公开(公告)号：US08150330B2

公开(公告)日：2012-04-03

申请号：US12417961

申请日：2009-04-03

申请人： Chengjin Zhang ,  Jun Zheng ,  Pieter van Rooyen

发明人： Chengjin Zhang ,  Jun Zheng ,  Pieter van Rooyen

IPC分类号： H04B1/00 ,  H04M1/00

CPC分类号： H04B7/0452 ,  H04B7/0626 ,  H04B7/0643 ,  H04L1/0625 ,  H04L1/0693 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

摘要翻译： 提供了具有有限速率信道状态信息反馈的FDD多用户MIMO下行链路传输的范围缩小的贪婪搜索用户组选择方案。 该方法可以包括经由频分双工系统中的多个用户的通信信道接收反馈信息。 可以使用基于在缩小搜索范围内来自单个用户的信号的反馈信息或者基于来自单个用户的信号以及在搜索范围的剩余部分内的来自另一用户的至少一个其他信号来使系统容量最大化。 反馈信息可以包括用户的信道状态信息的量化增益和/或方向。

公开(公告)号：US20110294438A1

公开(公告)日：2011-12-01

申请号：US13205589

申请日：2011-08-08

申请人： Qinghua Li ,  Guangjie Li ,  Xintian E. Lin ,  Minnie Ho

发明人： Qinghua Li ,  Guangjie Li ,  Xintian E. Lin ,  Minnie Ho

IPC分类号： H04W4/00

CPC分类号： H04B7/0632 ,  H04B7/0641 ,  H04B7/0643 ,  H04L1/0025 ,  H04L1/0029

摘要： Methods and apparatuses for providing CQI feedback to a transmitter station are described herein. In one implementation, an apparatus may include a transceiver to transmit and receive signals to and from a transmitter station, and a controller coupled to the transceiver to control the transceiver to transmit to the transmitter station a first channel quality indicator (CQI) that corresponds to a first modulation level to be used by the transmitter station to transmit first signals, and to control the transceiver to transmit to the transmitter station a differential indicator that comprises two bits or less to differentially indicate a second CQI relative to the first CQI, wherein the second CQI corresponds to a second modulation level to be used by the transmitter station to transmit second signals. Other embodiments may be described and/or claimed.

摘要翻译： 本文描述了用于向发射机站提供CQI反馈的方法和装置。 在一个实现中，设备可以包括收发信机，用于向发射台发送信号和从发射机站接收信号，以及耦合到收发器的控制器，以控制收发信机向发射台发送对应于发射机的第一信道质量指示符（CQI） 要由发射机站用于发送第一信号的第一调制电平，并且控制收发信机向发射台发送包含两位或更少差分指示相对于第一CQI的第二CQI的差分指示符，其中， 第二CQI对应于由发射机站用于发射第二信号的第二调制电平。 可以描述和/或要求保护其他实施例。

公开(公告)号：US20110211474A1

公开(公告)日：2011-09-01

申请号：US13071600

申请日：2011-03-25

申请人： Chang-Soo Koo ,  Arty Chandra ,  Peter J. Voltz ,  Chia-Pang Yen ,  Jin Wang ,  Robert Lind Olesen

发明人： Chang-Soo Koo ,  Arty Chandra ,  Peter J. Voltz ,  Chia-Pang Yen ,  Jin Wang ,  Robert Lind Olesen

IPC分类号： H04L12/26

CPC分类号： H04L25/03343 ,  H04B7/0408 ,  H04B7/0626 ,  H04B7/0643 ,  H04B17/0085 ,  H04B17/21 ,  H04B17/24 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/0398 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03611 ,  H04L2025/03802

摘要： A method and apparatus for calibration and channel state feedback to support transmit beamforming in a multiple-input multiple-output (MIMO) system are disclosed. For radio frequency (RF) calibration, a first station (STA) sends a calibration request to a second STA, and the second STA sends a sounding packet to the first STA. The first STA receives the sounding packet, performs at least one channel measurement and performs calibration based on the channel measurement. For channel state feedback, the first STA sends a channel state feedback request to the second STA. The second STA sends a sounding packet to the first STA. The first STA receives the sounding packet and performs at least one channel measurement with the sounding packet. The first STA then calculates a steering matrix for transmit beamforming based on the channel measurement.

摘要翻译： 公开了一种用于校准和信道状态反馈以支持多输入多输出（MIMO）系统中的发射波束成形的方法和装置。 对于射频（RF）校准，第一站（STA）向第二STA发送校准请求，并且第二STA向第一STA发送探测分组。 第一STA接收探测包，执行至少一个信道测量，并根据信道测量进行校准。 对于信道状态反馈，第一STA向第二STA发送信道状态反馈请求。 第二STA向第一STA发送一个探测包。 第一STA接收探测分组，并用声音分组进行至少一个信道测量。 然后，第一STA基于信道测量来计算用于发射波束形成的导引矩阵。

公开(公告)号：US07920533B2

公开(公告)日：2011-04-05

申请号：US11680694

申请日：2007-03-01

申请人： Chang-Soo Koo ,  Jin Wang ,  Robert Lind Olesen ,  Arty Chandra ,  Peter J. Voltz ,  Chia-Pang Yen

发明人： Chang-Soo Koo ,  Jin Wang ,  Robert Lind Olesen ,  Arty Chandra ,  Peter J. Voltz ,  Chia-Pang Yen

IPC分类号： H04W4/00 ,  H04B7/00 ,  H04B17/00 ,  H04B1/00

CPC分类号： H04L25/03343 ,  H04B7/0408 ,  H04B7/0626 ,  H04B7/0643 ,  H04B17/0085 ,  H04B17/21 ,  H04B17/24 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/0242 ,  H04L25/0398 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03611 ,  H04L2025/03802

摘要： A method and apparatus for calibration and channel state feedback to support transmit beamforming in a multiple-input multiple-output (MIMO) system are disclosed. For radio frequency (RF) calibration, a first station (STA) sends a calibration request to a second STA, and the second STA sends a sounding packet to the first STA. The first STA receives the sounding packet, performs at least one channel measurement and performs calibration based on the channel measurement. For channel state feedback, the first STA sends a channel state feedback request to the second STA. The second STA sends a sounding packet to the first STA. The first STA receives the sounding packet and performs at least one channel measurement with the sounding packet. The first STA then calculates a steering matrix for transmit beamforming based on the channel measurement.

摘要翻译： 公开了一种用于校准和信道状态反馈以支持多输入多输出（MIMO）系统中的发射波束成形的方法和装置。 对于射频（RF）校准，第一站（STA）向第二STA发送校准请求，并且第二STA向第一STA发送探测分组。 第一STA接收探测包，执行至少一个信道测量，并根据信道测量进行校准。 对于信道状态反馈，第一STA向第二STA发送信道状态反馈请求。 第二STA向第一STA发送一个探测包。 第一STA接收探测分组，并用声音分组进行至少一个信道测量。 然后，第一STA基于信道测量来计算用于发射波束形成的导引矩阵。

公开(公告)号：US20110075607A1

公开(公告)日：2011-03-31

申请号：US12950139

申请日：2010-11-19

申请人： Joonsuk Kim ,  Matthew James Fischer ,  Peiman Amini ,  Vinko Erceg

发明人： Joonsuk Kim ,  Matthew James Fischer ,  Peiman Amini ,  Vinko Erceg

IPC分类号： H04W4/00

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0643 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0631 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0226

摘要： Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless communications. Within communication systems including multiple wireless communication devices (e.g., one or more APs, STAs, etc.), channel sounding of the selected communication links between the various wireless communication devices is performed. A MU-NDP announcement frame is transmitted to and received by various wireless communication devices indicating which of those wireless communication devices (e.g., one, some, or all) are being sounded. Then, respective NDP sounding frames are transmitted via the communication links corresponding to those wireless communication devices (e.g., one, some, or all) are being sounded, and sounding feedback signals are subsequently sent back to the original transmitting wireless communication device. In some instances, after transmission of the MU-NDP announcement frame, a clear to send (CTS) is sent from at least one of the wireless communication devices thereby precipitating the transmission of the NDP sounding frames.

摘要翻译： 多用户空数据分组（MU-NDP）在多用户，多路访问和/或MIMO无线通信中发声。 在包括多个无线通信设备（例如，一个或多个AP，STA等）的通信系统中，执行各种无线通信设备之间所选择的通信链路的信道探测。 MU-NDP通知帧被发送到各种无线通信设备并由各种无线通信设备接收，指示哪些无线通信设备（例如，一个，一个或全部）正在发声。 然后，通过与正在发声的那些无线通信设备（例如，一个或全部）相对应的通信链路发送各个NDP探测帧，随后将发声反馈信号发送回原始的发送无线通信设备。 在一些情况下，在发送MU-NDP通知帧之后，从无线通信设备中的至少一个发送清除发送（CTS），从而使得NDP探测帧的发送成为可能。

公开(公告)号：US07852954B2

公开(公告)日：2010-12-14

申请号：US11576440

申请日：2005-09-30

申请人： Bin Chul Ihm ,  Yong Suk Jin ,  Jin Young Chun

发明人： Bin Chul Ihm ,  Yong Suk Jin ,  Jin Young Chun

IPC分类号： H04K1/10 ,  H04L27/28 ,  H04L27/00 ,  H04L5/12 ,  H04L23/02 ,  H04L1/02 ,  H04B7/12

CPC分类号： H04B7/0417 ,  H04B7/0632 ,  H04B7/0636 ,  H04B7/0643 ,  H04L1/0026 ,  H04L1/0028 ,  H04L27/2626 ,  H04L27/2647

摘要： A method of feeding back channel information in an OFDM or OFDMA radio communications system is disclosed, in which a transmitting side instructs a region for measuring a downlink channel status and in which a receiving side feeds back the channel information to the transmitting side. The present invention includes the steps of transmitting instruction information instructing at least one region of at least two regions within a data frame as a signal measurement region to a receiving side and receiving the channel information estimated by a signal included in the signal measurement region instructed by the instruction information from the receiving side.

摘要翻译： 公开了一种在OFDM或OFDMA无线电通信系统中反馈信道信息的方法，其中发送侧指示区域测量下行链路信道状态，并且其中接收侧将信道信息反馈给发送侧。 本发明包括以下步骤：将指示数据帧内的至少两个区域的至少一个区域的指令信息作为信号测量区域发送到接收侧，并接收由包括在由信号测量区域指示的信号测量区域中的信号估计的信道信息， 来自接收侧的指令信息。

公开(公告)号：US07719993B2

公开(公告)日：2010-05-18

申请号：US11027300

申请日：2004-12-30

申请人： Qinghua Li ,  Xintian E. Lin

发明人： Qinghua Li ,  Xintian E. Lin

IPC分类号： H04L12/26

CPC分类号： H04B7/0413 ,  H04B7/0617 ,  H04B7/0643 ,  H04L1/0681

摘要： A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity.

摘要翻译： 当与作为开环MIMO设备操作的站通信时，无线网络接入点可以作为闭环MIMO设备操作。 校准接入点中的发送/接收链以支持聚合信道互易。

公开(公告)号：US20090253381A1

公开(公告)日：2009-10-08

申请号：US12417961

申请日：2009-04-03

申请人： Chengjin Zhang ,  Jun Zheng ,  Pieter van Rooyen

发明人： Chengjin Zhang ,  Jun Zheng ,  Pieter van Rooyen

IPC分类号： H04B1/00

CPC分类号： H04B7/0452 ,  H04B7/0626 ,  H04B7/0643 ,  H04L1/0625 ,  H04L1/0693 ,  H04L5/14 ,  H04L25/0204 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03426 ,  H04L2025/03802

摘要： Aspects of a greedy search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise receiving feedback information via a communication channel for a plurality of users in a frequency division duplex system. The system capacity may be maximized using the feedback information based on a signal from a single user within a reduced search range or based on the signal from the single user and at least one other signal from another user within a remaining portion of the search range. The feedback information may comprise quantized gain and/or direction of the channel state information of the users.

摘要翻译： 提供了具有有限速率信道状态信息反馈的FDD多用户MIMO下行链路传输的范围缩小的贪婪搜索用户组选择方案。 该方法可以包括经由频分双工系统中的多个用户的通信信道接收反馈信息。 可以使用基于在缩小搜索范围内来自单个用户的信号的反馈信息或者基于来自单个用户的信号以及在搜索范围的剩余部分内的来自另一用户的至少一个其他信号来使系统容量最大化。 反馈信息可以包括用户的信道状态信息的量化增益和/或方向。

公开(公告)号：US20080117815A1

公开(公告)日：2008-05-22

申请号：US11985769

申请日：2007-11-16

申请人： Yu-Seok Kim ,  In-Soo Hwang ,  Jin-Gon Joung ,  Yong-Hoon Lee ,  Kyung-Min Kim ,  Yong-Up Jang

发明人： Yu-Seok Kim ,  In-Soo Hwang ,  Jin-Gon Joung ,  Yong-Hoon Lee ,  Kyung-Min Kim ,  Yong-Up Jang

IPC分类号： G08C15/00

CPC分类号： H04B7/0452 ,  H04B7/0417 ,  H04B7/0626 ,  H04B7/0632 ,  H04B7/0643 ,  H04B7/065

摘要： An apparatus and method for performing sequential scheduling in a multiple-input, multiple-output (MIMO) system is provided. The method includes the steps of: selecting a user which reports the greatest partial feedback information among a plurality of pieces of partial feedback information of all users in an initialization operation, and requesting channel feedback information to the selected user; and broadcasting the channel feedback information of the selected user to remaining unselected users upon receiving the channel feedback information from the selected user. Accordingly, a maximum capacity can be obtained by using only selective channel feedback information without having to feed back channel state information of all users.

摘要翻译： 提供了一种用于在多输入多输出（MIMO）系统中执行顺序调度的装置和方法。 该方法包括以下步骤：在初始化操作中选择在所有用户的多条部分反馈信息中报告最大部分反馈信息的用户，并向所选择的用户请求信道反馈信息; 以及在从所选择的用户接收到信道反馈信息时，将所选择的用户的频道反馈信息广播到剩余的未选择的用户。 因此，通过仅使用选择性信道反馈信息，而不必反馈所有用户的信道状态信息，可以获得最大容量。

公开(公告)号：US20080032633A1

公开(公告)日：2008-02-07

申请号：US11462759

申请日：2006-08-07

申请人： ROBERT M. HARRISON ,  MANSOOR AHMED ,  ZHIJUN CAI

发明人： ROBERT M. HARRISON ,  MANSOOR AHMED ,  ZHIJUN CAI

IPC分类号： H04B7/00 ,  H04Q7/22

CPC分类号： H04B7/066 ,  H04B7/0632 ,  H04B7/0643

摘要： A feedback method in which a notification is received that a transmitting device has scheduled a transmission of data to the receiving device. Antenna feedback is generated in response to receipt of the notification. The antenna feedback is sent to the transmitting device. A mobile device includes a wireless network interface and a processor configured to receive a notification that a transmitting device has scheduled transmission of data to the mobile device, to generate antenna feedback in response to receipt of the notification, and to send the antenna feedback over the interface to the transmitting device.

摘要翻译： 一种反馈方法，其中接收到发送装置调度了向接收装置发送数据的通知。 响应于收到通知而产生天线反馈。 天线反馈被发送到发射设备。 移动设备包括无线网络接口和处理器，其被配置为接收发送设备已经向移动设备调度了数据传输的通知，以响应于接收到该通知而生成天线反馈，并且通过该天线反馈发送天线反馈 接口发送设备。