公开(公告)号：US08385477B2

公开(公告)日：2013-02-26

申请号：US12645555

申请日：2009-12-23

Applicant: Andreas Cedergren ,  Anders Rosenqvist

Inventor： Andreas Cedergren ,  Anders Rosenqvist

IPC: H04L27/06 ,  H03D1/00

CPC classification number: H04L25/067

Abstract: In a wireless receiver, an estimated decision boundary for use in detecting symbol values from one group of combined received symbols is calculated based on a estimated traffic-to-pilot channel scaling ratio or an estimated decision boundary corresponding to another group of combined received symbols. By properly combining the information derived from the latter group of combined received symbols with channel estimation information for the former group, a decision boundary estimate for the former group can be obtained without the use of amplitude or power information for the latter group of symbols.

Abstract translation: 在无线接收机中，基于估计的业务导向信道缩放比率或与另一组合的接收符号对应的估计判定边界来计算用于检测来自一组组合接收符号的符号值的估计判定边界。 通过将来自后一组合的接收符号的信息与前一组的信道估计信息进行适当组合，可以获得前一组的判定边界估计，而不对后一组符号使用振幅或功率信息。

公开(公告)号：US08068532B2

公开(公告)日：2011-11-29

申请号：US11721582

申请日：2005-10-21

Applicant: Andreas Cedergren ,  Elias Jonsson

Inventor： Andreas Cedergren ,  Elias Jonsson

IPC: H04B1/00 ,  H04L7/00 ,  H04N7/173

CPC classification number: G06F7/49936 ,  G06F7/523 ,  H04B1/712 ,  H04B7/0842 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: Coded digital data symbols sent through a transmission channel of a communications network are received in a receiver. Estimates (y) represented by a first number (a+b) of bits are calculated, and modified estimates (y′) represented by a second number (c) of bits provided therefrom, the second number being lower than the first number. An amplitude value is calculated for each estimate (y), and an averaged amplitude value calculated for a number of amplitude values. A scaling factor (s) is calculated form the averaged amplitude value, and scaled estimates generated in dependence of die scaling factor. The scaling factor is used for a number of scaled estimates corresponding to the number of amplitude values for which the averaged amplitude value was calculated. Thus a better scaling factor is provided for most channel cases, which can still be calculated with the limited computational resources of a terminal for such networks.

Abstract translation: 通过通信网络的传输信道发送的编码数字数据符号在接收机中被接收。 计算由第一数字（a + b）表示的估计（y），并且由由其提供的第二数量（c）表示的修改估计（y'），第二数目低于第一数目。 对于每个估计（y）计算振幅值，并且针对振幅值的数量计算平均振幅值。 根据平均振幅值计算缩放因子，并根据缩放因子产生缩放估计。 缩放因子用于与计算平均振幅值的振幅值的数量相对应的多个缩放估计。 因此，为大多数信道情况提供了更好的缩放因子，这仍然可以用这种网络的终端的有限的计算资源来计算。

公开(公告)号：US20110150059A1

公开(公告)日：2011-06-23

申请号：US12645555

申请日：2009-12-23

Applicant: Andreas Cedergren ,  Anders Rosenqvist

Inventor： Andreas Cedergren ,  Anders Rosenqvist

IPC: H04B17/00

CPC classification number: H04L25/067

Abstract: In a wireless receiver, an estimated decision boundary for use in detecting symbol values from one group of combined received symbols is calculated based on a estimated traffic-to-pilot channel scaling ratio or an estimated decision boundary corresponding to another group of combined received symbols. By properly combining the information derived from the latter group of combined received symbols with channel estimation information for the former group, a decision boundary estimate for the former group can be obtained without the use of amplitude or power information for the latter group of symbols.

Abstract translation: 在无线接收机中，基于估计的业务导向信道缩放比率或与另一组合的接收符号对应的估计判定边界来计算用于检测来自一组组合接收符号的符号值的估计判定边界。 通过将来自后一组合的接收符号的信息与前一组的信道估计信息进行适当组合，可以获得前一组的判定边界估计，而不对后一组符号使用振幅或功率信息。

公开(公告)号：US07916773B2

公开(公告)日：2011-03-29

申请号：US11858548

申请日：2007-09-20

Applicant: Xiaohui Wang ,  Elias Jonsson ,  Andreas Cedergren

Inventor： Xiaohui Wang ,  Elias Jonsson ,  Andreas Cedergren

IPC: H04B1/00

CPC classification number: H04B1/7115 ,  H04B1/712

Abstract: 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).

Abstract translation: 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：US07551106B1

公开(公告)日：2009-06-23

申请号：US11958427

申请日：2007-12-18

Applicant: Andreas Cedergren

Inventor： Andreas Cedergren

IPC: H03M7/00

CPC classification number: H04L1/0057 ,  H04L1/0054

Abstract: A method is described for adjusting soft values in a code block prior to decoding. A count of saturated soft values in a code block is determined and one or more of the soft values in the code block are adjusted based on the count of saturated soft values. The count may be determined by incrementing the count for each positive saturated soft value and decrementing the count of each negative saturated soft value. The soft values may be adjusted by adding an offset computed based on the count to the soft values.

Abstract translation: 描述了用于在解码之前调整代码块中的软值的方法。 确定代码块中的饱和软值的计数，并且基于饱和软值的计数来调整代码块中的一个或多个软值。 可以通过递增每个正饱和软值的计数并递减每个负饱和软值的计数来确定计数。 可以通过将基于计数计算的偏移量加到软值上来调整软值。

公开(公告)号：US20080291981A1

公开(公告)日：2008-11-27

申请号：US11752014

申请日：2007-05-22

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B1/76 ,  H04B1/707

CPC classification number: H04B1/712 ,  H04B2201/70701

Abstract: 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.

Abstract translation: 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：US09060306B2

公开(公告)日：2015-06-16

申请号：US13976772

申请日：2011-01-13

Applicant: Andreas Cedergren ,  Anders Rosenqvist

Inventor： Andreas Cedergren ,  Anders Rosenqvist

IPC: H04W24/10 ,  H04L1/20 ,  H04B1/707 ,  H04B7/06 ,  H04L1/00

CPC classification number: H04W24/10 ,  H04B1/707 ,  H04B7/0632 ,  H04B17/309 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0026 ,  H04L1/20 ,  H04L5/0051

Abstract: Methods, a user equipment and a radio network node relating to estimation of a channel quality indicator, CQI, are provided. A first reference signal is carried by a downlink channel of a radio communication system. The user equipment receives from the radio network node information about scheduling of a downlink transmission to the user equipment and information about a second reference signal being different from the first reference signal. Furthermore, the user equipment receives from the radio network node the downlink transmission. The downlink transmission comprises the first reference signal and the second reference signal. Next, the user equipment estimates the CQI based on the first reference signal and the second reference signal.

Abstract translation: 提供了与信道质量指示符CQI的估计有关的用户设备和无线电网络节点的方法。 第一参考信号由无线电通信系统的下行链路信道承载。 用户设备从无线电网络节点接收关于向用户设备的下行链路传输的调度的信息和与第一参考信号不同的第二参考信号的信息。 此外，用户设备从无线电网络节点接收下行链路传输。 下行链路传输包括第一参考信号和第二参考信号。 接下来，用户设备基于第一参考信号和第二参考信号来估计CQI。

公开(公告)号：US20060103587A1

公开(公告)日：2006-05-18

申请号：US10523987

申请日：2003-07-03

Applicant: Andreas Cedergren ,  Christer Ostberg ,  Elias Jonsson ,  Jonas Linde

Inventor： Andreas Cedergren ,  Christer Ostberg ,  Elias Jonsson ,  Jonas Linde

IPC: G09G5/00

CPC classification number: H04L1/0047 ,  H04L1/20 ,  H04L25/0202

Abstract: Coded digital data symbols sent from a transmitter through a transmission channel of a communications network are received in a receiver. An estimate, represented by a first number of bits, of a sent data symbol is calculated, and a second number of bits, lower than the first number, is selected from the estimate to achieve a rounded estimate represented by the second number of bits. The rounded estimate is decoded to achieve a decoded data symbol. A target value for a block error rate of the transmission channel is received from the network; and the second number of bits is selected in dependence on the target block error rate value. Thus an optimal rounded estimate is provided in most situations, and the method can be performed with the limited computational resources of a terminal.

Abstract translation: 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被接收在接收机中。 计算由发送数据符号的第一位数表示的估计，并且从估计中选择低于第一数目的第二数目的比特，以实现由第二比特数表示的舍入估计。 舍入的估计被解码以实现解码的数据符号。 从网络接收传输信道的块错误率的目标值; 并且根据目标块错误率值选择第二位数。 因此，在大多数情况下提供了最佳舍入估计，并且该方法可以用终端的有限计算资源来执行。

公开(公告)号：US08411780B2

公开(公告)日：2013-04-02

申请号：US12391796

申请日：2009-02-24

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B7/02 ,  H04L1/02

CPC classification number: H04B7/0413

Abstract: Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level.

Abstract translation: 公开了用于处理接收的多流（MIMO）信号的方法和装置，特别是用于估计MIMO信号的每代码业务信道到导频功率比的方法和装置。 一种示例性方法包括：基于在第一传输时隙中接收的多个解扩业务信道符号中的平均符号幅度或平均符号功率电平的计算，以及相应导频符号幅度或导频符号功率电平的估计， 估计的传播信道响应以及用于生成MIMO信号的多个预编码矢量中的至少一个。 通过将平均符号幅度或平均符号功率电平除以相应的导频符号幅度或导频符号功率电平来计算用于第一传输时隙的每代码业务信道到导频功率比。

公开(公告)号：US07738535B2

公开(公告)日：2010-06-15

申请号：US11752014

申请日：2007-05-22

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B1/00

CPC classification number: H04B1/712 ,  H04B2201/70701

Abstract: 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.

Abstract translation: 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。