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81. 发明申请

US20090238303A1 METHOD AND SYSTEM FOR CODEBOOK-BASED CLOSED-LOOP MIMO USING COMMON PILOTS AND ANALOG FEEDBACK 有权
标题翻译：使用通用引导和模拟反馈的基于代码库的闭环MIMO的方法和系统
公开(公告)号：US20090238303A1
公开(公告)日：2009-09-24
申请号：US12405307
申请日：2009-03-17
申请人： Bishwarup Mondal , Kevin L. Baum , Amitabha Ghosh , Timothy Thomas , Frederick Vook , Fan Wang
发明人： Bishwarup Mondal , Kevin L. Baum , Amitabha Ghosh , Timothy Thomas , Frederick Vook , Fan Wang
IPC分类号： H04L27/00 , H04L27/06
CPC分类号： H04L5/005 , H04B7/0417 , H04B7/0617 , H04B7/0665 , H04L25/0204 , H04L25/0224 , H04L25/03343 , H04L2025/03414 , H04L2025/03808
摘要： A method and system that enables the usage of sounding-based feedback or analog feedback in a MIMO communication system with non-beamformed or broadcast pilot symbols is disclosed. The mobile station may employ a feedback channel to send a sounding waveform to a base station, a feedforward channel to receive from the base station codebook weights derived from the send sounding waveform, a receiver to receive communication from the base station, and a processor to detect beamformed data from the received communication and received codebook weights from the base station. The base station processes the sounding waveform to determine codebook weights on groups of subcarriers. Additionally, the base station transmits the beamformed payload and broadcast pilots to the mobile station.
摘要翻译：公开了一种能够在具有非波束形成或广播导频符号的MIMO通信系统中使用基于声音的反馈或模拟反馈的方法和系统。移动台可以使用反馈信道向基站发送探测波形，从基站接收来自发送探测波形的码本的前馈信道，从基站接收通信的接收机和处理器检测来自接收到的通信的波束形成的数据和从基站接收的码本权重。基站处理探测波形以确定子载波组上的码本权重。此外，基站将波束形成的有效载荷和广播导频发送到移动台。

82. 发明授权

US06959050B2 Method and apparatus for synchronizing an OFDM signal 有权
标题翻译： OFDM信号同步的方法和装置
公开(公告)号：US06959050B2
公开(公告)日：2005-10-25
申请号：US09882840
申请日：2001-06-15
申请人： Kevin L. Baum , Nikhil S. Nadgauda
发明人： Kevin L. Baum , Nikhil S. Nadgauda
IPC分类号： H04L7/06 , H04L27/00 , H04L27/26 , H04L27/14 , H04L27/06
CPC分类号： H04L27/2662 , H04L7/06 , H04L27/2659 , H04L27/266 , H04L27/2675 , H04L27/2679 , H04L2027/0036
摘要： An apparatus (300) for and method of synchronizing OFDM signals utilizes a single baud to provide synchronization in time, frequency, and per-subcarrier rotation (201). Timing and fractional subcarrier frequency synchronization may be obtained from either a known or unknown (e.g., data symbol) baud having known symmetry properties. Because all three synchronization tasks may be accomplished utilizing a single sync baud, the present invention is spectrally efficient. A differential correlation metric is utilized to efficiently provide integer subcarrier frequency synchronization and per-subcarrier rotation synchronization.
摘要翻译：用于OFDM信号同步的方法和方法利用一个波特率来提供时间，频率和每个副载波的同步（201）。定时和分数子载波频率同步可以从具有已知对称性质的已知或未知（例如，数据符号）波特获得。因为可以使用单个同步波特率来实现所有三个同步任务，所以本发明是光谱效率的。利用差分相关度量来有效地提供整体子载波频率同步和每子载波旋转同步。

83. 发明授权

US5740205A Apparatus and method for maximizing frequency offset tracking performance in a digital receiver 失效
标题翻译：用于使数字接收机中的频偏跟踪性能最大化的装置和方法
公开(公告)号：US5740205A
公开(公告)日：1998-04-14
申请号：US767173
申请日：1996-12-16
申请人： Kevin L. Baum , David Paul Gurney , Stephen Leigh Kuffner
发明人： Kevin L. Baum , David Paul Gurney , Stephen Leigh Kuffner
IPC分类号： H03J7/06 , H04L27/06
CPC分类号： H03J7/065
摘要： An automatic frequency control loop structure utilizes a dual selection automatic frequency control unit which is coupled to a differential phase unit and a coherent phase unit to provide a frequency corrected received signal output for efficient tracking of frequency offset drift; and a much lower probability of loss of automatic frequency control loop lock. Thus, a signal from a coherent carrier recovery process provides additional benefit by utilization in adjusting frequency offset tracking performance.
摘要翻译：自动频率控制环路结构利用双选择自动频率控制单元，其耦合到差分相位单元和相干相位单元，以提供频率校正的接收信号输出，用于有效跟踪频偏漂移; 并且自动频率控制回路锁定的丢失概率要低得多。因此，来自相干载波恢复过程的信号通过利用调整频偏跟踪性能提供额外的益处。

84. 发明授权

US5465412A Apparatus and method for determining a point in time for detecting a sampled signal in a receiver 失效
标题翻译：用于确定在接收机中检测采样信号的时间点的装置和方法
公开(公告)号：US5465412A
公开(公告)日：1995-11-07
申请号：US64182
申请日：1993-05-19
申请人： Bruce D. Mueller , Kevin L. Baum
发明人： Bruce D. Mueller , Kevin L. Baum
IPC分类号： H04L27/00 , H04B1/10 , H04L27/38
CPC分类号： H04B1/10
摘要： In a receiver (101) that receives a signal (103) subsequent to transmission thereof by a transmitter on a communication channel, an apparatus and method for determining a point in time for detecting the signal, sampled at multiple points in time, to produce a detected signal (112). The communication channel is modeled, at the multiple points in time, responsive to the sampled signal (110) to produce signal and noise channel models (209) and (204), respectively. Signal and noise values (210) and (205) indicative of the quantity of signal and noise in the signal and noise channel models, respectively, are generated. A sampling point selector (203) selects, from among the multiple points in time, a point in time (111), corresponding to a determined minimum noise value (206) or a determined maximum signal to noise ratio value (213), for detecting the sampled signal (110) to produce the detected signal (112).
摘要翻译：在接收机（101）中，在由通信信道上的发射机发送信号之后接收信号（103），用于确定用于检测在多个时间点采样的信号的时间点的装置和方法，以产生检测信号（112）。在多个时间点上对通信信道进行建模，响应于采样信号（110）分别产生信号和噪声信道模型（209）和（204）。产生分别指示信号和噪声信道模型中的信号和噪声量的信号和噪声值（210）和（205）。采样点选择器（203）从多个时间点中选择对应于确定的最小噪声值（206）或确定的最大信噪比值（213）的时间点（111），用于检测采样信号（110）以产生检测信号（112）。

85. 发明授权

US5363412A Method and apparatus of adaptive maximum likelihood sequence estimation using filtered correlation synchronization 失效
标题翻译：使用滤波相关同步的自适应最大似然序列估计方法和装置
公开(公告)号：US5363412A
公开(公告)日：1994-11-08
申请号：US998063
申请日：1992-12-28
申请人： Robert T. Love , Gerald P. Labedz , Kevin L. Baum
发明人： Robert T. Love , Gerald P. Labedz , Kevin L. Baum
IPC分类号： H04L27/00 , H03H15/00 , H03H17/00 , H03H21/00 , H03M13/23 , H03M13/41 , H04B1/10 , H04B3/04 , H04B7/005 , H04L1/00 , H04L7/00 , H04L25/03 , H04L27/06 , H03M13/12
CPC分类号： H03M13/6331 , H03M13/41 , H04L25/03178 , H04L2025/03547 , H04L25/03292
摘要： A method and apparatus are provided for maximum likelihood sequence estimation. The method and apparatus includes a first maximum likelihood sequence estimator signal path for flat fading and an at least second maximum likelihood sequence estimator signal path for other than flat fading. The method and apparatus for further includes selecting the signal path with a least relative magnitude mean square error.
摘要翻译：提供了用于最大似然序列估计的方法和装置。该方法和装置包括用于平坦衰落的第一最大似然序列估计器信号路径和除平坦衰落以外的至少第二最大似然序列估计器信号路径。该方法和装置还包括以最小相对幅度均方误差选择信号路径。

86. 发明授权

US5263052A Viterbi equalizer for radio receiver 失效
标题翻译：无线电接收机的维特比均衡器
公开(公告)号：US5263052A
公开(公告)日：1993-11-16
申请号：US767961
申请日：1991-09-30
申请人： David E. Borth , Bruce D. Mueller , Kevin L. Baum
发明人： David E. Borth , Bruce D. Mueller , Kevin L. Baum
IPC分类号： H04L25/08 , H03H15/00 , H03H17/00 , H03H21/00 , H03M13/23 , H04B3/04 , H04L25/03 , H04L27/22 , H04L5/12
CPC分类号： H04L27/22 , H04L25/03203 , H04L2025/03401 , H04L25/03197
摘要： A Viterbi equalizer for decoding a .pi./4 DQPSK modulated signal. Because symbol values of adjacent symbols of a .pi./4 DQPSK signal are offset in phase relative to one another, allowable values of succeeding states of a .pi./4 DQPSK signal are four in number. The signal paths of the Viterbi equalizer are thereby limited in number to four allowable next-states, and the Viterbi equalizer is operative to select certain ones of the paths connecting the states at the adjacent time intervals as survivor paths to form maximum likelihood paths thereby.
摘要翻译：用于对pi / 4 DQPSK调制信号进行解码的维特比均衡器。由于pi / 4 DQPSK信号的相邻符号的符号值相对于彼此相位偏移，因此pi / 4 DQPSK信号的后续状态的允许值为4。因此，维特比均衡器的信号路径被限制为四个允许的下一状态，并且维特比均衡器用于选择将相邻时间间隔处的状态连接的某些路径作为幸存路径，从而形成最大似然路径。

87. 发明授权

US5233632A Communication system receiver apparatus and method for fast carrier acquisition 失效
标题翻译：用于快速载波采集的通信系统接收机装置和方法
公开(公告)号：US5233632A
公开(公告)日：1993-08-03
申请号：US698765
申请日：1991-05-10
申请人： Kevin L. Baum , David E. Borth , Phillip D. Rasky
发明人： Kevin L. Baum , David E. Borth , Phillip D. Rasky
IPC分类号： H04B1/30
CPC分类号： H04B1/30
摘要： A communications system receiver (100) is disclosed which receives a transmitted signal over a radio channel. The transmitted signal includes data and a predetermined synchronization sequence. The receiver (100) includes a demodulator (215), and a stored replica (207) of the predetermined synchronization sequence. The receiver (100) further includes apparatus (102) for computing (308) a reconstructed signal, by using the channel impulse response characteristic and the stored replica (207) of the synchronization sequence. A feature of the invention is to estimate (310) a phase offset value between an incoming signal and the reconstructed signal, for a plurality of synchronization symbols. This serves to establish (315) a relationship between the phase offset and a synchronization symbol index. The receiver then employs this relationship to derive (317) at least one "previous" phase state (214) for initializing (314) the demodulator (215).
摘要翻译：公开了一种通过无线电信道接收发射信号的通信系统接收机（100）。所发送的信号包括数据和预定的同步序列。接收器（100）包括解调器（215）和预定同步序列的存储副本（207）。接收器（100）还包括用于通过使用信道脉冲响应特性和存储的同步序列副本（207）来计算（308）重构信号的装置（102）。本发明的一个特征是针对多个同步符号来估计（310）输入信号和重构信号之间的相位偏移值。这用于建立（315）相位偏移和同步符号索引之间的关系。接收机然后采用这种关系来导出（317）用于初始化（314）解调器（215）的至少一个“先前”相位状态（214）。

88. 发明授权

US09438642B2 Methods for coordinating communications between a plurality of communication devices of a user 有权
标题翻译：用于协调用户的多个通信设备之间的通信的方法
公开(公告)号：US09438642B2
公开(公告)日：2016-09-06
申请号：US13461234
申请日：2012-05-01
申请人： William P. Alberth, Jr. , Kevin L. Baum , Dean E. Thorson
发明人： William P. Alberth, Jr. , Kevin L. Baum , Dean E. Thorson
IPC分类号： G06F15/16 , H04L29/06 , H04W4/02 , H04M3/42 , H04L29/08 , H04W4/20 , G06Q10/10 , H04L12/58
CPC分类号： H04L67/148 , G06Q10/10 , H04L51/14 , H04L51/20 , H04L65/1083 , H04L67/142 , H04L67/303 , H04M3/42263 , H04M3/42374 , H04M2203/2094 , H04W4/02 , H04W4/021 , H04W4/21
摘要： A communication device performs a method for coordinating communications between a plurality of communication devices of a user. The method includes detecting an active communication session on a primary communication device having user engagement, and determining a set of secondary communication devices in proximity to the user. The method further includes detecting an interruption event, at the primary communication device, during the active communication session. Additionally, the method includes determining that a first secondary communication device, in the set of secondary communication devices, has capability to process the interruption event, and transferring the interruption event to the first secondary communication device.
摘要翻译：通信装置执行用于协调用户的多个通信装置之间的通信的方法。该方法包括在具有用户参与的主通信设备上检测活动通信会话，以及确定邻近用户的一组辅助通信设备。该方法还包括在主通信会话期间在主通信设备处检测中断事件。此外，该方法包括确定该二次通信设备组中的第一次要通信设备具有处理该中断事件的能力，以及将该中断事件传送到该第一次要通信设备。

89. 发明申请

US20120144445A1 METHOD AND APPARATUS FOR DISTRIBUTING VIDEO 有权
公开(公告)号：US20120144445A1
公开(公告)日：2012-06-07
申请号：US12959580
申请日：2010-12-03
申请人： Jeffrey D. Bonta , Kevin L. Baum , George Calcev , Benedito J. Fonseca, JR.
发明人： Jeffrey D. Bonta , Kevin L. Baum , George Calcev , Benedito J. Fonseca, JR.
IPC分类号： H04N7/173
CPC分类号： H04N21/6405 , H04L12/1868 , H04L65/1069 , H04L65/4076 , H04L65/602 , H04L65/608 , H04L65/80 , H04L67/02 , H04N21/2187 , H04N21/2358 , H04N21/26258 , H04N21/41407 , H04N21/6131 , H04N21/6375 , H04N21/6408 , H04N21/64784 , H04N21/8456
摘要： A method and apparatus for distributing live video to multiple client devices is provided herein. In particular, a router is provided that acts on behalf of all client devices in its network. The router serves multiple groups of client devices with each group being formed by client devices having similar bandwidth requirements. The router then requests and receives video chunks from a network. The router then redistributes the video chunks to the multiple client devices using a multicast transmission. In particular, to minimize the demands on the core network, the router sets up a separate multicast to each group. Live video, of the appropriate quality is then multicast to each group.

90. 发明申请

US20120030723A1 METHOD AND APPARATUS FOR STREAMING VIDEO 审中-公开
标题翻译：流动视频的方法和装置
公开(公告)号：US20120030723A1
公开(公告)日：2012-02-02
申请号：US12843930
申请日：2010-07-27
申请人： Kevin L. Baum , Jeffrey D. Bonta , George Calcev , Benedito J. Fonseca, JR.
发明人： Kevin L. Baum , Jeffrey D. Bonta , George Calcev , Benedito J. Fonseca, JR.
IPC分类号： H04N7/173
CPC分类号： H04N21/8456 , H04N21/234327 , H04N21/4621 , H04N21/47202
摘要： A method and apparatus for transmitting video is provided herein. A video representation is segmented into video chunks, with each chunk spanning a different time interval. Each chunk may be divided into two or more sub-chunks. During operation, the client requests a sub-chunk of a particular video chunk and then possibly requests an additional sub-chunk of the video chunk. The client then combines and decodes the sub-chunks to provide a reconstructed video chunk for playback on a device. In an embodiment, I-frames of a video chunk are made available in a separate sub-chunk file than P-frames (or B-frames).
摘要翻译：本文提供了一种用于传输视频的方法和装置。视频表示被分割成视频块，每个块跨越不同的时间间隔。每个块可以分为两个或更多个子块。在操作期间，客户端请求特定视频块的子块，然后可能请求视频块的附加子块。然后，客户端组合并解码子块，以提供用于在设备上回放的重构的视频块。在一个实施例中，视频块的I帧在单独的子块文件中比P帧（或B帧）可用。

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