second device of the plurality of devices has a second transmission duration shorter than the first transmission duration. The access point can adjust, based on the determination, a transmission power or a modulation and coding scheme to transmit the second packet during a third transmission duration. The third transmission duration can be greater than the second transmission duration.

Abstract translation: 在一些方面，本公开涉及用于传送分组（包括但不限于MU-MIMO分组）的方法和系统。 与多个设备无线通信的接入点可以确定多个设备中的第一设备的第一分组具有第一传输持续时间。 接入点可以确定多个设备中的第二设备的第二分组具有比第一传输持续时间短的第二传输持续时间。 接入点可以基于确定调整在第三传输持续时间期间发送第二分组的传输功率或调制和编码方案。 第三传输持续时间可以大于第二传输持续时间。

公开(公告)号：US20150222346A1

公开(公告)日：2015-08-06

申请号：US14243802

申请日：2014-04-02

Applicant: BROADCOM CORPORATION

Inventor： David Christopher GARRETT ,  Jun Zheng ,  Nihar Jindal

IPC: H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0623 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626

Abstract: A method for improving multiple-user (MU) multiple-input-multiple-output (MIMO) protocol efficiency includes transmitting an MU frame to multiple devices. The MU frame is beamformed to enable a corresponding one of the devices to receive an intended stream at high power. The MU frame includes an additional sounding-field. Acknowledgement (ACK) responses are received from at least some of the plurality of devices. Each of the ACK responses includes a sounding response frame including a channel feedback.

Abstract translation: 一种用于改善多用户（MU）多输入多输出（MIMO）协议效率的方法包括向多个设备发送MU帧。 MU帧被波束形成以使得相应的一个设备能够以高功率接收预期流。 MU帧包括附加的探测场。 从多个设备中的至少一些设备接收确认（ACK）响应。 ACK响应中的每一个包括包括信道反馈的探测响应帧。

公开(公告)号：US20150180558A1

公开(公告)日：2015-06-25

申请号：US14581302

申请日：2014-12-23

Applicant: Broadcom Corporation

Inventor： Jun Zheng ,  Chengjin Zhang ,  Pieter van Rooyen

IPC: H04B7/04 ,  H04L5/14

CPC classification number: H04B7/0452 ,  H04B7/0408 ,  H04B7/0413 ,  H04L5/1469

Abstract: Certain aspects of a method and system for processing signals in a communication system may include maximizing system capacity for a time division duplex (TDD) multiple-input multiple-output (MIMO) system, based on reducing a search range within which to find a group of signals having maximum channel gain. At least one of: a first signal for a first user and a second signal for a second user may be selected, which are both within the reduced search range, and which provides a maximum system capacity. The first signal for the first user may be selected from the reduced search range corresponding to a channel gain that is greater than a channel gain corresponding to a remaining portion of the reduced search range. The reduced search range may be generated by sorting a plurality of signals based on a channel gain corresponding to each of the plurality of signals.

Abstract translation: 用于处理通信系统中的信号的方法和系统的某些方面可以包括：基于减少在其中寻找组的搜索范围来最大化时分双工（TDD）多输入多输出（MIMO）系统的系统容量 的信号具有最大的信道增益。 可以选择以下中的至少一个：可以选择第一用户的第一信号和第二用户的第二信号，这两者都在缩小搜索范围内，并且提供最大的系统容量。 用于第一用户的第一信号可以从对应于比还原搜索范围的剩余部分对应的信道增益大的信道增益的缩小搜索范围中选择。 可以通过基于与多个信号中的每个信号相对应的信道增益对多个信号进行排序来生成缩小搜索范围。

公开(公告)号：US20150117569A1

公开(公告)日：2015-04-30

申请号：US14585305

申请日：2014-12-30

Applicant: BROADCOM CORPORATION

Inventor： Jun Zheng ,  Min Chuin Hoo ,  Vinko Erceg

IPC: H04L27/20

CPC classification number: H04L27/227 ,  H04B7/084 ,  H04L5/0026 ,  H04L5/0048 ,  H04L25/03866 ,  H04L27/20 ,  H04L27/2613 ,  H04L27/2621

Abstract: Phase rotation for preambles within multiple user, multiple access, and/or MIMO wireless communications. An appropriately designed phase rotation vector and/or appropriately designed cyclic shift delays (CSDs) are applied to respective sub-band components of the preamble. With appropriately designed CSDs, certain fields within the preamble are not modified. For example, a legacy short training field (L-STF) of the preamble is not changed when using appropriately designed CSDs. The respective CSDs may be implemented as integer multiples of a common CSD (e.g., 0×CSD, 1×CSD, 2×CSD, etc. such that one of the values of such a CSD vector may be zero [0], another may be the common CSD itself, etc.). Also, by employing an appropriately designed phase rotation vector and integer multiples of a CSD to a preamble, the respective peak to average power ratio (PAPR) between different respective fields within the preamble may be minimized.

公开(公告)号：US09680621B2

公开(公告)日：2017-06-13

申请号：US14248220

申请日：2014-04-08

Applicant: BROADCOM CORPORATION

Inventor： Jun Zheng ,  Nihar Jindal ,  David Christopher Garrett

IPC: H04L1/18 ,  H04L5/00 ,  H04B7/04 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/06 ,  H04L1/16

CPC classification number: H04L5/0055 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0626 ,  H04L1/1685 ,  H04L1/1825 ,  H04L5/0057

Abstract: A method for improving multiple-user (MU) multiple-input-multiple-output (MIMO) acknowledge (ACK) protocol efficiency includes: receiving a sounding frame from a device, sending a feedback response, which includes quantized channel state information (CSI) to the device, receiving an MU physical-layer protocol data unit (PPDU) frame from the device, and in response to receiving the MU PPDU frame, sending an ACK frame to the device without receiving a polling frame prior to the ACK frame.

公开(公告)号：US09444138B2

公开(公告)日：2016-09-13

申请号：US14275291

申请日：2014-05-12

Applicant: Broadcom Corporation

Inventor： David Garrett ,  Jun Zheng ,  Nihar Jindal

IPC: H04B7/00 ,  H01Q3/24 ,  H04L5/00

CPC classification number: H01Q3/24 ,  H04B7/0617 ,  H04B7/0689 ,  H04L5/0048

Abstract: In some aspects, the disclosure is directed to methods and systems for transmitting to static and non-static devices. An access point having a plurality of antennas can send a plurality of sounding frames from the plurality of antennas to a plurality of devices. The access point can identify, based on responses to the plurality of sounding frames, at least one static device from the plurality of devices. The access point can assign, based on the responses to the plurality of sounding frames, to each of the at least one static device, a corresponding one of the plurality of antennas for operation in a directional mode for transmissions to the corresponding static device, and the remaining antennas from the plurality of antennas for operation in an omnidirectional mode.

Abstract translation: 在一些方面，本公开涉及用于传送到静态和非静态设备的方法和系统。 具有多个天线的接入点可以将多个探测帧从多个天线发送到多个设备。 接入点可以基于对多个探测帧的响应来识别来自多个设备的至少一个静态设备。 所述接入点可以基于对所述多个探测帧的响应，将所述至少一个静态设备中的每一个分配给所述多个天线中的相应一个天线，用于以定向模式操作以传输到相应的静态设备，以及 来自多个天线的剩余天线用于全向模式的操作。

公开(公告)号：US09419699B2

公开(公告)日：2016-08-16

申请号：US14243802

申请日：2014-04-02

Applicant: BROADCOM CORPORATION

Inventor： David Christopher Garrett ,  Jun Zheng ,  Nihar Jindal

IPC: H04W4/00 ,  H04B7/06 ,  H04B7/04

CPC classification number: H04B7/0623 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626

Abstract: A method for improving multiple-user (MU) multiple-input-multiple-output (MIMO) protocol efficiency includes transmitting an MU frame to multiple devices. The MU frame is beamformed to enable a corresponding one of the devices to receive an intended stream at high power. The MU frame includes an additional sounding-field. Acknowledgement (ACK) responses are received from at least some of the plurality of devices. Each of the ACK responses includes a sounding response frame including a channel feedback.

Abstract translation: 一种用于改善多用户（MU）多输入多输出（MIMO）协议效率的方法包括向多个设备发送MU帧。 MU帧被波束形成以使得相应的一个设备能够以高功率接收预期流。 MU帧包括附加的探测场。 从多个设备中的至少一些设备接收确认（ACK）响应。 ACK响应中的每一个包括包括信道反馈的探测响应帧。