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公开(公告)号：US08442160B2
公开(公告)日：2013-05-14
申请号：US12939118
申请日：2010-11-03
IPC分类号： H04L27/06
CPC分类号： H04L25/0232 , H04L25/022
摘要： Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.
摘要翻译： 在诸如正交频分复用（OFDM）系统的无线通信系统中的时间滤波信道估计可以用于提高信道估计的质量。 最优信道估计时间滤波器的特征可以取决于信道估计的方式以及信道估计的时间相关性。 接收机可以实现用于信道估计的自适应时间滤波器，其中时间滤波器响应可以基于信道估计参数而变化。 信道估计参数可以包括确定信道估计的方式，信道估计的时间相关性和估计的多普勒频率。 时间滤波器响应可以在响应范围内连续变化，或者可以在预定数量的时间滤波器响应上离散变化。
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公开(公告)号：US20100150131A1
公开(公告)日：2010-06-17
申请号：US12509820
申请日：2009-07-27
申请人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
发明人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
CPC分类号： H04L23/02 , H04L5/0053 , H04L25/0206 , H04L25/0218 , H04L25/023 , H04L27/2613 , H04L27/2647
摘要： In a multicasts wireless telecommunication system providing an aggregation of one or more independent data components as a flow, wherein the OIS is located at the latch point of the beginning of the superframe, and the OIS programming is latched at the superframe boundary, the improvement of deriving signal parameter information from Signaling Parameter Channel (SPC) symbols transmitted in a Forward Link only (FLO) network by deriving a time domain channel estimate by assuming each of the combinations for the signal parameter field in the scrambler seed and picking the signal parameter combination that yields the most energy in the time domain above a threshold value.
摘要翻译： 在提供作为流的一个或多个独立数据组件的聚合的组播无线电信系统中，其中OIS位于超帧开始的锁存点处，并且OIS编程在超帧边界处被锁存， 通过通过假设加扰器种子中的信号参数字段的每个组合并且选择信号参数组合来导出时域信道估计，从在仅前向链路（FLO）网络中发送的信令参数信道（SPC）符号中导出信号参数信息 其在时域中产生的能量大于阈值以上。
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公开(公告)号：US20090245154A1
公开(公告)日：2009-10-01
申请号：US12334436
申请日：2008-12-12
申请人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
发明人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Durk L. van Veen , Murali Ramaswamy Chari , Raghuraman Krishnamoorthi , Rajeev Krishnamurthi , Fuyun Ling
CPC分类号： H04L23/02 , H04L5/0053 , H04L25/0206 , H04L25/0218 , H04L25/023 , H04L27/2613 , H04L27/2647
摘要： In a multicasts wireless telecommunication system providing an aggregation of one or more independent data components as a flow, wherein the OIS is located at the latch point of the beginning of the superframe, and the OIS programming is latched at the superframe boundary, the improvement of deriving signal parameter information from Signaling Parameter Channel (SPC) symbols transmitted in a Forward Link only (FLO) network by deriving a time domain channel estimate by assuming each of the combinations for the signal parameter field in the scrambler seed and picking the signal parameter combination that yields the most energy in the time domain above a threshold value.
摘要翻译： 在提供作为流的一个或多个独立数据组件的聚合的组播无线电信系统中，其中OIS位于超帧开始的锁存点处，并且OIS编程在超帧边界处被锁存， 通过通过假设加扰器种子中的信号参数字段的每个组合并且选择信号参数组合来导出时域信道估计，从在仅前向链路（FLO）网络中发送的信令参数信道（SPC）符号中导出信号参数信息 其在时域中产生的能量大于阈值以上。
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14.发明申请METHOD AND APPARATUS FOR SENSING SIGNALING PARAMETERS IN A WIRELESS COMMUNICATIONS NETWORK 有权用于无线通信网络中传感信号参数的方法与装置公开(公告)号：US20090028256A1
公开(公告)日：2009-01-29
申请号：US11834653
申请日：2007-08-06
申请人： Durk L. van Veen , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Krishna Kiran Mukkavilli , Fuyun Ling
发明人： Durk L. van Veen , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Krishna Kiran Mukkavilli , Fuyun Ling
IPC分类号： H04L27/28
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/0044 , H04L5/0048 , H04L5/0053 , H04L5/008 , H04L5/0094 , H04L27/2607 , H04L27/2626 , H04L27/2628 , H04L27/2647 , H04L27/2656
摘要： A new channel is added to FLO networks that carries embedded signaling parameter information. The design is such that regardless of the actual values of the signaling parameters conveyed, a receiver will be able to demodulate this new channel. Moreover, the addition of the new channel does not render a FLO network that has been so configured to not be backwards-compatible with existing devices.
摘要翻译： 一个新的信道被添加到携带嵌入式信令参数信息的FLO网络中。 这种设计使得无论传达的信令参数的实际值如何，接收机将能够解调这个新的信道。 此外，添加新频道并不会使FLO网络被配置为不与现有设备向后兼容。
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15.发明申请METHODS AND APPARATUS FOR SIGNAL AND INTERFERENCE ENERGY ESTIMATION IN A COMMUNICATION SYSTEM 有权通信系统中信号和干扰能量估计的方法和装置公开(公告)号：US20080123540A1
公开(公告)日：2008-05-29
申请号：US11563627
申请日：2006-11-27
IPC分类号： H04J1/16
CPC分类号： H04B1/1027
摘要： Methods and apparatus for signal and interference energy estimation in a communication system. In an aspect, a method includes setting a threshold value, and comparing a channel estimate to the threshold value to determine an interference estimate (Iest). The method also includes averaging the interference estimate (Iest) to determine average channel interference (Ic), and determining interference energy (I) based on the interference estimate (Iest) and the average channel interference (Ic). In another aspect, an apparatus includes threshold logic configured to set a threshold value and compare a channel estimate to the threshold value to determine an interference estimate (Iest). The apparatus includes averaging logic configured to average the interference estimate (Iest) to determine average channel interference (Ic), and summing logic configured to determine interference energy (I) based on the interference estimate (Iest) and average channel interference (Ic).
摘要翻译： 通信系统中信号和干扰能量估计的方法和装置。 一方面，一种方法包括设置阈值，以及将信道估计与阈值进行比较，以确定干扰估计（I est）。 该方法还包括对干扰估计进行平均以确定平均信道干扰（I SUB），以及基于干扰估计（I）来确定干扰能量（I） ＆lt; SUB＆gt;）和平均信道干扰（I SUB）。 在另一方面，一种装置包括阈值逻辑，其配置成设置阈值并将信道估计与阈值进行比较以确定干扰估计（I est）。 所述装置包括被配置为平均干扰估计（I＆gt;）以确定平均信道干扰（I SUB）的平均逻辑，以及被配置为确定干扰能量（I） 基于干扰估计（I EST）和平均信道干扰（I SUB）。
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公开(公告)号：US08144824B2
公开(公告)日：2012-03-27
申请号：US11371535
申请日：2006-03-08
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
IPC分类号： H04B1/10
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0228 , H04L27/261 , H04L27/265 , H04L27/2665 , H04L27/2679
摘要： A method for determining a communication channel location is disclosed. A first subset of a plurality of channel impulse responses is averaged over a first time period to produce a first filtered channel impulse response, and a second subset of the plurality of channel impulse responses is averaged over a second time period to produce a second filtered channel impulse response. The second time period is different from the first time period, and the second subset is different from the first subset. The communication channel location is determined using the first filtered channel impulse response and the second filtered channel impulse response.
摘要翻译： 公开了一种用于确定通信信道位置的方法。 多个信道脉冲响应的第一子集在第一时间段内被平均以产生第一经滤波的信道脉冲响应，并且在第二时间周期上平均多个信道脉冲响应的第二子集，以产生第二滤波信道 脉冲响应。 第二时间段与第一时间段不同，第二子集与第一子集不同。 使用第一滤波信道脉冲响应和第二滤波信道脉冲响应来确定通信信道位置。
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17.发明申请Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot 有权使用指定的TDM导频在本地和广域波形之间转换的定时同步和信道估计公开(公告)号：US20070211765A1
公开(公告)日：2007-09-13
申请号：US11373607
申请日：2006-03-09
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Mukkavilli , Raghuraman Krishnamoorthi , Michael Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Mukkavilli , Raghuraman Krishnamoorthi , Michael Wang
IPC分类号： H04J3/06
CPC分类号： H04L27/2613 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/0216 , H04L25/0226 , H04L25/03866 , H04L27/2662 , H04L27/2675
摘要： Systems and methods are provided for channel estimation and timing synchronization in a wireless network. In an embodiment, a method is provided for time synchronization at a wireless receiver. The method includes decoding at least one TDM pilot symbol located at a transition between wide and local waveforms and processing the TDM pilot symbol to perform time synchronization for a wireless receiver. Methods for channel estimation at a wireless receiver are also provided. This includes decoding at least one TDM pilot symbol and receiving the TDM pilot symbol from an OFDM broadcast to facilitate channel estimation for a wireless receiver.
摘要翻译： 提供了系统和方法用于无线网络中的信道估计和定时同步。 在一个实施例中，提供了一种用于在无线接收机处进行时间同步的方法。 该方法包括解码位于宽和局部波形之间的转变处的至少一个TDM导频符号，并处理TDM导频符号以对无线接收机执行时间同步。 还提供了在无线接收机处进行信道估计的方法。 这包括解码至少一个TDM导频符号并从OFDM广播接收TDM导频符号以便于无线接收机的信道估计。
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公开(公告)号：US20070070971A1
公开(公告)日：2007-03-29
申请号：US11495480
申请日：2006-07-27
申请人： Fuyun Ling , Murali Chari , Rajiv Vijayan , Ashok Mantravadi , Alok Gupta , Krishna Mukkavilli , Michael Wang , Bojan Vrcelj , Bruce Collins
发明人： Fuyun Ling , Murali Chari , Rajiv Vijayan , Ashok Mantravadi , Alok Gupta , Krishna Mukkavilli , Michael Wang , Bojan Vrcelj , Bruce Collins
CPC分类号： H04L1/0002 , H04L1/0017 , H04L1/0041 , H04L1/0075 , H04L5/0007 , H04L5/0048 , H04L27/2613 , H04L27/2647 , H04L27/2662 , H04L69/32 , H04W48/08 , H04W72/005 , H04W80/00 , H04W88/02 , H04W92/10
摘要： Systems and methods are provided for processing forward link only (FLO) signals. A device receives a FLO signal, processes a TDM pilot comprising a TDM Pilot 1, a TDM Pilot 2, a WIC, a LIC, a Transition Pilot Channel, and a Positioning Pilot, from the FLO signal, processes an overhead information symbol (OIS) comprising a wide-area OIS and a local-area OIS, from the FLO signal, processes an FDM pilot comprising a wide-area FDM pilot and a local-area FDM pilot, from the FLO signal; and processes data comprising wide-area data and local-area data, from the FLO signal.
摘要翻译： 提供系统和方法用于仅处理前向链路（FLO）信号。 设备接收FLO信号，从FLO信号处理包括TDM导频1，TDM导频2，WIC，LIC，转换导频信道和定位导频的TDM导频，处理开销信息符号（OIS ）包括来自FLO信号的广域OIS和局域OIS，从FLO信号处理包括广域FDM导频和本地FDM导频的FDM导频; 并从FLO信号处理包括广域数据和局域数据的数据。
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公开(公告)号：US08433016B2
公开(公告)日：2013-04-30
申请号：US12780600
申请日：2010-05-14
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver, and methods therefor, including an automatic gain control circuit with a first digital variable gain amplifier that outputs digital samples based on a modulated wireless signal, an interference canceller configured to filter the digital samples using a least mean squares algorithm to reduce narrowband interference, and a second DVGA configured to amplify the filtered digital samples.
摘要翻译： 本发明涉及一种接收机及其方法，包括具有基于调制无线信号输出数字样本的第一数字可变增益放大器的自动增益控制电路，被配置为使用最小均方对数字采样进行滤波的干扰消除器 算法来减少窄带干扰，第二个DVGA被配置为放大经滤波的数字样本。
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公开(公告)号：US08165167B2
公开(公告)日：2012-04-24
申请号：US11371536
申请日：2006-03-08
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Michael Mao Wang
CPC分类号： H04L27/2662 , H04L5/0007 , H04L5/0048 , H04L25/0216 , H04L25/022 , H04L25/0228 , H04L27/261 , H04L27/265 , H04L27/2665 , H04L27/2679
摘要： A method for characterizing a communication channel is disclosed. A detection window is moved through a channel profile to accumulate tap energies in the channel profile within the detection window into an accumulated energy curve. A peak at a maximum in the accumulated energy curve is determined. A band relative to the accumulated energy curve is defined. A first arriving path (FAP) is determined using a trailing edge found near a second end of a zone in the accumulated energy curve. A leading edge is found near a first end of the zone of the accumulated energy curve. The last arriving path (LAP) is determined using the leading edge. The band defines a zone of the accumulated energy curve at or near the maximum that is within the band.
摘要翻译： 公开了一种用于表征通信信道的方法。 检测窗口通过通道轮廓移动，以将检测窗口内的通道轮廓中的抽头能量累积为累积的能量曲线。 确定累积能量曲线中最大值的峰值。 定义相对于累积能量曲线的带。 使用在累积能量曲线中的区域的第二端附近发现的后沿来确定第一到达路径（FAP）。 在累积能量曲线的区域的第一端附近发现前沿。 最后到达路径（LAP）使用前沿确定。 频带定义在频带内或附近的最大值处的累积能量曲线的区域。
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