公开(公告)号：US09398598B2

公开(公告)日：2016-07-19

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：US09374245B2

公开(公告)日：2016-06-21

申请号：US14020179

申请日：2013-09-06

Applicant: Broadcom Corporation

Inventor： David Christopher Garrett ,  Nihar Jindal ,  Eric Jon Ojard ,  Alfonso Cano Pleite

IPC: H04B1/38 ,  H04L27/10 ,  H04L25/02 ,  H04L27/26 ,  H04B7/06

CPC classification number: H04L25/0204 ,  H04B7/0671 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/263 ,  H04L27/265

Abstract: A radio device receives a band-limited signal and estimates signal components beyond the band edges to extend the signal and eliminate the band-limited effects. The extended signal is transformed to the time domain to produce an estimate of the true time domain channel.

Abstract translation: 无线电设备接收频带限制信号并估计超出频带边缘的信号分量以扩展信号并消除频带限制效应。 扩展信号被转换到时域以产生真实时域信道的估计。

公开(公告)号：US09300501B2

公开(公告)日：2016-03-29

申请号：US14137222

申请日：2013-12-20

Applicant: Broadcom Corporation

Inventor： Nihar Jindal

IPC: H04L25/03 ,  H04B7/04 ,  H04B7/06

CPC classification number: H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04L25/03898 ,  H04W72/0413

Abstract: In a base station having a Massive Multiple Input Multiple Output (M-MIMO) antenna array, the availability of the M-MIMO antenna array is exploited to manage the interference caused by the base station to neighboring cells. In one embodiment, the large number of antenna elements of the M-MIMO antenna array are used to create precise transmit and/or receive spatial nulls at specific User Equipments (UEs) being served by a neighboring cell and/or in select areas of the neighboring cell. Depending on whether the spatial null is partial or full, transmissions by the base station may have reduced or even zero receive power within the neighboring cell.

Abstract translation: 在具有大规模多输入多输出（M-MIMO）天线阵列的基站中，利用M-MIMO天线阵列的可用性来管理由基站对相邻小区造成的干扰。 在一个实施例中，M-MIMO天线阵列的大量天线元件用于在由相邻小区服务的特定用户设备（UE）和/或在相邻小区的选定区域中创建精确的发射和/或接收空间零点 相邻单元格。 取决于空间空值是部分还是完全，基站的传输可能在相邻小区内具有减小的或甚至零的接收功率。

公开(公告)号：US09124317B1

公开(公告)日：2015-09-01

申请号：US14263766

申请日：2014-04-28

Applicant: Broadcom Corporation

Inventor： David Garrett ,  Jun Zheng ,  Nihar Jindal

IPC: H04B7/02 ,  H04B7/04 ,  H04L25/02 ,  H04B7/12 ,  H04L1/06

CPC classification number: H04B7/0617 ,  H04B7/0408 ,  H04B7/0452 ,  H04B7/0626 ,  H04B7/12 ,  H04L1/06 ,  H04L1/0618 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0228

Abstract: In some aspects, the disclosure is directed to methods and systems for performing channel estimation between a beamformer and a beamformee. A beamformer can determine that a beamformee is configured to perform channel estimation for up to a pre-configured number of transmit spatial streams from the beamformer. The pre-configured number of transmit spatial streams can be less than a plurality of transmit spatial streams of the beamformer. The beamformer can determine a plurality of subsets of transmit spatial streams from the plurality of transmit spatial streams. The beamformer can send a plurality of sounding frames to the beamformee for channel estimation based at least on the determined plurality of subsets of transmit spatial streams.

Abstract translation: 在一些方面，本公开涉及用于在波束形成器和波束形成器之间执行信道估计的方法和系统。 波束形成器可以确定波束形成器被配置为执行来自波束形成器的高达预配置数量的发射空间流的信道估计。 预配置的发射空间流数可以小于波束形成器的多个发射空间流。 波束形成器可以从多个发射空间流中确定发射空间流的多个子集。 波束形成器可以至少基于确定的多个传输空间流子集，向波束形成器发送多个探测帧用于信道估计。

公开(公告)号：US20150236770A1

公开(公告)日：2015-08-20

申请号：US14270975

申请日：2014-05-06

Applicant: Broadcom Corporation

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

IPC: H04B7/04 ,  H04B7/06 ,  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：US20150036772A1

公开(公告)日：2015-02-05

申请号：US14020179

申请日：2013-09-06

Applicant: Broadcom Corporation

Inventor： David Christopher Garrett ,  Nihar Jindal ,  Eric Jon Ojard ,  Alfonso Cano Pleite

IPC: H04L25/02 ,  H04B7/08

CPC classification number: H04L25/0204 ,  H04B7/0671 ,  H04L25/022 ,  H04L25/0224 ,  H04L27/263 ,  H04L27/265

Abstract: A radio device receives a band-limited signal and estimates signal components beyond the band edges to extend the signal and eliminate the band-limited effects. The extended signal is transformed to the time domain to produce an estimate of the true time domain channel.

Abstract translation: 无线电设备接收频带限制信号并估计超出频带边缘的信号分量以扩展信号并消除频带限制效应。 扩展信号被转换到时域以产生真实时域信道的估计。

公开(公告)号：US20140307653A1

公开(公告)日：2014-10-16

申请号：US14252646

申请日：2014-04-14

Applicant: BROADCOM CORPORATION

Inventor： Yong Liu ,  Ron Porat ,  Nihar Jindal ,  Vinko Erceg ,  Matthew James Fischer ,  Chiu Ngok Eric Wong

IPC: H04W72/04 ,  H04B7/26

CPC classification number: H04B7/2612 ,  H04W74/006

Abstract: A wireless communication device is implemented to include a communication interface and a processor. The processor is configured to process communications associated with the other wireless communication devices within the wireless communication system to determine one or more traffic characteristics of those communications as well as one or more class characteristics of the other wireless communication devices. The processor is configured to classify the communications into one or more access categories based on the one or more traffic characteristics and is configured to classify the other devices into one or more device class categories based on the one or more class characteristics. The processor is then configured to generate one or more channel access control signals based on these classifications. The communication interface of the device is configured to transmit the one or more channel access control signals to one or more of the other devices.

Abstract translation: 无线通信设备被实现为包括通信接口和处理器。 处理器被配置为处理与无线通信系统内的其他无线通信设备相关联的通信，以确定那些通信的一个或多个业务特性以及其它无线通信设备的一个或多个类别特性。 处理器被配置为基于一个或多个业务特性将通信分类为一个或多个访问类别，并且被配置为基于一个或多个类特征将其他设备分类为一个或多个设备类别类别。 然后，处理器被配置为基于这些分类生成一个或多个信道访问控制信号。 设备的通信接口被配置为将一个或多个信道访问控制信号发送到一个或多个其他设备。

公开(公告)号：US20140198705A1

公开(公告)日：2014-07-17

申请号：US14041225

申请日：2013-09-30

Applicant: BROADCOM CORPORATION

Inventor： Ron Porat ,  Nihar Jindal

IPC: H04W4/06

CPC classification number: H04L27/2602 ,  H04L1/04 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/006

Abstract: Communications are supported between wireless communication devices using OFDMA signaling and duplicate processing. An OFDMA frame, which includes first data intended for a first recipient device and second data intended for a second recipient device, is transmitted via a first sub-channel, and a duplicate of the OFDMA frame is transmitted via a second sub-channel. In some instances, additional duplicates of the OFDMA frame are transmitted via additional sub-channels. The OFDMA frame may be generated based on a first frequency and then down-clocked to a second frequency that corresponds to a bandwidth of one of the sub-channels. A wireless communication device configured to perform such operations may be compliant with one or more IEEE 802.11 communication standards, protocols, and/or recommended practices and may also be backward compatible with prior versions of IEEE 802.11. Different numbers of sub-channels and sub-channels of different bandwidths may be used to different times.

Abstract translation: 在使用OFDMA信令和重复处理的无线通信设备之间支持通信。 包括用于第一接收方设备的第一数据和第二接收设备的第二数据的OFDMA帧经由第一子信道被发送，并且经由第二子信道发送OFDMA帧的副本。 在一些情况下，通过附加子信道发送OFDMA帧的附加副本。 OFDMA帧可以基于第一频率产生，然后被下变频到对应于一个子信道的带宽的第二频率。 被配置为执行这种操作的无线通信设备可以符合一个或多个IEEE 802.11通信标准，协议和/或推荐做法，并且还可以向后兼容IEEE 802.11的先前版本。 不同数量的不同带宽的子信道和子信道可以用于不同的时间。

公开(公告)号：US09806860B2

公开(公告)日：2017-10-31

申请号：US14838452

申请日：2015-08-28

Applicant: BROADCOM CORPORATION

Inventor： Stephanie Felicia Pereira ,  Matthew James Fischer ,  Ron Porat ,  Nihar Jindal

IPC: H04W4/00 ,  H04L5/00 ,  H04W74/06 ,  H04W88/08 ,  H04W74/00

CPC classification number: H04L5/0007 ,  H04L5/0044 ,  H04L5/0055 ,  H04W74/006 ,  H04W74/06 ,  H04W88/08

Abstract: A wireless communication device (alternatively, device) includes a processor configured to support communications with other wireless communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other device(s) and to generate and process signals for such communications. A device generates and transmits a resource and association poll frame (ra-poll frame) to other device(s). The contents of ra-poll frame direct which of the other device(s) is authorized to respond to the device (e.g., authorized device(s)) and the manner in which they are authorized to respond. Authorized device(s) transmit responses that may include association request(s) and/or a resource request(s), among other types of communications. The device then generates and transmits acknowledgement(s) (ACK(s)) indicates successful receipt of any responses from the authorized device(s).

公开(公告)号：US09693385B2

公开(公告)日：2017-06-27

申请号：US14221438

申请日：2014-03-21

Applicant: BROADCOM CORPORATION

Inventor： Vinko Erceg ,  Ron Porat ,  Nihar Jindal ,  Matthew James Fischer ,  Yong Liu ,  Chiu Ngok Eric Wong

IPC: H04W80/00

CPC classification number: H04W80/00

Abstract: A wireless communication device is configured to generate frames based on any of a number of different frame formats for transmission to one or more other recipient wireless communication devices. The frame may be implemented to include data intended for two or more recipient devices. The device encodes first data intended for a first recipient device using first one or more coding parameters and encodes second data intended for a second recipient device using second one or more coding parameters. The manner by which the first and second data have been encoded is indicated within one or more other fields within the frames based on the selected frame format. In one example, a single preamble specifies the first and second one or more coding parameters. In another example, an initial preamble and one or more respective sub-preambles specify the first and second one or more coding parameters.