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1. 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。

2. 发明申请

US20090190675A1 SYNCHRONIZATION IN A BROADCAST OFDM SYSTEM USING TIME DIVISION MULTIPLEXED PILOTS 审中-公开
标题翻译：使用时分多路复用器的广播OFDM系统中的同步
公开(公告)号：US20090190675A1
公开(公告)日：2009-07-30
申请号：US11933231
申请日：2007-10-31
申请人： Fuyun Ling , Alok Kumar Gupta , Raghuraman Krishnamoorthi , Ramaswamy Murali , Murali Ramaswamy Chari , Rajiv Vijayan , Bojan Vrcelj
发明人： Fuyun Ling , Alok Kumar Gupta , Raghuraman Krishnamoorthi , Ramaswamy Murali , Murali Ramaswamy Chari , Rajiv Vijayan , Bojan Vrcelj
IPC分类号： H04L27/28 , H04J3/06
CPC分类号： H04L27/2675 , H04L5/0007 , H04L5/0051 , H04L5/0064 , H04L7/042 , H04L25/0212 , H04L25/0216 , H04L25/0224 , H04L25/0226 , H04L27/2613 , H04L27/2656 , H04L27/2657 , H04L27/2662
摘要： In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least S1 identical pilot-1 sequences of length L1 and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2>L1, S1·L1=N, and S2·L2=N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot-1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
摘要翻译：在OFDM系统中，发射机在第一组子带上广播第一TDM导频，随后在每帧中的第二组子带上接收第二TDM导频。每个组中的子带从N个总子带中选出，使得（1）第一TDM导频的OFDM符号包含长度为L1的至少S1个相同的导频1序列，以及（2）第二TDM导频的OFDM符号包含至少S2个长度为L2的导频-2序列，其中L2> L1，S1.L1 = N，S2.L2 = N。发射机还可以广播FDM导频。接收机处理第一TDM导频以获得帧定时（例如，通过执行不同导频-1序列之间的相关）并且进一步处理第二TDM导频以获得符号定时（例如，通过检测导出的信道脉冲响应估计的开始从第二TDM导频）。

3. 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。

4. 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。

5. 发明授权

US08144824B2 Trend influenced time tracking 有权
标题翻译：趋势影响时间跟踪
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。

6. 发明授权

US08165167B2 Time tracking for a communication system 有权
标题翻译：通讯系统的时间跟踪
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
IPC分类号： H04J11/00 , H04L7/00
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。

7. 发明授权

US08175123B2 Collection window positioning using time tracking information 有权
标题翻译：收集窗口定位使用时间跟踪信息
公开(公告)号：US08175123B2
公开(公告)日：2012-05-08
申请号：US11371837
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： H04J3/08
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 positioning a collection window for a Fourier transform function is disclosed. A first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol are received. The first OFDM symbol comprises a plurality of frequency division multiplexed (FDM) symbols. The first OFDM symbol is characterized by at least two of the following: a delay spread, a first arriving path (FAP), or a last arriving path (LAP). A channel location is estimated from a channel impulse response. A point relative to the channel location is selected. A beginning of the collection window is positioned for the second OFDM symbol at the selected point. Alternatively, a point is selected at a first location relative to the channel location using a first algorithm if a delay spread is less than a predetermined length. The selected point is chosen at a second location relative to the channel location using a second algorithm if the delay spread is greater than the predetermined length.
摘要翻译：公开了一种用于定位用于傅立叶变换函数的收集窗口的方法。接收第一正交频分复用（OFDM）符号和第二OFDM符号。第一OFDM符号包括多个频分复用（FDM）符号。第一OFDM符号的特征在于以下至少两个：延迟扩展，第一到达路径（FAP）或最后到达路径（LAP）。从信道脉冲响应估计信道位置。选择相对于通道位置的点。收集窗口的开始位于所选点处的第二OFDM符号。或者，如果延迟扩展小于预定长度，则使用第一算法在相对于信道位置的第一位置处选择点。如果延迟扩展大于预定长度，则使用第二算法在相对于信道位置的第二位置处选择所选择的点。

8. 发明申请

US20070070971A1 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：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
IPC分类号： H04J3/24 , H04L12/56
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。

9. 发明授权

US08428001B2 Timing corrections in a multi carrier system and propagation to a channel estimation time filter 有权
标题翻译：多载波系统中的定时校正和传播到信道估计时间滤波器
公开(公告)号：US08428001B2
公开(公告)日：2013-04-23
申请号：US11373764
申请日：2006-03-09
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
IPC分类号： H04B7/212
CPC分类号： H04L25/0232 , H04L25/0212 , H04L25/0224 , H04L25/025 , H04L27/2662 , H04L27/2665
摘要： Systems and methods are provided for determining and applying timing corrections in a digital communications system. In an aspect, a timing correction method is provided for a multi-carrier system. This includes aligning two or more symbols with respect to each other from a symbol subset in order to account for timing differences between the symbols. The symbol alignment is first carried out to generate channel estimates for data demodulation. The channel estimates, thus generated, along with the timing alignment information are in turn used for determining timing corrections-to be applied to future symbols.
摘要翻译：提供了用于在数字通信系统中确定和应用定时校正的系统和方法。在一方面，为多载波系统提供定时校正方法。这包括从符号子集彼此对准两个或更多个符号，以便考虑符号之间的时序差异。首先执行符号对齐以产生用于数据解调的信道估计。由此生成的信道估计以及定时对准信息又用于确定定时校正，以应用于将来的符号。

10. 发明授权

US08433016B2 Narrow-band interference canceller 有权
标题翻译：窄带干扰消除器
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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