公开(公告)号：US10531416B2

公开(公告)日：2020-01-07

申请号：US15823274

申请日：2017-11-27

Applicant: Sequans Communications S.A.

Inventor： Ioannis Xirouchakis ,  Serdar Sezginer

IPC: H04W56/00 ,  H04W72/04 ,  H04W74/08

Abstract: A method of synchronizing uplink between a UE and a cell, the method comprising determining PRACH capabilities of the UE, determining a negative timing offset for use with the transmission of at least one PRACH signal, determining an order for utilizing the negative timing offset, transmitting from the UE, at least one PRACH signal from a group of N PRACH signals, each of the at least one PRACH signals having a predetermined power level and transmitted by the UE at a time based on the negative timing offset, the order, and the PRACH capabilities of the UE.

公开(公告)号：US20180152904A1

公开(公告)日：2018-05-31

申请号：US15823274

申请日：2017-11-27

Applicant: Sequans Communications S.A.

Inventor： Ioannis Xirouchakis ,  Serdar Sezginer

IPC: H04W56/00 ,  H04W72/04 ,  H04W74/08

CPC classification number: H04W56/005 ,  H04W56/001 ,  H04W56/003 ,  H04W56/0045 ,  H04W56/006 ,  H04W72/0406 ,  H04W72/0446 ,  H04W74/085

Abstract: A method of synchronizing uplink between a UE and a cell, the method comprising determining PRACH capabilities of the UE, determining a negative timing offset for use with the transmission of at least one PRACH signal, determining an order for utilizing the negative timing offset, transmitting from the UE, at least one PRACH signal from a group of N PRACH signals, each of the at least one PRACH signals having a predetermined power level and transmitted by the UE at a time based on the negative timing offset, the order, and the PRACH capabilities of the UE.

公开(公告)号：US10892885B2

公开(公告)日：2021-01-12

申请号：US16387190

申请日：2019-04-17

Applicant: Sequans Communications S.A.

Inventor： Ioannis Xirouchakis ,  Karim El Asmar

IPC: H04L7/00 ,  H04B17/336 ,  H04B1/10 ,  H04L27/26

Abstract: A method of evaluating OFDM synchronization between a transmitter and a receiver, the method carried out at the receiver and comprising, obtaining a non-coherent channel power estimate, obtaining a coherent channel power estimate, comparing the two estimates, and determining whether the receiver and the transmitter are synchronized based on the comparison.

公开(公告)号：US20200336281A1

公开(公告)日：2020-10-22

申请号：US16387190

申请日：2019-04-17

Applicant: Sequans Communications S.A.

Inventor： Ioannis Xirouchakis ,  Karim El Asmar

IPC: H04L7/00 ,  H04L27/26 ,  H04B1/10 ,  H04B17/336

Abstract: A method of evaluating OFDM synchronization between a transmitter and a receiver, the method carried out at the receiver and comprising, obtaining a non-coherent channel power estimate, obtaining a coherent channel power estimate, comparing the two estimates; and determining whether the receiver and the transmitter are synchronized based on the comparison.