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41.发明授权Methods and apparatus for time tracking using assistance from TDM pilots in a communication network 有权在通信网络中使用TDM导频协助进行时间跟踪的方法和装置公开(公告)号：US07839831B2
公开(公告)日：2010-11-23
申请号：US11970381
申请日：2008-01-07
CPC分类号： H04L27/2662 , H04L25/0216 , H04L25/0224 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus for time tracking using assistance from TDM pilots in a communication network. In an aspect, a method is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The method includes determining a delay spread, and modifying at least one parameter used by the time tracking algorithm based on the delay spread. In another aspect, an apparatus is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The apparatus includes computation logic for determining a delay spread, and control logic for modifying at least one parameter used by the time tracking algorithm based on the delay spread.
摘要翻译： 在通信网络中使用TDM导频协助进行时间跟踪的方法和装置。 在一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的方法，其中该设备执行时间跟踪算法。 该方法包括确定延迟扩展，以及基于延迟扩展修改由时间跟踪算法使用的至少一个参数。 在另一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的设备，其中该设备执行时间跟踪算法。 该装置包括用于确定延迟扩展的计算逻辑，以及用于基于延迟扩展修改由时间跟踪算法使用的至少一个参数的控制逻辑。
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42.发明申请公开(公告)号：US20090016380A1
公开(公告)日：2009-01-15
申请号：US12051209
申请日：2008-03-19
申请人： Binita Gupta , An Mei Chen , Devarshi Shah , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi , Taoufik Tani
发明人： Binita Gupta , An Mei Chen , Devarshi Shah , Linbo Li , Raghuraman Krishnamoorthi , Ashok Mantravadi , Taoufik Tani
IPC分类号： H04J1/00
摘要： Methods and apparatus for RF channel switching in a multi-frequency network. In an aspect, a method includes identifying a multiplex set that comprises one or more content flows, wherein the multiplex set is one of a vertical multiplex (VM) set and a unified multiplex (UM) set, generating an overhead message that associates one or more RF carrier frequencies with the one or more content flows, and transmitting the overhead message over the multi-frequency network. An apparatus includes input logic configured to receive an overhead message that associates one or more content flows with one or more RF carrier frequencies, and processing logic configured to detect a channel switch event that identifies a selected content flow, determine a selected RF carrier frequency associated with the selected content flow based on the overhead message, and switch to the selected RF carrier frequency to receive the selected content flow.
摘要翻译： 多频网络中RF信道切换的方法和装置。 一方面，一种方法包括识别包括一个或多个内容流的多路复用集合，其中多路复用集合是垂直多路复用（VM）集合和统一多路复用（UM）集合之一，生成将开销消息与一个或多个内容流相关联的开销消息， 具有一个或多个内容流的更多RF载波频率，以及通过多频网络发送开销消息。 一种装置包括输入逻辑，其被配置为接收将一个或多个内容流与一个或多个RF载波频率相关联的开销消息，以及被配置为检测识别所选内容流的信道切换事件的处理逻辑，确定所选择的RF载波频率相关联 所选择的内容流程基于开销消息，并且切换到所选择的RF载波频率以接收所选择的内容流。
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43.发明申请公开(公告)号：US20070140385A1
公开(公告)日：2007-06-21
申请号：US11303487
申请日：2005-12-15
IPC分类号： H04L27/06
CPC分类号： H04L27/2662 , H04L25/0202 , H04L27/2686
摘要： Apparatus and methods for use in a wireless communication system are disclosed for determining a timing position for channel activity in order to resolve timing ambiguity. A disclosed apparatus includes a processor that determines when channel activity occurs in at least one of an early or a late arrival position in a communication channel estimate and unwraps the channel activity in either the early arrival position or the late arrival position to a corresponding late or early arrival unwrapped channel activity position in the wireless channel estimate. The processor correlates symbol data in the communication signal corresponding to both the channel activity and the unwrapped channel activity to symbol data of the main channel activity. The processor determines whether a correct timing position of the channel activity is one of the early or late arrival positions based on the correlations, thus resolving timing ambiguity. Complementary methods are also disclosed.
摘要翻译： 公开了用于无线通信系统中的装置和方法，用于确定信道活动的定时位置，以便解决定时模糊。 所公开的装置包括处理器，其确定在通信信道估计中的早期或迟到到达位置中的至少一个中何时发生信道活动，并且将早期到达位置或延迟到达位置中的信道活动解包到相应的延迟或 在无线信道估计中提前到达解开的频道活动位置。 处理器将对应于信道活动和解开的信道活动的通信信号中的符号数据与主信道活动的符号数据相关联。 处理器基于相关性确定信道活动的正确定时位置是早期还是迟到位置之一，从而解决定时模糊度。 还公开了互补方法。
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44.发明授权Methods and apparatus for signaling parameter distribution for neighboring radio frequencies 有权用于信号参数分配的相邻射频的方法和装置公开(公告)号：US08855655B2
公开(公告)日：2014-10-07
申请号：US12176376
申请日：2008-07-20
摘要： Methods and apparatus for signaling parameter distribution for neighboring radio frequencies. A method includes identifying selected local operations infrastructures (LOIs) and one or more neighboring LOIs, generating a neighbor description message (NDM) that identifies the selected LOIs and their respective neighbors and specifies SP information for each RF channel associated with the selected LOIs and their respective neighbors, and distributing the NDM over each of the selected LOIs. An apparatus includes a message decoder configured to receive a NDM that identifies RF channels associated with selected LOIs and one or more neighboring LOIs, wherein each RF channel is associated with SP information, and processing logic configured to receive a request to obtain selected SP information associated with a selected RF channel, determine the selected SP information associated with the selected RF channel based on the NDM, and output the selected SP information.
摘要翻译： 用于信号参数分配的相邻射频的方法和装置。 一种方法包括识别所选择的本地操作基础设施（LOI）和一个或多个相邻LOI，生成标识所选择的LOI及其相应邻居的邻居描述消息（NDM），并且为与所选择的LOI相关联的每个RF信道指定SP信息， 并且在每个所选择的LOI上分发NDM。 一种装置包括消息解码器，其被配置为接收标识与所选择的LOI和一个或多个相邻LOI相关联的RF信道的NDM，其中每个RF信道与SP信息相关联，以及处理逻辑，被配置为接收获取所选择的SP信息的请求 利用所选择的RF信道，基于NDM确定与所选择的RF信道相关联的所选择的SP信息，并输出所选择的SP信息。
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公开(公告)号：US08509325B2
公开(公告)日：2013-08-13
申请号：US12250135
申请日：2008-10-13
IPC分类号： H04L27/28
CPC分类号： H04L25/0218 , H04L5/0007 , H04L25/0204 , H04L25/022 , H04L25/0224
摘要： An adaptive thresholding technique eliminates suboptimum threshold values by adjusting for varying channel conditions to eliminate interference where no channel energy is present, without discarding viable taps having useful channel energy. The adaptive thresholding technique adaptively optimizes receive threshold values for both wide and local area channels based only on measured C/I ratios 300. Thresholds are calculated based on instantaneous C/I estimates and/or weighted average C/I estimates calculated from WID/LID energies obtained from the current superframe WIC/LIC symbols respectively. In alternate embodiments, thresholds are calculated based on instantaneous C/I estimates and/or weighted average C/I estimates calculated from WTPC and LTPC symbols for the wide and local area channels, respectively The present adaptive thresholding technique dynamically reduces the threshold as the C/I estimate increases to mitigate performance degradation due to removal of weak signal taps. There is a separate threshold for each of the 12 coding and modulation modes supported by an exemplary receiver.
摘要翻译： 自适应阈值技术通过调整不同的信道条件来消除次优阈值，以消除不存在信道能量的干扰，而不丢弃具有有用信道能量的可行分接头。 自适应阈值技术仅基于测量的C / I比300自适应地优化宽和局域信道的接收阈值。阈值基于从WID / LID计算的瞬时C / I估计和/或加权平均C / I估计来计算 从当前超帧WIC / LIC符号获得的能量。 在替代实施例中，基于针对宽和局域信道的WTPC和LTPC符号计算的瞬时C / I估计和/或加权平均C / I估计来计算阈值。当前自适应阈值技术动态地将阈值设置为C /我估计增加以减轻由于去除弱信号抽头而导致的性能下降。 对于由示例性接收机支持的12个编码和调制模式中的每一个，存在单独的阈值。
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46.发明授权公开(公告)号：US08422477B2
公开(公告)日：2013-04-16
申请号：US12055981
申请日：2008-03-26
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。
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47.发明授权公开(公告)号：US08249116B2
公开(公告)日：2012-08-21
申请号：US12644856
申请日：2009-12-22
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。
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48.发明授权Method and apparatus for initial acquisition of signaling parameters for a wireless communications network 有权用于初始获取无线通信网络的信令参数的方法和装置公开(公告)号：US08102756B2
公开(公告)日：2012-01-24
申请号：US11834669
申请日：2007-08-06
申请人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Tao Tian
发明人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Tao Tian
CPC分类号： H04W48/16 , H04L27/2647
摘要： A method of acquiring a forward link only (FLO) network in a radio frequency (RF) in a wireless communication environment, includes selecting a RF from a first list; selecting a signal parameter (SP) from a second list; determining if a first parameter is found using the selected RF and SP; and, upon determination that the first parameter is found, enabling the use of the selected RF and SP to communicate in the FLO network. An apparatus for implementing the method is also disclosed.
摘要翻译： 一种在无线通信环境中在射频（RF）中获取前向链路（FLO）网络的方法，包括从第一列表中选择RF; 从第二列表中选择信号参数（SP）; 使用所选择的RF和SP确定是否发现第一参数; 并且在确定发现第一参数之后，使所选择的RF和SP能够在FLO网络中进行通信。 还公开了一种用于实现该方法的装置。
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49.发明申请EXTRACTING INFORMATION FROM POSITIONING PILOT CHANNEL SYMBOLS IN FORWARD LINK ONLY SYSTEM 审中-公开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
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。
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50.发明申请METHODS AND APPARATUS FOR TIME TRACKING USING ASSISTANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK 有权在通信网络中使用TDM PILOTS协助进行时间跟踪的方法和装置公开(公告)号：US20080260008A1
公开(公告)日：2008-10-23
申请号：US11970381
申请日：2008-01-07
IPC分类号： H04B1/707
CPC分类号： H04L27/2662 , H04L25/0216 , H04L25/0224 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus for time tracking using assistance from TDM pilots in a communication network. In an aspect, a method is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The method includes determining a delay spread, and modifying at least one parameter used by the time tracking algorithm based on the delay spread. In another aspect, an apparatus is provided for time tracking in a device operating on a communication network, wherein the device performs a time tracking algorithm. The apparatus includes computation logic for determining a delay spread, and control logic for modifying at least one parameter used by the time tracking algorithm based on the delay spread.
摘要翻译： 在通信网络中使用TDM导频协助进行时间跟踪的方法和装置。 在一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的方法，其中该设备执行时间跟踪算法。 该方法包括确定延迟扩展，以及基于延迟扩展修改由时间跟踪算法使用的至少一个参数。 在另一方面，提供了一种用于在通信网络上操作的设备中进行时间跟踪的设备，其中该设备执行时间跟踪算法。 该装置包括用于确定延迟扩展的计算逻辑，以及用于基于延迟扩展修改由时间跟踪算法使用的至少一个参数的控制逻辑。
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