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11. 发明授权

US08442166B2 Preamble detection with unknown channel 有权
标题翻译：前导码检测与未知信道
公开(公告)号：US08442166B2
公开(公告)日：2013-05-14
申请号：US13460109
申请日：2012-04-30
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 including a control module and a correlation module. The control module partitions a total number of subcarriers, in a received signal, into a predetermined number of bands. The correlation module generates a plurality of correlation values for a plurality of preamble sequences. A correlation value for a preamble sequence is generated by correlating symbols in each band with corresponding symbols in the preamble sequence to generate correlations for each band, adding the correlations generated for a respective band to generate a sum for each band, and adding the sums generated for all the bands. The control module select a largest correlation value from the plurality of correlation values and determine that one of the preamble sequences is detected in the received signal in response to the largest correlation value being greater than or equal to a predetermined threshold.
摘要翻译：一种包括控制模块和相关模块的系统。控制模块将接收到的信号中的副载波的总数分成预定数量的频带。相关模块为多个前同步码序列生成多个相关值。通过将每个频带中的符号与前导码序列中的相应符号相关联来产生前导码序列的相关值，以产生每个频带的相关性，将针对各个频带生成的相关相加，以产生每个频带的和，并将所产生的和相加对于所有的乐队。所述控制模块根据所述多个相关值选择最大相关值，并且响应于所述最大相关值大于或等于预定阈值，确定在所述接收信号中检测到所述前导码序列之一。

12. 发明授权

US08345795B1 System and method of beamforming with reduced feedback 有权
标题翻译：具有减少反馈的波束成形的系统和方法
公开(公告)号：US08345795B1
公开(公告)日：2013-01-01
申请号：US13407435
申请日：2012-02-28
申请人： Jungwon Lee , Rohit Nabar , Hui-Ling Lou
发明人： Jungwon Lee , Rohit Nabar , Hui-Ling Lou
IPC分类号： H04K1/02 , H04L25/03 , H04L25/49
CPC分类号： H04B7/0408 , H04B1/00 , H04B7/0417 , H04B7/0465 , H04B7/0473 , H04B7/0663 , H04L5/0023 , H04L25/0204 , H04L2025/03414 , H04L2025/03426
摘要： A system and method of beamforming may reduce feedback requirements. In some implementations, a beamforming technique may employ a diagonal matrix as a beamforming matrix along with a stream-to-transmit antenna mapping matrix. In some antenna phase beamforming strategies, a diagonal beamforming matrix in which the diagonal elements have a constant magnitude may be employed. Accordingly, a beamforming system may be utilized with few feedback information bits being transmitted from the beamformee; such a system may also minimize or eliminate power fluctuations among multiple transmit antennae.
摘要翻译：波束成形的系统和方法可以减少反馈要求。在一些实现中，波束形成技术可以采用对角矩阵作为波束形成矩阵以及流到发射天线映射矩阵。在一些天线相位波束形成策略中，可以采用其中对角元素具有恒定幅度的对角波束形成矩阵。因此，可以利用波束形成系统，而从波束形成器发送的反馈信息比特数很少; 这样的系统还可以最小化或消除多个发射天线之间的功率波动。

13. 发明授权

US08229017B1 Transmit beamforming utilizing channel estimation matrix decomposition feedback in a wireless MIMO communication system 有权
标题翻译：使用无线MIMO通信系统中的信道估计矩阵分解反馈来发射波束成形
公开(公告)号：US08229017B1
公开(公告)日：2012-07-24
申请号：US12330268
申请日：2008-12-08
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： H04B7/02
CPC分类号： H04B7/0665
摘要： A method and apparatus for a communication system having a first transceiver device having a first plurality of antennas and a second transceiver device having a second plurality of antennas determines a channel estimation matrix describing a forward channel in which a signal travels from the first transceiver device to the second transceiver device. The channel estimation matrix is decomposed to derive a unitary matrix and an upper triangular matrix. A precoding matrix is developed using the upper triangular matrix, and the precoding matrix is used to control transmission of a modulated signal.
摘要翻译：一种具有具有第一多个天线的第一收发器装置和具有第二多个天线的第二收发器装置的通信系统的方法和装置确定了描述信号从第一收发器装置行进到前向信道的信道估计矩阵，第二收发器装置。信道估计矩阵被分解以导出酉矩阵和上三角矩阵。使用上三角矩阵开发预编码矩阵，并且预编码矩阵用于控制调制信号的传输。

14. 发明授权

US08005169B1 Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
标题翻译：正交频分复用系统的信道和前导序列的联合估计
公开(公告)号：US08005169B1
公开(公告)日：2011-08-23
申请号：US11725039
申请日：2007-03-16
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04L27/06
CPC分类号： H04L25/022 , H04L25/0224 , H04L27/261
摘要： A system includes an estimation module, a processing module, and a control module. The estimation module receives a signal having N sub-carriers and generates N first estimates for channel gains of the N sub-carriers, where N is an integer greater than 1. The processing module generates N second estimates based on the N first estimates. The control module generates N differences between each of the N first estimates and corresponding ones of the N second estimates and estimates (i) a channel gain of the signal and (ii) a preamble sequence in the signal based on the N differences.
摘要翻译：系统包括估计模块，处理模块和控制模块。估计模块接收具有N个子载波的信号，并产生N个子载波的信道增益的N个第一估计，其中N是大于1的整数。处理模块基于N个第一估计生成N个第二估计。控制模块在N个第一估计和N个第二估计中的相应估计之间产生N个差异，并且基于N个差异估计（i）信号的信道增益和（ii）信号中的前导序列。

15. 发明授权

US07555065B1 Adaptive signal tuning for digital radio receivers operating in FM bands 有权
标题翻译：适用于在FM频段工作的数字无线电接收机的自适应信号调谐
公开(公告)号：US07555065B1
公开(公告)日：2009-06-30
申请号：US12150621
申请日：2008-04-30
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L27/00
CPC分类号： H04L5/143 , H04H20/26 , H04H20/30 , H04H40/18 , H04H60/04 , H04L5/06 , H04L5/14 , H04L27/10 , H04L27/2647
摘要： A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio signal while the hybrid/all digital decoder simultaneously attempts to acquire synchronization. The digital radio receiver outputs the demodulated analog audio signal until synchronization is acquired.
摘要翻译：用于在频率调制（FM）频带中接收模拟信号的无线电接收机包括解码数字音频信号的混合/全数字解码器。模拟FM解调器产生解调的模拟音频信号。模拟FM解调器解调模拟音频信号，而混合/全数字解码器同时尝试获取同步。数字无线电接收机输出解调的模拟音频信号，直到获得同步。

16. 发明授权

US07515657B1 Frequency tracking for OFDM transmission over frequency selective channels 有权
标题翻译：通过频率选择信道进行OFDM传输的频率跟踪
公开(公告)号：US07515657B1
公开(公告)日：2009-04-07
申请号：US10985860
申请日：2004-11-10
申请人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
发明人： Jungwon Lee , Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris
IPC分类号： H04L27/00 , H04L27/06
CPC分类号： H04L27/2657 , H04L27/2679
摘要： A system comprises a receiver module that generates a receiver carrier frequency and that demodulates an orthogonal frequency division multiplexing (OFDM) signal using the receiver carrier frequency. A CFO estimator module communicates with the receiver module and generates a carrier frequency offset (CFO) estimate using an M-th power method and normalizing a magnitude thereof. Another CFO estimator module communicates with the receiver module and generates a carrier frequency offset (CFO) of the OFDM signal using an M-th power method and normalizing a magnitude thereof. The CFO estimator module may be blind. The OFDM signal may also contain pilot subcarriers. The pilot subcarriers may contain known pilot symbols.
摘要翻译：一种系统包括：接收机模块，其生成接收机载波频率，并使用接收机载波频率解调正交频分复用（OFDM）信号。 CFO估计器模块与接收器模块进行通信，并使用M次方法生成载波频率偏移（CFO）估计值并对其幅度进行归一化。另一个CFO估计器模块与接收机模块进行通信，并使用M次方法生成OFDM信号的载波频率偏移（CFO），并对其幅度进行归一化。 CFO估计模块可能是盲目的。 OFDM信号还可以包含导频子载波。导频子载波可以包含已知的导频符号。

17. 发明授权

US07433425B1 Adaptive signal tuning for digital radio receivers operating, in FM bands 有权
标题翻译：适用于在FM频段工作的数字无线电接收机的自适应信号调谐
公开(公告)号：US07433425B1
公开(公告)日：2008-10-07
申请号：US10792194
申请日：2004-03-03
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L27/00
CPC分类号： H04L5/143 , H04H20/26 , H04H20/30 , H04H40/18 , H04H60/04 , H04L5/06 , H04L5/14 , H04L27/10 , H04L27/2647
摘要： A radio receiver for receiving analog signals in a Frequency Modulation (FM) band includes a hybrid/all digital decoder that decodes a digital audio signal. An analog FM demodulator generates a demodulated analog audio signal. The analog FM demodulator demodulates the analog audio signal while the hybrid/all digital decoder simultaneously attempts to acquire synchronization. The digital radio receiver outputs the demodulated analog audio signal until synchronization is acquired.
摘要翻译：用于在频率调制（FM）频带中接收模拟信号的无线电接收机包括解码数字音频信号的混合/全数字解码器。模拟FM解调器产生解调的模拟音频信号。模拟FM解调器解调模拟音频信号，而混合/全数字解码器同时尝试获取同步。数字无线电接收机输出解调的模拟音频信号，直到获得同步。

18. 发明申请

US20070217534A1 Preamble detection with unknown channel 有权
标题翻译：前导码检测与未知信道
公开(公告)号：US20070217534A1
公开(公告)日：2007-09-20
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： H04K1/10
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A system comprises a correlation module that correlates modulated signals with a plurality of preamble sequences and that generates correlation values. A control module selects a largest correlation value from said correlation values and detects one of said preamble sequences in said modulated signals upon determining that a magnitude of said largest correlation value is greater than or equal to a first predetermined threshold.
摘要翻译：一种系统包括相关模块，其将调制信号与多个前同步码序列相关联，并产生相关值。控制模块从所述相关值中选择最大的相关值，并且在确定所述最大相关值的大小大于或等于第一预定阈值时，检测所述调制信号中的所述前同步码序列之一。

19. 发明授权

US08867635B1 Generalized co-phasing for multiple transmitting and receiving antennas 有权
标题翻译：用于多个发射和接收天线的广义同相
公开(公告)号：US08867635B1
公开(公告)日：2014-10-21
申请号：US13323781
申请日：2011-12-12
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。

20. 发明授权

US08774289B1 Soft decoding of coded bit-streams 有权
标题翻译：编码比特流的软解码
公开(公告)号：US08774289B1
公开(公告)日：2014-07-08
申请号：US13355349
申请日：2012-01-20
申请人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
发明人： Hui-Ling Lou , Dimitrios-Alexandros Toumpakaris , Jungwon Lee
IPC分类号： H04L25/00
CPC分类号： H03M7/46 , H04L1/0054 , H04L1/006 , H04L1/0067 , H04L1/0071 , H04L27/34
摘要： A transmitter can include an encoder configured to encode a data sequence based on a first encoding rate to generate a first encoded bit stream having first bits with at least one first repeated bit and encode the data sequence based on a second, different encoding rate to generate a second encoded bit stream having second bits with at least one second repeated bit, where the first and second encoded bit streams each fully represent the data sequence. A receiver can include circuitry configured to produce identified repeated bits by identifying a repeated bit in the first encoded bit stream and a repeated bit in the second encoded bit stream that correspond to a same bit position, combine the first encoded bit stream and the second encoded bit stream including the identified repeated bits to generate a combined bit stream, and decode the combined bit stream.
摘要翻译：发射机可以包括编码器，其被配置为基于第一编码速率对数据序列进行编码，以产生具有至少一个第一重复比特的第一比特的第一编码比特流，并且基于第二不同编码率对该数据序列进行编码以产生第二编码比特流，具有具有至少一个第二重复比特的第二比特，其中第一和第二编码比特流各自完全表示数据序列。接收机可以包括被配置为通过识别第一编码比特流中的重复比特和对应于相同比特位置的第二编码比特流中的重复比特来产生识别的重复比特的电路，组合第一编码比特流和第二编码比特流包括所识别的重复比特以产生组合比特流，并对组合的比特流进行解码。

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