US 2020/0028550 A1 · FREQUENCY / TIME SELECTIVE PRECODING FOR POSITIONING REFERENCE SIGNALS

Abstract

Disclosed are techniques for transmitting and processing reference signals for positioning estimation over a multipath multiple-input multiple-output (MIMO) channel. In aspects, a first node configures first and second reference signal resource sets for transmission of first and second sets of reference signals, wherein the first and second reference signal resource sets occur on first and second subbands of, and/or during first and second time intervals on, the MIMO channel, wherein each reference signal resource in the first and second reference signal resource sets utilize at least first and second MIMO precoders, and transmits, to a second node over the MIMO channel, the first and second sets of reference signals, wherein the first node transmits the first and second sets of reference signals to assist the second node to perform a positioning measurement based on joint processing of the first and second sets of reference signals.

Claims30

Dependent claims

An apparatus for transmitting reference signals for positioning estimation over a multipath multiple-input multiple-output (MIMO) channel, comprising:

at least one processor of a first node configured to:
configure a first reference signal resource set for transmission of a first set of reference signals, wherein the first reference signal resource set occurs on a first subband of the MIMO channel and/or during a first time interval on the MIMO channel, and wherein each reference signal resource in the first reference signal resource set utilizes at least a first MIMO precoder;
and
configure a second reference signal resource set for transmission of a second set of reference signals, wherein the second reference signal resource set occurs on a second subband of the MIMO channel and/or during a second time interval on the MIMO channel, and wherein each reference signal resource in the second reference signal resource set utilizes at least a second MIMO precoder;
and
at least one transmitter of the first node configured to:
transmit, to a second node over the MIMO channel, the first set of reference signals using the first reference signal resource set on the first subband of the MIMO channel and/or during the first time interval on the MIMO channel;
and
transmit, to the second node over the MIMO channel, the second set of reference signals using the second reference signal resource set on the second subband of the MIMO channel and/or during the second time interval on the MIMO channel,
wherein the first node transmits the first and second sets of reference signals to assist the second node to perform a positioning measurement based on processing of the first and second sets of reference signals.

7 more elements

An apparatus for processing reference signals for positioning estimation over a multipath multiple-input multiple-output (MIMO) channel, comprising:

a transceiver of a second node configured to:
receive, from a first node, a first set of reference signals on a first reference signal resource set, wherein the first reference signal resource set occurs on a first subband of the MIMO channel and/or during a first time interval on the MIMO channel, and wherein each reference signal resource in the first reference signal resource set utilizes at least a first MIMO precoder;
and
receive, from the first node, a second set of reference signals on a second reference signal resource set, wherein the second reference signal resource set occurs on a second subband of the MIMO channel and/or during a second time interval on the MIMO channel, and wherein each reference signal resource in the second reference signal resource set utilizes at least a second MIMO precoder;
and
at least one processor of the second node configured to:
identify at least one reference signal transmitted on the first and second reference signal resource sets as following a line of sight (LOS) path between the second node and the first node;
and
perform a time difference of arrival (TDOA) measurement based on the at least one reference signal.

6 more elements

A method for transmitting reference signals for positioning estimation over a multipath multiple-input multiple-output (MIMO) channel performed by a first node, comprising:

configuring a first reference signal resource set for transmission of a first set of reference signals, wherein the first reference signal resource set occurs on a first subband of the MIMO channel and/or during a first time interval on the MIMO channel, and wherein each reference signal resource in the first reference signal resource set utilizes at least a first MIMO precoder;
configuring a second reference signal resource set for transmission of a second set of reference signals, wherein the second reference signal resource set occurs on a second subband of the MIMO channel and/or during a second time interval on the MIMO channel, and wherein each reference signal resource in the second reference signal resource set utilizes at least a second MIMO precoder;
transmitting, to a second node over the MIMO channel, the first set of reference signals using the first reference signal resource set on the first subband of the MIMO channel and/or during the first time interval on the MIMO channel;
and
transmitting, to the second node over the MIMO channel, the second set of reference signals using the second reference signal resource set on the second subband of the MIMO channel and/or during the second time interval on the MIMO channel,
wherein the first node transmits the first and second sets of reference signals to assist the second node to perform a positioning measurement based on joint processing of the first and second sets of reference signals.

3 more elements

A method for processing reference signals for positioning estimation over a multipath multiple-input multiple-output (MIMO) channel performed by a second node, comprising:

receiving, from a first node, a first set of reference signals on a first reference signal resource set, wherein the first reference signal resource set occurs on a first subband of the MIMO channel and/or during a first time interval on the MIMO channel, and wherein each reference signal resource in the first reference signal resource set utilizes at least a first MIMO precoder;
receiving, from the first node, a second set of reference signals on a second reference signal resource set, wherein the second reference signal resource set occurs on a second subband of the MIMO channel and/or during a second time interval on the MIMO channel, and wherein each reference signal resource in the second reference signal resource set utilizes at least a second MIMO precoder;
identifying at least one reference signal transmitted on the first and second reference signal resource sets as following a line of sight (LOS) path between the second node and the first node;
and
performing a time difference of arrival (TDOA) measurement based on the at least one reference signal.

2 more elements

Dependencies are inferred from the claim text.

Frequency / time selective precoding for positioning reference signals

Life of this patent

Frequency / time selective precoding for positioning reference signals

Life of this patent

Abstract

Claims30