QUERY PROCESSING SYSTEM AND METHOD FOR DATABASE WITH ENCRYPTED COLUMN BY QUERY ENCRYPTION TRANSFORMATION
    11.
    发明申请
    QUERY PROCESSING SYSTEM AND METHOD FOR DATABASE WITH ENCRYPTED COLUMN BY QUERY ENCRYPTION TRANSFORMATION 有权
    通过查询加密转换的加密列的查询处理系统和数据库的方法

    公开(公告)号:US20090100033A1

    公开(公告)日:2009-04-16

    申请号:US12251874

    申请日:2008-10-15

    IPC分类号: G06F7/06 G06F17/30

    CPC分类号: G06F21/6227

    摘要: Query processing system and method by query transformation transform a user request query based on an original DB structure, destined to a DBMS of a DB with some columns encrypted, into a query based on an encrypted DB structure so that the DBMS processes the query. The query is processed irrespective of whether or not the query includes an encryption-related item, and query-processing performance is remarkably improved.

    摘要翻译: 通过查询转换的查询处理系统和方法将基于原始数据库结构的用户请求查询转换为基于加密DB结构的查询中的目标数据库,其中DBMS具有加密的一些列,以便DBMS处理查询。 无论查询是否包含加密相关项,查询都被处理,查询处理性能显着提高。

    Method for transmitting precoded signal in collaborative multiple-input multiple-output communication system
    12.
    发明授权
    Method for transmitting precoded signal in collaborative multiple-input multiple-output communication system 有权
    在协同多输入多输出通信系统中发送预编码信号的方法

    公开(公告)号:US08755451B2

    公开(公告)日:2014-06-17

    申请号:US12811175

    申请日:2008-12-30

    IPC分类号: H04B7/02

    摘要: A method for transmitting a precoded signal in a collaborative multiple-input multiple-output (MIMO) communication system is described. A method for receiving a precoded signal in a MIMO communication system includes estimating, by a mobile station, channels for one or more base stations through signals received from the one or more base stations including a serving base station, transmitting precoding matrix indexes of the one or more base stations determined based on the estimated channels to the serving base station, and receiving signals precoded by the one or more base stations based on the precoding matrix index.

    摘要翻译: 描述了在协作多输入多输出(MIMO)通信系统中发送预编码信号的方法。 一种用于在MIMO通信系统中接收预编码信号的方法包括:通过移动台通过从包括服务基站的一个或多个基站接收的信号估计一个或多个基站的信道,发送一个或多个基站的预编码矩阵索引 或更多的基站,基于所估计的信道确定到服务基站,以及接收基于预编码矩阵索引由一个或多个基站预编码的信号。

    Phase shift based precoding method and transceiver for supporting the same
    14.
    发明授权
    Phase shift based precoding method and transceiver for supporting the same 有权
    基于相移的预编码方法和收发器支持相同

    公开(公告)号:US08331464B2

    公开(公告)日:2012-12-11

    申请号:US11754882

    申请日:2007-05-29

    IPC分类号: H04K1/10

    摘要: A method of transmitting data using a generalized phase shift based proceding or an extended phase shift precoding scheme in a multiple-antenna system using a plurality of subcarrier and a transceiver for supporting the same are disclosed. A phase shift based precoding matrix may be generalized and determined by a product of a diagonal matrix for phase shift and a unitary matrix for maintaining orthogonality in spatial domain. The diagonal matrix may be extended by a product of a proceding matrix for increasing channel power and the diagonal matrix for phase shift. The design of the transceiver can be simplified or communication efficiency can be improved by generalizing and extending the phase shift based proceding.

    摘要翻译: 公开了一种在多天线系统中使用基于广义相移的过程或扩展相移预编码方案来发送数据的方法,所述多天线系统使用多个子载波和收发器来支持该方法。 基于相移的预编码矩阵可以被推广并由用于相移的对角矩阵和用于维持空间域中的正交性的酉矩阵的乘积来确定。 可以通过用于增加信道功率的过程矩阵的乘积和用于相移的对角矩阵来扩展对角矩阵。 可以简化收发器的设计,通过泛化和扩展基于相移的过程可以提高通信效率。

    REPETITIVE TRANSMISSIONS IN MULTI-CARRIER BASED WIRELESS ACCESS TECHNIQUES
    15.
    发明申请
    REPETITIVE TRANSMISSIONS IN MULTI-CARRIER BASED WIRELESS ACCESS TECHNIQUES 有权
    基于多载波无线接入技术的重复传输

    公开(公告)号:US20120216092A1

    公开(公告)日:2012-08-23

    申请号:US13401831

    申请日:2012-02-21

    IPC分类号: H04L1/18 G06F11/14

    摘要: According to one embodiment, a method for repetitive transmission using a plurality of sub-carriers includes: preparing a symbol to be transmitted using the plurality of sub-carriers within a single time domain unit; repeating the symbol a predetermined number (N) of times; applying a corresponding one of N different cyclic shift values to each of the N repeated symbols to be transmitted using the plurality of sub-carriers within the single time domain unit; performing an IFFT (Inverse Fast Fourier Transform) on each of the N repeated symbols to which the corresponding one of the N different cyclic shift values is applied; and transmitting the N repeated symbols on which the IFFT is performed using the plurality of sub-carriers.

    摘要翻译: 根据一个实施例,使用多个子载波的重复传输方法包括:在单个时域单元内准备要使用多个子载波进行传输的符号; 重复该符号预定次数(N)次; 对所述N个重复符号中的每一个应用N个不同循环移位值中的相应一个,使用所述单个时域单元内的所述多个子载波进行发送; 对应用N个不同循环移位值中的相应一个的N个重复符号中的每一个执行IFFT(快速傅里叶逆变换) 以及使用所述多个子载波来发送在其上执行所述IFFT的所述N个重复符号。

    Query processing system and method for database with encrypted column by query encryption transformation
    16.
    发明授权
    Query processing system and method for database with encrypted column by query encryption transformation 有权
    通过查询加密转换加密列的数据库查询处理系统和方法

    公开(公告)号:US08055678B2

    公开(公告)日:2011-11-08

    申请号:US12251874

    申请日:2008-10-15

    IPC分类号: G06F17/30

    CPC分类号: G06F21/6227

    摘要: Query processing system and method by query transformation transform a user request query based on an original DB structure, destined to a DBMS of a DB with some columns encrypted, into a query based on an encrypted DB structure so that the DBMS processes the query. The query is processed irrespective of whether or not the query includes an encryption-related item, and query-processing performance is remarkably improved.

    摘要翻译: 通过查询转换的查询处理系统和方法将基于原始数据库结构的用户请求查询转换为基于加密DB结构的查询中的目标数据库,其中DBMS具有加密的一些列,以便DBMS处理查询。 无论查询是否包含加密相关项,查询都被处理,查询处理性能显着提高。

    METHOD OF TRANSMITTING OF DATA AND CONFIGURING A CODEBOOK IN MULTI ANTENNA SYSTEM
    19.
    发明申请
    METHOD OF TRANSMITTING OF DATA AND CONFIGURING A CODEBOOK IN MULTI ANTENNA SYSTEM 失效
    数据传输方法和配置多天线系统中的代码

    公开(公告)号:US20110051834A1

    公开(公告)日:2011-03-03

    申请号:US12666777

    申请日:2008-06-24

    IPC分类号: H04L1/02

    CPC分类号: H04W52/346

    摘要: Methods of controlling a transmission power and configuring a codebook in a multi-antenna system to solve a transmission power unbalance between antennas are disclosed. The method of transmitting data in a multi-antenna system includes (A) transmitting one or more pilot signals within a first symbol region through a first antenna unit, and (B) transmitting one or more pilot signals within a second symbol region through a second antenna unit, wherein data within the first symbol region is transmitted through the second antenna unit, and data within the second symbol region is transmitted through the first antenna unit. According to the present invention, since a transmission power unbalance between antennas is solved, a transmission power can be uniformly assigned to each antenna and channel estimation can be easily performed. Moreover, a power amplifier having a uniform amplification range can be used and designed.

    摘要翻译: 公开了在多天线系统中控制发射功率和配置码本以解决天线之间的发射功率不平衡的方法。 在多天线系统中发送数据的方法包括:(A)通过第一天线单元在第一符号区域内传输一个或多个导频信号,以及(B)通过第二天线单元在第二符号区域内传输一个或多个导频信号 天线单元,其中通过第二天线单元发送第一符号区域内的数据,并且通过第一天线单元发送第二符号区域内的数据。 根据本发明,由于天线之间的发送功率不平衡被解决,所以可以将发送功率均匀地分配给每个天线,并且可以容易地进行信道估计。 此外,可以使用和设计具有均匀放大范围的功率放大器。

    Method for receiving signals in multiple user system
    20.
    发明授权
    Method for receiving signals in multiple user system 有权
    在多用户系统中接收信号的方法

    公开(公告)号:US07835260B2

    公开(公告)日:2010-11-16

    申请号:US12298219

    申请日:2007-04-20

    IPC分类号: H04J11/00

    摘要: This document is related to a method for receiving signals in multi-user system, the method comprising: receiving signals form 2 or more mobile stations using ‘k’-th radio resource and ‘k+m’-th radio resource; estimating a channel matrix using the received signals; calculating a weight matrix so that the channel matrix have an orthogonality to the signals from each of the mobile stations; transmitting the weight matrix to each of the mobile stations; and receiving signals that the weight matrix is applied by each of the mobile stations. By doing so, we can increase the transmission efficiency through obtaining both orthogonality and diversity gain in the multi-user MIMO system.

    摘要翻译: 本文件涉及一种用于在多用户系统中接收信号的方法,所述方法包括:使用第k个无线电资源和第k + m个无线电资源从2个或更多的移动台接收信号; 使用所接收的信号估计信道矩阵; 计算权重矩阵,使得信道矩阵具有来自每个移动站的信号的正交性; 将权重矩阵发送到每个移动站; 以及接收每个移动台应用权重矩阵的信号。 通过这样做,我们可以通过在多用户MIMO系统中获得正交性和分集增益来提高传输效率。