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公开(公告)号：US20100264902A1
公开(公告)日：2010-10-21
申请号：US12825775
申请日：2010-06-29
IPC分类号： G01R23/16
摘要： A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts.
摘要翻译： 系统包括采样模块，计数器模块和频率特征模块。 采样模块在第一通道上采样第一预定周期的射频（RF）信号和在第一预定周期之后的第二预定周期。 当在第一和第二预定时段期间收集的样本分别反向极性时，计数器模块递增第一和第二计数。 频率特性模块基于第一和第二计数中的至少一个来确定RF信号的频率，并且基于第一和第二计数确定RF信号的频率变化。
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公开(公告)号：US08346174B2
公开(公告)日：2013-01-01
申请号：US12825775
申请日：2010-06-29
IPC分类号： H04B7/00
摘要： A system including a sampling module that generates samples of RF signals on a first channel during first, second, and third periods, which do not overlap. A difference module determines a first difference between i) a first count of polarity reversals during the first period and ii) a second count of polarity reversals during the second period; a second difference between i) the second count and ii) a third count of polarity reversals during the third period; and a third difference between the first and second differences. A third module determines a frequency of the RF signals based on at least one of the first and second counts, determines a frequency variation of the RF signals based on the first and second counts, and identifies a radar type of the RF signals based on at least one of the third difference and the frequency variation.
摘要翻译： 一种系统，包括采样模块，其在第一，第二和第三周期期间在第一通道上产生不重叠的RF信号样本。 差分模块确定i）在第一周期期间的极性反转的第一计数和ii）在第二周期期间的极性反转的第二计数的第一差异; i）第二计数和ii）在第三周期期间极性反转的第三计数的第二个差异; 以及第一和第二差异之间的第三个差异。 第三模块基于第一计数和第二计数中的至少一个来确定RF信号的频率，基于第一和第二计数确定RF信号的频率变化，并且基于at来识别RF信号的雷达类型 第三个差异和频率变化中的至少一个。
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公开(公告)号：US07747222B2
公开(公告)日：2010-06-29
申请号：US11493473
申请日：2006-07-26
IPC分类号： H04B7/00
摘要： A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts.
摘要翻译： 系统包括采样模块，计数器模块和频率特征模块。 采样模块在第一通道上采样第一预定周期的射频（RF）信号和在第一预定周期之后的第二预定周期。 当在第一和第二预定时段期间收集的样本分别反向极性时，计数器模块递增第一和第二计数。 频率特性模块基于第一和第二计数中的至少一个来确定RF信号的频率，并且基于第一和第二计数确定RF信号的频率变化。
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公开(公告)号：US20070135057A1
公开(公告)日：2007-06-14
申请号：US11493473
申请日：2006-07-26
申请人： Bhaskar Nallapureddy , Songping Wu , Tsunglun Yu , Hui-Ling Lou
发明人： Bhaskar Nallapureddy , Songping Wu , Tsunglun Yu , Hui-Ling Lou
摘要： A system includes a sampling module, a counter module, and a frequency characteristic module. The sampling module samples radio frequency (RF) signals on a first channel for a first predetermined period and a second predetermined period that is subsequent to the first predetermined period. The counter module increments first and second counts when the samples collected during the first and second predetermined periods reverse polarity, respectively. The frequency characteristic module determines a frequency of the RF signal based on at least one of the first and the second counts and determines frequency variation of the RF signal based on the first and second counts.
摘要翻译： 系统包括采样模块，计数器模块和频率特征模块。 采样模块在第一通道上采样第一预定周期的射频（RF）信号和在第一预定周期之后的第二预定周期。 当在第一和第二预定时段期间收集的样本分别反向极性时，计数器模块递增第一和第二计数。 频率特性模块基于第一和第二计数中的至少一个来确定RF信号的频率，并且基于第一和第二计数确定RF信号的频率变化。
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5.发明申请DATA SYMBOL MAPPING FOR MULTIPLE-INPUT MULTIPLE-OUTPUT HYBRID AUTOMATIC REPEAT REQUEST 有权用于多输入多输出混合自动重复请求的数据符号映射公开(公告)号：US20090262855A1
公开(公告)日：2009-10-22
申请号：US12410044
申请日：2009-03-24
CPC分类号： H04L1/0009 , H04B7/0669 , H04B7/0689 , H04B7/0697 , H04L1/0625 , H04L1/0668 , H04L1/1816 , H04L1/1845
摘要： A system includes an encoding module, a symbol selection module, a subcarrier selection module, and a mapping module. The encoding module receives symbols for transmission over K subcarriers and T antennas, encodes the symbols using a space time code, and generates space time coded (STC) versions of the symbols, where K and T are integers greater than 1. The symbol selection module selects T adjacent ones of the symbols and selects STC versions of the T adjacent ones of the symbols. The subcarrier selection module selects one of the K subcarriers for transmitting the T adjacent ones of the symbols and the STC versions of the T adjacent ones of the symbols. The mapping module maps the T adjacent ones of the symbols onto the T antennas for transmission over the selected one of the K subcarriers, respectively, and maps the STC versions of the T adjacent ones of the symbols onto the T antennas for transmission over the selected one of the K subcarriers.
摘要翻译： 系统包括编码模块，符号选择模块，子载波选择模块和映射模块。 编码模块接收用于通过K个子载波和T个天线进行传输的符号，并使用空时码对该符号进行编码，并生成符号的空时编码（STC）版本，其中K和T是大于1的整数。符号选择模块 选择T个相邻的符号，并选择T个相邻符号的STC版本。 子载波选择模块选择用于发送T个相邻符号的T个子载波之一和T个相邻符号的STC版本。 映射模块将T个相邻的符号映射到T个天线上，以便在所选的K个子载波之间分别传输，并将T个相邻的符号的STC版本映射到T个天线上，以便通过所选择的 K个子载波之一。
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公开(公告)号：US08675783B1
公开(公告)日：2014-03-18
申请号：US13309684
申请日：2011-12-02
CPC分类号： H04L1/0054 , H03M13/45 , H04L25/03171 , H04L25/03242 , H04L25/03318
摘要： Systems and methods are provided for determining a data value for a bit of interest in a received data signal. A closest 0-bit symbol candidate is selected from a plurality of 0-bit symbol candidates using a symbol selection distance approximation. A closest 1-bit symbol candidate is selected from a plurality of 1-bit symbol candidates using the symbol selection distance approximation. A 0-bit distance between the received data signal and the selected 0-bit symbol candidate is determined, and a 1-bit distance between the received data signal and the selected 1-bit symbol candidate is determined. A log likelihood ratio is calculated for the bit of interest using the determined 0-bit distance and the determined 1-bit distance.
摘要翻译： 系统和方法被提供用于确定接收到的数据信号中感兴趣的位的数据值。 使用符号选择距离近似从多个0位符号候选中选择最接近的0位符号候选。 使用符号选择距离近似，从多个1位符号候选中选择最接近的1位符号候选。 确定接收到的数据信号和所选择的0位符号候选之间的0比特距离，并确定接收到的数据信号与所选择的1比特符号候选之间的1比特距离。 使用所确定的0比特距离和所确定的1比特距离来计算感兴趣比特的对数似然比。
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7.发明授权Data symbol mapping for multiple-input multiple-output hybrid automatic repeat request 有权用于多输入多输出混合自动重复请求的数据符号映射公开(公告)号：US08279963B2
公开(公告)日：2012-10-02
申请号：US12410044
申请日：2009-03-24
CPC分类号： H04L1/0009 , H04B7/0669 , H04B7/0689 , H04B7/0697 , H04L1/0625 , H04L1/0668 , H04L1/1816 , H04L1/1845
摘要： A system includes an encoding module, a symbol selection module, a subcarrier selection module, and a mapping module. The encoding module receives symbols for transmission over K subcarriers and T antennas, encodes the symbols using a space time code, and generates space time coded (STC) versions of the symbols, where K and T are integers greater than 1. The symbol selection module selects T adjacent ones of the symbols and selects STC versions of the T adjacent ones of the symbols. The subcarrier selection module selects one of the K subcarriers for transmitting the T adjacent ones of the symbols and the STC versions of the T adjacent ones of the symbols. The mapping module maps the T adjacent ones of the symbols onto the T antennas for transmission over the selected one of the K subcarriers, respectively, and maps the STC versions of the T adjacent ones of the symbols onto the T antennas for transmission over the selected one of the K subcarriers.
摘要翻译： 系统包括编码模块，符号选择模块，子载波选择模块和映射模块。 编码模块接收用于通过K个子载波和T个天线进行传输的符号，并使用空时码对该符号进行编码，并生成符号的空时编码（STC）版本，其中K和T是大于1的整数。符号选择模块 选择T个相邻的符号，并选择T个相邻符号的STC版本。 子载波选择模块选择用于发送T个相邻符号的T个子载波之一和T个相邻符号的STC版本。 映射模块将T个相邻的符号映射到T个天线上，以便在所选的K个子载波之间分别传输，并将T个相邻的符号的STC版本映射到T个天线上，以便通过所选择的 K个子载波之一。
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公开(公告)号：US08488698B1
公开(公告)日：2013-07-16
申请号：US13194093
申请日：2011-07-29
申请人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
发明人： Qing Zhao , Jungwon Lee , Leilei Song , Songping Wu , Hui-Ling Lou
CPC分类号： H04L27/2656 , H04L27/2676
摘要： In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.
摘要翻译： 在用于将接收机同步到同步信号的方法中，在基于具有变化增益的自动增益控制（AGC）处理的信号中，检测到符号。 基于检测到的符号确定后续帧的估计开始。 AGC的增益在AGC期间处理后续帧的估计开始的期间是固定的。 分析信号的变换以确定后续帧的估计开始是否对应于后续帧的实际开始。 如果后续帧的估计开始不对应于后续帧的实际开始，则允许AGC的增益恢复变化，并且检测到信号中的另外的符号，该信号已经根据变化 增益AGC。
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公开(公告)号：US08477813B2
公开(公告)日：2013-07-02
申请号：US12548205
申请日：2009-08-26
申请人： Hongyuan Zhang , Rohit U. Nabar , Manyuan Shen , Songping Wu , Hui-Ling Lou , Yong Liu
发明人： Hongyuan Zhang , Rohit U. Nabar , Manyuan Shen , Songping Wu , Hui-Ling Lou , Yong Liu
IPC分类号： H04J3/06
CPC分类号： H04W16/28 , H04L25/03343 , H04L27/2613 , H04L2025/03426 , H04L2025/03789 , H04L2025/03815
摘要： In a wireless communication system wherein communication devices exchange information utilizing data units that conform to a first format, a beamforming training (BFT) data unit that conforms to a second format is transmitted, wherein a length of the BFT data unit is shorter than lengths supported by the first format, wherein the BFT data unit is for transmitting PHY beamforming training information. Information to indicate the BFT data unit conforms to the second format is transmitted to a receiving device. The BFT data unit is generated according to the second format, wherein the BFT data unit includes BFT information elements. The BFT data unit is then transmitted to the receiving device.
摘要翻译： 在其中通信设备利用符合第一格式的数据单元交换信息的无线通信系统中，发送符合第二格式的波束形成训练（BFT）数据单元，其中所述BFT数据单元的长度短于所支持的长度 通过第一格式，其中BFT数据单元用于发送PHY波束形成训练信息。 用于指示符合第二格式的BFT数据单元的信息被发送到接收设备。 BFT数据单元根据第二格式生成，其中BFT数据单元包括BFT信息元素。 然后将BFT数据单元发送到接收设备。
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公开(公告)号：US08195112B1
公开(公告)日：2012-06-05
申请号：US12481884
申请日：2009-06-10
CPC分类号： H04W52/225 , H04W52/226
摘要： Time-reversal filtering may be used to temporally focus a signal to be transmitted. Power can be reduced at the transmitter so that the temporally focused signal is within spectral mask requirements. In one embodiment, the effect of the time-reversal filter on the power spectral density for a particular transmitted signal can be calculated and the predicted power spectral density can be compared to the permitted spectral mask to identify violations, if any, of the spectral mask. The transmitter power can then be reduced by the amount of the violation. In another embodiment, a set of different time-reversal filters that meet the spectral mask requirements can be provided in advance, and the most appropriate filter—e.g., the one with the best signal-to-noise ratio for the particular signal—can be chosen from the set of filters.
摘要翻译： 可以使用时间反转滤波来暂时聚焦待传输的信号。 在发射机处可以降低功率，使得时间聚焦的信号在频谱掩模要求之内。 在一个实施例中，可以计算时间反转滤波器对于特定发射信号的功率谱密度的影响，并且可以将预测的功率谱密度与允许的光谱掩模进行比较以识别光谱掩模（如果有的话） 。 然后可以将发射机功率减少违规量。 在另一个实施例中，可以预先提供满足频谱掩模要求的一组不同的时间反转滤波器，并且最合适的滤波器（例如，对于特定信号具有最佳信噪比的滤波器）可以是 从一组过滤器中选择。
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