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61. 发明授权

US08422477B2 Methods and apparatus for RF channel switching in a multi-frequency network 有权
标题翻译：多频网络中RF信道切换的方法和装置
公开(公告)号：US08422477B2
公开(公告)日：2013-04-16
申请号：US12055981
申请日：2008-03-26
申请人： Binita Gupta , An Mei Chen , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： Binita Gupta , An Mei Chen , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04J1/00
CPC分类号： H04W72/005 , H04H20/06 , H04H20/22 , H04H20/42 , H04L5/0023 , H04L5/0037 , H04L5/0091 , H04W16/02
摘要： Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a local area operations infrastructure (LOI) in the multi-frequency network, generating a channel description message that associates at least one descrambling sequence identifier with each RF channel associated with the LOI, respectively, and distributing the CDM over the LOI. In another aspect, a method includes receiving a CDM that associates at least one descrambling sequence identifier with each RF channel available in a LOI, detecting an RF channel switch event that identifies a selected RF channel, determining a selected descrambling sequence identifier from the CDM based on the selected RF channel, switching to the selected RF channel wherein the selected descrambling sequence identifier identifies a selected descrambling sequence to descramble desired content carried on the selected RF channel, and acquiring the desired content on the selected RF channel.
摘要翻译：多频网络中RF信道切换的方法和装置。一方面，一种方法包括识别多频网络中的局域操作基础结构（LOI），生成分别将至少一个解扰序列标识符与与LOI相关联的每个RF信道相关联的信道描述消息，并分发 CDM超过LOI。在另一方面，一种方法包括接收将至少一个解扰序列标识符与LOI中可用的每个RF信道相关联的CDM，检测识别所选RF信道的RF信道切换事件，从基于CDM确定所选解扰序列标识符在所选择的RF信道上，切换到所选择的RF信道，其中所选择的解扰序列标识符识别所选择的解扰序列，以对所选择的RF信道上承载的期望内容进行解扰，以及在所选择的RF信道上获取所需的内容。

62. 发明授权

US08249116B2 Methods and systems for timing acquisition robust to channel fading 有权
标题翻译：定时采集的方法和系统对信道衰落具有鲁棒性
公开(公告)号：US08249116B2
公开(公告)日：2012-08-21
申请号：US12644856
申请日：2009-12-22
申请人： Bojan Vrcelj , Krishna K. Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： Bojan Vrcelj , Krishna K. Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04J3/06 , H04J3/00 , H04B7/212
CPC分类号： H04L27/2662 , H04L25/0212 , H04L25/0216 , H04L27/2695
摘要： The embodiments provide mechanisms for synchronizing a receiver with OFDM pilots that are robust in the presence of channel fading conditions. In addition to using instantaneous channel estimate values to locate the first arriving path and last arriving path, the methods calculate time-domain averaged channel estimate values and use those averaged values to determine an average first arriving path and last arriving path. A combination of the instantaneous first arriving path and last arriving path and the average first arriving path and last arriving path may then be used to determine the delay spread and calculate a timing offset to be applied in timing synchronization. The various embodiments introduce improvements under channel fading conditions. Time-domain averaging may be embodied in a flexible DSP processor, or implemented in hardware and/or software. Using both instantaneous and time-averaged channel estimates greatly improves the robustness of time synchronization under channel fading conditions.
摘要翻译：实施例提供了用于使接收机与在存在信道衰落条件的情况下鲁棒的OFDM导频同步的机制。除了使用瞬时信道估计值来定位第一到达路径和最后到达路径之外，该方法还计算时域平均信道估计值，并使用这些平均值来确定平均第一到达路径和最后到达路径。然后可以使用瞬时第一到达路径和最后到达路径以及平均第一到达路径和最后到达路径的组合来确定延迟扩展，并计算要在定时同步中应用的定时偏移。各种实施例在信道衰落条件下引入改进。时域平均可以体现在灵活的DSP处理器中，或者在硬件和/或软件中实现。使用瞬时和时间平均信道估计大大提高了信道衰落条件下时间同步的鲁棒性。

63. 发明申请

US20100158160A1 EXTRACTING INFORMATION FROM POSITIONING PILOT CHANNEL SYMBOLS IN FORWARD LINK ONLY SYSTEM 审中-公开
标题翻译：从前进链接系统中的定位导频信号提取信息
公开(公告)号：US20100158160A1
公开(公告)日：2010-06-24
申请号：US12643664
申请日：2009-12-21
申请人： KRISHNA K. MUKKAVILLI , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： KRISHNA K. MUKKAVILLI , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04L27/06
CPC分类号： H04L27/2647 , H04L25/0212 , H04L25/022 , H04L25/023
摘要： Methods, systems, and apparatus, including computer programs encoded on computer readable storage media, for extracting transmitter identification information from the Positioning Pilot Channel (PPC) of a MediaFLO superframe. One of a wide area differentiator (WID) value and a local area differentiator (LID) value associated with the transmitter is determined based on signaling in a first interlace of a symbol received via the PPC. A time domain channel estimate is computed for the PPC based on signaling in a plurality of interlaces of the symbol and also based on the one of the WID and LID values. The time domain channel estimate is used to obtain a frequency domain channel estimate for a second interlace of the symbol that carries the transmitter identification information, and the frequency domain channel estimate is used to determine the transmitter identification information.
摘要翻译：方法，系统和装置，包括在计算机可读存储介质上编码的计算机程序，用于从MediaFLO超帧的定位导频信道（PPC）提取发射机识别信息。基于经由PPC接收的符号的第一交错中的信令来确定与发送器相关联的广域微分器（WID）值和局部区域微分器（LID）值之一。基于符号的多个交织中的信令，并且还基于WID和LID值中的一个来计算PPC的时域信道估计。使用时域信道估计来获得携带发射机识别信息的符号的第二交错的频域信道估计，并且使用频域信道估计来确定发射机识别信息。

64. 发明申请

US20080242225A1 APPARATUS AND METHODS FOR TESTING USING MODULATION ERROR RATIO 失效
标题翻译：使用调制错误比例进行测试的装置和方法
公开(公告)号：US20080242225A1
公开(公告)日：2008-10-02
申请号：US11834679
申请日：2007-08-06
申请人： Raghuraman Krishnamoorthi , Thomas Sun , Ashok Mantravadi
发明人： Raghuraman Krishnamoorthi , Thomas Sun , Ashok Mantravadi
IPC分类号： H04B17/02
CPC分类号： H04L1/206 , H04L1/24 , H04L27/2626 , H04L2001/0097
摘要： Apparatus and methods are disclosed for testing or qualifying a repeater/transmitter in a multicarrier system by utilizing modulation error ratio (MER). In particular, a disclosed method includes determining an estimated effective modulation error ratio of an output of the repeater/transmitter. The estimated effective modulation error ratio is compared with a predetermined threshold, and the repeater/transmitter is qualified when the estimated effective modulation error ratio is greater than the predetermined threshold. Using an estimated modulation error ratio for repeater/transmitters, which can have non-flat modulation error ratios over a total number of subcarriers, affords an efficient method to test and qualify repeater/transmitters.
摘要翻译：公开了用于通过利用调制误差比（MER）在多载波系统中测试或限定中继器/发射机的装置和方法。具体地，所公开的方法包括确定中继器/发射机的输出的估计有效调制误差比。将估计的有效调制误差比与预定阈值进行比较，并且当估计的有效调制误差比大于预定阈值时，中继器/发射机被限定。对于可能在副载波总数上具有非平坦调制误差比的中继器/发射机使用估计的调制误差率，提供了测试和限定中继器/发射机的有效方法。

65. 发明申请

US20120054585A1 PARITY CHECK MATRIX OPTIMIZATION AND SELECTION FOR ITERATIVE DECODING 失效
标题翻译：奇偶校验矩阵优化和选择迭代解码
公开(公告)号：US20120054585A1
公开(公告)日：2012-03-01
申请号：US12869555
申请日：2010-08-26
申请人： Jing Jiang , Tao Tian , Raghuraman Krishnamoorthi , Xinmiao Zhang , Ashok Mantravadi , Krishna K. Mukkavilli
发明人： Jing Jiang , Tao Tian , Raghuraman Krishnamoorthi , Xinmiao Zhang , Ashok Mantravadi , Krishna K. Mukkavilli
IPC分类号： H03M13/19 , G06F11/10
CPC分类号： H03M13/1111 , H03M13/1191 , H03M13/1515 , H03M13/2966 , H03M13/616 , H04L1/005 , H04L1/0057
摘要： A method of generating a parity check matrix for iterative decoding of a linear block code includes: determining a set of parity check vectors for the linear block code; ordering according to Hamming weight non-zero parity check vectors of the set; selecting a criterion for generating the parity check matrix; and building the parity check matrix by incrementally selecting according to the criterion a parity check vector for each consecutive row of the parity check matrix, wherein the parity check vector is selected from the ordered non-zero parity check vectors remaining in the set.
摘要翻译：一种生成用于线性块码的迭代解码的奇偶校验矩阵的方法包括：确定用于线性块码的一组奇偶校验向量; 根据汉明重量非零奇偶校验向量进行排序; 选择用于生成奇偶校验矩阵的标准; 以及通过根据所述标准逐渐选择所述奇偶校验矩阵的每个连续行的奇偶校验向量来构建所述奇偶校验矩阵，其中所述奇偶校验向量是从所述组中剩余的有序非零奇偶校验向量中选择的。

66. 发明授权

US08640012B2 Communication signal decoding with iterative cooperation between inner and outer codes 有权
标题翻译：通信信号解码与内部和外部代码之间的迭代协作
公开(公告)号：US08640012B2
公开(公告)日：2014-01-28
申请号：US12430719
申请日：2009-04-27
申请人： Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Jing Jiang
发明人： Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Jing Jiang
IPC分类号： G06F11/00
CPC分类号： H03M13/112 , H03M13/1111 , H03M13/1117 , H03M13/1191 , H03M13/1515 , H03M13/152 , H03M13/19 , H03M13/23 , H03M13/2966 , H03M13/658 , H04L1/005 , H04L1/0064
摘要： Received communication signals may be decoded according to a combined, iterative inner code—outer code decoding technique. The inner code decoding is based on information produced by the outer code decoding.
摘要翻译：接收到的通信信号可以根据组合的迭代内码外码解码技术进行解码。内码解码是基于由外码解码产生的信息。

67. 发明授权

US08635645B2 Apparatus and methods of providing and receiving venue level transmissions and services 有权
标题翻译：提供和接收场地级传输和服务的装置和方法
公开(公告)号：US08635645B2
公开(公告)日：2014-01-21
申请号：US12569792
申请日：2009-09-29
申请人： Raghuraman Krishnamoorthi , Pankaj V. Rahate , Pankaj Jain , Devarshi P. Shah , Pavel A. Seliverstov , George A. Rothrock , Nilabh Khare , Anil K. Wadhwani , Jiming Guo , Sanjiv Nanda , Fuyun Ling , Murali R. Chari , Avneesh Agrawal , Rinat Burdo , Prasanna Kannan , Krishna K. Mukkavilli , Reynaldo W. Newman , Michael M. Fan , Manoj M. Deshpande , Ranjith S. Jayaram
发明人： Raghuraman Krishnamoorthi , Pankaj V. Rahate , Pankaj Jain , Devarshi P. Shah , Pavel A. Seliverstov , George A. Rothrock , Nilabh Khare , Anil K. Wadhwani , Jiming Guo , Sanjiv Nanda , Fuyun Ling , Murali R. Chari , Avneesh Agrawal , Rinat Burdo , Prasanna Kannan , Krishna K. Mukkavilli , Reynaldo W. Newman , Michael M. Fan , Manoj M. Deshpande , Ranjith S. Jayaram
IPC分类号： H04N5/445
CPC分类号： H04N21/2385 , H04L12/189 , H04L67/16 , H04L67/18 , H04N21/482 , H04W4/02 , H04W4/04 , H04W48/16 , H04W72/005
摘要： A venue-cast system and method for providing and receiving venue level transmissions and services, including discovery of a venue specific transmission by receiving an overhead signal from a non-venue network, extracting information for receiving the venue specific transmission from the overhead signal, and tuning to receive the venue specific transmission based on the extracted information. The venue level transmission may be provided and received in a manner that does not prevent an access terminal from receiving a local area or wide area transmission.
摘要翻译：一种用于提供和接收场地级传输和服务的场地播放系统和方法，包括通过从非场地网络接收开销信号来发现场地特定传输，从开销信号中提取用于接收场地特定传输的信息，以及基于所提取的信息进行调谐以接收特定于场地的传输。可以以不阻止接入终端接收局域或广域传输的方式提供和接收场地级传输。

68. 发明申请

US20090271686A1 COMMUNICATION SIGNAL DECODING WITH ITERATIVE COOPERATION BETWEEN TURBO AND REED-SOLOMON DECODING 审中-公开
标题翻译：通信信号与涡轮机和解耦器之间的迭代合作解码
公开(公告)号：US20090271686A1
公开(公告)日：2009-10-29
申请号：US12165659
申请日：2008-07-01
申请人： Jing Jiang , Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Kent Walker
发明人： Jing Jiang , Fuyun Ling , Thomas Sun , Tao Tian , Raghuraman Krishnamoorthi , Kent Walker
IPC分类号： H03M13/15 , G06F11/10
CPC分类号： H03M13/112 , H03M13/1111 , H03M13/1117 , H03M13/1191 , H03M13/1515 , H03M13/152 , H03M13/19 , H03M13/23 , H03M13/2966 , H03M13/658 , H04L1/005 , H04L1/0064
摘要： Received communication signals may be decoded according to a combined turbo-RS (Reed-Solomon) decoding technique. The turbo decoding is based on information produced by the RS decoding.
摘要翻译：接收的通信信号可以根据组合的turbo-RS（里德 - 所罗门）解码技术进行解码。 turbo解码基于由RS解码产生的信息。

69. 发明授权

US08842612B2 Methods and apparatus for service acquisition in a multi-frequency network 有权
标题翻译：多频网络服务采集方法与装置
公开(公告)号：US08842612B2
公开(公告)日：2014-09-23
申请号：US12141840
申请日：2008-06-18
申请人： Binita Gupta , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： Binita Gupta , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04W48/18 , H04J1/16
CPC分类号： H04W48/18 , H04W28/18
摘要： Methods and apparatus for service acquisition in a multi-frequency network. In an aspect, a method is provided for service acquisition in a multi-frequency network. The method includes detecting a service acquisition trigger event and identifying a selected RF channel from an acquisition RF list based on signal strength, wherein the acquisition RF list identifies RF channels in one or more local operations infrastructures (LOIs) of the multi-frequency network. The method also includes acquiring a wide system on the selected RF channel, removing the selected RF channel from the acquisition RF list if the wide system can not be acquired on the selected RF channel, and repeating said operations of identifying, acquiring and removing until the wide system is acquired on the selected RF channel or a system acquisition timeout occurs.
摘要翻译：多频网络服务采集方法与装置。在一方面，提供了一种用于多频网络中的服务获取的方法。该方法包括基于信号强度检测服务获取触发事件和从获取RF列表识别所选择的RF信道，其中所述获取RF列表识别所述多频网络的一个或多个本地操作基础设施（LOI）中的RF信道。该方法还包括在所选择的RF信道上获取宽系统，如果在所选择的RF信道上不能获取宽系统，则从获取RF列表中移除所选择的RF信道，并重复所述识别，获取和去除的操作，直到在所选择的RF信道上获取宽系统，或发生系统采集超时。

70. 发明授权

US08676115B2 Apparatus and methods for testing using modulation error ratio 失效
标题翻译：使用调制误差比测试的装置和方法
公开(公告)号：US08676115B2
公开(公告)日：2014-03-18
申请号：US11834679
申请日：2007-08-06
申请人： Raghuraman Krishnamoorthi , Thomas Sun , Ashok Mantravadi
发明人： Raghuraman Krishnamoorthi , Thomas Sun , Ashok Mantravadi
IPC分类号： H04B17/02
CPC分类号： H04L1/206 , H04L1/24 , H04L27/2626 , H04L2001/0097
摘要： Apparatus and methods are disclosed for testing or qualifying a repeater/transmitter in a multicarrier system by utilizing modulation error ratio (MER). In particular, a disclosed method includes determining an estimated effective modulation error ratio of an output of the repeater/transmitter. The estimated effective modulation error ratio is compared with a predetermined threshold, and the repeater/transmitter is qualified when the estimated effective modulation error ratio is greater than the predetermined threshold. Using an estimated modulation error ratio for repeater/transmitters, which can have non-flat modulation error ratios over a total number of subcarriers, affords an efficient method to test and qualify repeater/transmitters.
摘要翻译：公开了用于通过利用调制误差比（MER）在多载波系统中测试或限定中继器/发射机的装置和方法。具体地，所公开的方法包括确定中继器/发射机的输出的估计有效调制误差比。将估计的有效调制误差比与预定阈值进行比较，并且当估计的有效调制误差比大于预定阈值时，中继器/发射机被限定。对于可能在副载波总数上具有非平坦调制误差比的中继器/发射机使用估计的调制误差率，提供了测试和限定中继器/发射机的有效方法。

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