Operating a terminal device and a base station in a wireless mimo system
AssigneeSony Group Corporation
InventorsErik BENGTSSON, Ove EDFORS
Life of this patent
Estimating the term…
Abstract
The present application relates to methods for operating a terminal device and a base station of a cellular wireless multiple-input and multiple-output, MIMO, system. An uplink precoding for transmitting uplink signals from a plurality of antenna elements of the terminal device to the base station 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. At the base station, a downlink precoding and uplink receive parameters are adjusted based on a receive property of the precoded uplink pilot signal from the terminal device.
Claims16
A method for operating a terminal device of a multiple-input and multiple-output (MIMO) system, the method comprising:
- transmitting, from each individual antenna element of a plurality of antenna elements of the terminal device, corresponding raw uplink pilot signals on a dedicated time and frequency resource;
- before transmitting precoded uplink pilot signals to a base station of the MIMO system, receiving, from the base station in response to transmitting from each individual antenna element the corresponding raw uplink pilot signals, an uplink precoding information assigned to a radio resource of a transmission frame of the MIMO system for transmitting uplink signals from the plurality of antenna elements of the terminal device to the base station, wherein the uplink precoding information is determined based on a plurality of receive properties of the raw uplink pilot signals;
- determining, at the terminal device, an uplink precoding assigned to the radio resource based on the uplink precoding information;
- and
- transmitting, from the plurality of antenna elements, an uplink pilot signal assigned to the radio resource using the uplink precoding.
A method for operating a base station of a multiple-input and multiple-output (MIMO) system the method comprising:
- before receiving precoded uplink pilot signals from a terminal device, receiving raw uplink pilot signals, the raw uplink pilot signals being transmitted from each individual antenna element of a plurality of antenna elements of the terminal device on a dedicated time and frequency resource;
- determining a downlink precoding and uplink receive parameters for communicating signals between a plurality of antenna elements of the base station and the terminal device using a radio resource of a transmission frame of the MIMO system based on a plurality of receive properties of the received raw uplink pilot signals;
- transmitting uplink precoding information assigned to the radio resource to the terminal device, the uplink precoding information being determined based on the plurality of receive properties of the received raw uplink pilot signals;
- receiving, at the plurality of antenna elements of the base station, an uplink pilot signal assigned to the radio resource, wherein the uplink pilot signal is transmitted from the terminal device using the uplink precoding information;
- and
- adjusting the downlink precoding and the uplink receive parameters based on a receive property of the uplink pilot signal.
A terminal device for a multiple-input and multiple-output (MIMO) system, the terminal device comprising:
- a plurality of antenna elements;
- and
- one or more processors configured to perform operations comprising:
- transmitting, from each individual antenna element of a plurality of antenna elements of the terminal device, corresponding raw uplink pilot signals on a dedicated time and frequency resource;
- before transmitting precoded uplink pilot signals to a base station of the MIMO system, receiving, from the base station in response to transmitting from each individual antenna element the corresponding raw uplink pilot signals, an uplink precoding information assigned to a radio resource of a transmission frame of the MIMO system for transmitting uplink signals from the plurality of antenna elements of the terminal device to the base station, wherein the uplink precoding information is determined based on a plurality of receive properties of the raw uplink pilot signals;
- determining, at the terminal device, an uplink precoding assigned to the radio resource based on the uplink precoding information;
- and
- transmitting, via the plurality of antenna elements, an uplink pilot signal assigned to the radio resource using the uplink precoding.
A base station for a multiple-input and multiple-output (MIMO) system, the base station comprising:
- a plurality of antenna elements;
- and
- one or more processors configured to perform operations comprising:
- before receiving precoded uplink pilot signals from a terminal device, receiving raw uplink pilot signals, the raw uplink pilot signals being transmitted from each individual antenna element of a plurality of antenna elements of the terminal device on a dedicated time and frequency resource;
- determining a downlink precoding and uplink receive parameters for communicating signals between the plurality of antenna elements and the terminal device using a radio resource of a transmission frame of the MIMO system based on a plurality of receive properties of the received raw uplink pilot signals;
- transmitting uplink precoding information assigned to the radio resource to the terminal device, the uplink precoding information being determined based on the plurality of receive properties of the received raw uplink pilot signals;
- receiving, at the plurality of antenna elements, an uplink pilot signal assigned to the radio resource, wherein the uplink pilot signal is transmitted from the terminal device using the uplink precoding information;
- and
- adjusting the downlink precoding and the uplink receive parameters based on a receive property of the uplink pilot signal.
Dependencies are inferred from the claim text.