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公开(公告)号：US09712215B1
公开(公告)日：2017-07-18
申请号：US13730367
申请日：2012-12-28
发明人： Jungwon Lee , Rohit U. Nabar , Hui-Ling Lou
IPC分类号： H04B7/04 , H04B7/0408 , H04B1/00
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. 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.
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公开(公告)号：US09407481B1
公开(公告)日：2016-08-02
申请号：US14070712
申请日：2013-11-04
发明人： Vladan Petrovic , Yakun Sun , Jungwon Lee
IPC分类号： H04L27/06
CPC分类号： H04L1/0052 , H04B7/0891 , H04L1/0046 , H04L1/0061 , H04L1/0067 , H04L1/0075 , H04L1/08 , H04L5/0053 , H04L5/0091 , H04L25/03891 , H04L27/06
摘要： Systems and methods for performing efficient blind decoding. A first plurality of decision metrics corresponding to a first repetition of periodic decoding information is stored. The first plurality of decision metrics is grouped into sequential portions. A plurality of combined versions of the sequential portions is stored into combining buffers arranged in sequence. Each combined version is associated with a different sequence of timing information. A first of the plurality of combined versions stored in a first of the combining buffers is combined with a second version of a second plurality of decision metrics that corresponds to a second repetition of the periodic decoding information. The second version is associated with timing information adjacent in the timing information sequence to the timing information associated with the first combined version. The data is decoded based on information in the combining buffers.
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3.发明授权Method and apparatus for estimating a channel quality indicator (CQI) for multiple input multiple output (MIMO) systems 有权用于估计多输入多输出（MIMO）系统的信道质量指示符（CQI）的方法和装置公开(公告)号：US09148207B1
公开(公告)日：2015-09-29
申请号：US14157485
申请日：2014-01-16
发明人： Yakun Sun , Adina Matache , Jungwon Lee
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0632 , H04B7/066 , H04B7/0671 , H04B7/0673 , H04B7/0678 , H04B7/068 , H04B7/0691 , H04B17/336 , H04L1/0026 , H04L1/0029 , H04L1/0036 , H04L1/06 , H04L5/0023
摘要： Systems and methods are provided for determining a channel quality indicator (CQI) in a transmission system associated with a diversity transmission scheme. A plurality of independent diversity branches are identified in the diversity transmission scheme. Each one of the independent diversity branches may correspond to a different portion of the effective channel and may include any suitable combination of frequency, time, and/or spatial components of the effective channel or of any wired or wireless paths or combinations of the same. An effective Signal-to-Noise Ratio (SNR) value is computed for each one of the identified independent diversity branches. The computed effective SNR values are combined for the identified independent diversity branches to generate a CQI value.
摘要翻译： 提供了用于确定与分集传输方案相关联的传输系统中的信道质量指示符（CQI）的系统和方法。 在分集传输方案中识别出多个独立分集分支。 独立分集分支中的每一个可以对应于有效信道的不同部分，并且可以包括有效信道或任何有线或无线路径或其组合的频率，时间和/或空间分量的任何合适的组合。 为所识别的独立分集分支中的每一个计算有效的信噪比（SNR）值。 为所识别的独立分集分支组合计算出的有效SNR值以产生CQI值。
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公开(公告)号：US09065473B1
公开(公告)日：2015-06-23
申请号：US14321442
申请日：2014-07-01
IPC分类号： H03M7/46
CPC分类号： H03M7/46 , H04L1/0054 , H04L1/006 , H04L1/0067 , H04L1/0071 , H04L27/34
摘要： Systems and techniques for decoding are described. A described technique includes receiving coded bit streams that are differently encoded versions of an original bit stream, the coded bit streams including coded bits that are based on the original bit stream, where the coded bit streams have different encoding rates; identifying, within the coded bit streams, repeated coded bits of a coded bit of the coded bits that has been repeated N times; combining the coded bit streams to produce a combined bit stream by at least combining the repeated coded bits into a combined coded bit; determining, without multiplying by a normalization factor that is based on N, a bit metric for the combined coded bit that is a function of N; and decoding the combined bit stream by at least using the bit metric.
摘要翻译： 描述用于解码的系统和技术。 所描述的技术包括接收原始比特流的不同编码版本的编码比特流，编码比特流包括基于原始比特流的编码比特，其中编码比特流具有不同的编码率; 在编码比特流内识别重复N次的编码比特的编码比特的重复编码比特; 通过至少将重复的编码比特组合成组合的编码比特来组合编码比特流以产生组合比特流; 在不相乘基于N的归一化因子的情况下，确定作为N的函数的组合编码比特的比特度量; 以及至少使用所述比特度量对所述组合比特流进行解码。
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公开(公告)号：US09008245B1
公开(公告)日：2015-04-14
申请号：US13712701
申请日：2012-12-12
发明人： Jungwon Lee
CPC分类号： H04B1/10 , H04L25/061 , H04L25/4917 , H04L27/18 , H04L27/2647
摘要： Techniques are provided for detecting a coded signal in the presence of non-Gaussian interference. In an embodiment, a primary transmitter corresponds to a desired transmitter, and one or more secondary transmitters correspond to interfering transmitters. In an embodiment, received symbols, which include non-Gaussian interference and additive noise, are decoded to determine a set of message bits. In an embodiment, an estimate of the set of message bits may be determined using a minimum-distance detector or an optimal-ML detector, for example, depending on the signal-to-noise and/or signal-to-interference ratios at a receiver.
摘要翻译： 提供了用于在存在非高斯干扰的情况下检测编码信号的技术。 在一个实施例中，主发射机对应于期望的发射机，并且一个或多个次发射机对应于干扰发射机。 在一个实施例中，包括非高斯干扰和加性噪声的接收符号被解码以确定一组消息比特。 在一个实施例中，可以使用最小距离检测器或最优ML检测器来确定该组消息比特的估计，例如，取决于在一个或多个信号处理中的信噪比和/或信号干扰比 接收器。
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公开(公告)号：US08937989B1
公开(公告)日：2015-01-20
申请号：US14150706
申请日：2014-01-08
CPC分类号： H04L25/024 , H04L25/022 , H04L25/0228 , H04L27/2601 , H04L27/2657 , H04L2027/003 , H04L2027/0067 , H04L2027/0093
摘要： Systems and methods are provided for channel estimation using linear phase estimation. These systems and methods enable improved channel estimation by estimating a linear channel phase between received pilot subcarrier signals. The estimated linear phase can then be removed from the received pilot subcarrier signals. After the estimated linear phase is removed from the received pilot subcarrier signals, a channel response can be estimated. A final estimated channel response can be generated by multiplying the results of the linear channel estimation by the estimated linear phase.
摘要翻译： 提供了使用线性相位估计的信道估计的系统和方法。 这些系统和方法通过估计接收的导频副载波信号之间的线性信道相位来实现改进的信道估计。 然后可以从接收到的导频子载波信号中去除估计的线性相位。 在从接收到的导频子载波信号中去除估计的线性相位之后，可以估计信道响应。 可以通过将线性信道估计的结果乘以估计的线性相位来生成最终估计的信道响应。
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7.发明授权公开(公告)号：US08848838B1
公开(公告)日：2014-09-30
申请号：US14033063
申请日：2013-09-20
发明人： Jungwon Lee , Hui-Ling Lou
CPC分类号： H04L1/0036 , H04L25/03305 , H04L2025/03726
摘要： Techniques are provided for detecting a coded signal in the presence of interference. In an embodiment, a primary transmitter corresponds to a desired transmitter, and one or more secondary transmitters correspond to interfering transmitters. Received symbols, which include interference and additive noise, are filtered to recover a set of original message bits. An estimate of the set of original message bits may be determined using an ordered successive interference cancellation (SIC) decoder that uses either a SIC detector or an AWGN-based detector, depending on the signal-to-interference ratio at a primary receiver.
摘要翻译： 提供了用于在存在干扰的情况下检测编码信号的技术。 在一个实施例中，主发射机对应于期望的发射机，并且一个或多个次发射机对应于干扰发射机。 接收到的包括干扰和加性噪声的符号被过滤以恢复一组原始消息位。 可以使用使用SIC检测器或基于AWGN的检测器的有序连续干扰消除（SIC）解码器来确定原始消息比特组的估计，这取决于主接收机处的信号干扰比。
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公开(公告)号：US08774301B1
公开(公告)日：2014-07-08
申请号：US13672141
申请日：2012-11-08
发明人： Arul Durai Murugan Palanivelu , Leilei Song , Rohit U. Nabar , Jungwon Lee , Sayandev Mukherjee , Hui-Ling Lou
IPC分类号： H04L23/02
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。
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9.发明授权Method and apparatus for receiving signals in a MIMO system with multiple channel encoders 有权用于在具有多个信道编码器的MIMO系统中接收信号的方法和装置公开(公告)号：US08711989B1
公开(公告)日：2014-04-29
申请号：US13854774
申请日：2013-04-01
发明人： Jungwon Lee , Hui-Ling Lou
IPC分类号： H04B1/66
CPC分类号： H04B7/0413 , H04L1/005 , H04L1/0055 , H04L1/0631 , H04L25/03305 , H04L25/03318 , H04L25/03891
摘要： In a method for decoding plurality of information streams corresponding to a plurality of layers, where the plurality of information streams have been transmitted via a multiple input multiple output (MIMO) communication channel, a plurality of received signals are processed to decode information corresponding to a first layer. A plurality of modified received signals are generated using the decoded information corresponding to the first layer and the plurality of received signals. Bit metric values are generated for a second layer using MIMO maximum likelihood (ML) demodulation and using the plurality of modified received signals and channel and modulation information for interfering signals. Information corresponding to the second layer is decoded using the generated bit metric values.
摘要翻译： 在多重信息流已经通过多输入多输出（MIMO）通信信道被发送的情况下解码与多个层对应的多个信息流的方法中，处理多个接收到的信号以解码对应于 第一层 使用与第一层和多个接收信号相对应的解码信息来生成多个修改的接收信号。 使用MIMO最大似然（ML）解调并使用多个修改的接收信号和用于干扰信号的信道和调制信息为第二层生成比特量度值。 使用生成的比特度量值对与第二层对应的信息进行解码。
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公开(公告)号：US08594222B1
公开(公告)日：2013-11-26
申请号：US13672574
申请日：2012-11-08
发明人： Yakun Sun , Jungwon Lee
IPC分类号： H04B7/02
CPC分类号： H04L25/03343 , H04B7/0456 , H04B7/0639
摘要： Methods and systems are provided for searching for a codeword from a plurality of codewords in a codebook for use in precoding, for example, as used in a multiple-input multiple-output (MIMO) transmission system. Tree search and recursive algorithm techniques may be utilized to reduce the complexity and enhance the efficiency of the codebook search. Distance values may be determined between an optimal codeword and codewords in a codebook. The distance values may be accumulated for a group of the k-best codewords. Additionally or alternatively, a codeword from the codebook may be removed from consideration if the codeword meets a stop rule condition. A codeword may be selected from the codebook based on a minimum distance value from the optimal codeword.
摘要翻译： 提供了用于在码本中的多个码字中搜索用于例如在多输入多输出（MIMO）传输系统中使用的预编码的码字的方法和系统。 可以使用树搜索和递归算法技术来降低码本搜索的复杂性并提高其效率。 可以在码本中的最佳码字和码字之间确定距离值。 可以为一组k个最佳码字群累积距离值。 另外或替代地，如果码字满足停止规则条件，则来自码本的码字可以从考虑中去除。 可以基于来自最佳码字的最小距离值从码本中选择码字。
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