公开(公告)号：US09876552B2

公开(公告)日：2018-01-23

申请号：US15012427

申请日：2016-02-01

Applicant: QUALCOMM Incorporated

Inventor： Chin-Hung Chen ,  Youhan Kim ,  Albert van Zelst ,  Ning Zhang

IPC: H04B7/06 ,  H04B17/318 ,  H04W52/24 ,  H04W84/12 ,  H04L25/02

CPC classification number: H04B7/0626 ,  H04B7/0617 ,  H04B17/318 ,  H04L25/0204 ,  H04L25/0228 ,  H04W52/241 ,  H04W84/12

Abstract: A method of adjusting single-stream transmissions by a wireless device based on channel state information (CSI). The wireless device generates a sounding packet formatted for transmission via multiple spatial streams, and transmits the sounding packet to a receiving device via a single one of the multiple spatial streams. For example, the wireless device may be a single-antenna device. The wireless device further receives channel state information (CSI) from the receiving device based at least in part on the sounding packet. The wireless device then adjusts one or more characteristics of single-stream transmissions to the receiving device based at least in part on the received CSI.

公开(公告)号：US20170134075A1

公开(公告)日：2017-05-11

申请号：US15261019

申请日：2016-09-09

Applicant: QUALCOMM Incorporated

Inventor： Chin-Hung Chen ,  Ning Zhang ,  Youhan Kim

IPC: H04B7/04 ,  H04B7/06 ,  H04W72/04

Abstract: A method for determining uplink channel information includes sending a trigger frame from an access point of a wireless network to a plurality of stations in the wireless network. The method also includes receiving an uplink transmission from at least one station of the plurality of stations in response to sending the trigger frame. The method further includes determining uplink channel data based on the uplink transmission. The method also includes sending the uplink channel data to the at least one station. The uplink channel data is usable by the at least one station to send data to the access point.

公开(公告)号：US20140269964A1

公开(公告)日：2014-09-18

申请号：US14059073

申请日：2013-10-21

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Qinghai Gao ,  James Simon Cho ,  Chin-Hung Chen ,  Didier Johannes Richard Van Nee

IPC: H04B7/04

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0691 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/009 ,  H04L1/06 ,  H04L1/1621 ,  H04L1/1685

Abstract: An access point can include an array of antennas and a smart antenna selector. The smart antenna selector is configured to select a subset of antennas from the antenna array for use in multi-user multiple-input multiple-output (MU MIMO) data transmissions. Stations that are communicatively coupled to the access point can be selected for inclusion in a multi-user group based, at least in part, on performance measurements of the stations. Performance measurements are determined directly and indirectly from data transmissions sent in response to sounding packets. Antennas for use in MU MIMO data transmissions are selected for the antenna array based, at least in part, on previous antenna selections used for single user data transmissions.

Abstract translation: 接入点可以包括天线阵列和智能天线选择器。 智能天线选择器被配置为从天线阵列中选择天线的子集，以用于多用户多输入多输出（MU MIMO）数据传输。 可以至少部分地基于站的性能测量来选择通信地耦合到接入点的站点以包括在多用户组中。 性能测量直接和间接地从响应于声音分组发送的数据传输确定。 至少部分地基于用于单用户数据传输的先前天线选择天线阵列来选择用于MU MIMO数据传输的天线。

公开(公告)号：US20130316665A1

公开(公告)日：2013-11-28

申请号：US13956254

申请日：2013-07-31

Applicant: QUALCOMM Incorporated

Inventor： Youhan Kim ,  Ning Zhang ,  Chin-Hung Chen

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H03M13/6312 ,  H04B7/0413 ,  H04L1/0071 ,  H04L1/0606 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0064 ,  H04L27/2626 ,  H04L27/2647

Abstract: A wireless transmitter can include a plurality of bandwidth modules, each bandwidth module processing data based on a predetermined frequency band. In one embodiment, such a wireless transmitter can include encoding components for receiving transmit data and generating encoded data. A multiple-input multiple-output (MIMO) stream parser can receive the encoded data and generate a plurality of MIMO streams. A first module parser coupled to a first MIMO stream can generate a first plurality of partial MIMO streams. A first bandwidth module can include a first interleaver that interleaves bits of the first partial MIMO stream and generates first interleaved data. A second bandwidth module can include a second interleaver that interleaves bits of the second partial MIMO stream and generates second interleaved data. A first inverse fast Fourier transform (IFFT) unit can combine and process the first and second interleaved data and generate a first transmission MIMO stream.

Abstract translation: 无线发射机可以包括多个带宽模块，每个带宽模块基于预定频带处理数据。 在一个实施例中，这样的无线发射机可以包括用于接收发送数据和生成编码数据的编码组件。 多输入多输出（MIMO）流解析器可以接收编码数据并产生多个MIMO流。 耦合到第一MIMO流的第一模块解析器可以生成第一多个部分MIMO流。 第一带宽模块可以包括交织第一部分MIMO流的比特并产生第一交织数据的第一交织器。 第二带宽模块可以包括交织第二部分MIMO流的比特并产生第二交织数据的第二交织器。 第一逆快速傅里叶变换（IFFT）单元可以组合并处理第一和第二交错数据并生成第一传输MIMO流。

公开(公告)号：US11632273B1

公开(公告)日：2023-04-18

申请号：US17457402

申请日：2021-12-02

Applicant: QUALCOMM Incorporated

Inventor： Meriam Rezk ,  Deniz Rende ,  Kapil Rai ,  Chin-Hung Chen

IPC: H04L1/02 ,  H04L25/02 ,  H04B7/0452 ,  H04B7/0426 ,  H04L1/00

Abstract: This disclosure provides methods, devices and systems for determining unavailable spatial streams in uplink multiuser (MU) multiple-in multiple-out (MIMO) communication. In one example, a device transmits, to wireless stations including a first wireless station, a trigger frame configured to elicit a joint transmission, to the device, of a MU packet over spatial streams respectively associated with the wireless stations. The device receives the MU packet over the spatial streams, where each spatial stream of the spatial streams is received by receive chains of the device. The device performs a channel estimation associated with each spatial stream of the spatial streams using each receive chain of the receive chains. The device determines that at least one spatial stream associated with the first wireless station is unavailable based on the channel estimation. The device processes the MU packet from the plurality of spatial streams without the at least one spatial stream.

公开(公告)号：US09749874B2

公开(公告)日：2017-08-29

申请号：US13943872

申请日：2013-07-17

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Ning Zhang ,  Zhen Xie ,  James Simon Cho ,  Chin-Hung Chen ,  Kai Shi

IPC: H04W16/26 ,  H04W76/02 ,  H04L12/725 ,  H04L12/851 ,  H04W28/02 ,  H04W88/10 ,  H04W84/04 ,  H04W84/12

CPC classification number: H04W16/26 ,  H04L45/304 ,  H04L47/24 ,  H04W28/0205 ,  H04W76/15 ,  H04W84/047 ,  H04W84/12 ,  H04W88/10

Abstract: Methods, systems, devices, and apparatuses are described for wireless communications in which first type of traffic may be transmitted from a gateway access point (AP) directly to a station. Beacon signals transmitted to the station are transmitted as part of the first type of traffic. A second type of traffic may be transmitted from the gateway AP to the station via at least one relay AP. The first type of traffic may include low-throughput traffic and may be transmitted over a long-range radio link (e.g., 2 GHz band link or sub-1 GHz band link). The second type of traffic may include high-throughput traffic and may be transmitted over at least one short-range radio link (e.g., 5 GHz band link). The gateway AP may receive low-throughput traffic directly from the station and high-throughput traffic from the station via the at least one relay AP.

公开(公告)号：US20170222706A1

公开(公告)日：2017-08-03

申请号：US15012427

申请日：2016-02-01

Applicant: QUALCOMM Incorporated

Inventor： Chin-Hung Chen ,  Youhan Kim ,  Albert van Zelst ,  Ning Zhang

IPC: H04B7/06 ,  H04W52/24 ,  H04B17/318

CPC classification number: H04B7/0626 ,  H04B7/0617 ,  H04B17/318 ,  H04L25/0204 ,  H04L25/0228 ,  H04W52/241 ,  H04W84/12

Abstract: A method of adjusting single-stream transmissions by a wireless device based on channel state information (CSI). The wireless device generates a sounding packet formatted for transmission via multiple spatial streams, and transmits the sounding packet to a receiving device via a single one of the multiple spatial streams. For example, the wireless device may be a single-antenna device. The wireless device further receives channel state information (CSI) from the receiving device based at least in part on the sounding packet. The wireless device then adjusts one or more characteristics of single-stream transmissions to the receiving device based at least in part on the received CSI.

公开(公告)号：US09124318B2

公开(公告)日：2015-09-01

申请号：US14059073

申请日：2013-10-21

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Qinghai Gao ,  James Simon Cho ,  Chin-Hung Chen ,  Didier Johannes Richard Van Nee

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04B7/0452 ,  H04B7/0617 ,  H04B7/0691 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/009 ,  H04L1/06 ,  H04L1/1621 ,  H04L1/1685

Abstract: An access point can include an array of antennas and a smart antenna selector. The smart antenna selector is configured to select a subset of antennas from the antenna array for use in multi-user multiple-input multiple-output (MU MIMO) data transmissions. Stations that are communicatively coupled to the access point can be selected for inclusion in a multi-user group based, at least in part, on performance measurements of the stations. Performance measurements are determined directly and indirectly from data transmissions sent in response to sounding packets. Antennas for use in MU MIMO data transmissions are selected for the antenna array based, at least in part, on previous antenna selections used for single user data transmissions.

Abstract translation: 接入点可以包括天线阵列和智能天线选择器。 智能天线选择器被配置为从天线阵列中选择天线的子集，以用于多用户多输入多输出（MU MIMO）数据传输。 可以至少部分地基于站的性能测量来选择通信地耦合到接入点的站点以包括在多用户组中。 性能测量直接和间接地从响应于声音分组发送的数据传输确定。 至少部分地基于用于单用户数据传输的先前天线选择天线阵列来选择用于MU MIMO数据传输的天线。

公开(公告)号：US10171265B2

公开(公告)日：2019-01-01

申请号：US15260144

申请日：2016-09-08

Applicant: QUALCOMM Incorporated

Inventor： Chin-Hung Chen ,  Ning Zhang ,  Youhan Kim

IPC: H04L25/02 ,  H04B7/0413 ,  H04B7/06 ,  H04L27/26 ,  H04B7/0452 ,  H04W72/04 ,  H04W84/12

Abstract: A method for sending data includes receiving, at a first station of a plurality of stations, a trigger frame from an access point of a wireless network. The method also includes determining a downlink channel estimation based on the trigger frame and sending the downlink channel estimation to the access point. The method further includes receiving uplink channel data from the access point in response to sending the downlink channel estimation. The method also includes sending data to the access point based on the uplink channel data.

公开(公告)号：US09331761B2

公开(公告)日：2016-05-03

申请号：US14871834

申请日：2015-09-30

Applicant: QUALCOMM Incorporated

Inventor： Youhan Kim ,  Ning Zhang ,  Chin-Hung Chen

IPC: H04B7/02 ,  H04B7/04 ,  H04L1/00 ,  H04L1/06 ,  H04L5/00 ,  H03M13/00 ,  H04L27/26

CPC classification number: H04B7/0456 ,  H03M13/6312 ,  H04B7/0413 ,  H04L1/0071 ,  H04L1/0606 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0064 ,  H04L27/2626 ,  H04L27/2647

Abstract: A wireless transmitter can include a plurality of bandwidth modules, each bandwidth module processing data based on a predetermined frequency band. In one embodiment, such a wireless transmitter can include encoding components for receiving transmit data and generating encoded data. A multiple-input multiple-output (MIMO) stream parser can receive the encoded data and generate a plurality of MIMO streams. A first module parser coupled to a first MIMO stream can generate a first plurality of partial MIMO streams. A first bandwidth module can include a first interleaver that interleaves bits of the first partial MIMO stream and generates first interleaved data. A second bandwidth module can include a second interleaver that interleaves bits of the second partial MIMO stream and generates second interleaved data. A first inverse fast Fourier transform (IFFT) unit can combine and process the first and second interleaved data and generate a first transmission MIMO stream.