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61. 发明授权

US07746963B2 Methods and apparatus for frequency tracking of a received signal 有权
标题翻译：接收信号频率跟踪的方法和装置
公开(公告)号：US07746963B2
公开(公告)日：2010-06-29
申请号：US11557921
申请日：2006-11-08
申请人： Seong Taek Chung , Krishna Kiran Mukkavilli , Vinay Murthy , Tao Tian
发明人： Seong Taek Chung , Krishna Kiran Mukkavilli , Vinay Murthy , Tao Tian
IPC分类号： H04L27/00
CPC分类号： H04L27/2657 , H04L27/2675
摘要： 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.
摘要翻译：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。

62. 发明申请

US20220021434A1 SEQUENCE BASED UPLINK CONTROL CHANNEL COEXISTENCE 有权
公开(公告)号：US20220021434A1
公开(公告)日：2022-01-20
申请号：US17356232
申请日：2021-06-23
申请人： Yi Huang , Peter Gaal , Wei Yang , Tingfang Ji , Hwan Joon Kwon , Krishna Kiran Mukkavilli , Wanshi Chen
发明人： Yi Huang , Peter Gaal , Wei Yang , Tingfang Ji , Hwan Joon Kwon , Krishna Kiran Mukkavilli , Wanshi Chen
IPC分类号： H04B7/06 , H04B7/0456 , H04W72/12 , H04L27/26
摘要： Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a configuration signal indicating a codebook construction configuration for constructing a codebook of sequences for conveying a first type of uplink payload in a resource block that is orthogonal to a second type of uplink payload transmitted from a second UE in the resource block. The UE may construct the codebook of sequences for the first type of uplink payload according to the codebook construction configuration. The UE may generate the first type of uplink payload for transmission using a first sequence from the codebook of sequences. The UE may transmit the first type of uplink payload in the resource block, wherein the first type of uplink payload is multiplexed in the resource block with the second type of uplink payload from the second UE.

63. 发明申请

US20100002817A1 METHOD AND APPARATUS FOR ADAPTIVE TIMING SYNCHRONIZATION IN A COMMUNICATION NETWORK 失效
标题翻译：用于通信网络中自适应时序同步的方法和装置
公开(公告)号：US20100002817A1
公开(公告)日：2010-01-07
申请号：US12324818
申请日：2008-11-26
申请人： Bojan Vrcelj , Krishna Kiran Mukkavilli
发明人： Bojan Vrcelj , Krishna Kiran Mukkavilli
IPC分类号： H04L7/00
CPC分类号： H04L25/0212 , H04L27/2662 , H04L27/2665
摘要： An adaptive timing synchronization process dynamically adapts timing synchronization parameters for both wide and local area channels based on channel estimates. Timing synchronization parameters are dynamically adapted according to C/I estimates calculated from WID/LID energies. The timing synchronization algorithm 102 takes as the primary input, the current channel estimate 110 and produces an output comprising a correction to the current Fast Fourier Transform (FFT) sampling window position delta T (or offset) for locating the start of data within a current symbol 108. After dynamic parameter adjustment of noise filtering thresholds 104 and weak channel tap sensitivities 106 based on a calculated C/I from the channel estimate, a timing synchronization algorithm 102 locates the beginning of each continuous symbol by finding the boundary between the preamble, or cyclic prefix, and the useful data portions interlaced with pilots for channel information defining the start of a symbol 108.
摘要翻译：基于信道估计，自适应定时同步过程动态地适应广域和局域信道的定时同步参数。定时同步参数根据从WID / LID能量计算的C / I估计动态调整。定时同步算法102将当前信道估计110作为主要输入，并产生包括对当前快速傅立叶变换（FFT）采样窗位置增量T（或偏移）的校正的输出，用于定位当前数据的开始基于来自信道估计的计算出的C / I，在噪声滤波阈值104和弱信道抽头灵敏度106的动态参数调整之后，定时同步算法102通过找到前导码之间的边界来定位每个连续符号的开始，或循环前缀，并且有用数据部分与用于定义符号108的开始的信道信息的导频隔行扫描。

64. 发明授权

US07336727B2 Generalized m-rank beamformers for MIMO systems using successive quantization 有权
标题翻译：使用连续量化的MIMO系统的广义m级波束形成器
公开(公告)号：US07336727B2
公开(公告)日：2008-02-26
申请号：US10923056
申请日：2004-08-19
申请人： Krishna Kiran Mukkavilli , Ashutosh Sabharwal , Behnaam Aazhang
发明人： Krishna Kiran Mukkavilli , Ashutosh Sabharwal , Behnaam Aazhang
IPC分类号： H04L27/00
CPC分类号： H04B7/0417 , H04B7/043 , H04B7/0443 , H04B7/0634 , H04B7/0639 , H04B7/0663
摘要： The telecommunications system described herein implements a multi-rank beamformer for use in wireless systems equipped with multiple transmit and multiple receive antennas. The multi-rank beamformer uses finite-rate feedback of channel conditions to achieves close to theoretical performance indicated by the water-filling algorithm, while avoiding the computational complexity associated with space time codes. In addition, the multi-rank beamforming system described herein improves on the performance of unit rank beamforming methods by maintaining the gains over space time codes over a broader range of transmission rates.
摘要翻译：本文描述的电信系统实现用于配备有多个发射和多个接收天线的无线系统中的多等级波束形成器。多级波束形成器使用信道条件的有限速率反馈来实现接近灌水算法所指示的理论性能，同时避免与时空码相关的计算复杂度。另外，本文描述的多级波束成形系统通过在更宽的传输速率范围内保持空间时间码的增益来改善单位秩波束成形方法的性能。

65. 发明授权

US07330701B2 Low complexity beamformers for multiple transmit and receive antennas 失效
标题翻译：用于多个发射和接收天线的低复杂度波束形成器
公开(公告)号：US07330701B2
公开(公告)日：2008-02-12
申请号：US10533248
申请日：2003-10-29
申请人： Krishna Kiran Mukkavilli , Ashutosh Sabharwal , Behnaam Aazhang
发明人： Krishna Kiran Mukkavilli , Ashutosh Sabharwal , Behnaam Aazhang
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04B7/0639 , H01Q21/00 , H04B7/0443 , H04B7/0617 , H04B7/0669 , H04W52/42
摘要： Beamforming systems having a few bits of channel state information fed back to the transmitter benefit from low complexity decoding structures and performances gains compared with systems that do not have channel state feedback. Both unit rank and higher rank systems are implemented. Substantial design effort may be avoided by following a method of using functions formulated for space-time systems with the change that the channel coherence time is equated to the number of transmit antennas and the number of antennas in the space-time formulation is fixed at one.
摘要翻译：具有反馈到发射机的几比特信道状态信息的波束成形系统与没有信道状态反馈的系统相比，受益于低复杂性解码结构和性能增益。实现了单位级和高级制。通过遵循使用为空时系统制定的功能的方法可以避免大量的设计努力，其中信道相干时间等于发射天线的数量，并且时空公式中的天线数量固定在一个。

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