公开(公告)号：US10206122B2

公开(公告)日：2019-02-12

申请号：US15121044

申请日：2015-02-24

申请人： MEDIATEK INC. ,  James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare, Jr. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu

发明人： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare, Jr. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu

IPC分类号： H04W16/22 ,  G01S3/74 ,  G01S3/14 ,  G01S5/12 ,  G01S1/08 ,  H04L5/00 ,  H04L29/06 ,  H04B7/06 ,  H04B17/318 ,  G01S5/06 ,  H04W4/02 ,  G01S5/02 ,  H04W24/10 ,  H04W64/00 ,  H04W4/04 ,  H04W84/12

摘要： A method of direction finding (DF) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas simultaneously, which allows a receiving device to resolve multiple DF sounding signals transmitted from the multiple antennas. As a result, angle of departure (AoD) of the transmitting device can be estimated by using the multiple resolved DF sounding signals from each antenna for DF positioning purpose.

公开(公告)号：US08457026B1

公开(公告)日：2013-06-04

申请号：US12699781

申请日：2010-02-03

申请人： Keang-Po Ricky Ho ,  Jianhan Liu ,  Guocong Song ,  Karim Nassiri Toussi ,  Jeffrey M. Gilbert

发明人： Keang-Po Ricky Ho ,  Jianhan Liu ,  Guocong Song ,  Karim Nassiri Toussi ,  Jeffrey M. Gilbert

IPC分类号： H04B7/00 ,  H01Q3/00

CPC分类号： H01Q3/30 ,  H04B7/0617 ,  H04B7/0619

摘要： Enhanced wireless speeds are obtained using multiple transmission beams. In one example, a transmitter has a signal processor to receive a plurality of data streams, a plurality of analog converters each coupled to the signal processor to receive the plurality of data streams from the signal processor and to modulate the data streams onto carrier waves, and a plurality of phase shifters each coupled to an analog converter to each receive a modulated stream. A first antenna is coupled to more than one of the plurality of phase shifters to receive the modulated data stream from each phase shifter and transmit it on its respective carrier wave, and a second antenna is coupled to receive at least one modulated data stream and transmit it on its respective carrier wave.

摘要翻译： 使用多个发射波束获得增强的无线速度。 在一个示例中，发射机具有用于接收多个数据流的信号处理器，多个模拟转换器，每个模拟转换器耦合到信号处理器以从信号处理器接收多个数据流并且将数据流调制到载波上， 以及多个移相器，每个移相器耦合到模拟转换器以各自接收经调制的流。 第一天线耦合到多个移相器中的多于一个移相器以接收来自每个移相器的调制数据流，并在其相应的载波上进行发送，并且第二天线被耦合以接收至少一个调制数据流并传输 它在其各自的载波上。

公开(公告)号：US20080101467A1

公开(公告)日：2008-05-01

申请号：US11588263

申请日：2006-10-27

申请人： Samuel J. MacMullan ,  Tandhoni S. Rao ,  Jeff Winston ,  Jianhan Liu ,  Ming Zhang

发明人： Samuel J. MacMullan ,  Tandhoni S. Rao ,  Jeff Winston ,  Jianhan Liu ,  Ming Zhang

IPC分类号： H04N7/12

CPC分类号： H04N7/12 ,  G06F3/14 ,  G09G5/006 ,  G09G5/02 ,  H04N7/0135 ,  H04N7/0142 ,  H04N7/015

摘要： The present invention is directed to methods and systems for enabling secure and efficient wireless transmission of HDCP-encrypted high definition (HD) signals. In one aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content to enable direct wireless transmission of HD content. In another aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content that are compatible with HDCP encryption of content. In a further aspect, the present invention provides methods and systems for reducing the data rate required to convey HD content while maintaining a high quality of content.

摘要翻译： 本发明涉及用于实现HDCP加密的高清晰度（HD）信号的安全和有效的无线传输的方法和系统。 在一个方面，本发明提供了用于降低传送HD内容以实现HD内容的直接无线传输所需的数据速率的方法和系统。 在另一方面，本发明提供了用于降低传送与内容的HDCP加密兼容的HD内容所需的数据速率的方法和系统。 在另一方面，本发明提供了用于降低传送HD内容同时保持高质量内容所需的数据速率的方法和系统。

公开(公告)号：US20170070893A1

公开(公告)日：2017-03-09

申请号：US15121044

申请日：2015-02-24

申请人： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare, JR. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu ,  MEDIATEK INC.

发明人： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare Jr. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu

IPC分类号： H04W16/22 ,  H04L29/06 ,  H04B7/06 ,  H04L5/00

CPC分类号： H04W16/225 ,  G01S3/14 ,  G01S3/74 ,  G01S5/0252 ,  G01S5/06 ,  G01S5/12 ,  G01S13/825 ,  H04B7/0617 ,  H04B17/318 ,  H04L5/0048 ,  H04L5/005 ,  H04L69/22 ,  H04W4/02 ,  H04W4/023 ,  H04W4/043 ,  H04W24/10 ,  H04W64/00 ,  H04W84/12

摘要： A method of direction finding (DF) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas simultaneously, which allows a receiving device to resolve multiple DF sounding signals transmitted from the multiple antennas. As a result, angle of departure (AoD) of the transmitting device can be estimated by using the multiple resolved DF sounding signals from each antenna for DF positioning purpose.

摘要翻译： 提出了一种在无线定位区域网络（WLAN）中的方向搜索（DF）定位的方法。 多天线IEEE 802.11发射设备可以同时在多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备解析从多个天线发送的多个DF探测信号。 结果，可以通过使用来自每个天线的多个分辨的DF探测信号来估计发射装置的出发角（AoD），用于DF定位目的。

公开(公告)号：US20160353275A1

公开(公告)日：2016-12-01

申请号：US15117448

申请日：2015-02-10

申请人： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare Jr. ,  MEDIATEK INC.

发明人： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare Jr.

IPC分类号： H04W8/26 ,  H04L12/823 ,  H04W48/16

CPC分类号： H04W8/26 ,  H04L47/32 ,  H04W16/10 ,  H04W48/16 ,  H04W84/12

摘要： A method for identifying source BSS in WLAN is proposed. A high efficiency (HE) access point (AP) sends a packet containing a basic service set (BSS) color to a HE station. The HE AP also sends a packet containing an assigned association identification (AID) to a very high throughput (VHT) station. The assigned AID comprises at least part of the BSS color information. The VHT station therefore sends a packet containing the at least part of the BSS color information such that any AP or station that receives the packet can determine the BSS the VHT station is in.

摘要翻译： 提出了一种识别WLAN中源BSS的方法。 高效（HE）接入点（AP）向HE站发送包含基本服务集（BSS）颜色的分组。 HE AP还将包含分配的关联标识（AID）的分组发送到非常高的吞吐量（VHT）站。 分配的AID包括BSS颜色信息的至少一部分。 因此，VHT站发送包含BSS颜色信息的至少一部分的分组，使得接收分组的任何AP或站可以确定VHT站所在的BSS。

公开(公告)号：US08902921B2

公开(公告)日：2014-12-02

申请号：US13587902

申请日：2012-08-16

申请人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

发明人： Jianhan Liu ,  James June-Ming Wang ,  YungPing Hsu

IPC分类号： H04B7/212 ,  H04B7/04 ,  H04L25/02

CPC分类号： H04B7/0452 ,  H04L25/0204 ,  H04L25/0224

摘要： The present invention proposes methods for facilitating and improving the performance of MU-MIMO transmission in wireless communication systems. Each user within a MU group inserts an inter-user interference indication field in its acknowledgement packet. The inter-user interference indication field includes signal-to-interference-noise-ratio (SINR) and interference source information. The MU-MIMO transmitter extracts inter-user interference indication feedback and improves subsequent MU-MIMO transmission. Feedback of the inter-user interference information such as SINR and interference source allows efficient link adaptation, smarter user selection, channel re-sounding selection, and fine-tuning of precoding matrix.

摘要翻译： 本发明提出了促进和改进无线通信系统中MU-MIMO传输性能的方法。 MU组内的每个用户在其确认分组中插入用户间干扰指示字段。 用户间干扰指示字段包括信号与干扰噪声比（SINR）和干扰源信息。 MU-MIMO发射机提取用户间干扰指示反馈并改进随后的MU-MIMO传输。 诸如SINR和干扰源之类的用户间干扰信息的反馈允许有效的链路自适应，更智能的用户选择，信道重新选择以及预编码矩阵的微调。

公开(公告)号：US20130010632A1

公开(公告)日：2013-01-10

申请号：US13635341

申请日：2011-10-20

申请人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

发明人： James June-Ming Wang ,  Vishakan Ponnampalam ,  Jianhan Liu ,  Chao-Chun Wang ,  Huanchun Ye

IPC分类号： H04W24/10

CPC分类号： H04B17/309 ,  H04B17/24

摘要： A method of simultaneously providing channel quality feedback information in all valid sub-channels is provided to facilitate and improve the performance of dynamic transmission bandwidth adjustment and fast link adaptation. A receiving device receives a sounding signal over a wide channel in a wireless system. The sounding signal is transmitted from a transmitting device over multiple sub-channels of the wide channel. The receiving device estimates channel quality information based on the sounding signal for each sub-channel. The channel quality information includes estimated average SNR and recommended MCS and other channel quality metrics. The receiving device transmits a feedback message to the transmitting device. The feedback message contains the estimated channel quality information for all valid sub-channels within the transmission bandwidth. The transmitting device performs dynamic transmission bandwidth selection and fast link adaptation based on the channel quality information for all valid sub-channels.

摘要翻译： 提供了一种在所有有效子信道中同时提供信道质量反馈信息的方法，以促进和改进动态传输带宽调整和快速链路自适应的性能。 接收设备在无线系统中通过宽频道接收探测信号。 探测信号通过宽信道的多个子信道从发送设备发送。 接收装置基于每个子信道的探测信号来估计信道质量信息。 信道质量信息包括估计的平均SNR和推荐的MCS等信道质量度量。 接收装置向发送装置发送反馈消息。 反馈消息包含传输带宽内所有有效子信道的估计信道质量信息。 发送设备根据所有有效子信道的信道质量信息，执行动态传输带宽选择和快速链路自适应。

公开(公告)号：US09572192B2

公开(公告)日：2017-02-14

申请号：US13635333

申请日：2011-10-18

申请人： Chao-Chun Wang ,  Jianhan Liu ,  Chih-Shi Yee ,  Huanchun Ye ,  James June-Ming Wang

发明人： Chao-Chun Wang ,  Jianhan Liu ,  Chih-Shi Yee ,  Huanchun Ye ,  James June-Ming Wang

IPC分类号： H04W76/04 ,  H04W28/18 ,  H04W48/08 ,  H04W72/00 ,  H04W76/02

CPC分类号： H04W76/20 ,  H04W28/18 ,  H04W48/08 ,  H04W72/00 ,  H04W72/0453 ,  H04W76/10 ,  H04W84/12

摘要： A method of supporting incompatible channelization in a wireless communications system is provided. A coordinating device determines a first set of physical parameters of a first wireless channel. The first set of physical parameters includes a channel bandwidth, a central frequency, a transmit power limit, and a modulation and coding scheme. The coordinating device establishes communication with a first set of communications devices over the first wireless channel. The coordinating device then broadcasts a channel-adjustment message and determines a protection period. The channel-adjustment message comprises a set of instructions on how to adjust to a second set of physical parameters of a second wireless channel. A second set of communications devices adjust physical parameters based on the channel-adjustment message. Finally, the coordinating device communicates with the second set of communications devices over the second wireless channel during the protection period.

摘要翻译： 提供了一种在无线通信系统中支持不兼容信道化的方法。 协调装置确定第一无线信道的第一组物理参数。 第一组物理参数包括信道带宽，中心频率，发射功率限制以及调制和编码方案。 协调设备通过第一无线信道与第一组通信设备建立通信。 协调装置然后广播频道调整消息并确定保护期。 信道调整消息包括关于如何调整到第二无线信道的第二组物理参数的一组指令。 第二组通信设备根据信道调整消息调整物理参数。 最后，协调装置在保护期间通过第二无线信道与第二组通信装置进行通信。

公开(公告)号：US20160366548A1

公开(公告)日：2016-12-15

申请号：US15121049

申请日：2015-02-24

申请人： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare Jr. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu ,  MEDIATEK INC.

发明人： James June-Ming Wang ,  Jianhan Liu ,  Thomas Edward Pare, JR. ,  Tianyu Wu ,  Gabor Bajko ,  Yung-Ping Hsu

IPC分类号： H04W4/02 ,  G01S5/02 ,  H04W24/10 ,  G01S5/06 ,  H04B17/318 ,  H04L5/00

摘要： A method of combined direction finding (DF) and fine timing measurement (FTM) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device (AP) can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas, which allows a receiving device (STA) to resolve multiple DF sounding signals transmitted from the multiple antennas and thereby estimating angle of departure (AoD). On the other hand, the AP can estimate angle of arrival (AoA) from radio signals transmitted from the STA. When the radial resolution error of AoD or AoA positioning increases, DF positioning and fine-timing measurement (FTM) ranging can be jointly applied to reduce the radial resolution error and extends the AoD/AoA service area with positing accuracy.

摘要翻译： 提出了一种在无线定位区域网络（WLAN）中组合方向搜索（DF）和精确定时测量（FTM）定位的方法。 多天线IEEE 802.11发射设备（AP）可以在来自多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备（STA）解析从多个天线发送的多个DF探测信号 从而估计出发角度（AoD）。 另一方面，AP可以从STA发送的无线电信号估计到达角（AoA）。 当AoD或AoA定位的径向分辨率误差增大时，可以共同应用DF定位和精确定时测量（FTM）测距，以减小径向分辨率误差，并以准确的精度扩展AoD / AoA服务区域。

公开(公告)号：US08588193B1

公开(公告)日：2013-11-19

申请号：US12699758

申请日：2010-02-03

申请人： Keangpo Ricky Ho ,  Jianhan Liu ,  Guocong Song ,  Karim Nassiri Toussi ,  Jeffrey M. Gilbert

发明人： Keangpo Ricky Ho ,  Jianhan Liu ,  Guocong Song ,  Karim Nassiri Toussi ,  Jeffrey M. Gilbert

IPC分类号： H04W4/00

CPC分类号： H01Q3/30 ,  H04B7/0617 ,  H04B7/0619

摘要： Enhanced wireless speeds are obtained using multiple transmission beams. In one example a transmitter sends data packets through an antenna array using multiple spatial beams and a plurality of analog converters. A receiver receives feedback from a remote station, the feedback including a quality measure of data packets received from the transmitter. A processor to controls transmission parameters of the transmitter using the feedback, the processor having a plurality of states, in a first channel analysis state, the processor determining a beam-forming vector for the antenna array, in a second beam search and training state, the processor determining pre-coding coefficients for the data packets, and in a third high rate transmission state, the processor providing pre-coded data packets to the transmitter for transmission, wherein the processor transitions from the third state to the first state upon receiving a reduced quality measure from the remote station.

摘要翻译： 使用多个发射波束获得增强的无线速度。 在一个示例中，发射机通过使用多个空间波束和多个模拟转换器的天线阵列发送数据分组。 接收机从远程站接收反馈，反馈包括从发射机接收的数据分组的质量测量。 一种处理器，用于使用所述反馈来控制所述发射机的传输参数，所述处理器在第一信道分析状态下具有多个状态，所述处理器以第二波束搜索和训练状态确定所述天线阵列的波束形成向量， 所述处理器确定所述数据分组的预编码系数，并且在第三高速率传输状态中，所述处理器向所述发射机提供预编码的数据分组以进行传输，其中所述处理器在接收到所述第一状态时从所述第三状态转换到所述第一状态 从远程站降低质量测量。