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1. 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。

2. 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。

3. 发明申请

US20120069934A1 SYSTEM AND METHOD FOR REDUCING POWER CONSUMPTION IN A FLO-EV RECEIVER 失效
标题翻译：降低FLO-EV接收机功耗的系统和方法
公开(公告)号：US20120069934A1
公开(公告)日：2012-03-22
申请号：US12887216
申请日：2010-09-21
申请人： JING JIANG , Raghuraman Krishnamoorthi , Krishna K. Mukkavilli , Bojan Vrcelj
发明人： JING JIANG , Raghuraman Krishnamoorthi , Krishna K. Mukkavilli , Bojan Vrcelj
IPC分类号： H03K9/00
CPC分类号： H04L1/0053 , H04L1/20 , H04L25/0202 , H04L27/2601
摘要： A method for exiting receiver processing in a FLO-EV receiver comprises receiving a communication signal comprising at least one received symbol, deriving a channel performance metric based on the received symbol, determining whether the metric exceeds a threshold, and when the metric exceeds the threshold, providing a logic signal to signal receiver processing cessation.
摘要翻译：一种用于在FLO-EV接收机中退出接收机处理的方法包括：接收包括至少一个接收符号的通信信号，基于接收到的符号导出信道性能度量，确定度量是否超过阈值，以及当度量超过阈值时，提供逻辑信号来接收信号的处理停止信号。

4. 发明申请

US20110116396A1 METHODS AND APPARATUS FOR TIME TRACKING USING ASSITANCE FROM TDM PILOTS IN A COMMUNICATION NETWORK 有权
标题翻译：在通信网络中使用TDM PILOTS的资产进行时间跟踪的方法和装置
公开(公告)号：US20110116396A1
公开(公告)日：2011-05-19
申请号：US12917789
申请日：2010-11-02
申请人： Bojan Vrcelj , Ashok Mantravadi , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
发明人： Bojan Vrcelj , Ashok Mantravadi , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi
IPC分类号： H04J3/14 , H04L12/26
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。

5. 发明申请

US20110080924A1 METHOD FOR TRANSMISSION OF TIME DIVISION MULTIPLEXED PILOT SYMBOLS TO AID CHANNEL ESTIMATION, TIME SYNCHRONIZATION, AND AGC BOOTSTRAPPING IN A MULTICAST WIRELESS SYSTEM 有权
标题翻译：用于传输多路复用引导符号的方法，用于在多路无线系统中进行信道估计，时间同步和AGC引导
公开(公告)号：US20110080924A1
公开(公告)日：2011-04-07
申请号：US12896780
申请日：2010-10-01
申请人： Michael Mao Wang , Bojan Vrcelj , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： Michael Mao Wang , Bojan Vrcelj , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04J3/00
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/0048 , H04L25/023
摘要： Systems and methods are provided for the transmission of waveforms to aid channel estimation, timing synchronization, and AGC bootstrapping in a wireless network. The method includes inserting at least one TDM pilot symbol located at a transition between wide area and local area waveforms to facilitate decoding of the transmission block.
摘要翻译：提供了用于传输波形以辅助无线网络中的信道估计，定时同步和AGC自举的系统和方法。该方法包括插入位于广域和局域波形之间的转变处的至少一个TDM导频符号，以便于传输块的解码。

6. 发明授权

US07813383B2 Method for transmission of time division multiplexed pilot symbols to aid channel estimation, time synchronization, and AGC bootstrapping in a multicast wireless system 有权
标题翻译：用于传输时分复用导频符号以辅助多播无线系统中的信道估计，时间同步和AGC引导的方法
公开(公告)号：US07813383B2
公开(公告)日：2010-10-12
申请号：US11372930
申请日：2006-03-09
申请人： Michael Mao Wang , Bojan Vrcelj , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
发明人： Michael Mao Wang , Bojan Vrcelj , Krishna Kiran Mukkavilli , Raghuraman Krishnamoorthi , Ashok Mantravadi
IPC分类号： H04J3/06
CPC分类号： H04L27/2613 , H04L5/0007 , H04L5/0048 , H04L25/023
摘要： Systems and methods are provided for the transmission of waveforms. The method includes inserting at least one TDM pilot symbol located at a transition between wide area and local area waveforms to facilitate decoding of the transmission block.
摘要翻译：提供了波形传输的系统和方法。该方法包括插入位于广域和局域波形之间的转变处的至少一个TDM导频符号，以便于传输块的解码。

7. 发明申请

US20100034242A1 METHODS AND APPARATUS FOR DETERMINING TIMING IN A WIRELESS COMMUNICATION SYSTEM 失效
标题翻译：用于确定无线通信系统中的时序的方法和装置
公开(公告)号：US20100034242A1
公开(公告)日：2010-02-11
申请号：US12579131
申请日：2009-10-14
申请人： BOJAN VRCELJ , Fuyun Ling , Michael Mao Wang
发明人： BOJAN VRCELJ , Fuyun Ling , Michael Mao Wang
IPC分类号： H04B1/38 , H04L7/00
CPC分类号： H04L27/2662 , H04L27/2676
摘要： Methods and apparatus for setting timing of sampling of one or more symbols. The disclosed methods account for at least three types of effective interference (EI) and are used to set the timing of a sampling window for sampling received symbols. The methods includes setting timing based on determining an energy density function accounting for both static and dynamic EI, determining the minimum of a total energy profile and sliding the sampling window to ensure that the minimum point is at a predetermined point, and determining and using a composite energy profile accounting for short term and long term fading effects. The disclosed apparatus include a transceiver employing one or more of the disclosed methods for setting timing when receiving the symbols.
摘要翻译：用于设置一个或多个符号的采样定时的方法和装置。所公开的方法至少有三种类型的有效干扰（EI），并且用于设置用于采样接收符号的采样窗口的定时。所述方法包括基于确定静态和动态EI两者的能量密度函数来设定定时，确定总能量分布的最小值，并滑动采样窗口以确保最小点在预定点，以及确定和使用复合能量曲线描述短期和长期衰落影响。所公开的装置包括采用一种或多种所述方法的收发机，用于在接收符号时设置定时。

8. 发明申请

US20080165908A1 METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION BASED ON TRANSITIONAL PILOT SYMBOLS 有权
标题翻译：基于过渡引导符号的时序同步的方法与装置
公开(公告)号：US20080165908A1
公开(公告)日：2008-07-10
申请号：US11765428
申请日：2007-06-19
申请人： Bojan Vrcelj , Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi
发明人： Bojan Vrcelj , Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi
IPC分类号： H04L7/00
CPC分类号： H04L27/2662 , H04L5/0048 , H04L7/08 , H04L25/0216 , H04L25/023 , H04L27/2613 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus for timing synchronization based on transitional pilot symbols. In an aspect, a method is provided for time tracking synchronization in an OFDM system. The method includes receiving at least one TDM pilot symbol comprising a plurality of modulated sub-carriers that are configured to provide a channel estimate having a length that extends up to a duration of an FFT used for data transmission. The method also includes determining one or both of an instantaneous and averaged channel estimates from the plurality of modulated sub-carriers, and calculating a timing offset based on one or both of the channel estimates. An apparatus includes a receiver configured to receive the at least one TDM pilot symbol, a channel estimator configured to determine the instantaneous and averaged channel estimates, and a time synchronizer configured to calculate a timing offset based on the channel estimates.
摘要翻译：基于过渡导频符号的定时同步的方法和装置。在一方面，提供了一种用于OFDM系统中的时间跟踪同步的方法。该方法包括接收至少一个TDM导频符号，该TDM导频符号包括多个经调制的子载波，其被配置为提供具有延伸到用于数据传输的FFT的持续时间的长度的信道估计。该方法还包括确定来自多个调制子载波的瞬时和平均信道估计中的一个或两个，以及基于信道估计中的一个或两个来计算定时偏移。一种装置包括被配置为接收所述至少一个TDM导频符号的接收机，被配置为确定瞬时和平均信道估计的信道估计器，以及被配置为基于信道估计来计算定时偏移的时间同步器。

9. 发明申请

US20060133388A1 Wide area and local network ID transmission for communication systems 有权
标题翻译：通信系统的广域和本地网络ID传输
公开(公告)号：US20060133388A1
公开(公告)日：2006-06-22
申请号：US11021310
申请日：2004-12-22
申请人： Michael Wang , Bojan Vrcelj , Krishna Mukkavilli , Raghuraman Krishnamoorthi , Rajiv Vijayan
发明人： Michael Wang , Bojan Vrcelj , Krishna Mukkavilli , Raghuraman Krishnamoorthi , Rajiv Vijayan
IPC分类号： H04L12/56
CPC分类号： H04L5/0048 , H04L5/0007 , H04L5/0083 , H04L27/261
摘要： The embodiments utilize OFDM symbols to communicate network IDs. The IDs are encoded into symbols utilizing the network IDs as seeds to scramble respective pilots that are then transmitted by utilizing the symbols. The pilots can be structured into a single OFDM symbol and/or multiple OFDM symbols. The single symbol structure for transmitting the network IDs is independent of the number of network ID bits and minimizes frequency offset and Doppler effects. The multiple symbol structure allows a much coarser timing accuracy to be employed at the expense of transmitting additional symbols. Several embodiments employ a search function to find possible network ID candidates from a transmitted symbol and a selection function to find an optimum candidate from a network ID candidate list.
摘要翻译：这些实施例利用OFDM符号来传送网络ID。 ID被编码成使用网络ID作为种子的符号，以对通过利用符号进行发送的各个导频进行加扰。导频可以被构造成单个OFDM符号和/或多个OFDM符号。用于发送网络ID的单个符号结构与网络ID比特数无关，并且使频偏和多普勒效应最小化。多符号结构允许以牺牲传输附加符号为代价采用更粗糙的定时精度。几个实施例采用搜索功能来从发送的符号和选择功能中找到可能的网络ID候选，以从网络ID候选列表中找到最佳候选。

10. 发明授权

US09008198B2 Methods and apparatus for timing synchronization based on transitional pilot symbols 有权
标题翻译：基于过渡导频符号的定时同步的方法和装置
公开(公告)号：US09008198B2
公开(公告)日：2015-04-14
申请号：US11765428
申请日：2007-06-19
申请人： Bojan Vrcelj , Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi
发明人： Bojan Vrcelj , Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi
IPC分类号： H04K1/10 , H04L27/28 , H04L27/26 , H04L5/00 , H04L7/08 , H04L25/02
CPC分类号： H04L27/2662 , H04L5/0048 , H04L7/08 , H04L25/0216 , H04L25/023 , H04L27/2613 , H04L27/2675 , H04L27/2695
摘要： Methods and apparatus for timing synchronization based on transitional pilot symbols. In an aspect, a method is provided for time tracking synchronization in an OFDM system. The method includes receiving at least one TDM pilot symbol comprising a plurality of modulated sub-carriers that are configured to provide a channel estimate having a length that extends up to a duration of an FFT used for data transmission. The method also includes determining one or both of an instantaneous and averaged channel estimates from the plurality of modulated sub-carriers, and calculating a timing offset based on one or both of the channel estimates. An apparatus includes a receiver configured to receive the at least one TDM pilot symbol, a channel estimator configured to determine the instantaneous and averaged channel estimates, and a time synchronizer configured to calculate a timing offset based on the channel estimates.
摘要翻译：基于过渡导频符号的定时同步的方法和装置。在一方面，提供了一种用于OFDM系统中的时间跟踪同步的方法。该方法包括：接收至少一个TDM导频符号，该TDM导频符号包括多个经调制的子载波，其被配置为提供具有延伸到用于数据传输的FFT的持续时间的长度的信道估计。该方法还包括确定来自多个调制子载波的瞬时和平均信道估计中的一个或两个，以及基于信道估计中的一个或两个来计算定时偏移。一种装置包括被配置为接收所述至少一个TDM导频符号的接收机，被配置为确定瞬时和平均信道估计的信道估计器，以及被配置为基于信道估计来计算定时偏移的时间同步器。

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