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公开(公告)号：US08675761B2
公开(公告)日：2014-03-18
申请号：US12815540
申请日：2010-06-15
申请人： Djordje Tujkovic , Vummintala Shashidhar , Erik Stauffer , Rishi Ranjan , Soumen Chakraborty , Bertrand Hochwald , Sriram Rajagopal , Sam Alex
发明人： Djordje Tujkovic , Vummintala Shashidhar , Erik Stauffer , Rishi Ranjan , Soumen Chakraborty , Bertrand Hochwald , Sriram Rajagopal , Sam Alex
IPC分类号： H04L1/02
CPC分类号： H04B7/0671 , H04B7/0691
摘要： Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.
摘要翻译： 公开了分配用于循环延迟分集（CDD）传输的天线的方法和装置。 一种方法包括估计具有多个天线的收发机的传输信道。 基于估计的传输信道来选择多个收发天线的子集。 基于单个收发器天线的传输路径的信道质量来识别该子集的单个收发天线。 从多个天线的子集中发送循环延迟分集（CDD）信号，其中从所述多个收发器天线的子集的所识别的单个收发器天线发送最小延迟的CDD信号。
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公开(公告)号：US20110223870A1
公开(公告)日：2011-09-15
申请号：US12815540
申请日：2010-06-15
申请人： Djordje Tujkovic , Vummintala Shashidhar , Erik Stauffer , Rishi Ranjan , Soumen Chakraborty , Bertrand Hochwald , Sriram Rajagopal , Sam Alex
发明人： Djordje Tujkovic , Vummintala Shashidhar , Erik Stauffer , Rishi Ranjan , Soumen Chakraborty , Bertrand Hochwald , Sriram Rajagopal , Sam Alex
CPC分类号： H04B7/0671 , H04B7/0691
摘要： Methods and apparatus of allocating antennas for cyclic delay diversity (CDD) transmission are disclosed. One method includes estimating a transmission channel of a transceiver having a plurality of antennas. A subset of a plurality of transceiver antennas is selected based on the estimated transmission channel. A single transceiver antenna of the subset is identified based on a channel quality of a transmission path of the single transceiver antenna. Cyclic delay diversity (CDD) signals are transmitted from the subset of the plurality of antennas, wherein a minimally delayed CDD signal is transmitted from the identified single transceiver antenna of the subset of the plurality of transceiver antennas.
摘要翻译： 公开了分配用于循环延迟分集（CDD）传输的天线的方法和装置。 一种方法包括估计具有多个天线的收发机的传输信道。 基于估计的传输信道来选择多个收发天线的子集。 基于单个收发器天线的传输路径的信道质量来识别该子集的单个收发天线。 从多个天线的子集中发送循环延迟分集（CDD）信号，其中从所述多个收发器天线的子集的所识别的单个收发器天线发送最小延迟的CDD信号。
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公开(公告)号：US08855250B2
公开(公告)日：2014-10-07
申请号：US13252047
申请日：2011-10-03
申请人： Sam Alex , Rajesh Manakkal , Shashidhar Vummintala
发明人： Sam Alex , Rajesh Manakkal , Shashidhar Vummintala
CPC分类号： H04W52/52
摘要： A wireless communication device is disclosed that includes an automatic gain controller capable of accurately adjusting gain of a received signal. The received signal includes a plurality of symbols, including pilot symbols that each includes at least one pilot tone, and data symbols that do not include any pilot tones. A power of a pilot symbol is determined, and a power of a data symbol is determined. The determined data symbol power is then scaled by a scaling factor (that depends on various system parameters) and is subtracted from the determined pilot symbol power to provide an estimate of a power of the pilot tones within the signal. From the estimated pilot tone power, the automatic gain controller can accurately determine a preferred gain for amplifying future frames of the received signal.
摘要翻译： 公开了一种无线通信设备，其包括能够精确地调整接收信号的增益的自动增益控制器。 所接收的信号包括多个符号，包括每个包括至少一个导频音的导频符号，以及不包括任何导频音的数据符号。 确定导频符号的功率，并且确定数据符号的功率。 然后，通过缩放因子（取决于各种系统参数）对所确定的数据符号功率进行缩放，并从确定的导频符号功率中减去以提供该信号内的导频音的功率的估计。 从估计的导频音功率，自动增益控制器可以准确地确定用于放大接收信号的未来帧的优选增益。
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公开(公告)号：US20130083831A1
公开(公告)日：2013-04-04
申请号：US13252047
申请日：2011-10-03
申请人： Sam ALEX , Rajesh MANAKKAL , Shashidhar VUMMINTALA
发明人： Sam ALEX , Rajesh MANAKKAL , Shashidhar VUMMINTALA
CPC分类号： H04W52/52
摘要： A wireless communication device is disclosed that includes an automatic gain controller capable of accurately adjusting gain of a received signal. The received signal includes a plurality of symbols, including pilot symbols that each includes at least one pilot tone, and data symbols that do not include any pilot tones. A power of a pilot symbol is determined, and a power of a data symbol is determined. The determined data symbol power is then scaled by a scaling factor (that depends on various system parameters) and is subtracted from the determined pilot symbol power to provide an estimate of a power of the pilot tones within the signal. From the estimated pilot tone power, the automatic gain controller can accurately determine a preferred gain for amplifying future frames of the received signal.
摘要翻译： 公开了一种无线通信设备，其包括能够精确地调整接收信号的增益的自动增益控制器。 所接收的信号包括多个符号，包括每个包括至少一个导频音的导频符号，以及不包括任何导频音的数据符号。 确定导频符号的功率，并且确定数据符号的功率。 然后，通过缩放因子（取决于各种系统参数）对所确定的数据符号功率进行缩放，并从确定的导频符号功率中减去以提供该信号内的导频音的功率的估计。 从估计的导频音功率，自动增益控制器可以准确地确定用于放大接收信号的未来帧的优选增益。
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