US 11,895,053 B2Granted

CDM8 based CSI-RS designs for MIMO

AssigneeTelefonaktiebolaget LM Ericsson (publ)

InventorsSiva Muruganathan, Shiwei Gao, Robert Mark Harrison

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Abstract

A network node, wireless device, base station, user equipment and corresponding methods are provided. The network node includes processing circuitry configured to: select a first set and second set of reference signal resources in a subframe and aggregate the first set and second set of reference signal resources in the subframe to form a code division multiplexing, CDM, aggregation configuration. The first set and second set of reference signal resources in the subframe satisfy a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols. The first set and second set of reference signal resources in the subframe satisfy a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.

Claims16

Dependent claims

A wireless device, comprising:

processing circuitry configured to:
receive a code division multiplexing, CDM, aggregation configuration for a CDM-8 design for a plurality of CSI-RS, Channel System Information-Reference Signal, antenna ports, the CDM aggregation configuration corresponding to an aggregated first set and second set of reference signal resources in a subframe, the CDM aggregation configuration being an aggregation of two CDM-4 orthogonal cover codes, the two CDM-4 orthogonal cover codes being selected from a constrained set of pairs that are selected to minimize loss of orthogonality of a length 8 cover code;
perform channel estimation based on the CDM aggregation configuration;
the first set and second set of reference signal resources satisfying a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols;
and
the first set and second set of reference signal resources satisfy a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.

3 more elements

A method for a wireless device, the method comprising:

receiving a code division multiplexing, CDM, aggregation configuration for a CDM-8 design for a plurality of CSI-RS, Channel System Information-Reference Signal, antenna ports, the CDM aggregation configuration corresponding to an aggregated first set and second set of reference signal resources in a subframe, the first set and second set of reference signal resources, the CDM aggregation configuration being an aggregation of two CDM-4 orthogonal cover codes, the two CDM-4 orthogonal cover codes being selected from a constrained set of pairs that are selected to minimize loss of orthogonality of a length 8 cover code;
performing channel estimation based on the CDM aggregation configuration;
the first set and second set of reference signal resources satisfying a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols;
and
the first set and second set of reference signal resources satisfying a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/855,981Filed 1 Jul 2022 · continuation
Priority: 30 Sep 2016
Published: US 2022/0407654 A122 Dec 2022
Granted: 6 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04L 5/0048
Arrangements for allocating sub-channels of the transmission path: allocation of pilot signals, i.e. of signals known to the receiver
H04L 5/0026
Arrangements for dividing the transmission path: division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]
H04L 5/0092
Signalling for the administration of the divided path, e.g. signalling of configuration information: indication of how the channel is divided
H04L 25/0226
Using sounding signals: sounding signals per se

Family

Application62/403,044Us provisional application · filed 30 Sep 2016
PCT/IB2017/056048Parent of this continuation · filed 30 Sep 2017
Application16/352,433Parent of this continuation · filed 13 Mar 2019
US 10,931,418 B2Parent of this continuation · filed 23 Feb 2021
US 2022/0407654 A1Pre-grant publication · published 22 Dec 2022
US 11,398,887 B2Parent of this continuation
Application15/764,062Parent of this continuation
US 2019/0058557 A1Published application
US 2019/0273593 A1Published application
US 11,895,053 B2This patent

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