公开(公告)号：US08184052B1

公开(公告)日：2012-05-22

申请号：US12562782

申请日：2009-09-18

申请人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

发明人： Songping Wu ,  Manyuan Shen ,  Quan Zhou ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC分类号： H01Q3/00 ,  H01Q3/26

CPC分类号： H04B7/0617 ,  H01Q3/2605 ,  H01Q3/40 ,  H04B7/0417 ,  H04B7/0634 ,  H04B7/088

摘要： A method for beamforming in a communication system includes receiving a plurality of signals via a plurality of antennas, where the plurality of signals corresponds to at least one known training signal, generating a respective one of a plurality of different antenna weight vectors to be applied to the plurality of antennas as each of the plurality of signals is received, where each of the plurality of antenna weight vectors is a respective base vector of a unitary matrix, and generating a receiver antenna weight vector based on at least the received plurality of signals, the plurality of different antenna weight vectors, and the at least one known training signal.

摘要翻译： 一种用于通信系统中的波束成形的方法包括经由多个天线接收多个信号，其中多个信号对应于至少一个已知的训练信号，产生要应用于多个不同的天线权重向量中的相应一个 接收作为多个信号中的每一个的多个天线，其中多个天线权重向量中的每一个是酉矩阵的相应基本向量，并且至少基于所接收的多个信号生成接收机天线权重向量， 所述多个不同的天线权重向量和所述至少一个已知的训练信号。

公开(公告)号：US08175197B2

公开(公告)日：2012-05-08

申请号：US11717405

申请日：2007-03-13

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H03D1/00

CPC分类号： H04L27/2656 ,  H04L5/023 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675

摘要： A system includes a correlation module and a control module. The correlation module is configured to generate correlation values based on a correlation of modulated signals with a plurality of preamble sequences and generate correlation values. The modulated signals include sub-carriers modulated using orthogonal frequency domain multiplexing (OFDM). The control module is configured to select a largest correlation value from the correlation values and detect one of the preamble sequences in the modulated signals upon determining that a magnitude of the largest correlation value is greater than or equal to a first predetermined threshold. The control module divides N of the sub-carriers into L bands in response to a channel gain of the sub-carriers not being substantially the same for all of the sub-carriers, where N and L are integers greater than 1, and where each of the L bands includes N/L of the sub-carriers.

摘要翻译： 系统包括相关模块和控制模块。 相关模块被配置为基于调制信号与多个前同步码序列的相关性生成相关值，并且生成相关值。 调制信号包括使用正交频域复用（OFDM）调制的子载波。 控制模块被配置为从相关值中选择最大相关值，并且在确定最大相关值的大小大于或等于第一预定阈值时，检测调制信号中的前导序列之一。 响应于子载波的信道增益对于所有子载波基本不相同，其中N和L是大于1的整数，控制模块将N个子载波分成L个波段，并且其中每个 的L个波段包括N / L个子载波。

公开(公告)号：US08135098B2

公开(公告)日：2012-03-13

申请号：US12119264

申请日：2008-05-12

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC分类号： H04B1/10

CPC分类号： H04B1/1027 ,  H04L25/067

摘要： Systems and methods are provided for computing soft information for digital information based on a received signal, where the received signal suffers from noise and interference. A receiver that decodes the received signal may estimate channel information, such as the channel gain, associated with the interfering source. The receiver may also obtain modulation information through a backbone network or by decoding control information transmitted by the interfering source. Using the modulation information and the channel information, the receiver may estimate the effect that interference has on the received signal, and may compute soft information (e.g., a log-likelihood ratio) for the digital information.

摘要翻译： 提供了系统和方法，用于基于接收到的信号来计算用于数字信息的软信息，其中所接收的信号受到噪声和干扰的影响。 对接收到的信号进行解码的接收机可以估计与干扰源相关联的信道信息，例如信道增益。 接收机还可以通过骨干网获得调制信息，或通过解码由干扰源发送的控制信息。 使用调制信息和信道信息，接收机可以估计干扰对接收信号的影响，并且可以计算数字信息的软信息（例如，对数似然比）。

公开(公告)号：US08130853B1

公开(公告)日：2012-03-06

申请号：US12645644

申请日：2009-12-23

申请人： Hui-Ling Lou ,  Kok-Wui Cheong

发明人： Hui-Ling Lou ,  Kok-Wui Cheong

IPC分类号： H04L5/12 ,  H04L27/06

CPC分类号： H04L1/0052 ,  H03M13/4107 ,  H03M13/6331 ,  H04L1/0054

摘要： A method and apparatus for processing a frequency domain digital Orthogonal Frequency Division Multiplexing (OFDM) symbol. The method includes generating an estimate of a channel for each sub-carrier of the frequency domain digital OFDM symbol; generating a plurality of demodulated symbols based, at least in part on, the estimate of the channel for each sub-carrier, in which each demodulated symbol corresponding to a given sub-carrier of the frequency domain digital OFDM symbol; calculating a decision metric for each sub-carrier based on (i) the channel estimate corresponding to the sub-carrier and (ii) the demodulated symbol corresponding to the sub-carrier; and estimating a most likely transmitted symbol for each sub-carrier of the frequency domain digital OFDM symbol based on the decision metric corresponding to the sub-carrier.

摘要翻译： 一种用于处理频域数字正交频分复用（OFDM）符号的方法和装置。 该方法包括：生成针对频域数字OFDM符号的每个子载波的信道的估计; 至少部分地基于每个子载波的信道的估计来生成多个解调符号，其中每个解调的符号对应于频域数字OFDM符号的给定子载波; 基于（i）对应于子载波的信道估计和（ii）对应于子载波的解调符号，计算每个子载波的决策度量; 以及基于与所述子载波对应的所述决定度量，估计所述频域数字OFDM符号的每个子载波的最可能的发送符号。

公开(公告)号：US08099050B1

公开(公告)日：2012-01-17

申请号：US12544567

申请日：2009-08-20

申请人： Jungwon Lee ,  Dimitrios-Alexandros Toumpakaris ,  Hui-Ling Lou ,  Chris Cheng-Chieh Lee

发明人： Jungwon Lee ,  Dimitrios-Alexandros Toumpakaris ,  Hui-Ling Lou ,  Chris Cheng-Chieh Lee

IPC分类号： H04B1/16

CPC分类号： H04L27/2334 ,  H04B1/1653 ,  H04H20/34 ,  H04H40/18 ,  H04H2201/13

摘要： Methods and apparatus are provided for receiving a first signal and generating an output signal indicative of radio data system (“RDS”) information. A receiver circuit of the invention can include mixer circuitry, lowpass filter circuitry, downsampler circuitry, and decoder circuitry. Advantageously, the receiver circuit can operate entirely within the digital domain, promoting interoperability with digital frequency modulation (“FM”) demodulator circuitry.

摘要翻译： 提供了用于接收第一信号并产生指示无线电数据系统（“RDS”）信息的输出信号的方法和装置。 本发明的接收机电路可以包括混频器电路，低通滤波器电路，下采样器电路和解码器电路。 有利地，接收器电路可以完全在数字域内操作，促进与数字频率调制（“FM”）解调器电路的互操作性。

公开(公告)号：US08077785B1

公开(公告)日：2011-12-13

申请号：US12098924

申请日：2008-04-07

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Jihwan P. Choi ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04B7/0682 ,  H04B7/0413 ,  H04B7/0465

摘要： A method for determining a phase of each of a plurality of transmitting antennas in a multiple input and multiple output (MIMO) communication system includes: calculating, for first and second ones of the plurality of transmitting antennas, a value based on first and second groups of channel gains, the first group including channel gains between the first transmitting antenna and each of a plurality of receiving antennas, the second group including channel gains between the second transmitting antenna and each of the plurality of receiving antennas; and determining the phase of each of the plurality of transmitting antennas based on at least the value.

摘要翻译： 一种用于确定多输入多输出（MIMO）通信系统中的多个发射天线中的每一个的相位的方法，包括：针对所述多个发射天线中的第一和第二发射天线的第一和第二发射天线，基于第一和第二组 所述第一组包括所述第一发射天线与所述多个接收天线中的每一个之间的信道增益，所述第二组包括所述第二发射天线与所述多个接收天线中的每一个之间的信道增益; 以及至少基于所述值确定所述多个发射天线中的每一个的相位。

公开(公告)号：US08014456B1

公开(公告)日：2011-09-06

申请号：US11820397

申请日：2007-06-19

申请人： Jongwon Lee ,  Hui-Ling Lou

发明人： Jongwon Lee ,  Hui-Ling Lou

IPC分类号： H04K1/10

CPC分类号： H04L27/2655 ,  H04L27/2657 ,  H04L27/2675

摘要： A system includes a differential demodulation module that differentially demodulates modulated signals received from R antennas. A first summing module sums the differentially demodulated signals to generate a combined signal. A state detection module detects states of X symbols in the combined signal. A second summing module (i) receives Y preamble sequences each comprising X predetermined symbols and (ii) generates X sums for each of the Y preamble sequences by adding each of the states of the X symbols with corresponding states of the X predetermined symbols of each of Y preamble sequences. The states of the X predetermined symbols are generated by inverting states of derived symbols in derived preamble sequences, which are derived from the Y preamble sequences. Each of the Y preamble sequences is different from others of the Y preamble sequences. R, X, and Y are integers greater than 1.

摘要翻译： 一种系统包括差分解调从R个天线接收的调制信号的差分解调模块。 第一求和模块将差分解调信号相加以产生组合信号。 状态检测模块检测组合信号中的X个符号的状态。 第二求和模块（i）接收每个包括X个预定符号的Y个前同步码序列，并且（ii）通过将X个符号的每个状态与每个X个符号的X个预定符号的相应状态相加，生成每个Y个前同步码序列的X个和 的前导码序列。 X个预定符号的状态是通过从导出的前同步码序列中导出的导出符号的状态反转而产生的，这些前导码序列是从Y个前同步码序列导出的。 Y前同步码序列中的每一个与Y前同步码序列中的其他序列不同。 R，X和Y是大于1的整数。

公开(公告)号：US07970066B1

公开(公告)日：2011-06-28

申请号：US11963294

申请日：2007-12-21

申请人： Jungwon Lee ,  Qing Zhao ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Qing Zhao ,  Hui-Ling Lou

IPC分类号： H04L27/28

CPC分类号： H04L27/08 ,  H03G3/3052 ,  H03G3/3078 ,  H04L27/2626

摘要： A system includes an input, a variable gain amplifier (VGA), and an automatic gain control (AGC) module. The input receives an input signal. The input signal includes frames of N symbols modulated using orthogonal frequency division multiplexing (OFDM), wherein a cyclic prefix (CP) precedes each of the N symbols, and wherein N is an integer greater than 1. The VGA provides a gain when amplifying the input signal. The AGC module selectively adjusts the gain of the VGA during the CP preceding M of the N symbols, wherein M is an integer greater than 1.

摘要翻译： 一种系统包括输入，可变增益放大器（VGA）和自动增益控制（AGC）模块。 输入接收输入信号。 输入信号包括使用正交频分复用（OFDM）调制的N个符号的帧，其中循环前缀（CP）在N个符号之前，并且其中N是大于1的整数。当VGA放大 输入信号。 AGC模块在N个符号之前的M之前的CP期间选择性地调整VGA的增益，其中M是大于1的整数。

公开(公告)号：US07864091B1

公开(公告)日：2011-01-04

申请号：US12157255

申请日：2008-06-09

申请人： Songping Wu ,  Yui Lin ,  Hui-Ling Lou

发明人： Songping Wu ,  Yui Lin ,  Hui-Ling Lou

IPC分类号： H03M1/62

CPC分类号： H03M1/181 ,  H03M1/186

摘要： A system comprises a gain control module that selectively generates a gain locked signal based on a wireless input signal. A sync detect module that selectively generates a sync detect signal based on the wireless input signal. An interference detection module that selectively generates a wireless interference detection signal based on the gain locked signal and the sync detect signal.

摘要翻译： 一种系统包括：增益控制模块，其根据无线输入信号选择性地产生增益锁定信号。 同步检测模块，其基于无线输入信号选择性地产生同步检测信号。 干扰检测模块，其基于增益锁定信号和同步检测信号有选择地生成无线干扰检测信号。

公开(公告)号：US07847732B1

公开(公告)日：2010-12-07

申请号：US12535349

申请日：2009-08-04

申请人： Rohit Nabar ,  Hui-Ling Lou ,  Peter Loc

发明人： Rohit Nabar ,  Hui-Ling Lou ,  Peter Loc

IPC分类号： H01Q3/00

CPC分类号： H04B7/0417 ,  H01Q3/267 ,  H04B7/0617 ,  H04B7/0621 ,  H04B7/0626 ,  H04B7/0634

摘要： A first network device includes a calibration module configured to receive a training signal from a second network device. The training signal indicates the second network device is capable of adjusting beamforming weights associated with the second network device based on a steering matrix received from the first network device. A steering module is configured to determine a first steering matrix for the second network device based on the training signal. The steering module is configured to transmit the first steering matrix to the second network device for adjustment of the beamforming weights associated with the second network device.

摘要翻译： 第一网络设备包括被配置为从第二网络设备接收训练信号的校准模块。 训练信号指示第二网络设备能够基于从第一网络设备接收到的导向矩阵来调整与第二网络设备相关联的波束成形权重。 转向模块被配置为基于训练信号确定第二网络设备的第一导引矩阵。 转向模块被配置为将第一导向矩阵发送到第二网络设备，用于调整与第二网络设备相关联的波束成形权重。