公开(公告)号：US07916773B2

公开(公告)日：2011-03-29

申请号：US11858548

申请日：2007-09-20

申请人： Xiaohui Wang ,  Elias Jonsson ,  Andreas Cedergren

发明人： Xiaohui Wang ,  Elias Jonsson ,  Andreas Cedergren

IPC分类号： H04B1/00

CPC分类号： H04B1/7115 ,  H04B1/712

摘要： A method and a receiver for receiving coded digital data symbols sent from a transmitter through a transmission channel of a communications network is adapted to calculate first symbol estimates (y) of sent data symbols from the received data symbols, each of the first symbol estimates (y) having a first bitwidth (a+b), provide a scaling factor (s) and using the scaling factor (s) to scale the first symbol estimates, truncate the scaled symbol estimates (ysc) to a second, lower bitwidth (c) and thereby providing second symbol estimates (yt).

摘要翻译： 一种用于接收通过通信网络的传输信道从发射机发送的编码数字数据符号的方法和接收机，适于从所接收的数据符号中计算所发送的数据符号的第一符号估计（y），每个第一符号估计（ 具有第一位宽（a + b））提供缩放因子并使用缩放因子来缩放第一符号估计，将缩放的符号估计（ysc）截断为第二，较低位宽（c ），从而提供第二符号估计（yt）。

公开(公告)号：US20100260237A1

公开(公告)日：2010-10-14

申请号：US12423480

申请日：2009-04-14

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04J13/04 ,  H04B1/707

CPC分类号： H04B1/712 ,  H04B2201/709727

摘要： According to the teachings disclosed in this document, a receiver estimates impairment correlations for a received signal using received pilot values. This direct estimation of impairment correlations based on direct pilot observations, provides for a rich capture of all impairment sources bearing on the received signal. Advantageously, however, estimation noise is reduced by generating a structured covariance matrix from the measured covariance matrix, and carrying out structured filtering within the structured covariance matrix. Structured filtering involves averaging matrix elements that correspond to the same processing delay difference as used for measured impairment correlation estimation. In one or more embodiments, averaged net channel estimates are used to obtain a rank one matrix, which is used to convert a measured covariance matrix to a structured covariance matrix, for carrying out structured filtering.

摘要翻译： 根据本文件中公开的教导，接收机使用接收到的导频值来估计接收信号的损害相关性。 这种基于直接导频观测的损伤相关性的直接估计提供了对接收信号的所有损伤来源的丰富捕获。 然而，有利的是，通过从所测量的协方差矩阵生成结构化协方差矩阵，并在结构化协方差矩阵内进行结构化滤波来减小估计噪声。 结构化滤波涉及平均矩阵元素，其对应于用于测量的损害相关估计的相同的处理延迟差。 在一个或多个实施例中，使用平均净信道估计来获得秩一矩阵，其用于将测量的协方差矩阵转换为结构化协方差矩阵，以执行结构化过滤。

公开(公告)号：US07715464B2

公开(公告)日：2010-05-11

申请号：US10595115

申请日：2004-07-10

申请人： Elias Jonsson ,  Roger Persson

发明人： Elias Jonsson ,  Roger Persson

IPC分类号： H04B1/00

CPC分类号： H04B1/70754 ,  H04B1/70735 ,  H04B1/7113 ,  H04B1/7117 ,  H04B2201/70702

摘要： Multipath components of signals transmitted through time-varying digital radio channels are received with individual delays, and signals through a given channel comprise a code identifying that channel. A delay profile indicating a magnitude (Y) for delay values in a search window is calculated repetitively for known channels; the delays of multipath components for known channels estimated; a signal strength indicator calculated; and a search for new multipath components not already estimated performed at regular time intervals. When a new multipath component is found, its identification code is compared to the codes of the known channels. If the code of the new component is identical to the code of a known channel, a delay profile and a signal strength indicator is calculated for a window transposed to include the new multipath component. In this way as many multipath components as possible are included in the search window for a new cell.

摘要翻译： 通过时变数字无线电信道发送的信号的多径分量被接收具有单独的延迟，并且通过给定信道的信号包括识别该信道的码。 对已知通道重复地计算指示搜索窗口中的延迟值的幅度（Y）的延迟分布; 估计已知信道的多路径分量的延迟; 计算信号强度指标; 并搜索未定时执行的新的多径分量。 当找到新的多径分量时，将其识别码与已知信道的码进行比较。 如果新组件的代码与已知通道的代码相同，则为转置以包括新的多路径分量的窗口计算延迟分布和信号强度指示符。 以这种方式，尽可能多的多径分量被包括在新单元的搜索窗口中。

公开(公告)号：US20080291981A1

公开(公告)日：2008-11-27

申请号：US11752014

申请日：2007-05-22

申请人： Elias Jonsson ,  Andreas Cedergren

发明人： Elias Jonsson ,  Andreas Cedergren

IPC分类号： H04B1/76 ,  H04B1/707

CPC分类号： H04B1/712 ,  H04B2201/70701

摘要： A receiver utilizes pilot channel propagation channel estimates and a signal-to-interference metric derived from the pilot channel to form combining weights for use in obtaining soft symbols from a desired channel for subsequent decoding. The soft symbols thus obtained are substantially independent of the pilot channel amplitude.

摘要翻译： 接收机利用导频信道传播信道估计和从导频信道导出的信号到干扰度量来形成用于从期望信道获得软符号以用于后续解码的组合权重。 如此获得的软符号基本上与导频信道幅度无关。

公开(公告)号：US20080205562A1

公开(公告)日：2008-08-28

申请号：US11679541

申请日：2007-02-27

申请人： Elias Jonsson ,  Andres Reial

发明人： Elias Jonsson ,  Andres Reial

IPC分类号： H04B7/10

CPC分类号： H04W72/12 ,  H04B1/7103 ,  H04B1/712 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0697 ,  H04B2201/70701 ,  H04B2201/709727 ,  Y02D70/40 ,  Y02D70/444

摘要： The teachings herein disclose methods and apparatus that simplify impairment correlation estimation for received signal processing, based on determining, for any given processing interval, which impairment contributors should be considered in the estimation of overall received signal impairment correlations. These simplifications reduce computational processing requirements, allowing reduced circuit complexity and/or reduced operating power, and improve receiver performance. A corresponding transmitter and transmission method include transmitting multiple information streams to targeted receivers according to ongoing scheduling, and controlling the ongoing scheduling to reduce the number of impairment contributors considered in impairment correlation estimation at the targeted receivers. In one embodiment, a receiver identifies which impairment contributors to consider based on receiving control information. In another embodiment, the receiver identifies the impairment contributors to consider based on background processing, e.g., background determination of parametric model fitting parameters for a plurality of impairment contributors, and observing those model fitting parameters over time.

摘要翻译： 本文的教导公开了简化对接收信号处理的损害相关估计的方法和装置，其基于对于任何给定的处理间隔，在估计总体接收信号损害相关中应考虑哪些损害贡献者。 这些简化减少了计算处理要求，从而降低了电路复杂度和/或降低了操作功率，并提高了接收机性能。 相应的发射机和传输方法包括根据正在进行的调度向目标接收机发送多个信息流，并控制正在进行的调度，以减少目标接收机的损害相关估计中所考虑的损害贡献者的数量。 在一个实施例中，接收机基于接收控制信息识别要考虑的损害贡献者。 在另一个实施例中，接收机基于背景处理识别要考虑的损害贡献者，例如用于多个损害贡献者的参数模型拟合参数的背景确定，以及随时间观察这些模型拟合参数。

公开(公告)号：US20050143112A1

公开(公告)日：2005-06-30

申请号：US10499071

申请日：2002-12-18

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04B7/005 ,  H04B7/00

CPC分类号： H04W52/125 ,  H04W52/54

摘要： A power control unit (500) for a power control system in a mobile communication system, the power control unit (500) comprising an inner power control loop element (503, 507), which generates a transmit power control command (504), and an outer power control loop element (516) connected to the inner power control loop element (503, 507), the outer power control loop element (516) being configured for providing a target value (506) to the inner power control loop element (503, 507). The outer power control loop element (516) comprises a soft information estimator (509) connected to at least one outer loop regulator (501, 502), wherein the soft information estimator (509) is configured to provide a soft information estimate (510) to the at least one outer loop regulator (503).

摘要翻译： 一种用于移动通信系统中的功率控制系统的功率控制单元（500），所述功率控制单元（500）包括产生发射功率控制命令（504）的内部功率控制环路元件（503,507），以及 外部功率控制回路元件（516），其被配置为向所述内部功率控制回路元件（503,507）提供目标值（506） 503，507）。 外部功率控制环路元件（516）包括连接到至少一个外部环路调节器（501,502）的软信息估计器（509），其中软信息估计器（509）被配置为提供软信息估计（510） 至少一个外环调节器（503）。

公开(公告)号：US08761317B2

公开(公告)日：2014-06-24

申请号：US13439357

申请日：2012-04-04

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04L27/06

CPC分类号： H03M13/6337 ,  H03M13/2957 ,  H04L25/021 ,  H04L25/0212 ,  H04L25/0238 ,  H04L25/067

摘要： Log-likelihood ratios produced by a decoder are incorporated into a soft symbol to soft bit estimation process and are used to perform improved channel estimation and impairment covariance estimation. In an example method, a plurality of soft bits and corresponding probability metrics for a series of received unknown symbols are generated. Estimates of the received unknown information symbols are then regenerated, as a function of the soft bits and corresponding probability metrics. An estimate of the average amplitude of the received unknown information symbols, or an estimate of the propagation channel response experienced by the received unknown information symbols, or both, are calculated, as a function of the regenerated symbol estimates. The results are applied to produce demodulated symbols for a second decoding iteration for the series of received unknown symbols.

摘要翻译： 由解码器产生的对数似然比被并入到软符号到软比特估计过程中，并且用于执行改进的信道估计和损害协方差估计。 在示例性方法中，生成多个软比特和一系列接收到的未知符号的相应概率度量。 接收到的未知信息符号的估计随后根据软比特和相应的概率度量被重新生成。 作为再生的符号估计的函数，计算接收到的未知信息符号的平均幅度的估计，或由接收到的未知信息符号经历的传播信道响应的估计或两者。 结果被应用于产生用于所接收的未知符号序列的第二解码迭代的解调符号。

公开(公告)号：US20130266095A1

公开(公告)日：2013-10-10

申请号：US13439357

申请日：2012-04-04

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04L27/06

CPC分类号： H03M13/6337 ,  H03M13/2957 ,  H04L25/021 ,  H04L25/0212 ,  H04L25/0238 ,  H04L25/067

摘要： Log-likelihood ratios produced by a decoder are incorporated into a soft symbol to soft bit estimation process and are used to perform improved channel estimation and impairment covariance estimation. In an example method, a plurality of soft bits and corresponding probability metrics for a series of received unknown symbols are generated. Estimates of the received unknown information symbols are then regenerated, as a function of the soft bits and corresponding probability metrics. An estimate of the average amplitude of the received unknown information symbols, or an estimate of the propagation channel response experienced by the received unknown information symbols, or both, are calculated, as a function of the regenerated symbol estimates. The results are applied to produce demodulated symbols for a second decoding iteration for the series of received unknown symbols.

摘要翻译： 由解码器产生的对数似然比被并入到软符号到软比特估计过程中，并且用于执行改进的信道估计和损害协方差估计。 在示例性方法中，生成多个软比特和一系列接收到的未知符号的相应概率度量。 接收到的未知信息符号的估计随后根据软比特和相应的概率度量被重新生成。 作为再生的符号估计的函数，计算接收到的未知信息符号的平均幅度的估计，或由接收到的未知信息符号经历的传播信道响应的估计或两者。 结果被应用于产生用于所接收的未知符号序列的第二解码迭代的解调符号。

公开(公告)号：US20130107694A1

公开(公告)日：2013-05-02

申请号：US13703410

申请日：2010-07-14

申请人： Yang Hu ,  Elias Jonsson

发明人： Yang Hu ,  Elias Jonsson

IPC分类号： H04W24/02

CPC分类号： H04W24/02 ,  H04J13/0003 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0016 ,  H04L5/0051 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0232 ,  H04L27/2613 ,  H04L27/262 ,  H04W48/08 ,  H04W72/042

摘要： When more than two layers are multiplexed in one CDM group, length-4 OCC has to be used across both clusters in one subframe. This means that slot-by-slot channel estimation according to conventional schemes cannot be exploited and Doppler impact cannot be well overcome. By introducing virtual variables and virtual channel samples that are used in processing two time slots in a subframe independently and applying a frequency domain filter based on the virtual variables and then performing postprocessing based on virtual channel samples, slot-by-slot processing is possible to reduce latency and overcome Doppler impact. Code de-spreading of length-4 OCC is no longer processed in time domain, but in frequency domain with two adjacent CDM subgroups. As a result, the frequency domain filtering can start earlier whereby detection latency and processing time for OCC of length longer than 2 is reduced. It can also be used for the length-2 OCC.

摘要翻译： 当一个CDM组中多于两层复用时，必须在一个子帧中跨两个簇使用长度为4的OCC。 这意味着根据常规方案的逐时隙信道估计不能被利用，并且多普勒影响不能很好地克服。 通过引入用于独立处理子帧中的两个时隙的虚拟变量和虚拟信道样本，并且基于虚拟变量应用频域过滤器，然后基于虚拟信道样本执行后处理，逐个时隙处理是可能的 减少延迟并克服多普勒影响。 长度为4的OCC的码扩展不再在时域中进行处理，而是在频域中具有两个相邻的CDM子组。 结果，可以更早地开始频域滤波，从而降低长度大于2的OCC的检测等待时间和处理时间。 它也可以用于长度为2的OCC。

公开(公告)号：US08218606B2

公开(公告)日：2012-07-10

申请号：US12423480

申请日：2009-04-14

申请人： Elias Jonsson

发明人： Elias Jonsson

IPC分类号： H04B1/69

CPC分类号： H04B1/712 ,  H04B2201/709727

摘要： According to the teachings disclosed in this document, a receiver estimates impairment correlations for a received signal using received pilot values. This direct estimation of impairment correlations based on direct pilot observations, provides for a rich capture of all impairment sources bearing on the received signal. Advantageously, however, estimation noise is reduced by generating a structured covariance matrix from the measured covariance matrix, and carrying out structured filtering within the structured covariance matrix. Structured filtering involves averaging matrix elements that correspond to the same processing delay difference as used for measured impairment correlation estimation. In one or more embodiments, averaged net channel estimates are used to obtain a rank one matrix, which is used to convert a measured covariance matrix to a structured covariance matrix, for carrying out structured filtering.

摘要翻译： 根据本文件中公开的教导，接收机使用接收到的导频值来估计接收信号的损害相关性。 这种基于直接导频观测的损伤相关性的直接估计提供了对接收信号的所有损伤来源的丰富捕获。 然而，有利的是，通过从所测量的协方差矩阵生成结构化协方差矩阵，并在结构化协方差矩阵内进行结构化滤波来减小估计噪声。 结构化滤波涉及平均矩阵元素，其对应于用于测量的损害相关估计的相同的处理延迟差。 在一个或多个实施例中，使用平均净信道估计来获得秩一矩阵，其用于将测量的协方差矩阵转换为结构化协方差矩阵，以执行结构化过滤。