公开(公告)号：US20170245102A1

公开(公告)日：2017-08-24

申请号：US15503832

申请日：2014-09-10

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Miguel Lopez ,  Benny Lennartson ,  Krister Sundberg

IPC: H04W4/02 ,  G01S5/02 ,  H04B17/336 ,  H04W72/04 ,  H04W24/08 ,  H04B17/327

Abstract: It is presented a method for determining a position of a wireless device within a single radio cell served by a plurality of remote radio heads. The method is performed in a position determination node and comprises the steps of: receiving a measured power signature comprising at least two, in time separated, power measurement values of a downlink signal, the measured power signature originating from the wireless device; comparing the measured power signature with a set of reference power signatures, wherein each one of the plurality of remote radio heads is associated with a reference power signature and the reference power signatures differ for at least two of the plurality of remote radio heads; and determining a position in that the wireless device is in the vicinity of one of the at least one remote radio head whose reference power signature best matches the measured power signature.

公开(公告)号：US20230023283A1

公开(公告)日：2023-01-26

申请号：US17778049

申请日：2020-12-23

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Benny Lennartson ,  Mats Blomgren ,  Jin Ellgardt ,  Erik Nilsson

IPC: H04W24/10 ,  H04B17/336

Abstract: Systems and methods for identifying Passive Intermodulation (PIM) products are disclosed. Some embodiments use RAN Performance Measurement (PM) counters, of actual DL Traffic Load to correlate with UL noise and interference counters. By using counters, the DL traffic is correlated to the increase in noise and interference in order to determine which DL carrier combinations are causing degradation to which UL carriers. In this way, aggressor-victim grouping can be identified through normal downlink traffic load with uplink interference to identify passive intermodulation products. This can be done for all aggressor-victim groups within a radio base station site or cluster of sites. Also, some embodiments enable estimating the maximum PIM interference created by the aggressor carriers. This helps operators to quantify the impact of PIM and can enable them to take counter measures. These embodiments are Radio Access Technology (RAT) agnostic and operator agnostic for the aggressors within a site.

公开(公告)号：US20230308312A1

公开(公告)日：2023-09-28

申请号：US18014347

申请日：2020-07-07

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Henrik Asplund ,  Martin Johansson ,  David Astely ,  Karl Werner ,  Benny Lennartson

IPC: H04L25/02 ,  H04B17/12 ,  H04B17/21 ,  H04B17/24

CPC classification number: H04L25/021 ,  H04B17/12 ,  H04B17/21 ,  H04B17/24 ,  H04L25/0224

Abstract: Method and one or more first devices for supporting calibration of a multi-antenna array comprised in a first antenna device operative with a wireless communication network. The first device(s) provide phase correcting information, to be used in calibration of the multi-antenna array, based on covariances corresponding to recurrent displacement vectors of the multi-antenna array. Said covariances being based on channel estimates estimated from certain radio signals received after transmission over radio propagation channels between said multi-antenna array of the first antenna device and one or more second antenna devices operative with the wireless communication network.

公开(公告)号：US10771916B2

公开(公告)日：2020-09-08

申请号：US15503832

申请日：2014-09-10

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Miguel Lopez ,  Benny Lennartson ,  Krister Sundberg

IPC: H04W4/02 ,  G01S5/02 ,  H04W64/00 ,  H04B17/327 ,  H04B17/336 ,  H04W24/08 ,  H04W72/04 ,  H04W88/08

Abstract: It is presented a method for determining a position of a wireless device within a single radio cell served by a plurality of remote radio heads. The method is performed in a position determination node and comprises the steps of: receiving a measured power signature comprising at least two, in time separated, power measurement values of a downlink signal, the measured power signature originating from the wireless device; comparing the measured power signature with a set of reference power signatures, wherein each one of the plurality of remote radio heads is associated with a reference power signature and the reference power signatures differ for at least two of the plurality of remote radio heads; and determining a position in that the wireless device is in the vicinity of one of the at least one remote radio head whose reference power signature best matches the measured power signature.