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51. 发明授权

US09301313B2 Method and apparatus for data transmission with user selection 有权
标题翻译：用户选择的数据传输方法和装置
公开(公告)号：US09301313B2
公开(公告)日：2016-03-29
申请号：US13159158
申请日：2011-06-13
申请人： Alexei Ashikhmin , Philip A. Whiting
发明人： Alexei Ashikhmin , Philip A. Whiting
IPC分类号： H04H20/71 , H04W72/12 , H04W8/28 , H04W74/04
CPC分类号： H04W72/121 , H04W8/28 , H04W74/04
摘要： Various methods and devices are provided to address the need for improved data transmission with coherence interval user selection. In one method, a transmit group to which to transmit during a first coherence time interval is selected. The transmit group is selected (101) from a plurality of users for which there is data to transmit during the first coherence time interval. The data associated with users in the transmit group is transmitted (102) to the transmit group during the first coherence time interval. Subsequent transmit groups to which to transmit during subsequent coherence time intervals are also selected (103). A user of the plurality of users is selected for transmission over the course of the first coherence time interval and the subsequent coherence time intervals with a predetermined probability.
摘要翻译：提供了各种方法和设备，以满足对相干间隔用户选择的改进的数据传输的需要。在一种方法中，选择在第一相干时间间隔期间要发射的发射组。从在第一相干时间间隔期间要发送的数据的多个用户中选择（101）发送组。在第一相干时间间隔期间，将与发送组中的用户相关联的数据发送（102）到发送组。还选择在随后的相干时间间隔期间要发送的后续发送组（103）。选择多个用户的用户在第一相干时间间隔的过程和随后的相干时间间隔中以预定的概率进行传输。

52. 发明申请

US20120314735A1 Method And Apparatus For Data Transmission With User Selection 有权
标题翻译：用户选择的数据传输方法和装置
公开(公告)号：US20120314735A1
公开(公告)日：2012-12-13
申请号：US13159158
申请日：2011-06-13
申请人： Alexei Ashikhmin , Philip A. Whiting
发明人： Alexei Ashikhmin , Philip A. Whiting
IPC分类号： H04L1/00 , H04B1/38 , H04B1/62
CPC分类号： H04W72/121 , H04W8/28 , H04W74/04
摘要： Various methods and devices are provided to address the need for improved data transmission with coherence interval user selection. In one method, a transmit group to which to transmit during a first coherence time interval is selected. The transmit group is selected (101) from a plurality of users for which there is data to transmit during the first coherence time interval. The data associated with users in the transmit group is transmitted (102) to the transmit group during the first coherence time interval. Subsequent transmit groups to which to transmit during subsequent coherence time intervals are also selected (103). A user of the plurality of users is selected for transmission over the course of the first coherence time interval and the subsequent coherence time intervals with a predetermined probability.
摘要翻译：提供了各种方法和设备，以满足对相干间隔用户选择的改进的数据传输的需要。在一种方法中，选择在第一相干时间间隔期间要发射的发射组。从在第一相干时间间隔期间要发送的数据的多个用户中选择（101）发送组。在第一相干时间间隔期间，将与发送组中的用户相关联的数据发送（102）到发送组。还选择在随后的相干时间间隔期间要发送的后续发送组（103）。选择多个用户的用户在第一相干时间间隔的过程和随后的相干时间间隔中以预定的概率进行传输。

53. 发明授权

US08300726B2 Interpolation method and apparatus for increasing efficiency of crosstalk estimation 有权
标题翻译：用于提高串扰估计效率的插值方法和装置
公开(公告)号：US08300726B2
公开(公告)日：2012-10-30
申请号：US11934347
申请日：2007-11-02
申请人： Alexei Ashikhmin , Adriaan J. De Lind Van Wijngaarden , Gerhard Guenter Theodor Kramer , Philip Alfred Whiting , Miroslav Zivkovic
发明人： Alexei Ashikhmin , Adriaan J. De Lind Van Wijngaarden , Gerhard Guenter Theodor Kramer , Philip Alfred Whiting , Miroslav Zivkovic
IPC分类号： H04K1/02
CPC分类号： H04B3/32 , H04B3/487
摘要： Techniques are disclosed that efficiently obtain channel crosstalk estimates in DSL systems and other communication systems that may include unsynchronized channels. For example, a method includes obtaining a first set of estimated measures of crosstalk for a first portion of a plurality of communication channels over which data signals are to be transmitted from a transmitter to a plurality of receivers, and interpolating a second set of estimated measures of crosstalk for a second portion of the plurality of communication channels based on the first set of estimated measures of crosstalk. The first portion of the plurality of communication channels may be a subset of the plurality of communication channels and the second portion of the plurality of communication channels is a remainder of the plurality of communication channels. Each estimated measure of crosstalk may relate to at least one tone associated with at least one of the plurality of communication channels.
摘要翻译：公开了在DSL系统和可能包括不同步信道的其他通信系统中有效地获得信道串扰估计的技术。例如，一种方法包括获得第一组估计的多个通信信道的第一部分的串扰测量值，数据信号将从该发送器发送到多个接收机，并且内插第二组估计度量基于所述第一组估计的串扰测量值，所述多个通信信道的第二部分的串扰。多个通信信道的第一部分可以是多个通信信道的子集，并且多个通信信道的第二部分是多个通信信道的剩余部分。每个估计的串扰测量可以涉及与多个通信信道中的至少一个相关联的至少一个音调。

54. 发明授权

US08300518B2 Fast seamless joining of channels in a multi-channel communication system 有权
标题翻译：在多通道通信系统中快速无缝连接通道
公开(公告)号：US08300518B2
公开(公告)日：2012-10-30
申请号：US12060653
申请日：2008-04-01
申请人： Alexei Ashikhmin , Adriaan J. De Lind Van Wijngaarden , Gerhard Guenter Theodor Kramer , Carl Jeremy Nuzman , Philip Alfred Whiting
发明人： Alexei Ashikhmin , Adriaan J. De Lind Van Wijngaarden , Gerhard Guenter Theodor Kramer , Carl Jeremy Nuzman , Philip Alfred Whiting
IPC分类号： H04J3/10
CPC分类号： H04M3/18 , H04M3/30 , H04M3/34 , H04M2203/058
摘要： At least one channel is joined to a group of active channels in a communication system by transmitting control signals to configure respective customer premises equipment (CPE) of the active channels into a joining mode of operation, and transmitting a joining signature sequence to CPE of the joining channel over a downstream data signal path of the joining channel. A central office (CO) or other access node of the system receives correlation results from respective active channel CPE, estimates crosstalk from the joining channel into the active channels based on the correlation results, configures a precoder based on the estimated crosstalk, and adds the joining channel to the group of active channels. The channels may comprise respective subscriber lines of a DSL communication system.
摘要翻译：通过发送控制信号将至少一个信道连接到通信系统中的一组活动信道，以将活动信道的相应客户驻地设备（CPE）配置为加入操作模式，并将加入签名序列发送到在加入信道的下游数据信号路径上加入信道。该系统的中心局（CO）或其他接入节点从相应的有源信道CPE接收相关结果，基于相关结果估计从加入信道到有源信道的串扰，基于所估计的串扰配置预编码器，加入频道到活跃频道组。信道可以包括DSL通信系统的相应用户线路。

55. 发明授权

US07995668B2 Method and apparatus for quantizing complex vectors in communication system 有权
标题翻译：通信系统中复数向量的量化方法和装置
公开(公告)号：US07995668B2
公开(公告)日：2011-08-09
申请号：US11766927
申请日：2007-06-22
申请人： Alexei Ashikhmin
发明人： Alexei Ashikhmin
IPC分类号： H04B7/02 , H04L23/02
CPC分类号： H04B7/0417 , H04B7/0452 , H04B7/0639 , H04B7/0663
摘要： Improved techniques are disclosed for quantizing complex vectors in communication systems. For example, a method includes the following steps. At least one complex vector representative of at least one element of a communication system is obtained. A codeword that approximates the complex vector is identified. The identified codeword is a codeword, from a set of codewords, wherein a real part of a product of the codeword and a scaled version of the complex vector is about maximal over the set of codewords. The scaled version of the complex vector is the product of the complex vector and a constant from a set of constants. In one embodiment, the element of the communication system that the complex vector represents is a channel between a base station and a user terminal in the communication system.
摘要翻译：公开了改进的技术来量化通信系统中的复杂向量。例如，一种方法包括以下步骤。获得代表通信系统的至少一个元件的至少一个复数向量。识别近似复数向量的码字。识别的码字是来自一组码字的码字，其中码字的乘积的实部和复矢量的缩放版本在码字集合上大约是最大的。复数向量的缩放版本是复数向量的乘积和来自一组常量的常数。在一个实施例中，复向量表示的通信系统的元素是通信系统中的基站和用户终端之间的信道。

56. 发明申请

US20080291989A1 Crosstalk Estimation Methods and Apparatus Using Auxiliary Time-Domain Signals 有权
标题翻译：使用辅助时域信号的串扰估计方法和装置
公开(公告)号：US20080291989A1
公开(公告)日：2008-11-27
申请号：US11753332
申请日：2007-05-24
申请人： Alexei Ashikhmin , Philip Alfred Whiting , Adriaan J. De Lind Van Wijngaarden
发明人： Alexei Ashikhmin , Philip Alfred Whiting , Adriaan J. De Lind Van Wijngaarden
IPC分类号： H04B17/00 , H04J1/12 , H04L27/28
CPC分类号： H04B3/487 , H04L27/2601
摘要： Techniques are disclosed for measuring crosstalk between at least two communication channels of a communication system. A receiver of the system receives a signal over a given one of the communication channels from a transmitter of the system. The receiver correlates the received signal with a sequence of time-domain signals associated with another of the communication channels, and generates a measure of crosstalk between the given communication channel and the other communication channel based on the correlation between the received signal and the sequence of time-domain signals. The sequence of time-domain signals may be selected from a designated set of M-sequences.
摘要翻译：公开了用于测量通信系统的至少两个通信信道之间的串扰的技术。系统的接收机从系统的发射器接收通过给定的一个通信信道的信号。接收器将接收到的信号与与另一个通信信道相关联的时域信号序列进行相关，并且基于接收信号和序列之间的相关性，生成给定通信信道与另一通信信道之间的串扰量度时域信号。可以从指定的一组M序列中选择时域信号的序列。

57. 发明申请

US20050182994A1 Method and apparatus for link error prediction in a communication system 有权
标题翻译：通信系统中链路误差预测的方法和装置
公开(公告)号：US20050182994A1
公开(公告)日：2005-08-18
申请号：US10778765
申请日：2004-02-13
申请人： Alexei Ashikhmin , Adriaan Van Wijngaarden , Nandu Gopalakrishnan , Jaehyeong Kim , Emina Soljanin
发明人： Alexei Ashikhmin , Adriaan Van Wijngaarden , Nandu Gopalakrishnan , Jaehyeong Kim , Emina Soljanin
IPC分类号： H03M13/47 , H04L1/16 , H04L1/18 , H04L1/20
CPC分类号： H04L1/1819 , H04L1/1845 , H04L1/20
摘要： A method is provided to accurately predict the probability of successfully recovering frames of (coded) information received over a wireless link, without having to decode the frame. This method, which consists of three steps, requires only limited information about the received signals and the forward error correction code and retransmission scheme being used. First, the signal to noise ratio (SNR) of each of the received signals is measured, where the average SNR is determined for multiple segments that together constitute the frame. Next, an algorithm is employed that takes these SNR values as inputs and determines the so-called effective SNR. The algorithm translates the measured SNR values using an appropriate convex metric, and subsequently combines the resulting values, thereby factoring in the effects of fading, multi-path, and other signal degradations. In the third stage, the effective SNR is used to determine the frame error rate by using a look-up table of a single reference curve that specifies the frame error rate of the actual error control code over an additive white Gaussian noise channel. This suffices to accurately predict the performance of a wide range of mobile communication channels. This method can be applied to a variety of retransmission strategies, including hybrid automatic-repeat request (ARQ) and incremental redundancy (IR) and combinations of these two strategies.
摘要翻译：提供了一种方法来准确地预测成功地恢复通过无线链路接收的（编码）信息的帧的概率，而不必对帧进行解码。该方法由三个步骤组成，仅需要关于接收到的信号以及所使用的前向纠错码和重传方案的有限信息。首先，测量每个接收信号的信噪比（SNR），其中对于一起构成帧的多个段确定平均SNR。接下来，采用将这些SNR值作为输入并且确定所谓的有效SNR的算法。该算法使用适当的凸度量翻译所测量的SNR值，并且随后组合所得到的值，从而考虑到衰落，多路径和其他信号劣化的影响。在第三阶段中，通过使用单个参考曲线的查找表来确定帧错误率来确定有效SNR，该参考曲线通过加性高斯白噪声信道指定实际错误控制码的帧错误率。这足以准确地预测各种移动通信信道的性能。该方法可以应用于各种重传策略，包括混合自动重传请求（ARQ）和增量冗余（IR）以及这两种策略的组合。

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