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71. 发明授权

US08099050B1 Digital radio data system receiver methods and apparatus 有权
标题翻译：数字无线电数据系统接收机的方法和装置
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。

72. 发明授权

US08009097B1 Beamforming with partial channel knowledge 有权
标题翻译：具有部分渠道知识的波束成形
公开(公告)号：US08009097B1
公开(公告)日：2011-08-30
申请号：US13030738
申请日：2011-02-18
申请人： Jungwon Lee , Rohit U. Nabar
发明人： Jungwon Lee , Rohit U. Nabar
IPC分类号： H01Q3/00
CPC分类号： H01Q25/00 , H01Q1/246 , H01Q21/06 , H01Q21/293
摘要： A method in a transmitter for selecting steering vectors for simultaneously transmitting a plurality of streams (NS) between the transmitter and a receiver, where the receiver has NR receive antennas, where the transmitter knows respective channels associated with M receive antennas of the receiver, and where M is less than NR, includes constructing a partial channel matrix that describes a multiple input, multiple output (MIMO) channel between the transmitter and the M receive antennas, generating L independent vectors using the partial channel matrix, wherein L is a rank of the partial channel matrix, selecting a respective steering vector for each of the plurality of streams to be transmitted to the receiver, including, if NS is less than or equal to L, selecting NS of the L independent vectors as the steering vectors, and, if NS is greater than L, (i) selecting the L independent vectors as steering vectors to steer L of the plurality of streams; and (ii) selecting NS−L orthogonal vectors in a null space of the L independent vectors.
摘要翻译：一种用于选择用于在发射机和接收机之间同时发射多个流（NS）的导频向量的方法，其中接收机具有NR个接收天线，其中发射机知道与接收机的M个接收天线相关联的各个信道，以及其中M小于NR，包括构建描述发射机和M个接收天线之间的多输入多输出（MIMO）信道的部分信道矩阵，使用部分信道矩阵生成L个独立向量，其中L是部分信道矩阵，选择要发送到接收机的多个流中的每一个的相应导向矢量，如果NS小于或等于L，则选择L个独立向量的NS作为导向矢量，如果NS大于L，（i）选择L个独立向量作为引导多个流的L的导向向量; 和（ii）在L个独立向量的零空间中选择NS-L正交向量。

73. 发明授权

US07970066B1 Tracking automatic gain control of orthogonal frequency domain multiplexing systems 有权
标题翻译：跟踪正交频域复用系统的自动增益控制
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。

74. 发明授权

US07899107B1 Preamble detection using low-complexity cross-correlation 有权
标题翻译：使用低复杂度互相关的前导码检测
公开(公告)号：US07899107B1
公开(公告)日：2011-03-01
申请号：US11732095
申请日：2007-04-02
申请人： Jungwon Lee
发明人： Jungwon Lee
IPC分类号： H04B1/00
CPC分类号： H04L27/2655 , H04L27/2613 , H04L27/2656 , H04L27/2675
摘要： A system includes a differential demodulation module that differentially demodulates modulated signals. A cross-correlation module generates cross-correlation values by cross-correlating states of X symbols in the differentially demodulated signals with corresponding states of X predetermined symbols in each of Y preamble sequences, and determines whether one of the Y preamble sequences is present in the modulated signals, where X and Y are integers greater than 1. The cross-correlation module includes a state detection module that detects the states of the X symbols in the differentially demodulated signals, where each of the X symbols has one of a first state and a second state, and a summing module that generates the cross-correlation values by generating X sums for each of the Y preamble sequences by adding each of the states of the X symbols with the corresponding states of the X predetermined symbols in each of the Y preamble sequences.
摘要翻译：一种系统包括对调制信号进行差分解调的差分解调模块。互相关模块通过将差分解调信号中的X个符号的状态与Y个前同步码序列中的每一个中的X个预定符号的相应状态相互相关的状态产生互相关值，并且确定Y个前同步码序列之一是否存在于调制信号，其中X和Y是大于1的整数。互相关模块包括状态检测模块，其检测差分解调信号中的X个符号的状态，其中每个X符号具有第一状态和第二状态，以及求和模块，其通过将X个符号的每个状态与X个预定符号中的每个的相应状态相加，生成Y个前同步码序列的X个和，生成互相关值前序序列。

75. 发明授权

US07756003B1 Adaptive OFDM transmitter based on carrier frequency offset 有权
标题翻译：基于载波频偏的自适应OFDM发射机
公开(公告)号：US07756003B1
公开(公告)日：2010-07-13
申请号：US10986130
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： H04J11/00 , G01R31/08 , H04J3/16 , H04L27/28 , H04B17/00
CPC分类号： H04L27/2657 , H04B7/01
摘要： A system comprises a transmitter module that receives transmitter data, that includes at least one transmitter operating parameter and that generates an orthogonal frequency division multiplexing (OFDM) signal based on the transmitter data and the at least one transmitter operating parameter. An operating parameters generating module receives a carrier frequency offset (CFO), communicates with the transmitter module and adjusts the at least one transmitter operating parameter based on the CFO. The transmitter module adjusts a parameter of at least one of a channel coding module, a modulating module, and/or a power control module based on the CFO.
摘要翻译：一种系统包括发射机模块，其接收包括至少一个发射机操作参数并且基于发射机数据和至少一个发射机操作参数产生正交频分复用（OFDM）信号的发射机数据。操作参数产生模块接收载波频率偏移（CFO），与发射机模块通信，并且基于CFO调整至少一个发射机操作参数。发射机模块基于CFO调整信道编码模块，调制模块和/或功率控制模块中的至少一个的参数。

76. 发明授权

US07684774B1 Systems and methods for recovery of a sub-carrier signal from a stereophonic multiplexed signal 失效
标题翻译：用于从立体声复用信号中恢复副载波信号的系统和方法
公开(公告)号：US07684774B1
公开(公告)日：2010-03-23
申请号：US11582735
申请日：2006-10-17
申请人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
发明人： Chris Cheng-Chieh Lee , Hui-Ling Lou , Jungwon Lee
IPC分类号： H04B1/06
CPC分类号： H04B1/1653 , H04H40/45
摘要： Disclosed herein are systems and methods for recovering a sub-carrier signal from a multiplexed signal having an embedded pilot tone signal. The recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for generating a frequency-doubled signal from the recovered pilot signal, and for phase-shifting the frequency-doubled signal by a pre-determined phase difference from the embedded pilot tone signal. Another recovery system includes circuitry for recovering a pilot signal from the received multiplexed signal, for phase-shifting the pilot signal by a pre-determined phase difference from the embedded pilot tone signal, and for generating a frequency-doubled signal from the phase-shifted signal.
摘要翻译：这里公开了用于从具有嵌入导频音信号的复用信号中恢复副载波信号的系统和方法。恢复系统包括用于从所接收的多路复用信号中恢复导频信号的电路，用于从恢复的导频信号产生加倍频的信号，并且将加倍频信号与嵌入式导频相移预定的相位差音调信号。另一个恢复系统包括用于从接收到的多路复用信号中恢复导频信号的电路，用于将导频信号与嵌入的导频音信号相位相移预定的相位差，并用于从相移信号。

77. 发明申请

US20100005357A1 Symbol Vector Mapping for Chase-Combining HARQ 有权
标题翻译：追踪组合HARQ的符号向量映射
公开(公告)号：US20100005357A1
公开(公告)日：2010-01-07
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： H04L1/18 , H04L27/28 , G06F11/14
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 die 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载荷，使得所述发送模具第二数据单元包括经由所述多个符号经由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。

78. 发明授权

US07636297B1 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：US07636297B1
公开(公告)日：2009-12-22
申请号：US11204069
申请日：2005-08-15
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 (PHY) module includes NT radio frequency (RF) channels and a mapping module. The NT RF channels each include N subcarriers. The mapping module includes Ns inputs receiving corresponding ones of NS data streams. The mapping module further includes NT outputs communicating with corresponding ones of the NT RF channels. Each of the NT outputs includes N outputs. The mapping module further includes a mapping matrix that maps the NS data streams to the NT outputs. NT, NS, and N are integers greater than or equal to 2. The NT RF channels include NT gain modules that apply NT different complex gains to the NT outputs, respectively. One of the NT different complex gains is applied to each of the N outputs of a corresponding one of the NT outputs. The NT different complex gains correspond to NT transmit antennas of the NT RF channels, respectively.
摘要翻译：物理层（PHY）模块包括NT射频（RF）信道和映射模块。 NT个RF信道各自包括N个子载波。映射模块包括接收对应的NS数据流的Ns个输入。映射模块还包括与相应的NT RF信道通信的NT个输出。每个NT输出包括N个输出。映射模块还包括将NS数据流映射到NT个输出的映射矩阵。 NT，NS和N是大于或等于2的整数.NT RF信道包括分别向NT个输出应用NT个不同复合增益的NT增益模块。 NT个不同的复数增益之一被应用于NT个输出中对应的一个的N个输出中的每一个。 NT个不同的复数增益分别对应于NT个RF信道的NT个发射天线。

79. 发明申请

US20090282311A1 SYMBOL VECTOR-LEVEL COMBINING RECEIVER FOR INCREMENTAL REDUNDANCY HARQ WITH MIMO 有权
标题翻译：带有MIMO的增量冗余HARQ的符号矢量级组合接收机
公开(公告)号：US20090282311A1
公开(公告)日：2009-11-12
申请号：US12463025
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： H04L1/18 , H04L27/06
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。

80. 发明申请

US20080063103A1 DECODING METHOD FOR ALAMOUTI SCHEME WITH HARQ AND/OR REPETITION CODING 有权
标题翻译：使用HARQ和/或重复编码的ALAMOUTI方案的解码方法
公开(公告)号：US20080063103A1
公开(公告)日：2008-03-13
申请号：US11854219
申请日：2007-09-12
申请人： Jungwon Lee , Woong Jun Jang
发明人： Jungwon Lee , Woong Jun Jang
IPC分类号： H04L23/02
CPC分类号： H04L1/0668 , H04L1/0631 , H04L1/1819
摘要： Systems and methods are provided for decoding a signal vector in a transmission scheme that uses transmit diversity as well as HARQ, repetition coding, or any other protocol that allows a receiver to obtain multiple reception of common transmit information. Information obtained in more than one symbol period are treated as a single received vector, and each of the received signal vectors may be processed to reduce or remove phase rotations caused by the channel. The received signal vectors may be combined by addition and decoded using a maximum-likelihood decoder. In some embodiments, the transmitter and receiver are configured to communicate using the transmit diversity scheme and a spatial multiplexing scheme. The scheme may be chosen based on the quality of the channel through which communication takes place.
摘要翻译：提供的系统和方法用于在使用发射分集以及HARQ，重复编码或允许接收机获得多个公共发送信息的接收的任何其他协议的传输方案中对信号向量进行解码。在多于一个符号周期中获得的信息被视为单个接收向量，并且可以处理每个接收信号向量以减少或消除由该信道引起的相位旋转。接收的信号矢量可以通过加法组合，并使用最大似然解码器解码。在一些实施例中，发射机和接收机被配置为使用发射分集方案和空间复用方案进行通信。该方案可以基于通信进行通道的质量来选择。

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