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41. 发明授权

US08407043B2 Computationally efficient audio coder 有权
标题翻译：计算效率高的音频编码器
公开(公告)号：US08407043B2
公开(公告)日：2013-03-26
申请号：US13047604
申请日：2011-03-14
申请人： K. P. P. Kalyan Chakravarthy , Navaneetha K. Ruthramoorthy , Pushkar P. Patwardhan , Bishwarup Mondal
发明人： K. P. P. Kalyan Chakravarthy , Navaneetha K. Ruthramoorthy , Pushkar P. Patwardhan , Bishwarup Mondal
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10L19/002 , G10L19/008 , G10L19/02 , G10L19/025 , H04L1/0039 , H04L25/0262
摘要： The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.
摘要翻译：本发明提供了一种用于音频信号的压缩编码的计算上有效的技术，并且还提供了一种用于增强编码音频信号的声音质量的技术。这通过包括更准确的攻击检测和计算有效的量化技术来实现。改进的音频编码器将输入音频信号转换成数字音频信号。然后，音频编码器将数字音频信号分成具有长块帧长度的较大帧，并且将每个帧划分成多个短块。然后，音频编码器基于输入音频信号的变化来计算每个分割的短块的短块音频信号特性。音频编码器进一步将计算出的短块特性与一组阈值进行比较，以检测每个短块中的攻击的存在，并且在检测到攻击中改变一个或多个短块的长块帧长度相应的一个或多个短块。

42. 发明授权

US08391173B2 Method and apparatus for radio resource allocation in an orthogonal frequency division multiplexing communication system 有权
标题翻译：正交频分复用通信系统中无线资源分配的方法和装置
公开(公告)号：US08391173B2
公开(公告)日：2013-03-05
申请号：US12776499
申请日：2010-05-10
申请人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
发明人： Mark C. Cudak , Amitabha Ghosh , William J. Hillery , Bishwarup Mondal , Anup K. Talukdar , Eugene Visotsky , Frederick W. Vook , Fan Wang
IPC分类号： H04W4/00
CPC分类号： H04W16/02 , H04L5/0007 , H04L5/0023 , H04L5/0039 , H04L5/0041 , H04L5/0094 , H04W28/16
摘要： In an OFDM communication system, wherein a frequency bandwidth is divided into multiple Physical Resource Units (PRUs), a Frequency Partitioning Configuration Module (FPCM) is provided that configures a physical layer for use in multiple coverage areas. The FPCM divides the PRUs into a first group, for frequency selective allocations, and a second group, for frequency diverse allocations. The FPCM subdivides each of the two groups into multiple sets of PRUs, maps the sets of PRUs from the first group to consecutive PRUs allocated for contiguous segment allocation (CS-PRUs), and maps the sets of PRUs from the second group to consecutive PRUs allocated for distributed segment allocation (DS-PRUs). The FPCM permutes the DS-PRUs and allocates the CS-PRUs and the permuted DS-PRUs to at least one frequency partition.
摘要翻译：在其中将频率带宽划分为多个物理资源单元（PRU）的OFDM通信系统中，提供了配置用于多个覆盖区域的物理层的频率分配配置模块（FPCM）。 FPCM将PRU划分为第一组，用于频率选择性分配，第二组用于频率不同的分配。 FPCM将两组中的每一个细分为多组PRU，将来自第一组的PRU集合映射到为连续分段分配（CS-PRU）分配的连续PRU，并将来自第二组的PRU集合映射到连续PRU 分配给分布式分段分配（DS-PRU）。 FPCM将DS-PRU置换并将CS-PRU和置换的DS-PRU分配给至少一个频率分区。

43. 发明授权

US08204014B2 Method and system for codebook-based closed-loop MIMO using common pilots and analog feedback 有权
标题翻译：使用公共导频和模拟反馈的基于码本的闭环MIMO的方法和系统
公开(公告)号：US08204014B2
公开(公告)日：2012-06-19
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： H04W4/00 , H04L1/00 , H04L12/26
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。

44. 发明申请

US20110176439A1 CLOSED-LOOP FEEDBACK IN WIRELESS COMMUNICATIONS SYSTEM 有权
标题翻译：无线通信系统中的闭环反馈
公开(公告)号：US20110176439A1
公开(公告)日：2011-07-21
申请号：US12958544
申请日：2010-12-02
申请人： Bishwarup Mondal , Timothy A. Thomas
发明人： Bishwarup Mondal , Timothy A. Thomas
IPC分类号： H04L12/26 , H04W4/00
CPC分类号： H04L25/03343 , H04L5/0007 , H04L25/0204 , H04L25/0391
摘要： A method and apparatus for providing channel feedback is provided herein. During operation a covariance matrix at time t (R) is calculated as a function of a received downlink signal. In order to reduce overhead, R is normalized and quantized. The base unit then uses the covariance matrix estimate to determine appropriate channel beamforming weights, and instructs transmit beamforming circuitry to use the appropriate weights. In an embodiment, circuitry performs a method of calculating a first precoding matrix index I from a codebook using a received signal, calculating a second codebook index J* using the first precoding matrix index I to approximate a covariance matrix and calculating a quantized coefficient α* to approximate the covariance matrix wherein the quantized coefficient α* is determined using the first precoding matrix index I.
摘要翻译：本文提供了一种用于提供信道反馈的方法和装置。在运行期间，计算时间t（R）处的协方差矩阵作为接收的下行链路信号的函数。为了减少开销，R被归一化和量化。基本单元然后使用协方差矩阵估计来确定适当的信道波束成形权重，并且指示发送波束成形电路使用适当的权重。在一个实施例中，电路执行使用接收信号从码本计算第一预编码矩阵索引I的方法，使用第一预编码矩阵索引I来计算第二码本索引J *以近似协方差矩阵并计算量化系数α* 近似协方差矩阵，其中使用第一预编码矩阵索引I确定量化系数α*

45. 发明授权

US07778343B2 Method and apparatus for finite impulse response cyclic-shift diversity 有权
标题翻译：有限脉冲响应循环移位分集的方法和装置
公开(公告)号：US07778343B2
公开(公告)日：2010-08-17
申请号：US11627563
申请日：2007-01-26
申请人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
发明人： William J. Hillery , Thomas P. Krauss , Bishwarup Mondal , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04B7/02 , H04L1/02
CPC分类号： H04L5/0007 , H04B7/0671
摘要： A generalized form of cyclic shift diversity is described for use in an OFDM system with multiple transmit antennas. Multiple cyclic shifts are performed for each transmit antenna and the shifted signals are scaled and summed to form a time-domain data stream for each transmit antenna. A cyclic extension is added to each data stream prior to transmission.
摘要翻译：描述了在具有多个发射天线的OFDM系统中使用的循环移位分集的通用形式。对于每个发射天线执行多个循环移位，并且移位的信号被缩放和相加以形成每个发射天线的时域数据流。在传输之前，将循环扩展添加到每个数据流。

46. 发明申请

US20100150266A1 METHOD AND APPARATUS FOR CODEBOOK-BASED FEEDBACK IN A CLOSED LOOP WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：封闭式无线通信系统中基于代码的反馈的方法与装置
公开(公告)号：US20100150266A1
公开(公告)日：2010-06-17
申请号：US12334917
申请日：2008-12-15
申请人： Bishwarup Mondal , Amitabha Ghosh , Fan Wang
发明人： Bishwarup Mondal , Amitabha Ghosh , Fan Wang
IPC分类号： H04L25/03
CPC分类号： H04B7/0478 , H04B7/0417 , H04B7/0639 , H04L5/0007 , H04L25/03343
摘要： A method and apparatus are provided for feedback for closed-loop transmitting with multiple transmit antenna elements and multiple receive antenna elements. A base station includes a codebook containing sets of weightings for the multiple transmit antenna elements, with each set of weightings identified by an index and the codebook known to the base station and a served mobile station (MS). The base station pre-codes pilot signals using a precoding matrix, preferably a unitary matrix, to produce pre-coded pilot signals, which precoding matrix may or may not be known to the MS and which precoding matrix may or may not be included in the codebook. The base station then transmits the pre-coded pilot signals to the MS via the multiple transmit antenna elements and, in response, receives an index to a set of weightings in the codebook for use in a subsequent transmission of a data stream.
摘要翻译：提供了一种用于具有多个发射天线元件和多个接收天线元件的闭环发射的反馈的方法和装置。基站包括码本，其包含多个发射天线单元的加权集合，每一组加权由索引和基站已知的码本和被服务的移动台（MS）标识。基站使用预编码矩阵，优选地是酉矩阵来预编码导频信号，以产生预编码的导频信号，预编码矩阵可以是MS也可以不是已知的，并且哪个预编码矩阵可以或可以不包括在码本。然后，基站经由多个发送天线元件向MS发送预先编码的导频信号，作为响应，接收到码本中的一组加权的索引，用于数据流的后续发送。

47. 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。

48. 发明申请

US20080305805A1 METHOD AND APPARATUS FOR PERFORMING SPATIAL-DIVISION MULTIPLE ACCESS 有权
标题翻译：用于执行空间分割多路访问的方法和装置
公开(公告)号：US20080305805A1
公开(公告)日：2008-12-11
申请号：US12192164
申请日：2008-08-15
申请人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum, , Timothy A. Thomas , Frederick W. Vook
发明人： Bishwarup Mondal , Xiangyang Zhuang , Kevin L. Baum, , Timothy A. Thomas , Frederick W. Vook
IPC分类号： H04Q7/20 , H04M1/00
CPC分类号： H04B7/0617 , H04B7/0452 , H04B7/0634 , H04B7/0639 , Y02D70/444
摘要： A method and apparatus for performing spatial-division multiple access within a communication system is provided herein. During operation, nodes will return null subspace information along with their channel subspace information. The null subspace is similar to the channel subspace except that the null subspace information directs a base station to the matrix in a predefined codebook that results in minimum power being received at the node. The null subspace for each node is taken into consideration when communicating with a particular node.
摘要翻译：本文提供了一种在通信系统内执行空分多址的方法和装置。在运行期间，节点将返回空子空间信息及其信道子空间信息。空子空间类似于信道子空间，除了空子信息将基站指向预定义码本中的矩阵，导致在该节点处接收的最小功率。当与特定节点进行通信时，将考虑每个节点的空子空间。

49. 发明申请

US20080285667A1 METHOD AND APPARATUS FOR FEEDBACK IN CLOSED LOOP TRANSMITTING 失效
标题翻译：封闭环路发射反馈的方法与装置
公开(公告)号：US20080285667A1
公开(公告)日：2008-11-20
申请号：US12060301
申请日：2008-04-01
申请人： Bishwarup Mondal , Robert M. Harrison , Timothy A. Thomas
发明人： Bishwarup Mondal , Robert M. Harrison , Timothy A. Thomas
IPC分类号： H04L27/28
CPC分类号： H04B7/0417 , H04B7/0465 , H04B7/063 , H04B7/0634 , H04B7/0639 , H04B7/066
摘要： A method an apparatus is described for providing feedback for closed-loop transmitting with multiple transmit and receive antennas. The method includes a first step 900 of providing a codebook containing sets of weightings for each data stream of the multiple transmit antennas with each set identified by an index known to a transmitter and a receiver. The same codebook is utilized for any number of data streams up to the number of transmit antennas. A next step 902 includes measuring a composite channel between the transmitter and receiver. A next step 904 includes determining at least one performance metric for each set of weightings in the codebook. A next step 906 includes selecting preferred weightings for each data stream in response to the performance metrics. A next step 908 includes feeding back an index of the preferred weightings to the transmitter for use in subsequent transmissions.
摘要翻译：描述了一种用于提供用于具有多个发射和接收天线的闭环发射的反馈的装置的方法。该方法包括第一步骤900，其提供包含多个发射天线的每个数据流的权重集的码本，每个集合由发射机和接收机已知的索引识别。相同的码本被用于直到发射天线数量的任何数量的数据流。下一步骤902包括测量发射机和接收机之间的复合信道。下一步骤904包括确定码本中每一组加权的至少一个性能度量。下一步骤906包括响应于性能度量为每个数据流选择优选权重。接下来的步骤908包括将优先权重的索引反馈到发射机以用于随后的传输。

50. 发明授权

US09197284B2 Method and apparatus for pilot signal processing in a wireless communication system 有权
标题翻译：无线通信系统中导频信号处理的方法和装置
公开(公告)号：US09197284B2
公开(公告)日：2015-11-24
申请号：US12958512
申请日：2010-12-02
申请人： Timothy A. Thomas , Bishwarup Mondal
发明人： Timothy A. Thomas , Bishwarup Mondal
IPC分类号： H04B1/00 , H04B1/7097 , H04B1/7075 , H04J13/00 , H04J13/16 , H04L27/26 , H04L5/00
CPC分类号： H04B1/7097 , H04B1/7075 , H04B2201/70701 , H04B2201/709709 , H04J13/0062 , H04J13/16 , H04L5/0023 , H04L5/0026 , H04L5/0048 , H04L27/2611
摘要： A wireless communication system is provided that spreads pilot signals, or channel state information reference signals (CSI-RSs), using a spreading code chosen from a set of mutually unbiased bases (MUBs). The advantages of such spreading with MUBs are that multiple base stations can send their pilot signals on a same time-frequency resources, making the pilot signal design very efficient and also improving channel estimation at a user equipment through orthogonal and quasi-orthogonal spreading which gives a gain above noise and interference. A short spreading code chosen from MUBs may be used for spreading pilot signals transmitted from each antenna of a base station within a time-frequency resource comprising multiple closely-spaced subcarriers in frequency and/or multiple closely-spaced symbols in time.
摘要翻译：提供一种使用从一组相互无偏距的基座（MUB）中选择的扩展码扩展导频信号或信道状态信息参考信号（CSI-RS）的无线通信系统。 MUB这种扩展的优点是，多个基站可以在相同的时频资源上发送其导频信号，使得导频信号设计非常有效，并且还通过正交和准正交扩频改进用户设备的信道估计，增益高于噪声和干扰。从MUB选择的短扩展码可以用于在时间频率资源中扩展从基站的每个天线发送的导频信号，所述时间 - 频率资源包括频率和/或多个紧密间隔的符号中的多个紧密间隔的子载波。

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