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1. 发明授权

US08442160B2 Adaptive time-filtering for channel estimation in OFDM system 有权
标题翻译： OFDM系统中信道估计的自适应时间滤波
公开(公告)号：US08442160B2
公开(公告)日：2013-05-14
申请号：US12939118
申请日：2010-11-03
申请人： Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
发明人： Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
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。

2. 发明授权

US07848463B2 Adaptive time-filtering for channel estimation in OFDM system 有权
标题翻译： OFDM系统中信道估计的自适应时间滤波
公开(公告)号：US07848463B2
公开(公告)日：2010-12-07
申请号：US11248976
申请日：2005-10-11
申请人： Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
发明人： Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
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。

3. 发明授权

US08553822B2 Time filtering for excess delay mitigation in OFDM systems 有权
标题翻译： OFDM系统中多余延迟缓解的时间滤波
公开(公告)号：US08553822B2
公开(公告)日：2013-10-08
申请号：US11022513
申请日：2004-12-22
申请人： Dhananjay Ashok Gore , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
发明人： Dhananjay Ashok Gore , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
IPC分类号： H04B1/10
CPC分类号： H04L25/0224 , H04L25/0212 , H04L25/022
摘要： Pilot transmission and channel estimation techniques for an OFDM system with excess delay spread are described. To mitigate the deleterious effects of excess delay spread, time filtering is utilized. Time filtering is utilized to combat excess delay spread effects in channel estimation. The time filtering is performed in the presence of staggered pilots and helps in improving the channel estimate in the presence of excess delay spread.
摘要翻译：描述了具有超延迟扩展的OFDM系统的导频传输和信道估计技术。为了减轻多余延迟扩展的有害影响，利用时间滤波。利用时间滤波来对付信道估计中的多余延迟扩散效应。在存在交错导频的情况下执行时间滤波，并有助于在存在超延迟扩展的情况下改善信道估计。

4. 发明授权

US08311133B2 Method and apparatus for sensing signaling parameters in a wireless communications network 有权
标题翻译：用于在无线通信网络中感测信令参数的方法和装置
公开(公告)号：US08311133B2
公开(公告)日：2012-11-13
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 , H04B7/216
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。

5. 发明授权

US08229708B2 Methods and apparatus for signal and interference energy estimation in a communication system 有权
标题翻译：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：US08229708B2
公开(公告)日：2012-07-24
申请号：US11563627
申请日：2006-11-27
申请人： Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
发明人： Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
IPC分类号： G01R15/00 , G01R21/00 , H04B15/00 , H04B1/10 , H04B3/46 , H04B1/00 , H04B17/00 , H04B1/04 , H04B1/12 , H04L25/08
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（Iest）。该方法还包括对干扰估计（Iest）进行平均以确定平均信道干扰（Ic），以及基于干扰估计（Iest）和平均信道干扰（Ic）来确定干扰能量（I）。在另一方面，一种装置包括阈值逻辑，其被配置为设置阈值并将信道估计与阈值进行比较以确定干扰估计（Iest）。该装置包括被配置为平均干扰估计（Iest）以确定平均信道干扰（Ic）的平均逻辑，以及被配置为基于干扰估计（Iest）和平均信道干扰（Ic））来确定干扰能量（I）的求和逻辑。

6. 发明申请

US20100316044A1 TIMING SYNCHRONIZATION AND CHANNEL ESTIMATION AT A TRANSITION BETWEEN LOCAL AND WIDE AREA WAVEFORMS USING A DESIGNATED TDM PILOT 有权
标题翻译：使用指定的TDM引导程序进行本地和宽带波形之间的转换的时序同步和信道估计
公开(公告)号：US20100316044A1
公开(公告)日：2010-12-16
申请号：US12862740
申请日：2010-08-24
申请人： Bojan VRCELJ , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
发明人： Bojan VRCELJ , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
IPC分类号： H04W56/00 , H04W40/00
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。

7. 发明授权

US07720027B2 System and method for a forward link only physical layer 有权
标题翻译：仅用于前向链路物理层的系统和方法
公开(公告)号：US07720027B2
公开(公告)日：2010-05-18
申请号：US11495480
申请日：2006-07-27
申请人： Fuyun Ling , Murali Ramaswamy Chari , Rajiv Vijayan , Ashok Mantravadi , Alok Kumar Gupta , Krishna Kiran Mukkavilli , Michael Mao Wang , Bojan Vrcelj , Bruce Collins
发明人： Fuyun Ling , Murali Ramaswamy Chari , Rajiv Vijayan , Ashok Mantravadi , Alok Kumar Gupta , Krishna Kiran Mukkavilli , Michael Mao Wang , Bojan Vrcelj , Bruce Collins
IPC分类号： H04W4/00
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。

8. 发明授权

US08644214B2 Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot 有权
标题翻译：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：US08644214B2
公开(公告)日：2014-02-04
申请号：US12862740
申请日：2010-08-24
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
IPC分类号： H04B7/212
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。

9. 发明授权

US07782806B2 Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot 有权
标题翻译：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：US07782806B2
公开(公告)日：2010-08-24
申请号：US11373607
申请日：2006-03-09
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Michael Mao Wang
IPC分类号： H04B7/00
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。

10. 发明申请

US20100150131A1 SIGNALING PARAMETERS CHANNEL PROCESSING 审中-公开
标题翻译：信号参数信道处理
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
IPC分类号： H04J3/00 , H04J3/06
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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