公开(公告)号：US20190253989A1

公开(公告)日：2019-08-15

申请号：US16329891

申请日：2016-09-02

Applicant: Sony Mobile Communications Inc.

Inventor： Erik Bengtsson ,  Ove EDFORS ,  Fredrik TUFVESSON ,  Basuki PRIYANTO ,  Olof ZANDER

IPC: H04W56/00

CPC classification number: H04W56/001

Abstract: A sequence of downlink synchronization signals is transmitted to a device using a plurality of propagation channels. The plurality of propagation channels is selected according to an at least partly random pattern.

公开(公告)号：US20200014433A1

公开(公告)日：2020-01-09

申请号：US16494930

申请日：2017-03-17

Applicant: SONY MOBILE COMMUNICATIONS INC.

Inventor： Erik BENGTSSON ,  Ove EDFORS

IPC: H04B7/0456 ,  H04W72/04 ,  H04L5/00

Abstract: The present application relates to methods for operating a terminal device (31) and a base station (20) of a cellular wireless multiple-input and multiple-output, MIMO, system (10). An uplink precoding for transmitting uplink signals from a plurality of antenna elements (312) of the terminal device (31) to the base station (20) is determined. An uplink pilot signal using the uplink precoding and a radio resource of a transmission frame of the MIMO system is transmitted from the plurality of antenna elements (311). At the base station (20), a downlink precoding and uplink receive parameters are adjusted based on a receive property of the precoded uplink pilot signal from the terminal device (31).

公开(公告)号：US20190260433A1

公开(公告)日：2019-08-22

申请号：US16311523

申请日：2016-06-23

Applicant: Sony Mobile Communications Inc.

Inventor： Erik BENGTSSON ,  Fredrik RUSEK ,  Ove EDFORS

IPC: H04B7/0417 ,  H04L5/00

Abstract: A device controls each antenna to transmit at least one first UL pilot signal and to receive, for each first UL pilot signals DL data encoded according to the respective first UL pilot signal. The receive properties of the DL data are combined and a second UL pilot signal is determined based on the combined receive properties. The second UL pilot signal is repeatedly transmitted. The techniques may be applied in a massive multi-input multi-output scenario.