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1. 发明申请

US20130057432A1 METHOD AND APPARATUS FOR BEAM BROADENING FOR PHASED ANTENNA ARRAYS USING MULTI-BEAM SUB-ARRAYS 审中-公开
标题翻译：使用多束子阵列的波束天线阵列的波束扩展方法和装置
公开(公告)号：US20130057432A1
公开(公告)日：2013-03-07
申请号：US13558208
申请日：2012-07-25
申请人： Sridhar Rajagopal , Kaushik Josiam , Zhouyue Pi
发明人： Sridhar Rajagopal , Kaushik Josiam , Zhouyue Pi
IPC分类号： H01Q3/24
CPC分类号： H01Q3/26 , H01Q25/002
摘要： A transmitter or receiver may use beamforming methods for transmitting or receiving a signal in a communication system. The method for transmitting includes determining a first beamforming weight associated with a total number of antennas in an antenna array. The method also includes transmitting a first signal in a first beam having a first beam width using the total number of antennas by applying the first predetermined beamforming weight. The method further includes determining a second beamforming weight associated with a first sub-array of antennas in the antenna array and determining a third beamforming weight associated with a second sub-array of antennas in the antenna array. The method still further includes transmitting a second signal in a second beam having a second beam width using the first sub-array of antennas by applying the second beamforming weight and the second sub-array of antennas by applying the third beamforming weight.
摘要翻译：发射机或接收机可以使用波束成形方法在通信系统中发送或接收信号。用于发送的方法包括确定与天线阵列中的天线总数相关联的第一波束成形权重。该方法还包括通过应用第一预定波束形成权重，使用总天线数量在具有第一波束宽度的第一波束中发送第一信号。该方法还包括确定与天线阵列中的天线的第一子阵列相关联的第二波束成形权重，并且确定与天线阵列中的天线的第二子阵列相关联的第三波束成形权重。该方法还包括：通过应用第三波束形成权重应用第二波束形成权重和第二子阵列天线，使用第一天线子阵列在具有第二波束宽度的第二波束中发送第二信号。

2. 发明申请

US20100272193A1 DATA COMMUNICATION USING 2D BAR CODES 有权
标题翻译：使用2D BAR代码的数据通信
公开(公告)号：US20100272193A1
公开(公告)日：2010-10-28
申请号：US12561015
申请日：2009-09-16
申请人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
发明人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
IPC分类号： H04L27/00
CPC分类号： H04L1/0075 , H04L1/0041 , H04L1/1812
摘要： A Two-Dimensional (2D) code receiver and transmitter, and methods for their operation in a 2D code communication system, are provided. The method for operating the 2D code receiver includes receiving a sequence of 2D codes from a 2D code transmitter having data encoded therein, wherein the 2D codes of the sequence are received in succession, and decoding the received a sequence of 2D codes into the data.
摘要翻译：提供二维（2D）码接收机和发射机及其在二维码通信系统中的操作方法。用于操作2D代码接收器的方法包括从具有其中编码的数据的2D代码发送器接收2D代码序列，其中序列的2D代码被连续地接收，并且将接收的2D代码序列解码为数据。

3. 发明申请

US20130028341A1 COMBINING BASEBAND PROCESSING AND RADIO FREQUENCY BEAM STEERING IN WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：无线通信系统中组合基带处理和无线电频率波束转向
公开(公告)号：US20130028341A1
公开(公告)日：2013-01-31
申请号：US13552565
申请日：2012-07-18
申请人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
发明人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
IPC分类号： H04B7/02
CPC分类号： H04B7/0478 , H04B7/0456 , H04B7/0465 , H04B7/0617 , H04B7/0626 , H04B7/0632 , H04B7/0639 , H04B7/065 , H04B7/0695 , H04B7/088 , H04L25/0224
摘要： A method and apparatus enable combined baseband (BB) and radio frequency (RF) processing of signals. The method includes receiving, by a receiver, channel estimation information for a channel between a transmitter and the receiver. The method includes identifying a plurality of paths in the channel based on the channel estimation information. The method includes calculating an RF precoding matrix for precoding one or more signals to be transmitted on each of the identified paths. The RF precoding matrix includes a phase shift for each of the identified paths. Additionally, the method includes calculating a BB precoding matrix for precoding the one or more signals by a BB precoding unit associated with the transmitter.
摘要翻译：一种方法和装置使能信号的组合基带（BB）和射频（RF）处理。该方法包括由接收机接收用于发射机和接收机之间的信道的信道估计信息。该方法包括基于信道估计信息识别信道中的多个路径。该方法包括计算一个RF预编码矩阵，用于对每个所识别的路径上要发送的一个或多个信号进行预编码。 RF预编码矩阵包括针对每个所识别的路径的相移。此外，该方法包括：计算BB预编码矩阵，用于通过与发射机相关联的BB预编码单元对一个或多个信号进行预编码。

4. 发明授权

US09270420B2 Data communication using 2D bar codes 有权
标题翻译：使用2D条形码进行数据通信
公开(公告)号：US09270420B2
公开(公告)日：2016-02-23
申请号：US12561015
申请日：2009-09-16
申请人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
发明人： Farooq Khan , Jiann-An Tsai , Sridhar Rajagopal , Bill Semper , Zhouyue Pi , Ying Li
IPC分类号： H04L7/00 , H03K9/00 , H04L1/00 , H04L1/18
CPC分类号： H04L1/0075 , H04L1/0041 , H04L1/1812
摘要： A Two-Dimensional (2D) code receiver and transmitter, and methods for their operation in a 2D code communication system, are provided. The method for operating the 2D code receiver includes receiving a sequence of 2D codes from a 2D code transmitter having data encoded therein, wherein the 2D codes of the sequence are received in succession, and decoding the received a sequence of 2D codes into the data.
摘要翻译：提供二维（2D）码接收机和发射机及其在二维码通信系统中的操作方法。用于操作2D代码接收器的方法包括从具有其中编码的数据的2D代码发送器接收2D代码序列，其中序列的2D代码被连续地接收，并且将接收的2D代码序列解码为数据。

5. 发明授权

US09143211B2 Multiple antenna transmission with per-antenna power constraints 有权
标题翻译：具有每天线功率限制的多天线传输
公开(公告)号：US09143211B2
公开(公告)日：2015-09-22
申请号：US13595811
申请日：2012-08-27
申请人： Zhouyue Pi , Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra
发明人： Zhouyue Pi , Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06 , H04B7/08 , H04W52/22 , H04W52/30 , H04W52/42 , H04L27/26
CPC分类号： H04B7/0465 , H04B7/02 , H04B7/0426 , H04B7/043 , H04B7/0617 , H04B7/0897 , H04L27/2626 , H04W52/225 , H04W52/30 , H04W52/42
摘要： A method, apparatus, and system to transmit signals using multiple antennas with per-antenna power constraints. The method includes initializing a precoding algorithm to a complex matrix. The precoding algorithm is for precoding signals transmitted by a plurality of antennas. The method includes iteratively processing the precoding algorithm on a per-antenna basis by, at each iteration, sequentially updating a precoder for each of the plurality of antennas. The method includes, after each iteration, determining whether the precoding algorithm has converged based on a change in a rate of mutual information across iterations. Additionally, the method includes, in response to determining that the precoding algorithm has converged, transmitting the signals using the precoding algorithm.
摘要翻译：一种使用具有每天线功率约束的多个天线发射信号的方法，装置和系统。该方法包括将预编码算法初始化为复数矩阵。预编码算法用于预编码由多个天线发送的信号。该方法包括在每个天线的基础上迭代地处理预编码算法，在每个迭代中，顺序地更新多个天线中的每个天线的预编码器。该方法包括在每次迭代之后，基于跨越迭代的互信息速率的变化来确定预编码算法是否已经收敛。此外，该方法包括响应于确定预编码算法已经收敛，使用预编码算法发送信号。

6. 发明授权

US08929473B2 Combining baseband processing and radio frequency beam steering in wireless communication systems 有权
标题翻译：在无线通信系统中组合基带处理和射频波束导向
公开(公告)号：US08929473B2
公开(公告)日：2015-01-06
申请号：US13552565
申请日：2012-07-18
申请人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
发明人： Omar El Ayach , Sridhar Rajagopal , Shadi Abu-Surra , Zhouyue Pi
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06 , H04L25/02
CPC分类号： H04B7/0478 , H04B7/0456 , H04B7/0465 , H04B7/0617 , H04B7/0626 , H04B7/0632 , H04B7/0639 , H04B7/065 , H04B7/0695 , H04B7/088 , H04L25/0224
摘要： A method and apparatus enable combined baseband (BB) and radio frequency (RF) processing of signals. The method includes receiving, by a receiver, channel estimation information for a channel between a transmitter and the receiver. The method includes identifying a plurality of paths in the channel based on the channel estimation information. The method includes calculating an RF precoding matrix for precoding one or more signals to be transmitted on each of the identified paths. The RF precoding matrix includes a phase shift for each of the identified paths. Additionally, the method includes calculating a BB precoding matrix for precoding the one or more signals by a BB precoding unit associated with the transmitter.
摘要翻译：一种方法和装置使能信号的组合基带（BB）和射频（RF）处理。该方法包括由接收机接收用于发射机和接收机之间的信道的信道估计信息。该方法包括基于信道估计信息识别信道中的多个路径。该方法包括计算一个RF预编码矩阵，用于对每个所识别的路径上要发送的一个或多个信号进行预编码。 RF预编码矩阵包括针对每个所识别的路径的相移。此外，该方法包括：计算BB预编码矩阵，用于通过与发射机相关联的BB预编码单元对一个或多个信号进行预编码。

7. 发明申请

US20130051486A1 MULTIPLE ANTENNA TRANSMISSION WITH PER-ANTENNA POWER CONSTRAINTS 有权
标题翻译：具有天线功率约束的多天线传输
公开(公告)号：US20130051486A1
公开(公告)日：2013-02-28
申请号：US13595811
申请日：2012-08-27
申请人： Zhouyue Pi , Omar EI Ayach , Sridhar Rajagopal , Shadi Abu-Surra
发明人： Zhouyue Pi , Omar EI Ayach , Sridhar Rajagopal , Shadi Abu-Surra
IPC分类号： H04B7/02 , H04L27/00
CPC分类号： H04B7/0465 , H04B7/02 , H04B7/0426 , H04B7/043 , H04B7/0617 , H04B7/0897 , H04L27/2626 , H04W52/225 , H04W52/30 , H04W52/42
摘要： A method, apparatus, and system to transmit signals using multiple antennas with per-antenna power constraints. The method includes initializing a precoding algorithm to a complex matrix. The precoding algorithm is for precoding signals transmitted by a plurality of antennas. The method includes iteratively processing the precoding algorithm on a per-antenna basis by, at each iteration, sequentially updating a precoder for each of the plurality of antennas. The method includes, after each iteration, determining whether the precoding algorithm has converged based on a change in a rate of mutual information across iterations. Additionally, the method includes, in response to determining that the precoding algorithm has converged, transmitting the signals using the precoding algorithm.
摘要翻译：一种使用具有每天线功率约束的多个天线发射信号的方法，装置和系统。该方法包括将预编码算法初始化为复数矩阵。预编码算法用于预编码由多个天线发送的信号。该方法包括在每个天线的基础上迭代地处理预编码算法，在每个迭代中，顺序地更新多个天线中的每个天线的预编码器。该方法包括在每次迭代之后，基于跨越迭代的互信息速率的变化来确定预编码算法是否已经收敛。此外，该方法包括响应于确定预编码算法已经收敛，使用预编码算法发送信号。

8. 发明授权

US08855496B2 Optical clock rate negotiation for supporting asymmetric clock rates for visible light communication 有权
标题翻译：用于支持可见光通信的非对称时钟速率的光时钟速率协商
公开(公告)号：US08855496B2
公开(公告)日：2014-10-07
申请号：US12975225
申请日：2010-12-21
申请人： Sridhar Rajagopal , Eran Pisek , Farooq Khan , Ying Li
发明人： Sridhar Rajagopal , Eran Pisek , Farooq Khan , Ying Li
IPC分类号： H04B10/00 , H04B10/114 , H04B10/116
CPC分类号： H04B10/116 , H04B10/1149
摘要： A method and apparatus conduct an optical clock rate negotiation to support asymmetric clock rates for visible light communication (VLC) in a VLC device. A first frame that includes a receiver clock rate supported by a first VLC device is transmitted at a predetermined clock rate. A response frame that includes a receiver clock rate supported by a second VLC device is received from the second VLC device. A transmission clock rate of the first VLC device is selected based on the response frame from the second VLC device. Subsequent frames for data communication are transmitted to the second VLC device at the selected transmission clock rate of the first device. Alternatively, when conducting optical clock negotiation in the PHY layer, multiple clock rates are supported within a single frame.
摘要翻译：一种方法和装置进行光时钟速率协商以支持VLC设备中可见光通信（VLC）的非对称时钟速率。以预定的时钟速率发送包括由第一VLC设备支持的接收机时钟速率的第一帧。从第二VLC设备接收包括由第二VLC设备支持的接收机时钟速率的响应帧。基于来自第二VLC设备的响应帧来选择第一VLC设备的传输时钟速率。用于数据通信的后续帧以所选择的第一设备的传输时钟速率发送到第二VLC设备。或者，当在PHY层中进行光时钟协商时，在单个帧内支持多个时钟速率。

9. 发明授权

US08731406B2 Apparatus and method for generating high resolution frames for dimming and visibility support in visible light communication 有权
标题翻译：用于在可见光通信中产生用于调光和可见度支持的高分辨率帧的装置和方法
公开(公告)号：US08731406B2
公开(公告)日：2014-05-20
申请号：US12767678
申请日：2010-04-26
申请人： Sridhar Rajagopal , Farooq Khan
发明人： Sridhar Rajagopal , Farooq Khan
IPC分类号： H04B10/00 , G09G5/10
CPC分类号： H04B10/1149 , H04B10/116
摘要： For use in a visible light communication (VLC) network, a method for generating high resolution visibility frames for visibility or dimming support. The method includes determining a required visibility for the high resolution frames. The method also includes generating a pattern that meets the determined required visibility, the pattern having a first quantity of first low resolution frames and a second quantity of second low resolution frames. The method further includes transmitting the pattern to achieve the required high resolution frames.
摘要翻译：为了在可见光通信（VLC）网络中使用，用于产生用于可见度或调光支持的高分辨率可见性帧的方法。该方法包括确定高分辨率帧所需的可视性。该方法还包括产生满足所确定的所需可见度的图案，该图案具有第一数量的第一低分辨率帧和第二数量的第二低分辨率帧。该方法还包括发送图案以实现所需的高分辨率帧。

10. 发明授权

US08457560B2 Apparatus and method for interference minimization in body area networks using low duty cycle and preamble design 失效
标题翻译：使用低占空比和前导码设计的体区网络中的干扰最小化的装置和方法
公开(公告)号：US08457560B2
公开(公告)日：2013-06-04
申请号：US12689156
申请日：2010-01-18
申请人： Sridhar Rajagopal , Kiran Bynam , Jianzhong Zhang
发明人： Sridhar Rajagopal , Kiran Bynam , Jianzhong Zhang
IPC分类号： H04B1/00
CPC分类号： H04W52/287 , H04W52/243 , H04W76/28 , H04W84/18
摘要： A device is adapted for use in a body area network capable of low power communications wherein a number of piconets can operate within close proximity. The device is configured to couple to a plurality of secondary devices in a piconet. The device uses an interference mitigation technique to enable the devices in the piconet to use the same frequency and same time as a number of adjacent piconets located in close proximity to the piconet. The interference mitigation technique is at least one of a low duty cycling operation; and a preamble sequence designed to operate under interference.
摘要翻译：一种设备适用于能够进行低功率通信的身体区域网络，其中多个微微网可在紧邻内操作。该设备被配置为耦合到微微网中的多个辅助设备。该设备使用干扰减轻技术来使得微微网中的设备能够使用与位于微微网附近的多个相邻微微网相同的频率和相同的时间。干扰减轻技术是低功率循环操作中的至少一种; 以及设计为在干扰下操作的前导码序列。

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