US 12,119,973 B2 · Sounding reference signals for positioning

Abstract

Sounding reference signals (SRS) transmitted by a UE, e.g., for positioning or channel estimation, may be configured for one or both of frequency tone level cyclic shift and symbol level code, which, for example, enables multiplexing a greater number of UEs. The frequency tone level cyclic shift is produced by jointly processing a number of symbols with an extended cyclic shift structure. The SRS may be configured using a symbol group level that indicates the number of symbols associated with a cyclic shift structure, and an outer code that indicates a multiplier applied to the SRS at the symbol level, which increases the multiplexing opportunities. The symbol level code may further indicate an extended cyclic shift indicating a linear increase in phase rotation across tones in symbols associated with the symbol group level.

Claims30

Dependent claims

An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory;
and
at least one processor coupled to the at least one memory, and based at least in part on instructions stored in the at least one memory, the at least one processor is configured to:
receive a configuration for sounding reference signals (SRS) from a base station, the configuration for the SRS comprising (1) a symbol group level indicating a number of symbols associated with a cyclic shift structure or (2) an outer code indicating a multiplier applied to the SRS at a symbol level;
and
transmit, to one or more base stations, the SRS according to the configuration for the SRS comprising the symbol group level or the outer code.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/461,444Filed 5 Sep 2023 · continuation

Priority

19 Aug 2020

Published

US 2023/0421422 A128 Dec 2023

Granted

15 Oct 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 27/2607
Symbol extensions, e.g. Zero Tail, Unique Word [UW]: cyclic extensions
H04L 5/0051
Allocation of pilot signals, i.e. of signals known to the receiver: of dedicated pilots, i.e. pilots destined for a single user or terminal
H04L 27/26035
Signal structure: maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences
H04L 27/2613
Details of reference signals: structure of the reference signals

Family

Application63/067,841Us provisional application · filed 19 Aug 2020

Application63/068,948Us provisional application · filed 21 Aug 2020

Application17/404,884Parent of this continuation · filed 17 Aug 2021

US 2023/0421422 A1Pre-grant publication · published 28 Dec 2023

US 11,811,570 B2Parent of this continuation

US 2022/0060359 A1Published application

US 12,119,973 B2This patent

From the US filing history. Foreign family members aren’t listed.

Sounding reference signals for positioning

Life of this patent

Sounding reference signals for positioning

Life of this patent

Abstract

Claims30