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71. 发明申请

US20120148000A1 BICM DECODING IN THE PRESENCE OF CO-CHANNEL INTERFERENCE 有权
标题翻译： BICM解码存在共通道干扰
公开(公告)号：US20120148000A1
公开(公告)日：2012-06-14
申请号：US13402381
申请日：2012-02-22
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： H04L27/06 , H04L25/08
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）。

72. 发明授权

US08130858B1 Method and apparatus for implementing transmit diversity in OFDM systems 有权
标题翻译：在OFDM系统中实现发射分集的方法和装置
公开(公告)号：US08130858B1
公开(公告)日：2012-03-06
申请号：US12129473
申请日：2008-05-29
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit U. Nabar , Yakun Sun
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou , Rohit U. Nabar , Yakun Sun
IPC分类号： H04B7/02
CPC分类号： H04L27/2627 , H04B7/0413 , H04B7/0669 , H04B7/0671 , H04L1/0625 , H04L5/0023 , H04L5/0087 , H04L25/0204 , H04L25/03159 , H04L2025/03414 , H04L2025/03426
摘要： A plurality of phases are determined. The plurality of phases are to be applied to a plurality of transmit signals to be transmitted via a plurality of transmit antennas. Each transmit signal comprises a plurality of sub-carriers. Each phase of the plurality of phases is to be applied to a corresponding block of sub carriers in the plurality of transmit signals, and each block of sub-carriers comprises a plurality of sub-carriers that are adjacent in frequency. The plurality of phases are applied to the plurality of transmit signals to implement transmit diversity. Each phase is applied to the corresponding block of sub carriers in the plurality of transmit signals.
摘要翻译：确定多个阶段。多个相位应用于要经由多个发射天线发射的多个发射信号。每个发射信号包括多个子载波。将多个相位的每个相位施加到多个发射信号中的相应的子载波块，并且每个子载波块包括在频率上相邻的多个子载波。多个相位被施加到多个发射信号以实现发射分集。每个相位被施加到多个发射信号中的相应的子载波块。

73. 发明授权

US08031784B2 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：US08031784B2
公开(公告)日：2011-10-04
申请号：US11648735
申请日：2006-12-29
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04K1/00
CPC分类号： H04L27/2656 , H04L5/023 , H04L27/2662 , H04L27/2676
摘要： A system includes a differential demodulation module that differentially demodulates modulated signals to generate differentially demodulated signals. A correlation module correlates the differentially demodulated signals with derived preamble sequences and generates correlation values. The derived preamble sequences are derived from preamble sequences. One of the derived preamble sequences is generated by combining bits of one of the preamble sequences using an exclusive OR function. Each bit of one of the derived preamble sequences has a first state when a corresponding bit and a bit adjacent to the corresponding bit in a corresponding one of the preamble sequences have opposite states. The each bit has a second state when the corresponding bit and the bit adjacent to the corresponding bit have the same state.
摘要翻译：一种系统包括对差分解调模块进行差分解调以产生差分解调信号的差分解调模块。相关模块将差分解调信号与导出的前同步码序列进行相关，并产生相关值。导出的前导码序列是从前导序列中导出的。通过使用异或功能组合前导序列之一的比特来生成派生的前导码序列之一。当相应的一个前同步码序列中的相应位相邻的相应位和位相反时，所导出的前同步码序列之一的每个位具有第一状态。当对应的位和与相应位相邻的位具有相同的状态时，每个位具有第二状态。

74. 发明授权

US07872962B1 System and method for producing weighted signals in a diversity communication system 有权
标题翻译：用于在分集通信系统中产生加权信号的系统和方法
公开(公告)号：US07872962B1
公开(公告)日：2011-01-18
申请号：US11447762
申请日：2006-06-05
申请人： Rohit Nabar , Kedar Shirali , Hui-Ling Lou , Jungwon Lee
发明人： Rohit Nabar , Kedar Shirali , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04J11/00
CPC分类号： H04B7/084 , H04B7/0615 , H04B7/0845 , H04B2201/70706 , H04L25/0232 , H04L27/0014
摘要： The disclosed technology relates to a communication system and method in which multiple versions of a signal are processed to detect the signal. The communication system can include transmitters that communicate different versions of a signal to a receiver. The different versions are weighted versions of the signal and are communicated on different channels. The weight for a weighted signal is based on an inverse of an estimate of the phase shift of the particular channel to which the weighted signal will be communicated. The weights are also based on a unity gain such that each weighted signal has the same magnitude as the original signal. A receiver that receives the weighted signals processes the received signals to detect the original signal.
摘要翻译：所公开的技术涉及其中处理多个版本的信号以检测信号的通信系统和方法。通信系统可以包括将信号的不同版本传送到接收机的发射机。不同的版本是信号的加权版本，并且在不同的信道上进行通信。加权信号的权重基于加权信号将被传送到的特定信道的相移的估计的倒数。权重也基于单位增益，使得每个加权信号具有与原始信号相同的幅度。接收加权信号的接收机处理接收的信号以检测原始信号。

75. 发明申请

US20090279633A1 SYMBOL VECTOR-LEVEL COMBINING TRANSMITTER FOR INCREMENTAL REDUNDANCY HARQ WITH MIMO 有权
标题翻译：用于具有MIMO的增量冗余HARQ的符号矢量级组合发射机
公开(公告)号：US20090279633A1
公开(公告)日：2009-11-12
申请号：US12463017
申请日：2009-05-08
申请人： Jungwon Lee , Yakun Sun , Hui-Ling Lou
发明人： Jungwon Lee , Yakun Sun , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04B7/024 , H04B7/0413 , H04L1/0042 , H04L1/0068 , H04L1/0643 , H04L1/1819
摘要： Techniques are provided for transmitting and receiving a mother code in an incremental redundancy hybrid automatic repeat-request protocol. A set of information bits corresponding to a message may be encoded and interleaved to produce the mother code. Each bit position of the mother code may be mapped to an output symbol, and each output symbol may be mapped to an antenna for transmission. One or more transmissions of symbols contained in the output symbols may be performed, where each transmission may include puncturing the mother code by selecting one or more symbols from the of output symbols, and transmitting each symbol in the one or more symbols on an antenna corresponding to that symbol. The mother code may be decoded, in part, by determining combinable bits contained within a set of received symbols, and computing one or more log-likelihood ratio values corresponding to each symbol in the set of received symbols.
摘要翻译：提供了用于以增量冗余混合自动重复请求协议发送和接收母码的技术。对应于消息的一组信息位可以被编码和交织以产生母码。母码的每个比特位置可以被映射到输出符号，并且每个输出符号可以被映射到天线以进行传输。可以执行输出符号中包含的符号的一个或多个传输，其中每个传输可以包括通过从输出符号中选择一个或多个符号来对母码进行穿刺，并且在天线上的一个或多个符号中发送每个符号到那个符号。可以部分地通过确定包含在一组接收到的符号内的可组合比特，以及计算与所接收的符号集合中的每个符号相对应的一个或多个对数似然比值来对母码进行解码。

76. 发明授权

US08996066B1 Methods and apparatus for directing a beam towards a device in the presence of interference 有权
标题翻译：用于在存在干扰的情况下将光束引向设备的方法和装置
公开(公告)号：US08996066B1
公开(公告)日：2015-03-31
申请号：US12363047
申请日：2009-01-30
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04W16/28
CPC分类号： H04B7/0617 , H04B7/0626 , H04L25/0204 , H04L25/021 , H04L25/0244 , H04W16/28 , H04W72/046 , H04W72/082
摘要： Methods and apparatus are provided for directing a beam towards a receiving device in the presence of interference. A beam transmitted by a transmission source is received by a received device. The beam shape is affected by signals transmitted by interfering sources. The receiving device computes channel estimates associated with the transmission source and the interfering sources. A feedback signal that represents the channel estimates associated with the transmission and interfering sources is transmitted to the transmission source. The transmission source changes characteristics of the beam to compensate for the interference caused by the interfering sources. The transmission source may change the characteristics of the beam by performing precoding algorithms.
摘要翻译：提供了用于在存在干扰的情况下将光束引向接收装置的方法和装置。由发送源发送的波束由接收的设备接收。光束形状受干扰源发射的信号的影响。接收设备计算与传输源和干扰源相关联的信道估计。表示与传输和干扰源相关联的信道估计的反馈信号被传送到传输源。传输源改变光束的特性以补偿由干扰源造成的干扰。传输源可以通过执行预编码算法来改变波束的特性。

77. 发明授权

US08730789B1 Transmit diversity technique based on channel randomization for OFDM systems 有权
标题翻译：基于OFDM系统的信道随机化的发射分集技术
公开(公告)号：US08730789B1
公开(公告)日：2014-05-20
申请号：US13278893
申请日：2011-10-21
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04J11/00
CPC分类号： H04J11/0063 , H04B7/0413 , H04B7/0456 , H04B7/0615 , H04B7/0885 , H04L1/0606 , H04L27/2626 , H04L27/2647
摘要： A physical layer module includes a mapping module and a plurality of gain modules. The mapping module maps a plurality of coded data streams to a plurality of transmit antennas, in which each transmit antenna is associated with a respective radio frequency channel of a plurality of radio frequency channels. Each gain module is associated with a respective radio frequency channel of the plurality of radio frequency channels, and is configured to apply a complex gain to the coded data stream mapped to the respective radio frequency channel associated with the gain module. The complex gain applied by the gain module differs relative to that applied by other gain modules, and corresponds to the transmit antenna associated with the respective radio frequency channel.
摘要翻译：物理层模块包括映射模块和多个增益模块。映射模块将多个编码数据流映射到多个发射天线，其中每个发射天线与多个射频信道的相应射频信道相关联。每个增益模块与多个射频信道的相应射频信道相关联，并且被配置为对映射到与增益模块相关联的相应射频信道的编码数据流应用复增益。由增益模块应用的复合增益与其他增益模块所应用的复合增益不同，并且对应于与各个射频信道相关联的发射天线。

78. 发明授权

US08498195B1 HARQ retransmission scheme for at least two transmit antennas 有权
标题翻译：用于至少两个发射天线的HARQ重传方案
公开(公告)号：US08498195B1
公开(公告)日：2013-07-30
申请号：US12059945
申请日：2008-03-31
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04J11/00
CPC分类号： H04B7/0623 , H04L1/0643 , H04L1/1812 , H04L1/1893
摘要： Systems and methods are provided for employing a HARQ retransmission scheme in a time invariant MIMO transmission channel with two inputs. During odd-numbered transmission attempts of information bearing signal s, the original signal s is sent. During even-numbered transmission attempts, a signal {hacek over (s)} that is different from but represents the same information as s is sent. By alternating between two different signals during retransmission, diversity gain is introduced. Information bearing signals s and {hacek over (s)} may also be subjected to precoding before transmission. The result of precoding is a channel that effectively changes with time. A receiver that operates using this retransmission scheme may use the information from some or all of the transmission attempts. The receiver may include a pre-processor for space-time codes that effectively converts {hacek over (s)} into an s representation.
摘要翻译：提供了在具有两个输入的时不变MIMO传输信道中采用HARQ重传方案的系统和方法。在信号承载信号s的奇数传输尝试期间，发送原始信号s。在偶数传输尝试期间，发送不同于但表示与s相同信息的信号{hacek over（s）}。通过在重传期间在两个不同的信号之间交替，引入分集增益。信息承载信号s和{hacek over（s）}也可以在传输之前进行预编码。预编码的结果是随时间有效变化的通道。使用该重传方案操作的接收机可以使用来自部分或全部传输尝试的信息。接收机可以包括用于将{hacek over（s）}有效地转换为s表示的时空码的预处理器。

79. 发明授权

US08331475B1 Low complexity technique for log-likelihood ratio computation 有权
标题翻译：对数似然比计算的低复杂度技术
公开(公告)号：US08331475B1
公开(公告)日：2012-12-11
申请号：US12406587
申请日：2009-03-18
申请人： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
发明人： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
IPC分类号： H04B7/02 , H04L27/28
CPC分类号： H04B7/0413 , H04L25/03242 , H04L25/03961 , H04L25/067 , H04L2025/03414 , H04L2025/0342
摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.
摘要翻译：用于检测多输入/多输出信号中的数据的系统和方法。该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。计算接收到的第二信号与每个可能的第二数据值之间的距离值。计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。基于确定的距离值来确定对数似然比。

80. 发明授权

US08164521B2 Pseudo-omni-directional beamforming with multiple narrow-band beams 有权
标题翻译：具有多个窄带波束的伪全向波束成形
公开(公告)号：US08164521B2
公开(公告)日：2012-04-24
申请号：US12197527
申请日：2008-08-25
申请人： Jungwon Lee , Hui-Ling Lou
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： G01S1/08
CPC分类号： H04W24/10 , H04B7/0408 , H04B7/0617 , H04B7/0632 , H04W16/28
摘要： In a technique for communication with a station on a wireless network, the technique includes forming a plurality of narrow-band beams, each having a different angular direction from an antenna of a base station and collectively distributed over a beamspace to form a pseudo-omni-directional beam pattern. That beamspace may span an entire spherical region or a portion thereof, for example, when the narrow-band beams are broadcast over a sector of an entire spherical region. The technique may assign each of the plurality of narrow-band beams to a different frequency band (such as a different channel band or sub-channel) on the wireless network. The technique may simultaneously broadcast the plurality of narrow-band beams in a time-varying manner such that the angular direction of each of the plurality of narrow-band beams varies with time, where that variation may be random or ordered.
摘要翻译：在用于与无线网络上的站通信的技术中，该技术包括形成多个窄带波束，每个窄带波束具有与基站的天线不同的角度方向，并且共同分布在波束空间上以形成伪全波段方向光束图案。该波束空间可以跨越整个球形区域或其一部分，例如当窄带波束在整个球形区域的扇区上广播时。该技术可以将多个窄带波束中的每一个分配给无线网络上的不同频带（例如，不同的信道频带或子信道）。该技术可以以时变方式同时广播多个窄带波束，使得多个窄带波束中的每一个的角度方向随时间变化，其中该变化可以是随机的或有序的。

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