US 12,341,640 B2
Methods for reference signalling, transmitter nodes and receiver nodes
Olof Zander, Södra Sandby (SE); Erik Bengtsson, Eslöv (SE); Fredrik Rusek, Eslöv (SE); Kun Zhao, Malmö (SE); and Jose Flordelis, Lund (SE)
Assigned to SONY CORPORATION, Tokyo (JP)
Appl. No. 17/908,214
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Mar. 2, 2021, PCT No. PCT/EP2021/055170
§ 371(c)(1), (2) Date Aug. 30, 2022,
PCT Pub. No. WO2021/197742, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2050364-5 (SE), filed on Mar. 31, 2020.
Prior Publication US 2023/0127082 A1, Apr. 27, 2023
Int. Cl. H04L 27/26 (2006.01)
CPC H04L 27/2613 (2013.01) [H04L 27/2605 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, performed by a transmitter node of a communication system, for transmitting reference signalling, the method comprising:
transmitting, to one or more receiver nodes of the communication system, a reference signal sequence using a first antenna port and a carrier frequency; and
transmitting, to the one or more receiver nodes, using another antenna port and the same carrier frequency, a delayed version of the reference signal sequence, wherein the delay is non-zero, less than a symbol duration of the communication system, and is orthogonally polarized with a phase shift large enough to make the delayed version of the reference signal sequence independent to a polarization of the reference signal sequence.