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1. 发明授权

US07161534B2 Hybrid beamforming apparatus and method for the same 有权
标题翻译：混合波束成形装置及其方法
公开(公告)号：US07161534B2
公开(公告)日：2007-01-09
申请号：US10939480
申请日：2004-09-14
申请人： Jiann-An Tsai , Wei Ping Chuang , Chun-Chun Kuo , Yung-Yih Jian
发明人： Jiann-An Tsai , Wei Ping Chuang , Chun-Chun Kuo , Yung-Yih Jian
IPC分类号： H01Q3/00 , G01S3/16
CPC分类号： H01Q3/2605 , G01S3/16
摘要： A hybrid beamforming apparatus and method are proposed for a communication system. The hybrid beamforming apparatus includes a plurality of antennas, a plurality of FFT, a plurality of hybrid weight-coefficient generators and a plurality of adders. In each of the hybrid weight-coefficient generators, the weight coefficient for each subcarrier is calculated by a time-domain correlation matrix and a cross-correlation vector, which is calculated by a frequency domain signal and a training signal. The hybrid beamforming apparatus and method according to the present invention can enhance immunity for multipath effect with lower system complexity.
摘要翻译：提出了一种用于通信系统的混合波束成形装置和方法。混合波束形成装置包括多个天线，多个FFT，多个混合权重系数发生器和多个加法器。在每个混合权重系数发生器中，通过由频域信号和训练信号计算的时域相关矩阵和互相关矢量来计算每个子载波的权重系数。根据本发明的混合波束形成装置和方法可以增强具有较低系统复杂度的多径效应的免疫力。

2. 发明授权

US08625693B2 Techniques for transformation codebook antenna beamforming in OFDM wireless communication system 有权
标题翻译： OFDM无线通信系统中变换码本天线波束成形技术
公开(公告)号：US08625693B2
公开(公告)日：2014-01-07
申请号：US12912080
申请日：2010-10-26
申请人： Jiann-An Tsai , Zhouyue Pi , Sudhir Ramakrishna
发明人： Jiann-An Tsai , Zhouyue Pi , Sudhir Ramakrishna
IPC分类号： H04B7/02 , H04L27/00 , H04M11/00
CPC分类号： H04B7/0617 , H04B7/0626 , H04L25/0204 , H04L25/03343 , H04L2025/03808
摘要： Methods for a transmitter station and a receiver station to perform beamforming in a wireless communication system, and a transmitter station and a receiver station to perform the corresponding method, are provided. The method for the transmitter station to perform beamforming in the wireless communication system includes estimating and tracking a long-term averaged and normalized channel correlation matrix between the transmitter station and a receiver station, determining beamforming coefficients based on the tracked long-term averaged and normalized channel correlation matrix, and communicating with the receiver station using the determined beamforming coefficients, wherein the receiver station also estimates and tracks the long term averaged and normalized channel correlation matrix, and determines beamforming coefficients based on the tracked long-term averaged and normalized channel correlation matrix.
摘要翻译：发送站和接收站在无线通信系统中执行波束成形的方法以及发送站和接收站来执行相应的方法。发射机站在无线通信系统中执行波束成形的方法包括估计和跟踪发射机站和接收机站之间的长期平均和归一化的信道相关矩阵，基于被跟踪的长期平均和归一化的波长成形系数信道相关矩阵，并且使用所确定的波束形成系数与接收机站进行通信，其中接收机站还估计和跟踪长期平均和归一化的信道相关矩阵，并且基于跟踪的长期平均和归一化信道相关性来确定波束成形系数矩阵。

3. 发明授权

US08265189B2 Multiple antennas transmit diversity scheme 有权
公开(公告)号：US08265189B2
公开(公告)日：2012-09-11
申请号：US13436273
申请日：2012-03-30
申请人： Farooq Khan , Jianzhong Zhang , Jiann-An Tsai
发明人： Farooq Khan , Jianzhong Zhang , Jiann-An Tsai
IPC分类号： H04B7/02
CPC分类号： H04L1/04 , H04B7/0669 , H04B7/068 , H04J13/00 , H04L1/0606 , H04L1/0625 , H04L1/0668 , H04L1/08 , H04L27/2608
摘要： A method from transmitting data via multiple antennas. The method contemplates modulating data to be transmitted into a plurality of modulated symbols, encoding each pair of modulated symbols from among said plurality of symbols in accordance with a transmission diversity scheme to result in a plurality of 2 by 2 matrices, with each 2 by 2 matrix corresponding to each pair of modulated symbols, orthogonally spreading the plurality of 2 by 2 matrices to generate an output matrix, and transmitting the symbols in the output matrix via a plurality of antennas by using either a space time transmission diversity scheme, a space frequency transmission diversity scheme, or a combination of a space time transmission diversity scheme and a space frequency transmission diversity scheme.

4. 发明授权

US07400614B2 Methods and apparatus for downlink diversity in CDMA using Walsh codes 有权
标题翻译：使用Walsh码的CDMA下行链路分集的方法和装置
公开(公告)号：US07400614B2
公开(公告)日：2008-07-15
申请号：US10282455
申请日：2002-10-29
申请人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
发明人： R. Michael Buehrer , Robert Atmaram Soni , Jiann-An Tsai
IPC分类号： H04B7/216 , H04J11/00 , H04J13/00 , H04B1/02 , H04B1/66
CPC分类号： H04B1/7103 , H04B1/707 , H04B7/0613 , H04B2201/709709 , H04J13/0048 , H04J13/0077 , H04J13/18 , H04L1/06 , H04L1/0618
摘要： Downlink diversity in a CDMA system is provided by employing Walsh codes in conjunction with M transmit antennas at a common base station serving K mobiles, where M may or may not be to equal to K. The present invention provides methods and apparatus for improving downlink diversity in a CDMA system. Each transmit antenna transmits a signal representing the result of the modulation of Walsh codes by data signals for each of the K mobiles, assuming there is data pertaining to a particular mobile. The assignment of Walsh codes is accomplished in accordance with a transmission matrix T. The transmission matrix maps the user data symbols onto the Walsh codes for each antenna and is preferably designed such that its columns are representative of the transmit antennas and orthogonal. Thus, at a given mobile, the mobile need only correlate with M different Walsh codes since each transmit signal received contains a component that is the result of M different Walsh codes having been modulated by a data signal associated with that particular mobile. The set of Walsh codes to select from includes 2┌log2(K)┐ Walsh codes. However, with respect to any given mobile, there is needed only as many different Walsh codes as there are transmit antennas serving the particular mobile. The results of the respective M correlations are combined and, with obtained channel estimates, the receiver estimates the particular data pertaining to that particular mobile so that it can be provided to the user. Also, the present invention provides for various ways to estimate the respective channels between the M transmit antennas and a mobile. It is to be appreciated that the downlink diversity techniques of the invention may be applied to the physical layer proposed in the IS95-C physical layer draft proposal.
摘要翻译： CDMA系统中的下行链路分集通过在服务于K个移动台的公共基站处与M个发射天线结合使用Walsh码来提供，其中M可以或可以不等于K.本发明提供了用于改善下行链路分集的方法和装置在CDMA系统中。假设存在与特定移动站有关的数据，每个发送天线通过用于K个移动台中的每一个的数据信号来发送表示沃尔什码的调制结果的信号。沃尔什码的分配根据传输矩阵T完成。传输矩阵将用户数据符号映射到每个天线的沃尔什码上，并且优选地被设计为使得其列表示发射天线并且是正交的。因此，在给定的移动站处，移动站仅需要与M个不同的沃尔什码相关，因为所接收的每个发送信号包含一个分量，该分量是由与该特定移动站相关联的数据信号调制的M个不同沃尔什码的结果。选择的沃尔什码集合包括沃尔什码（2）<2> （K）┐ Walsh码。然而，对于任何给定的移动站，仅需要与为特定移动站服务的发射天线一样多的不同沃尔什码。各个M相关的结果被组合，并且利用所获得的信道估计，接收机估计与该特定移动台有关的特定数据，以便可以向用户提供。此外，本发明提供了估计M个发射天线和移动台之间的相应信道的各种方式。应当理解，本发明的下行链路分集技术可以应用于IS95-C物理层草案提案中提出的物理层。

5. 发明申请

US20080080637A1 System and method for performing precoding in a wireless communication system 有权
标题翻译：用于在无线通信系统中执行预编码的系统和方法
公开(公告)号：US20080080637A1
公开(公告)日：2008-04-03
申请号：US11824832
申请日：2007-07-03
申请人： Farooq Khan , Jiann-An Tsai , Cornelius van Rensburg , Yinong Ding
发明人： Farooq Khan , Jiann-An Tsai , Cornelius van Rensburg , Yinong Ding
IPC分类号： H04L27/28 , H04B7/02 , H04L1/02 , H04M1/00 , H04L27/20
CPC分类号： H04B7/0697 , H04B7/0617 , H04B7/0639 , H04W52/42
摘要： A base station capable of performing precoding in a wireless communication system is provided. The base station includes a plurality of codebooks and a codebook selector. Each codebook comprises a plurality of composite precoding matrices that are generated based on a corresponding diversity precoding matrix. The codebook selector is operable to select one of the codebooks for use in a communication session with a subscriber station.
摘要翻译：提供一种能够在无线通信系统中执行预编码的基站。基站包括多个码本和码本选择器。每个码本包括基于相应的分集预编码矩阵生成的多个复合预编码矩阵。码本选择器可操作以选择用于与用户站的通信会话中的一个码本。

6. 发明申请

US20070218942A1 Apparatus and method for selecting modulation and filter roll-off to meet power and bandwidth requirements 有权
标题翻译：选择调制和滤波器滚降以满足功率和带宽要求的装置和方法
公开(公告)号：US20070218942A1
公开(公告)日：2007-09-20
申请号：US11699305
申请日：2007-01-29
申请人： Farooq Khan , Jiann-An Tsai
发明人： Farooq Khan , Jiann-An Tsai
IPC分类号： H04M1/00
CPC分类号： H04L27/2614 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L5/0007 , H04L5/0046 , H04L5/0058 , H04L25/03834 , H04L27/2626
摘要： A base station for use in a wireless network that communicates according to a multi-carrier protocol. The base station receives an uplink signal transmitted by a first subscriber station. The first subscriber station transmits using a configurable spectral shaping filter and a selectable modulation order. The base station determines a required bandwidth efficiency associated with the first subscriber station and, in response to the determination, selects a first modulation order and a first filter parameter to be used by the first subscriber station. Advantageously, the base station selects the first modulation order and the first filter parameter in order to maximize a power efficiency of the first subscriber station while maintaining the required bandwidth efficiency.
摘要翻译：一种在根据多载波协议进行通信的无线网络中使用的基站。基站接收由第一用户台发送的上行链路信号。第一用户台使用可配置的频谱整形滤波器和可选择的调制顺序进行发送。基站确定与第一用户站相关联的所需带宽效率，并且响应于该确定，选择要由第一用户台使用的第一调制阶和第一滤波器参数。有利地，基站选择第一调制阶和第一滤波器参数，以便在保持所需带宽效率的同时最大化第一用户台的功率效率。

7. 发明申请

US20070183380A1 Method and System for Scheduling Users Based on User-Determined Ranks In A MIMO System 有权
标题翻译：基于MIMO系统中用户确定等级的用户调度方法和系统
公开(公告)号：US20070183380A1
公开(公告)日：2007-08-09
申请号：US11620401
申请日：2007-01-05
申请人： Cornelius van Rensburg , Yinong Ding , Farooq Khan , Jiann-An Tsai
发明人： Cornelius van Rensburg , Yinong Ding , Farooq Khan , Jiann-An Tsai
IPC分类号： H04Q7/24
CPC分类号： H04L1/1893 , H04B7/0452 , H04B7/0602 , H04B7/0691 , H04L1/0025 , H04L1/0026 , H04L1/06 , H04L1/1816 , H04L1/1835
摘要： In a wireless network comprising a plurality of subscriber stations and a base station capable of providing service to the subscriber stations, a subscriber station is provided that includes a rank selector and a scheduling data reporter. The rank selector is operable to select a rank for the subscriber station. The rank is operable to identify a number of antennas for transmitting data streams from the base station to the subscriber station. The scheduling data reporter is operable to report scheduling data, including the rank, to the base station.
摘要翻译：在包括多个用户站和能够向订户站提供服务的基站的无线网络中，提供了包括秩选择器和调度数据报告者的用户站。等级选择器可操作以选择用户台的等级。该等级可操作地识别用于从基站向用户站发送数据流的多个天线。调度数据报告器可操作以向基站报告包括秩的调度数据。

8. 发明申请

US20070104149A1 Method and system for providing adaptive modulation and coding in a multi-carrier wireless network 有权
标题翻译：用于在多载波无线网络中提供自适应调制和编码的方法和系统
公开(公告)号：US20070104149A1
公开(公告)日：2007-05-10
申请号：US11504452
申请日：2006-08-15
申请人： Farooq Khan , Jiann-An Tsai , Cornelius Rensburg
发明人： Farooq Khan , Jiann-An Tsai , Cornelius Rensburg
IPC分类号： H04Q7/00
CPC分类号： H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L27/2608 , H04W28/18
摘要： A method of providing adaptive modulation and coding in a multi-carrier wireless network that includes a plurality of subscriber stations is provided. The method includes, for each of the subscriber stations, selecting a type of modulation and a coding rate based on a signal-to-interference-plus-noise ratio (SINR) variance.
摘要翻译：提供了一种在包括多个用户站的多载波无线网络中提供自适应调制和编码的方法。该方法包括对于每个用户站，基于信号与干扰加噪声比（SINR）方差来选择调制类型和编码率。

9. 发明申请

US20050277444A1 Apparatus and method for downlink spatial division multiple access scheduling in a wireless network 失效
标题翻译：用于无线网络中的下行链路空分多址调度的装置和方法
公开(公告)号：US20050277444A1
公开(公告)日：2005-12-15
申请号：US11128772
申请日：2005-05-13
申请人： Cornelius Rensburg , Jiann-An Tsai , Lai Tee
发明人： Cornelius Rensburg , Jiann-An Tsai , Lai Tee
IPC分类号： H04M1/00 , H04W16/28 , H04W72/12 , H04W88/08
CPC分类号： H04W72/1273 , H04B7/0617 , H04W52/346 , H04W72/046 , H04W72/1247
摘要： A base station for communicating with mobile stations in a coverage area of the wireless network. The base station comprises: 1) a transceiver for transmitting downlink OFDMA signals to each mobile station; 2) an antenna array for transmitting the downlink OFDMA signals to the mobile stations using spatially directed beams; and 3) an SDMA scheduling controller for scheduling downlink transmissions to the mobile stations. The SDMA scheduling controller determines a first mobile station having a highest priority and schedules the first mobile station for downlink transmission in a particular time-frequency slot. The SDMA scheduling controller then determines additional mobile stations that are spatially uncorrelated with the first mobile station, as well as each other, and schedules the additional mobile stations for downlink transmission in that particular time-frequency slot according to priority.
摘要翻译：用于与无线网络的覆盖区域中的移动台进行通信的基站。该基站包括：1）用于向每个移动台发送下行OFDMA信号的收发信机; 2）天线阵列，用于使用空间定向波束将下行链路OFDMA信号发射到移动台; 以及3）用于调度到移动站的下行链路传输的SDMA调度控制器。 SDMA调度控制器确定具有最高优先级的第一移动台，并且在特定的时隙中调度第一移动台进行下行链路传输。然后，SDMA调度控制器确定与第一移动站空间上不相关的另外的移动站，以及彼此之间，并根据优先级调度附加的移动站用于该特定时隙中的下行链路传输。

10. 发明申请

US20050265224A1 Apparatus for generating 2D spreading code and method for the same 有权
标题翻译：用于生成2D扩展码的装置及其方法
公开(公告)号：US20050265224A1
公开(公告)日：2005-12-01
申请号：US10995466
申请日：2004-11-24
申请人： Shih-Kai Lee , Po-Lin Chiu , Chang-Lung Hsiao , Jiann-An Tsai
发明人： Shih-Kai Lee , Po-Lin Chiu , Chang-Lung Hsiao , Jiann-An Tsai
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713 , H04J11/00
CPC分类号： H04J13/12 , H04J13/0044
摘要： An apparatus for generating a 2D spreading code and method for the same are proposed. The apparatus for generating the 2D spreading code includes a column counter, a row counter, a codeword selector, and a logic unit. The logic unit performs logic operations on the output of the column counter, the row counter, and the codeword selector to generate the 2D spreading code of desired order designated by the codeword selector. The 2D spreading code includes 4 2×2 initial matrixes for generating 4i codes for 4i users in the ith order. The apparatus for generating the 2D spreading code according to the present invention is advantageously used in OFDM system to increase the number of subscribers with reduced interference.
摘要翻译：提出了一种用于生成2D扩展码的装置及其方法。用于生成2D扩展码的装置包括列计数器，行计数器，码字选择器和逻辑单元。逻辑单元对列计数器，行计数器和码字选择器的输出执行逻辑运算，以产生由码字选择器指定的期望顺序的2D扩展码。 2D扩展码包括4×2×2个初始矩阵，用于按照第i个顺序为4位用户生成4位代码。根据本发明的用于生成2D扩展码的装置在OFDM系统中有利地用于增加具有减小的干扰的用户数量。

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