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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：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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53.发明授权Timing corrections in a multi carrier system and propagation to a channel estimation time filter 有权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
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。
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公开(公告)号：US20110051618A1
公开(公告)日：2011-03-03
申请号：US12939118
申请日：2010-11-03
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：US20100165851A1
公开(公告)日：2010-07-01
申请号：US12722308
申请日：2010-03-11
CPC分类号： H04W48/16
摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.
摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换，以便于提供FLO信号的无缝接收，FLO信号可以在RF信道之间超帧同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。
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56.发明授权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：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。
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57.发明授权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：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。
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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：US07706288B2
公开(公告)日：2010-04-27
申请号：US11359148
申请日：2006-02-21
CPC分类号： H04W48/16
摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.
摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以在第一RF信道和所监视的RF信道之间切换，以便于提供FLO信号的无缝接收，FLO信号可以在RF信道之间超帧同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。
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公开(公告)号：US20080020768A1
公开(公告)日：2008-01-24
申请号：US11828333
申请日：2007-07-25
IPC分类号： H04Q7/20
CPC分类号： H04W36/28 , H04W36/30 , H04W72/085
摘要： Systems and methodologies are described that facilitate monitoring RF channels in a wireless communication environment to determine whether one or more channels comprise a forward-link-only (FLO) signal. A receiver can receive a first RF channel with a FLO signal and can monitor other RF channels for FLO signals. Upon a determination that a monitored RF channel comprises a FLO signal, the receiver can switch between the first RF channel and the monitored RF channel, employing information on current MLC decoding status, to facilitate providing seamless reception of the FLO signal, which can be superframe synchronized between RF channels. FLO signal detection can be performed using one or more of a wide-area identification channel energy detection protocol and a wide-area overhead information symbol decoding error detection protocol.
摘要翻译： 描述了便于在无线通信环境中监视RF信道以确定一个或多个信道是包括仅前向链路（FLO）信号的系统和方法。 接收机可以接收具有FLO信号的第一RF信道，并且可以监视FLO信号的其他RF信道。 在确定被监视的RF信道包括FLO信号之后，接收机可以使用关于当前MLC解码状态的信息在第一RF信道和被监控的RF信道之间切换，以便于提供FLO信号的无缝接收，其可以是超帧 在RF信道之间同步。 可以使用广域识别信道能量检测协议和广域开销信息符号解码错误检测协议中的一个或多个来执行FLO信号检测。
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