公开(公告)号：US07746963B2

公开(公告)日：2010-06-29

申请号：US11557921

申请日：2006-11-08

Applicant: Seong Taek Chung ,  Krishna Kiran Mukkavilli ,  Vinay Murthy ,  Tao Tian

Inventor： Seong Taek Chung ,  Krishna Kiran Mukkavilli ,  Vinay Murthy ,  Tao Tian

IPC: H04L27/00

CPC classification number: H04L27/2657 ,  H04L27/2675

Abstract: Methods and apparatus for frequency tracking of a received signal. In an aspect, a method is provided wherein the received signal comprises one or more symbols having a periodic structure. The method comprises receiving a plurality of samples of a selected symbol that comprises pilot signals scrambled with data and determining a window size and a periodicity factor. The method also comprises accumulating a correlation between samples in a first window and samples in a second window to produce an accumulated correlation value, wherein the first and second windows have a size and a separation based on the window size and the periodicity factor, respectively, and deriving a frequency error estimate based on the accumulated correlation value.

Abstract translation: 接收信号频率跟踪的方法和装置。 在一方面，提供了一种方法，其中接收的信号包括具有周期性结构的一个或多个符号。 该方法包括：接收包含由数据加扰的导频信号和确定窗口大小和周期因子的所选符号的多个样本。 该方法还包括在第一窗口中累积样本之间的相关性并在第二窗口中采样以产生累加的相关值，其中第一和第二窗口分别具有基于窗口大小和周期性因子的大小和间隔， 以及基于所累积的相关值导出频率误差估计。

公开(公告)号：US07720027B2

公开(公告)日：2010-05-18

申请号：US11495480

申请日：2006-07-27

Applicant: Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Kumar Gupta ,  Krishna Kiran Mukkavilli ,  Michael Mao Wang ,  Bojan Vrcelj ,  Bruce Collins

Inventor： Fuyun Ling ,  Murali Ramaswamy Chari ,  Rajiv Vijayan ,  Ashok Mantravadi ,  Alok Kumar Gupta ,  Krishna Kiran Mukkavilli ,  Michael Mao Wang ,  Bojan Vrcelj ,  Bruce Collins

IPC: H04W4/00

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07706328B2

公开(公告)日：2010-04-27

申请号：US11517119

申请日：2006-09-06

Applicant: Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

Inventor： Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

IPC: H04W4/00 ,  H04W24/00

CPC classification number: G01S5/0205 ,  H04L5/0053 ,  H04W24/00 ,  H04W64/00

Abstract: Methods and apparatus for position location in a wireless network. In an aspect, a method is provided that includes determining whether a symbol to be transmitted is an active symbol, wherein the symbol comprises a plurality of subcarriers, and encoding identification information on a first portion of subcarriers if it is determined that the symbol is the active symbol. The method also includes encoding idle information on a second portion of subcarriers if it is determined that the symbol in not the active symbol. In an aspect, an apparatus includes detector logic configured to decode a plurality of symbols to determine identification information that identifies a plurality of transmitters, and to determine a plurality of channel estimate associated with the plurality of transmitters. The apparatus also includes position determination logic configured to calculate a device position based on the plurality of transmitters and the plurality of channel estimates.

Abstract translation: 无线网络中位置定位的方法和装置。 一方面，提供了一种方法，其包括确定要发送的符号是否是活动符号，其中，所述符号包括多个子载波，并且如果确定所述符号是所述符号是所述符号，则对所述子载波的第一部分编码识别信息 活动符号 如果确定不在活动符号中的符号，则该方法还包括对子载波的第二部分上的空闲信息进行编码。 一方面，一种装置包括检测器逻辑，其被配置为对多个符号进行解码以确定标识多个发射机的识别信息，并且确定与多个发射机相关联的多个信道估计。 该装置还包括位置确定逻辑，其被配置为基于多个发射机和多个信道估计来计算设备位置。

公开(公告)号：US20090190525A1

公开(公告)日：2009-07-30

申请号：US12165653

申请日：2008-07-01

Applicant: Krishna Kiran Mukkavilli ,  Ashok Mantravadi

Inventor： Krishna Kiran Mukkavilli ,  Ashok Mantravadi

IPC: H04W8/00

CPC classification number: H04L5/0048 ,  H04L1/0057 ,  H04L1/0072 ,  H04L5/0007 ,  H04L5/0053

Abstract: A method for communicating transmitter identification in an interlace structure of a communication network system using positioning pilot channels (PPC), comprising: a) encoding pilot information on a first portion of a plurality of subcarriers in a positioning pilot channel symbol for an active transmitter; and b) encoding transmitter identification information on a second portion of a plurality of subcarriers of the symbol; wherein the first portion of the plurality of subcarriers comprises at least first and second interlaces and the second portion of the plurality of subcarriers comprises at least a third interlace; the pilot information is scrambled in the first interlace with a wide area identifier and scrambled in the at least second interlaces with the wide area identifier and a local area identifier; and wherein at least one of the interlace includes the transmitter identification information in the form of one or more transmitter location coordinates in a free interlace.

Abstract translation: 一种用于使用定位导频信道（PPC）在通信网络系统的交错结构中传送发射机识别的方法，包括：a）在有源发射机的定位导频信道符号中的多个子载波的第一部分上编码导频信息; 以及b）在所述符号的多个子载波的第二部分上编码发射机识别信息; 其中所述多个子载波的所述第一部分包括至少第一和第二交织，并且所述多个子载波的所述第二部分包括至少第三交错; 导频信息在具有广域标识符的第一交错中被加扰，并且在具有广域标识符和局域标识符的至少第二交错中加扰; 并且其中所述交错中的至少一个以自由交错的一个或多个发射机位置坐标的形式包括所述发射机识别信息。

公开(公告)号：US20090117917A1

公开(公告)日：2009-05-07

申请号：US12338901

申请日：2008-12-18

Applicant: Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

Inventor： Krishna Kiran Mukkavilli ,  Fuyun Ling ,  Gordon Kent Walker ,  Murali Ramaswamy Chari

IPC: H04W24/00

CPC classification number: G01S5/0205 ,  H04L5/0053 ,  H04W24/00 ,  H04W64/00

Abstract: Methods and apparatus for position location in a wireless network. In an aspect, a method is provided that includes determining whether a symbol to be transmitted is an active symbol, wherein the symbol comprises a plurality of subcarriers, and encoding identification information on a first portion of subcarriers if it is determined that the symbol is the active symbol. The method also includes encoding idle information on a second portion of subcarriers if it is determined that the symbol in not the active symbol. In an aspect, an apparatus includes detector logic configured to decode a plurality of symbols to determine identification information that identifies a plurality of transmitters, and to determine a plurality of channel estimate associated with the plurality of transmitters. The apparatus also includes position determination logic configured to calculate a device position based on the plurality of transmitters and the plurality of channel estimates.

Abstract translation: 无线网络中位置定位的方法和装置。 一方面，提供了一种方法，其包括确定要发送的符号是否是活动符号，其中，所述符号包括多个子载波，并且如果确定所述符号是所述符号是所述符号，则对所述子载波的第一部分编码识别信息 活动符号 如果确定不在活动符号中的符号，则该方法还包括对子载波的第二部分上的空闲信息进行编码。 一方面，一种装置包括检测器逻辑，其被配置为对多个符号进行解码以确定标识多个发射机的识别信息，并且确定与多个发射机相关联的多个信道估计。 该装置还包括位置确定逻辑，其被配置为基于多个发射机和多个信道估计来计算设备位置。

公开(公告)号：US20080260008A1

公开(公告)日：2008-10-23

申请号：US11970381

申请日：2008-01-07

Applicant: Bojan Vrcelj ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

Inventor： Bojan Vrcelj ,  Ashok Mantravadi ,  Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi

IPC: H04B1/707

CPC classification number: H04L27/2662 ,  H04L25/0216 ,  H04L25/0224 ,  H04L27/2675 ,  H04L27/2695

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20230084164A1

公开(公告)日：2023-03-16

申请号：US17801505

申请日：2020-04-17

Applicant: Bo CHEN ,  Pavan Kumar THALADEVUNI ,  Taesang YOO ,  Naga BHUSHAN ,  Jay Kumar SUNDARARAJAN ,  Ruifeng MA ,  June NAMGOONG ,  Krishna Kiran MUKKAVILLI ,  Tingfang JI ,  Hao XU ,  QUALCOMM Incorporated

Inventor： Bo CHEN ,  Pavan Kumar VITTHALADEVUNI ,  Taesang YOO ,  Naga BHUSHAN ,  Jay Kumar SUNDARARAJAN ,  Ruifeng MA ,  June NAMGOONG ,  Krishna Kiran MUKKAVILLI ,  Hao XU ,  Tingfang JI

IPC: H04B7/06

Abstract: A method of wireless communication, by a user equipment (UE), includes receiving multiple neural network training configurations for channel state feedback (CSF). Each configuration corresponds to a different neural network framework. The method also includes training each of a group of neural network decoder/encoder pairs in accordance with the received training configurations. A method of wireless communication, by a base station, includes transmitting multiple neural network training configurations to a user equipment (UE) for channel state feedback (CSF). Each configuration corresponds to a different neural network framework. The method also includes receiving a neural network decoder/encoder pair trained in accordance with the training configurations.

公开(公告)号：US20220400511A1

公开(公告)日：2022-12-15

申请号：US17776554

申请日：2019-11-28

Applicant: Qiaoyu LI ,  Jing LEI ,  Chao WEI ,  Wanshi CHEN ,  Umesh PHUYAL ,  Peter Pui Lok ANG ,  Krishna Kiran MUKKAVILLI ,  Hao XU ,  Qualcomm Incorporated

Inventor： Qiaoyu LI ,  Jing LEI ,  Chao WEI ,  Wanshi CHEN ,  Umesh PHUYAL ,  Peter Pui Lok ANG ,  Krishna KIRAN MUKKAVILLI ,  Hao XU

IPC: H04W74/00 ,  H04W24/08

Abstract: Methods, systems, and devices for wireless communications are described. A group of random access channel opportunities are identified over which to transmit a preamble associated with a random access channel procedure. A preamble sequence group associated with the identified group of random access channel opportunities is determined based on a repetition level associated with the preamble sequence group. At least one downlink message associated with the random access channel procedure is received based on the repetition level.

公开(公告)号：US09354297B2

公开(公告)日：2016-05-31

申请号：US11326868

申请日：2006-01-05

Applicant: Fuyun Ling ,  Gordon Kent Walker ,  Krishna Kiran Mukkavilli

Inventor： Fuyun Ling ,  Gordon Kent Walker ,  Krishna Kiran Mukkavilli

IPC: G01S5/14 ,  G01S5/02 ,  H04W64/00 ,  G01S1/02

CPC classification number: G01S5/021 ,  G01S1/024 ,  G01S5/0226 ,  G01S5/14 ,  H04W64/00

Abstract: Systems and methods are provided for determining position location information in a wireless network. In one embodiment, timing offset information is communicated between multiple transmitters and one or more receivers. Such information enables accurate position or location determinations to be made that account for timing differences throughout the network. In another embodiment, transmitter phase adjustments are made that advance or delay transmissions from the transmitters to account for potential timing differences at receivers. In yet another embodiment, combinations of timing offset communications and/or transmitter phase adjustments can be employed in the wireless network to facilitate position location determinations.

Abstract translation: 提供了用于确定无线网络中的位置信息的系统和方法。 在一个实施例中，在多个发射机和一个或多个接收机之间传送定时偏移信息。 这样的信息使得可以进行精确的位置或位置确定，从而考虑整个网络的时序差异。 在另一个实施例中，进行发射机相位调整，其推进或延迟来自发射机的传输以考虑接收机处的潜在时序差异。 在另一个实施例中，可以在无线网络中采用定时偏移通信和/或发射机相位调整的组合以便于位置定位确定。

公开(公告)号：US09008198B2

公开(公告)日：2015-04-14

申请号：US11765428

申请日：2007-06-19

Applicant: Bojan Vrcelj ,  Krishna Kiran Mukkavilli ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

Inventor： Bojan Vrcelj ,  Krishna Kiran Mukkavilli ,  Ashok Mantravadi ,  Raghuraman Krishnamoorthi

IPC: H04K1/10 ,  H04L27/28 ,  H04L27/26 ,  H04L5/00 ,  H04L7/08 ,  H04L25/02

CPC classification number: H04L27/2662 ,  H04L5/0048 ,  H04L7/08 ,  H04L25/0216 ,  H04L25/023 ,  H04L27/2613 ,  H04L27/2675 ,  H04L27/2695

Abstract: 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.

Abstract translation: 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。