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公开(公告)号：WO2008061323A1
公开(公告)日：2008-05-29
申请号：PCT/AU2007/001812
申请日：2007-11-23
Applicant: UNIVERSITY OF SOUTH AUSTRALIA , GRANT, Alexander, James , BECK, Andrew
Inventor： GRANT, Alexander, James , BECK, Andrew
CPC classification number: H04L25/03171 , H04L25/03286 , H04L25/067 , H04L2025/03426
Abstract: A method for estimation of APP symbol probabilities in a Soft-input, soft-output (SISO) detector through the use of a depth first tree search to perform the list sphere detection step is disclosed. The method includes a depth first tree search for symbol vectors with a path metric value less than a predetermined search threshold, where the tree comprises a root node and one level for each of the sources, and each node having a branch for each of the possible symbols in the symbol set for the source at a subsequent level of the tree. The method includes estimation of the APP value of at least one of the symbols during the search of the tree which can remove the need for storing a list of candidate symbols. This method has application in iteratively decoded systems and for Multiple-Input, Multiple Output (MIMO) receivers. A best first enumeration method is also described for identifying and enumerating a set of valid child nodes during the depth first tree search, as well as a new list-sphere detector that finds all terms have metrics less than (lambda plus epsilon).
Abstract translation: 公开了一种通过使用深度第一树搜索来执行列表球检测步骤来估计软输入软输出（SISO）检测器中的APP符号概率的方法。 该方法包括对具有小于预定搜索阈值的路径度量值的符号向量的深度第一树搜索，其中树包括每个源的根节点和一个级别，并且每个节点具有用于每个可能的每个节点的分支 在树的后续级别为源设置的符号中的符号。 该方法包括在树的搜索期间估计至少一个符号的APP值，其可以消除对存储候选符号的列表的需要。 该方法在迭代解码系统和多输入多输出（MIMO）接收机中都有应用。 还描述了一种最佳的第一枚举方法，用于在深度第一树搜索期间识别和枚举一组有效的子节点，以及一个新的列表球体检测器，其查找所有项具有小于（lambda +ε）的度量。
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公开(公告)号：WO2008046163A1
公开(公告)日：2008-04-24
申请号：PCT/AU2007/001604
申请日：2007-10-22
Applicant: UNIVERSITY OF SOUTH AUSTRALIA , GRANT, Alexander, James , SHAKEEL, Ismail
Inventor： GRANT, Alexander, James , SHAKEEL, Ismail
CPC classification number: H04L27/2617
Abstract: Disclosed is a method, apparatus and system for reducing peak-to-average-power ratio (PAPR) of an error encoded signal. The method involves introducing at least one error in the error coded signal such that the PAPR of the error coded signal with the introduced error is less than the PAPR of the error coded signal.
Abstract translation: 公开了一种用于降低误差编码信号的峰均功率比（PAPR）的方法，装置和系统。 该方法涉及在错误编码信号中引入至少一个误差，使得具有引入误差的误差编码信号的PAPR小于误差编码信号的PAPR。
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公开(公告)号：WO2007095697A1
公开(公告)日：2007-08-30
申请号：PCT/AU2007/000231
申请日：2007-02-27
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , GRANT, Alexander, James , HALEY, David, Victor, Lawrie
CPC classification number: H04L25/022 , H04B1/10 , H04B1/16 , H04L25/0224 , H04L25/03159 , H04L27/2647
Abstract: Methods and apparatus are described for processing data in a wireless communication network. Iterative estimation techniques are used to enable tracking of time-varying communication channels. A signal is transmitted over a channel in the network, the signal comprising a sequence of symbols carried on a plurality of sub-carriers. Boot-up estimator (304) estimates, in a time domain, parameters of a model of the channel based on the received signal. A domain converter (206) transforms at least one of the estimated parameters from the time domain to provide at least one transformed parameter in a second domain. An equalizer (210) and decoder (212) determine estimates of symbols from the received signal using the at least one transformed parameter, and tracking estimator (314) updates the estimated model parameters during reception of the signal using at least one estimated symbol.
Abstract translation: 描述了用于在无线通信网络中处理数据的方法和装置。 使用迭代估计技术来跟踪时变通信信道。 信号通过网络中的信道发送，该信号包括在多个子载波上承载的码元序列。 启动估计器（304）在时域中估计基于接收信号的信道模型的参数。 域转换器（206）从时域转换估计参数中的至少一个以在第二域中提供至少一个变换参数。 均衡器（210）和解码器（212）使用至少一个变换参数确定来自接收信号的符号的估计，并且跟踪估计器（314）使用至少一个估计符号在接收信号期间更新估计的模型参数。
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公开(公告)号：WO2011160190A1
公开(公告)日：2011-12-29
申请号：PCT/AU2011/000782
申请日：2011-06-24
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , LETZEPIS, Nick , GRANT, Alexander, James , HALEY, David, Victor, Lawrie
Inventor： ALEXANDER, Paul, Dean , LETZEPIS, Nick , GRANT, Alexander, James , HALEY, David, Victor, Lawrie
CPC classification number: H04B1/1081 , H04J11/0063 , H04L25/0204 , H04L25/022 , H04L25/0222 , H04L25/0242 , H04L27/06 , H04L27/2649 , H04L27/2657 , H04L27/2671 , H04L27/2695
Abstract: Described herein is a method and system for estimating a time-varying multipath communication channel (102). The system comprises a receiver (104) for receiving a signal comprising a data packet transmitted over the multipath communication channel (102). The system also comprises a frequency-domain channel estimator (110) that generates a frequency-domain channel estimate (112) based on the received signal. The system further comprises a time-domain channel modeller (114) that receives the frequency-domain channel estimate (112) and generates an estimate of parameters in a time-domain model of the multipath communication channel (102). The model characterises the multipath communication channel (102) as a delay line with a plurality of taps, each tap having tap parameters defining a delay, a Doppler and a gain for the tap. The tap parameters are constant over the data packet.
Abstract translation: 这里描述了一种用于估计时变多路径通信信道（102）的方法和系统。 该系统包括用于接收包括通过多路径通信信道（102）发送的数据分组的信号的接收机（104）。 该系统还包括频域信道估计器（110），其根据接收到的信号产生频域信道估计（112）。 系统还包括时域信道建模器（114），其接收频域信道估计（112）并且生成多径通信信道（102）的时域模型中的参数估计。 该模型将多径通信信道（102）表征为具有多个抽头的延迟线，每个抽头具有限定延迟的抽头参数，抽头的多普勒和增益。 抽头参数在数据包上是恒定的。
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公开(公告)号：WO2008040088A1
公开(公告)日：2008-04-10
申请号：PCT/AU2007/001506
申请日：2007-10-05
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , GRAY, Paul, Kingsley , HALEY, David, Victor, Lawrie , BUETEFUER, John, Lawrence , GRANT, Alexander, James , PHAM, Phuc, Ngoc , SUTTON, Joshua, Charles , SUTER, Martin
Inventor： ALEXANDER, Paul, Dean , GRAY, Paul, Kingsley , HALEY, David, Victor, Lawrie , BUETEFUER, John, Lawrence , GRANT, Alexander, James , PHAM, Phuc, Ngoc , SUTTON, Joshua, Charles , SUTER, Martin
CPC classification number: H04L25/0202 , H04L1/0045 , H04L1/0047 , H04L1/0048 , H04L1/0054 , H04L1/0059 , H04L25/0204 , H04L25/022 , H04L25/0224 , H04L25/03318 , H04L27/2647
Abstract: Methods and apparatus are described for improving receiver performance in a multicarrier communication network in which an encoded symbol (250) is transmitted over a transmission channel (20) in the communications system. A model of the transmission channel (20) is estimated (718, 760), said model characterising an effect of intercarrier interference on at least one carrier in the multicarrier system. The received symbol (250) is decoded (720, 762) using the estimated model to remove a predicted effect of intercarrier interference. A pre-processor (40) is also described for operation in conjunction with a communications receiver (30) in the network. The pre-processor (40) includes a channel estimator (42) operable to estimate at least one feature of the communication channel based on a received signal. The pre-processor (40) modifies the received signal dependent on the at least one estimated feature and provides the modified signal to the communications receiver (30).
Abstract translation: 描述了用于改善在通信系统中通过传输信道（20）发送编码符号（250）的多载波通信网络中的接收机性能的方法和装置。 估计传输信道（20）的模型（718,760），所述模型表征多载波系统中至少一个载波的载波间干扰的影响。 使用估计的模型对接收到的符号（250）进行解码（720,762），以消除载波间干扰的预测影响。 还描述了用于与网络中的通信接收器（30）一起操作的预处理器（40）。 预处理器（40）包括信道估计器（42），其可操作以基于所接收的信号来估计通信信道的至少一个特征。 预处理器（40）根据至少一个估计特征修改接收信号，并将修改的信号提供给通信接收机（30）。
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Patent Agency Ranking
公开(公告)号：WO2007134406A1
公开(公告)日：2007-11-29
申请号：PCT/AU2007/000722
申请日：2007-05-24
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , GRANT, Alexander, James , HALEY, David, Victor, Lawrie
CPC classification number: H04L1/0047 , H04L25/0212 , H04L25/022 , H04L27/2647
Abstract: A data processing device (100, 300) is described forming part of a receiver for a multicarrier communications system. The data processing device is configured to process at least one observed symbol to generate an information bit estimate for the symbol, and includes a channel prediction stage configured to receive an observed symbol and at least one feedback signal representing an estimate of a transmitted symbol and to generate a channel prediction. At least one initial processing stream (104) is configured to process the observed symbol on the basis of a channel prediction calculated at a respective time by the channel prediction stage and to output a signal representing an estimate of a transmitted symbol corresponding to the observed symbol for feed back into the channel prediction stage. A subsequent processing stream (102) is configured to process the observed symbol on the basis of a channel prediction calculated at a second time by the channel prediction stage at least partly on the basis of an output of at least one initial processing stream in respect of the observed symbol, to generate an information bit estimate corresponding to the observed symbol.
Abstract translation: 描述了形成用于多载波通信系统的接收机的一部分的数据处理设备（100,300）。 所述数据处理装置被配置为处理至少一个观察到的符号以产生所述符号的信息比特估计，并且包括被配置为接收观察符号的信道预测级和表示所发送符号的估计的至少一个反馈信号，并且 生成通道预测。 至少一个初始处理流（104）被配置为基于在各个时间由信道预测级计算的信道预测来处理观察到的符号，并且输出表示对应于观察到的符号的发送符号的估计的信号 用于反馈到信道预测阶段。 后续处理流（102）被配置为至少部分地基于至少一个初始处理流的输出来基于由信道预测阶段在第二时间计算的信道预测来处理所观察到的符号 观察到的符号，以产生对应于所观察到的符号的信息比特估计。
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公开(公告)号：WO2007022564A1
公开(公告)日：2007-03-01
申请号：PCT/AU2006/001201
申请日：2006-08-22
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , BUETEFUER, John, Lawrence , CURTIS, Ivan, Anthony , FARRELL, Wade, Nicholas , GRANT, Alexander, James , HALEY, David, Victor, Lawrie , JAKAS, Stephen, Peter , SUTTON, Joshua, Charles
Inventor： ALEXANDER, Paul, Dean , BUETEFUER, John, Lawrence , CURTIS, Ivan, Anthony , FARRELL, Wade, Nicholas , GRANT, Alexander, James , HALEY, David, Victor, Lawrie , JAKAS, Stephen, Peter , SUTTON, Joshua, Charles
CPC classification number: H04L27/2657 , H04L1/0618 , H04L25/0204 , H04L27/2662 , H04L27/2695
Abstract: The present application discloses a number of inventions directed to method(s), apparatus and/or networks and systems adapted to track time varying channels, adapted to synchronise packets arriving at a receiver, adapted to correlate a received signal, adapted to manage digital resources, adapted to receive a signal and/or adapted to enable communication in a wireless packet based communications network.
Abstract translation: 本申请公开了针对适于跟踪时变信道的方法，装置和/或网络和系统的许多发明，其适于同步到达接收机的分组，其适于使接收信号相关联，适于管理数字资源 ，适于接收信号和/或适于在基于无线分组的通信网络中实现通信。
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公开(公告)号：WO2010144973A1
公开(公告)日：2010-12-23
申请号：PCT/AU2010/000768
申请日：2010-06-18
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , HALEY, David, Victor, Lawrie , GRANT, Alexander, James
CPC classification number: G01S13/003 , G01S13/931 , G01S2013/9339 , G01S2013/9353
Abstract: A method and system are described for estimating an environment surrounding a wireless communication system, the environment including at least one inflector that inflects transmitted signals. An observation generator (300) receives an input signal transmitted from a transmitter to a receiver via a wireless communication channel and also receives system state information pertaining to at least one of the receiver, the transmitter and the inflector. An observation processor (302) uses observations (303) from the observation generator (300) to estimate at least one property of the inflector based on the received input signal and the system state information.
Abstract translation: 描述了一种用于估计无线通信系统周围环境的方法和系统，该环境包括折射发射信号的至少一个偏转器。 观察发生器（300）经由无线通信信道接收从发射机发送到接收机的输入信号，并且还接收与接收机，发射机和反射器中的至少一个有关的系统状态信息。 观察处理器（302）使用来自观察发生器（300）的观测值（303），以基于所接收的输入信号和系统状态信息来估计变幅器的至少一个特性。
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公开(公告)号：WO2005011128A1
公开(公告)日：2005-02-03
申请号：PCT/AU2004/001036
申请日：2004-07-23
Applicant: COHDA WIRELESS PTY LTD , ALEXANDER, Paul, Dean , GRANT, Alexander, James , RASMUSSEN, Lars, Kildehoj , JAKAS, Stephen, Peter
Inventor： ALEXANDER, Paul, Dean , GRANT, Alexander, James , RASMUSSEN, Lars, Kildehoj , JAKAS, Stephen, Peter
IPC: H03M13/00
CPC classification number: H04L25/0202 , H04L25/0204 , H04L25/03171 , H04L27/2657 , H04L27/2662 , H04L27/2675
Abstract: The present invention provides an iterative decoding circuit for a wireless multiuser communications receiver comprising a first signal processing means for receiving at least one received signal, said first signal processing means comprising at least two linear iterative filters such that the first linear iterative filter provides an estimate of a selected received signal to an estimated signal output and a second linear iterative filter provides estimates of at least one other received signal, delayed by one iteration cycle, to an input of said first linear iterative filter, a second signal processing means for receiving the estimated signal output of the first linear iterative filter and providing a further received signal estimate to the input of the first signal processing means in a succeeding iteration cycle of the decoding circuit. The application also includes a method of communication with packet sample hypothesis and a method of communicating using estimating time varying channel impairments.
Abstract translation: 本发明提供了一种用于无线多用户通信接收机的迭代解码电路，其包括用于接收至少一个接收信号的第一信号处理装置，所述第一信号处理装置包括至少两个线性迭代滤波器，使得第一线性迭代滤波器提供估计 将所选择的接收信号的估计信号输出到估计信号输出，而第二线性迭代滤波器将延迟了一个迭代周期的至少一个其它接收信号的估计提供给所述第一线性迭代滤波器的输入;第二信号处理装置， 估计第一线性迭代滤波器的信号输出，并在解码电路的后续迭代循环中向第一信号处理装置的输入提供另外的接收信号估计。 应用还包括与分组样本假设进行通信的方法和使用估计时变信道损伤进行通信的方法。
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公开(公告)号：WO2003094037A1
公开(公告)日：2003-11-13
申请号：PCT/AU2003/000502
申请日：2003-04-29
Applicant: UNIVERSITY OF SOUTH AUSTRALIA , ALEXANDER, Paul, Dean , GRANT, Alexander, James , RASMUSSEN, Lars, Kildehoj
IPC: G06F17/00
CPC classification number: H04L25/03171 , H04B1/7105
Abstract: The invention is an iterative signal processing arrangement having one or more pairs of first and second signal processing components. These pairs are in iterative configuration with each of the first signal processing components having as its input one or more received signals dependent upon one or more transmitted signals. For each said signal processing component pair the output of said first signal processing component is an estimate of a characteristic of a selected transmitted signal based on the current and one or more previous input signals received by said first signal processing component. This estimate is input to said corresponding second signal processing component which provides a further estimate of said selected transmitted signal. The outputs of all said second components of respective pairs are input to their corresponding first components in a succeeding iteration cycle.
Abstract translation: 本发明是具有一对或多对第一和第二信号处理部件的迭代信号处理装置。 这些对是迭代配置，其中每个第一信号处理组件具有取决于一个或多个发射信号的一个或多个接收信号作为其输入。 对于每个所述信号处理部件对，所述第一信号处理部件的输出是基于由所述第一信号处理部件接收的当前和一个或多个先前输入信号的所选发送信号的特性的估计。 该估计被输入到所述相应的第二信号处理组件，该组件提供对所选择的发射信号的进一步估计。 各个对的所有第二组件的输出在随后的迭代循环中被输入到它们对应的第一组件。
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