公开(公告)号：US20140341174A1

公开(公告)日：2014-11-20

申请号：US13893475

申请日：2013-05-14

Applicant: ST-ERICSSON SA

Inventor： Elias Jonsson

IPC: H04L5/00

CPC classification number: H04L5/0007 ,  H04B17/327 ,  H04L5/0048

Abstract: A Reference Signal Received Power (RSRP) value is produced from a received Orthogonal Frequency Division Multiplexed (OFDM) signal that comprises a plurality of reference symbols located at known sub-carrier frequencies and times within the received OFDM signal. RSRP value production involves, for each hypothesized error state selected from a plurality of different hypothesized error states, ascertaining a corresponding hypothesized RSRP value, and then using the hypothesized RSRP values as a basis for determining a value for use as the produced RSRP value (e.g., by selecting a maximum one of the hypothesized RSRP values as the produced RSRP value). In this technology, each of the hypothesized error states is a hypothesized frequency error paired with a hypothesized timing error and the corresponding hypothesized RSRP value is produced by adjusting one or more measured channel estimates as a function of the hypothesized error state.

Abstract translation: 从接收到的正交频分复用（OFDM）信号产生参考信号接收功率（RSRP）值，所述正交频分复用（OFDM）信号包括位于接收的OFDM信号中的已知子载波频率和时间的多个参考符号。 对于从多个不同的假设错误状态中选出的每个假设错误状态，确定相应的假设的RSRP值，然后使用假定的RSRP值作为确定用作所产生的RSRP值的值的基础（例如， 通过选择假设的RSRP值中的最大值作为产生的RSRP值）。 在该技术中，每个假设的误差状态是与假设的定时误差配对的假设频率误差，并且通过将一个或多个测量的信道估计值调整为假设的误差状态的函数来产生相应的假设的RSRP值。

公开(公告)号：US09124388B2

公开(公告)日：2015-09-01

申请号：US13893475

申请日：2013-05-14

Applicant: ST-Ericsson SA

Inventor： Elias Jonsson

IPC: H04L5/00

CPC classification number: H04L5/0007 ,  H04B17/327 ,  H04L5/0048

Abstract: A Reference Signal Received Power (RSRP) value is produced from a received Orthogonal Frequency Division Multiplexed (OFDM) signal that comprises a plurality of reference symbols located at known sub-carrier frequencies and times within the received OFDM signal. RSRP value production involves, for each hypothesized error state selected from a plurality of different hypothesized error states, ascertaining a corresponding hypothesized RSRP value, and then using the hypothesized RSRP values as a basis for determining a value for use as the produced RSRP value (e.g., by selecting a maximum one of the hypothesized RSRP values as the produced RSRP value). In this technology, each of the hypothesized error states is a hypothesized frequency error paired with a hypothesized timing error and the corresponding hypothesized RSRP value is produced by adjusting one or more measured channel estimates as a function of the hypothesized error state.

Abstract translation: 从接收到的正交频分复用（OFDM）信号产生参考信号接收功率（RSRP）值，所述正交频分复用（OFDM）信号包括位于接收的OFDM信号中的已知子载波频率和时间的多个参考符号。 对于从多个不同的假设错误状态中选出的每个假设错误状态，确定相应的假设的RSRP值，然后使用假定的RSRP值作为确定用作所产生的RSRP值的值的基础（例如， 通过选择假设的RSRP值中的最大值作为产生的RSRP值）。 在该技术中，每个假设的误差状态是与假设的定时误差配对的假设频率误差，并且通过将一个或多个测量的信道估计值调整为假设的误差状态的函数来产生相应的假设的RSRP值。

公开(公告)号：US08976840B2

公开(公告)日：2015-03-10

申请号：US14291049

申请日：2014-05-30

Applicant: ST-Ericsson SA

Inventor： Kazuyoshi Uesaka ,  Elias Jonsson ,  Hisashi Onozawa

IPC: H04B1/00 ,  H04B1/7117

CPC classification number: H04B1/7117 ,  H04B1/7113

Abstract: The method disclosed herein is implemented in a radio receiver to detect an AWGN channel, where the radio receiver comprises a rake receiver. The radio receiver receives signals transmitted via a propagation channel from a transmitter, and determines that the propagation channel is an AWGN channel when a filtered version of a minimum value of a metric is lower than a threshold value. The metric relates to a difference between a normalized measured power profile of the propagation channel and a normalized power template, which normalized power template is dependent on predetermined sampling timing shifts and on rake finger positions within the rake receiver.

Abstract translation: 本文公开的方法在无线电接收机中实现以检测AWGN信道，其中无线电接收机包括耙式接收机。 无线电接收机接收从发射机经由传播信道传输的信号，并且当度量的最小值的滤波版本低于阈值时，确定传播信道是AWGN信道。 该度量涉及传播信道的归一化测量功率分布与归一化功率模板之间的差异，该归一化功率模板取决于预定采样定时偏移和耙机接收机内的耙指位置。

公开(公告)号：US20140355654A1

公开(公告)日：2014-12-04

申请号：US14291049

申请日：2014-05-30

Applicant: ST-Ericsson SA

Inventor： Kazuyoshi Uesaka ,  Elias Jonsson ,  Hisashi Onozawa

IPC: H04B1/7117

CPC classification number: H04B1/7117 ,  H04B1/7113

Abstract: The method disclosed herein is implemented in a radio receiver to detect an AWGN channel, where the radio receiver comprises a rake receiver. The radio receiver receives signals transmitted via a propagation channel from a transmitter, and determines that the propagation channel is an AWGN channel when a filtered version of a minimum value of a metric is lower than a threshold value. The metric relates to a difference between a normalized measured power profile of the propagation channel and a normalized power template, which normalized power template is dependent on predetermined sampling timing shifts and on rake finger positions within the rake receiver.

Abstract translation: 本文公开的方法在无线电接收机中实现以检测AWGN信道，其中无线电接收机包括耙式接收机。 无线电接收机接收从发射机经由传播信道传输的信号，并且当度量的最小值的滤波版本低于阈值时，确定传播信道是AWGN信道。 该度量涉及传播信道的归一化测量功率分布与归一化功率模板之间的差异，该归一化功率模板取决于预定采样定时偏移和耙机接收机内的耙指位置。