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51. 发明申请

US20080025443A1 SYMBOL-LEVEL COMBINING FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING 有权
标题翻译：用于具有HARQ和/或重复编码的MIMO系统的符号级组合
公开(公告)号：US20080025443A1
公开(公告)日：2008-01-31
申请号：US11781200
申请日：2007-07-20
申请人： Jungwon Lee , Woong Jun Jang , Leilei Song
发明人： Jungwon Lee , Woong Jun Jang , Leilei Song
IPC分类号： H04B7/10
CPC分类号： H04B7/0857
摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum-likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and/or postprocessors.
摘要翻译：提供了用于对多输入多输出（MIMO）系统中的信号矢量进行解码的系统和方法，其中接收机已经从相同的传输矢量接收了一个或多个信号矢量。组合接收信号矢量的符号，形成可被视为单个接收信号矢量的组合接收信号矢量。然后使用最大似然解码器对组合的信号矢量进行解码。在一些实施例中，组合的接收信号矢量可以在解码之前被处理。还提供了用于基于解码度量从组合信号向量计算软信息的系统和方法。可以从关键路径提取计算密集型计算，并在预处理器和/或后处理器中实现。

52. 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。

53. 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。

54. 发明授权

US08706120B2 Mobile telecommunication system with adaptive handoff mechanism and method of operation thereof 有权
标题翻译：具有自适应切换机制的移动电信系统及其操作方法
公开(公告)号：US08706120B2
公开(公告)日：2014-04-22
申请号：US13324988
申请日：2011-12-13
申请人： Insoo Hwang , Jungwon Lee , Heejin Roh , Inyup Kang
发明人： Insoo Hwang , Jungwon Lee , Heejin Roh , Inyup Kang
IPC分类号： H04W4/00 , H04W36/00
CPC分类号： H04W36/245
摘要： A method of operation of a mobile telecommunication system includes: measuring a measured target power and a measured server power; predicting a future target power and a future server power for a prediction tap number from when the measured target power and the measured server power are measured; computing an estimation error and a prediction error associated with the future target power and the future server power; determining a handoff hysteresis level based on the estimation error and the prediction error; and sending a handoff trigger for transferring a mobile station from a server station to a target station when the future target power minus both the future server power and the handoff hysteresis level is greater than zero.
摘要翻译：一种移动通信系统的操作方法包括：测量测量的目标功率和测量的服务器功率; 从测量的目标功率和测量的服务器功率测量起，预测未来目标功率和未来服务器功率的预测抽头数; 计算与未来目标功率和未来服务器功率相关联的估计误差和预测误差; 基于估计误差和预测误差确定越区切换滞后水平; 以及当将来的目标功率减去未来的服务器功率和切换滞后水平都大于零时，发送用于将移动站从服务器站传送到目标站的切换触发。

55. 发明授权

US08699592B1 Systems and methods for estimating decoder noise power in OFDM systems 有权
标题翻译： OFDM系统中解码器噪声功率估计的系统和方法
公开(公告)号：US08699592B1
公开(公告)日：2014-04-15
申请号：US13157917
申请日：2011-06-10
申请人： Jiwoong Choi , Yakun Sun , Jungwon Lee , Jianyi Huang
发明人： Jiwoong Choi , Yakun Sun , Jungwon Lee , Jianyi Huang
IPC分类号： H04K1/10
CPC分类号： H04B7/0413 , H04L1/0036 , H04L25/0202 , H04L25/0204 , H04L27/2647
摘要： Systems and methods for computing a decoder noise power estimate are provided. A pilot signal transmitted through a fading channel from a wireless transmission source is received. Signal power of the received pilot signal, channel noise power, and channel estimation error are computed. The decoder noise power estimate is determined based on the computed signal power, channel noise power, and channel estimation error.
摘要翻译：提供了用于计算解码器噪声功率估计的系统和方法。接收通过衰落信道从无线发送源发送的导频信号。计算接收到的导频信号的信号功率，信道噪声功率和信道估计误差。基于所计算的信号功率，信道噪声功率和信道估计误差来确定解码器噪声功率估计。

56. 发明授权

US08654902B2 BICM decoding in the presence of co-channel interference 有权
标题翻译：在存在同频道干扰的情况下进行BICM解码
公开(公告)号：US08654902B2
公开(公告)日：2014-02-18
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
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）。

57. 发明授权

US08595578B1 Significance of retransmission used in subsequent decoding 有权
标题翻译：在后续解码中使用重传的意义
公开(公告)号：US08595578B1
公开(公告)日：2013-11-26
申请号：US12940784
申请日：2010-11-05
申请人： Jungwon Lee , Jiwoong Choi
发明人： Jungwon Lee , Jiwoong Choi
IPC分类号： H04L1/18
CPC分类号： H04L1/1845 , G06F11/1004 , H04L1/1816 , H04L1/1819
摘要： Systems and techniques relating to wireless communications are described. A described technique includes receiving signals representing wireless data transmissions that are based on a symbol, the received signals including one or more first signals and a second signal, where a decoded version of the one or more first signals previously failed to successfully resolve the symbol. The second signal can be transmitted in response to the one or more first signals failing to successfully resolve the symbol. The technique includes determining the symbol based on the received signals, where the determining places more significance to the second signal than the one or more first signals.
摘要翻译：描述与无线通信相关的系统和技术。所描述的技术包括接收表示基于符号的无线数据传输的信号，所接收的信号包括一个或多个第一信号和第二信号，其中一个或多个第一信号的解码版本先前未成功地解析该符号。可以响应于一个或多个第一信号不能成功解析符号而发送第二信号。该技术包括基于接收到的信号确定符号，其中确定比第一信号比第二信号更有意义。

58. 发明授权

US08488698B1 Frame synchronization method and apparatus 有权
标题翻译：帧同步方法和装置
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
IPC分类号： H04K1/10 , H04L27/28
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。

59. 发明授权

US08428161B2 Symbol vector mapping for chase-combining HARQ 有权
标题翻译：用于追踪合并HARQ的符号向量映射
公开(公告)号：US08428161B2
公开(公告)日：2013-04-23
申请号：US12488240
申请日：2009-06-19
申请人： Yakun Sun , Jungwon Lee
发明人： Yakun Sun , Jungwon Lee
IPC分类号： H04K1/00
CPC分类号： H04L1/1812 , H04B7/0413 , H04B7/0669 , H04L1/0001 , H04L1/0618 , H04L1/0625 , H04L1/1816 , H04L1/1822 , H04L1/1825 , H04L1/189 , H04L1/1893 , H04L1/1896 , H04L27/2601 , H04L27/2602 , H04L27/2608
摘要： A method of transmitting data from a transmitter to a receiver includes transmitting a first data unit to the receiver via a plurality of antennas, the first data unit including a payload that has a plurality of symbols; determining whether the receiver has successfully received the first data unit; and, in response to determining that the receiver has not successfully received the first data unit, transmitting a second data unit to the receiver, the second data unit including the payload, such that transmitting the second data unit includes transmitting the plurality of symbols via at least one of different antennas and different subcarriers with respect to the first data unit.
摘要翻译：从发射机向接收机发送数据的方法包括经由多个天线向接收机发送第一数据单元，第一数据单元包括具有多个符号的有效载荷; 确定接收机是否已成功接收到第一数据单元; 并且响应于确定所述接收机尚未成功接收到所述第一数据单元，向所述接收机发送第二数据单元，所述第二数据单元包括所述有效负载，使得发送所述第二数据单元包括经由所述第二数据单元至少一个不同的天线和相对于第一数据单元的不同子载波。

60. 发明授权

US08411806B1 Method and apparatus for receiving signals in a MIMO system with multiple channel encoders 有权
公开(公告)号：US08411806B1
公开(公告)日：2013-04-02
申请号：US12543363
申请日：2009-08-18
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： 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.

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