公开(公告)号：WO2012060751A1

公开(公告)日：2012-05-10

申请号：PCT/SE2010/051203

申请日：2010-11-04

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  MAURITZ, Oskar ,  PETERS, Gunnar

发明人： MAURITZ, Oskar ,  PETERS, Gunnar

IPC分类号： H04B7/01 ,  H04L25/02

CPC分类号： H04L25/0222 ,  H04B7/04 ,  H04B7/0667 ,  H04B7/10

摘要： Embodiments herein relate to a method in a radio base station (12) for estimating Doppler spread of a signal transmitted by a user equipment (10) over a channel in a radio communications network. The radio base station (12) and user equipment (10) are comprised in the radio communications network. The radio base station (12) receives a first signal and a second signal from the user equipment (10), which first signal and second signal are based on the signal transmitted by the user equipment (10). The first and second signals are separated in space, time and/or polarisation. The radio base station (12) estimates a first channel estimate of the received first signal by comparing the received first signal to a known signal, and a second channel estimate of the received second signal by comparing the received second signal to the known signal. The radio base station (12) determines a ratio of the first channel estimate to the second channel estimate, and estimates an autocorrelation function of a function of the determined ratio. The radio base station (12) then estimates the Doppler spread based on the estimated autocorrelation function.

摘要翻译： 本文的实施例涉及一种无线电基站（12）中用于估计在无线电通信网络中的信道上由用户设备（10）发送的信号的多普勒扩展的方法。 无线电基站（12）和用户设备（10）包括在无线电通信网络中。 无线电基站（12）从用户设备（10）接收第一信号和第二信号，该第一信号和第二信号基于用户设备（10）发送的信号。 第一和第二信号在空间，时间和/或极化中分离。 无线电基站（12）通过将接收到的第一信号与已知信号进行比较来估计接收到的第一信号的第一信道估计，以及通过将接收的第二信号与已知信号进行比较来接收第二信号的第二信道估计。 无线电基站（12）确定第一信道估计与第二信道估计的比率，并且估计所确定的比率的函数的自相关函数。 然后，无线电基站（12）基于估计的自相关函数来估计多普勒扩展。

公开(公告)号：WO2011075024A1

公开(公告)日：2011-06-23

申请号：PCT/SE2009/051457

申请日：2009-12-18

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  MAURITZ, Oskar ,  ÅHLANDER, Mats ,  HUSS, Fredrik

发明人： MAURITZ, Oskar ,  ÅHLANDER, Mats ,  HUSS, Fredrik

IPC分类号： H03G3/30 ,  H04L27/38

CPC分类号： H04L27/3809

摘要： A basic idea is to determine (S1) occurrence of a glitch caused by operation of the AGC mechanism, identify (S2) those modulation symbols in a digitized version of the received signal that are affected by the glitch, each modulation symbol represented by a number of bits in combination, and then reduce (S3), for each of the identified modulation symbols, the contribution in representing the identified modulation symbol as provided by at least a subset of the bits of the modulation symbol. In this way, the adverse effects of the glitch can be effectively mitigated and subsequent detection of the desired signal can be significantly improved. This also means that the link performance will be significantly improved.

摘要翻译： 一个基本思想是确定（S1）由AGC机构的操作引起的毛刺的发生，识别（S2）受毛刺影响的接收信号的数字化版本中的那些调制符号，每个调制符号由数字 的比特，然后对于每个所识别的调制符号，减少（S3）表示由调制符号的比特的至少一个子集提供的所识别的调制符号的贡献。 以这种方式，可以有效地减轻毛刺的不利影响，并且可以显着地提高所需信号的随后检测。 这也意味着链路性能将显着提高。

公开(公告)号：WO2022191749A1

公开(公告)日：2022-09-15

申请号：PCT/SE2021/050221

申请日：2021-03-12

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： HURD, Magnus ,  MAURITZ, Oskar

IPC分类号： H04W74/08 ,  H04L5/00 ,  H04W56/00 ,  H04W74/00 ,  H04W24/00 ,  H04W52/34 ,  H04W72/04

摘要： A method (300) for determining cells in which a preamble has been transmitted. The method includes obtaining (s302) N sample sets, wherein each one of the N sample sets comprises a set of M samples and each one of the N sample sets is associated with a different cell included in a set of N cells. The method also includes adding (s304) the N sample sets to create a first combined set of samples comprising M samples. The method also includes forming (s306) a first candidate set of one or more tuples based on the first combined set of samples and an initial set of tuples comprising a plurality of tuples, wherein each tuple comprises a candidate preamble and a candidate delay, and wherein each candidate preamble comprises a set of samples. The method further includes using (s308) the first candidate set of one or more tuples to determine, for each cell included in the set of cells, whether a preamble included in the first candidate set of tuples was transmitted in the cell.

公开(公告)号：WO2021160258A1

公开(公告)日：2021-08-19

申请号：PCT/EP2020/053615

申请日：2020-02-12

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： ZHANG, Yang ,  MAURITZ, Oskar

IPC分类号： H04W56/00

摘要： There is provided mechanisms for determining time-of-arrival of a PRACH preamble. A method is performed by a radio access network node. The radio access network node is configured for beamformed communication in a set of beams. The method comprises receiving, from a UE and at a TRP of the radio access network node, a PRACH preamble. The method comprises determining a weight factor value for the PRACH preamble. The weight factor value is dependent on beam information mapped to the PRACH preamble. The beam information identifies one of the beams in the set of beams. The method comprises determining time-of-arrival of the PRACH preamble using hypothesis testing that incorporates the weight factor value.

公开(公告)号：WO2018160111A1

公开(公告)日：2018-09-07

申请号：PCT/SE2017/051303

申请日：2017-12-20

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： SAHLIN, Henrik ,  MAURITZ, Oskar ,  REIAL, Andres

IPC分类号： H04L5/00 ,  H04W74/08

摘要： An example method for transmitting a random access preamble comprises selecting (502) a random access preamble configuration from a plurality of predetermined random access preamble configurations. The method further includes determining (504) a time interval in which to transmit the random access preamble. The method further comprises transmitting (506) the random access preamble according to the selected random access preamble configuration. Each of the plurality of random access preamble configurations comprises a combination of (a) a single root sequence from a predetermined set of one or more root sequences, (b) a single cyclic shift of a predetermined plurality of cyclic shifts for the root sequence, and (c) a single starting position of two or more predetermined starting positions within time intervals allocated for random access preamble transmission.

公开(公告)号：WO2010020291A1

公开(公告)日：2010-02-25

申请号：PCT/EP2008/061031

申请日：2008-08-22

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  MAURITZ, Oskar

发明人： MAURITZ, Oskar

IPC分类号： H04J13/00

CPC分类号： H04W72/0466 ,  H04J13/0062 ,  H04J13/10 ,  H04J2011/0096 ,  H04L5/0048

摘要： The present invention generates exponents of elements of a Zadoff-Chu sequence representing a preamble for uplink synchronization of mobile stations or a mobile station reference signal by first obtaining (Sl) a preamble index defining the Zadoff-Chu sequence. Then it determines an initial exponent (S3) of the first element in the Zadoff-Chu sequence and an initial first difference (S2, S4) between exponents of consecutive elements of the Zadoff-Chu sequence. Finally it determines (S5-S9) exponents of the remaining elements in the Zad- off-Chu sequence from the initial first difference and the initial exponent in an iterative procedure that avoids multiplication operations.

摘要翻译： 本发明通过首先获得（S1）定义Zadoff-Chu序列的前导索引（S1）来生成表示用于移动站的上行链路同步的前导码或移动站参考信号的Zadoff-Chu序列的指数。 然后，确定Zadoff-Chu序列中的第一个元素的初始指数（S3）和Zadoff-Chu序列的连续元素的指数之间的初始第一个差值（S2，S4）。 最后，它从初始的第一个差值和避免乘法运算的迭代过程中的初始指数确定了Zad-off-Chu序列中剩余元素的指数（S5-S9）。

公开(公告)号：WO2021054873A1

公开(公告)日：2021-03-25

申请号：PCT/SE2019/050884

申请日：2019-09-19

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： MAURITZ, Oskar ,  YASINI, Sholeh ,  WIGREN, Torbjörn

IPC分类号： G01S5/00 ,  G01S11/10 ,  G01S5/02 ,  H04W64/00

摘要： A method for providing motion information of a UE (10) in a wireless communication system (1). The method comprises initiating, in a first network node (30, 20 A), of a first Doppler shift measurement concerning the UE. In the first network node, a transfer of requests for second Doppler shift measurement concerning the UE is initiated to second network nodes (30, 20B). Data representing the first Doppler shift measurement is obtained in the first network node. Data representing the second Doppler shift measurements is obtained in the first network node. An estimated motion, in more than one dimension, of the UE is determined in dependence of at least the obtained data representing the first Doppler shift measurement and the obtained data representing the second Doppler shift measurements. A method for assisting by the second network node, as well as network nodes performing the methods are also disclosed.