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31. 发明授权

US08259865B2 Methods and apparatus for adapting channel estimation in a communication system 有权
标题翻译：在通信系统中适应信道估计的方法和装置
公开(公告)号：US08259865B2
公开(公告)日：2012-09-04
申请号：US12396144
申请日：2009-03-02
申请人： Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Ashok Mantravadi
发明人： Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Ashok Mantravadi
IPC分类号： H04L27/06
CPC分类号： H04L25/0202
摘要： Methods and apparatus for adapting a channel estimation scheme in a transceiver in a communication system are disclosed to adapt channel estimation to the transceiver environment, particularly for high Doppler environments. The disclosed methods and apparatus effect determination of an estimate of a power delay profile of a channel or a time correlation of the channel, or both. A channel estimation scheme is then determined based on at least one of the determined power delay profile and time correlation of the channel. By basing determination of a channel estimation scheme on the power delay profile and/or the time correlation of the channel, the channel estimation scheme is adapted to the particular environment of the transceiver by accounting for the delay spread of the channel and/or the speed of the transceiver.
摘要翻译：公开了用于在通信系统中的收发器中适配信道估计方案的方法和装置，以使信道估计适应收发器环境，特别是对于高多普勒环境。所公开的方法和装置效应确定信道的功率延迟分布的估计或信道的时间相关性，或两者。然后基于所确定的功率延迟分布和信道的时间相关性中的至少一个来确定信道估计方案。通过基于信道估计方案对功率延迟分布的确定和/或信道的时间相关性，信道估计方案通过考虑信道的延迟扩展和/或速度来适应收发器的特定环境的收发器。

32. 发明授权

US08249203B2 Truncation of noisy taps in channel estimation 有权
标题翻译：截取通道估计中的噪声水龙头
公开(公告)号：US08249203B2
公开(公告)日：2012-08-21
申请号：US12235553
申请日：2008-09-22
申请人： Thomas Sun , Raghuraman Krishnamoorthi , Fuyun Ling , Krishna Kiran Mukkavilli , Tao Tian , Bojan Vrcelj
发明人： Thomas Sun , Raghuraman Krishnamoorthi , Fuyun Ling , Krishna Kiran Mukkavilli , Tao Tian , Bojan Vrcelj
IPC分类号： H04B1/10
CPC分类号： H04L25/0212 , H04L25/0204 , H04L25/0216
摘要： Methods and systems are described for processing a signal in wireless communications. The signal may have synchronization information. A method of processing a signal having synchronization information may include receiving the signal, and determining a truncation region of the time domain estimated channel, the estimated channel having taps. The method further includes processing the channel taps within the truncation region.
摘要翻译：描述了用于处理无线通信中的信号的方法和系统。该信号可以具有同步信息。处理具有同步信息的信号的方法可以包括接收信号，以及确定时域估计信道的截断区域，估计信道具有抽头。该方法还包括处理截断区域内的信道抽头。

33. 发明申请

US20110044411A1 METHODS AND APPARATUSES FOR REDUCING INTER-CARRIER INTERFERENCE IN AN OFDM SYSTEM 审中-公开
标题翻译：用于减少OFDM系统中的载波间干扰的方法和装置
公开(公告)号：US20110044411A1
公开(公告)日：2011-02-24
申请号：US12916400
申请日：2010-10-29
申请人： Tao TIAN , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
发明人： Tao TIAN , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
IPC分类号： H04B1/10
CPC分类号： H04L27/2657
摘要： An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.
摘要翻译： OFDM电信系统包括发射机和接收机。接收机包括被配置为减少频域中的OFDM符号中的载波间干扰（ICI）的消除器。

34. 发明申请

US20090245154A1 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：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
IPC分类号： H04H20/71 , H04J11/00
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。

35. 发明申请

US20090028257A1 METHOD AND APPARATUS FOR INITIAL ACQUISITION OF SIGNALING PARAMETERS FOR A WIRELESS COMMUNICATIONS NETWORK 有权
标题翻译：用于无线通信网络的信号参数初始采集的方法和装置
公开(公告)号：US20090028257A1
公开(公告)日：2009-01-29
申请号：US11834669
申请日：2007-08-06
申请人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Tao Tian
发明人： Krishna Kiran Mukkavilli , Ashok Mantravadi , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Tao Tian
IPC分类号： H04K1/10
CPC分类号： H04W48/16 , H04L27/2647
摘要： A method of acquiring a forward link only (FLO) network in a radio frequency (RF) in a wireless communication environment, includes selecting a RF from a first list; selecting a signal parameter (SP) from a second list; determining if a first parameter is found using the selected RF and SP; and, upon determination that the first parameter is found, enabling the use of the selected RF and SP to communicate in the FLO network. An apparatus for implementing the method is also disclosed.
摘要翻译：一种在无线通信环境中在射频（RF）中获取前向链路（FLO）网络的方法，包括从第一列表中选择RF; 从第二列表中选择信号参数（SP）; 使用所选择的RF和SP确定是否发现第一参数; 并且在确定发现第一参数之后，使所选择的RF和SP能够在FLO网络中进行通信。还公开了一种用于实现该方法的装置。

36. 发明申请

US20090028256A1 METHOD AND APPARATUS FOR SENSING SIGNALING PARAMETERS IN A WIRELESS COMMUNICATIONS NETWORK 有权
标题翻译：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。

37. 发明申请

US20080159449A1 METHODS AND APPARATUSES FOR REDUCING INTER-CARRIER INTERFERENCE IN AN OFDM SYSTEM 失效
标题翻译：用于减少OFDM系统中的载波间干扰的方法和装置
公开(公告)号：US20080159449A1
公开(公告)日：2008-07-03
申请号：US11674632
申请日：2007-02-13
申请人： Tao Tian , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
发明人： Tao Tian , Raghuraman Krishnamoorthi , Krishna Kiran Mukkavilli , Fuyun Ling
IPC分类号： H04L25/08
CPC分类号： H04L27/2657
摘要： An OFDM telecommunications system includes a transmitter and a receiver. The receiver includes a canceller configured to reduce inter-carrier interference (ICI) in an OFDM symbol in the frequency domain.
摘要翻译： OFDM电信系统包括发射机和接收机。接收机包括被配置为减少频域中的OFDM符号中的载波间干扰（ICI）的消除器。

38. 发明申请

US20080123540A1 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：US20080123540A1
公开(公告)日：2008-05-29
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： 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）。

39. 发明申请

US20130156124A1 SYSTEM AND METHOD FOR FREQUENCY DIVERSITY 有权
标题翻译：频域多样性的系统与方法
公开(公告)号：US20130156124A1
公开(公告)日：2013-06-20
申请号：US13767834
申请日：2013-02-14
申请人： Michael Mao Wang , Murali Ramaswamy Chari , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Raghuraman Krishnamoorthi
发明人： Michael Mao Wang , Murali Ramaswamy Chari , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Raghuraman Krishnamoorthi
IPC分类号： H04L27/26
CPC分类号： H04L27/2601 , H03M13/258 , H03M13/271 , H03M13/2957 , H03M13/31 , H04L1/0071 , H04L1/04 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L5/0064 , H04L5/0083 , H04L27/2626 , H04L27/2634
摘要： A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved in the bit reversal fashion.
摘要翻译：用于频率分集的系统和方法使用利用具有各种FFT大小的正交频分复用（OFDM）的无线通信系统中的交织。一个或多个交错的子载波以位反向方式进行交织，并且该一个或多个交织以比特反转方式进行交织。

40. 发明授权

US07746760B2 Frequency error estimation and frame synchronization in an OFDM system 失效
标题翻译： OFDM系统中的频率误差估计和帧同步
公开(公告)号：US07746760B2
公开(公告)日：2010-06-29
申请号：US10754796
申请日：2004-01-08
申请人： Rajiv Vijayan , Alok Kumar Gupta , Raghuraman Krishnamoorthi
发明人： Rajiv Vijayan , Alok Kumar Gupta , Raghuraman Krishnamoorthi
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04L27/2656 , H04L27/2657 , H04L27/2675
摘要： Frequency error estimation and frame synchronization are performed at a receiver in an OFDM system based on a metric that is indicative of detected pilot power. The metric may be defined based on cross-correlation between two received symbols obtained in two OFDM symbol periods. For frequency error estimation, a metric value is computed for each of multiple hypothesized frequency errors. The hypothesized frequency error for the metric value with the largest magnitude is provided as the estimated frequency error. For frame synchronization, a correlation value is obtained for each OFDM symbol period by correlating metric values obtained for NC (e.g., most recent) OFDM symbol periods with NC expected values. The expected values are computed in a manner consistent with the manner in which the metric values are computed. Peak detection is performed on the correlation values obtained for different OFDM symbol periods to determine frame synchronization.
摘要翻译：基于指示检测到的导频功率的度量，在OFDM系统中的接收机处执行频率误差估计和帧同步。可以基于在两个OFDM符号周期中获得的两个接收符号之间的互相关来定义度量。对于频率误差估计，针对多个假设的频率误差中的每一个计算度量值。提供具有最大幅度的度量值的假设频率误差作为估计的频率误差。对于帧同步，通过将为NC（例如，最近的）OFDM符号周期获得的度量值与NC预期值相关联，获得每个OFDM符号周期的相关值。以与计算度量值的方式一致的方式计算期望值。对针对不同的OFDM符号周期获得的相关值执行峰值检测以确定帧同步。

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