公开(公告)号：US20240187049A1

公开(公告)日：2024-06-06

申请号：US18284325

申请日：2022-03-16

Applicant: Nokia Technologies Oy

Inventor： Pavan Koteshwar Srinath ,  Karthik KUNTIKANA SHRIKRISHNA

IPC: H04B7/0456 ,  H04L25/03

CPC classification number: H04B7/0456 ,  H04L25/03165 ,  H04L2025/03464

Abstract: A method and an apparatus for decoding a signal at a receiver in a MIMO communication system is described. A signal y is obtained over a channel from a plurality of transmitters in communication with the receiver, the signal y includes data signals transmitted on a plurality of layers N. A concatenated matrix R representing the channel between the plurality of transmitters and the receiver is obtained based on an estimated channel matrix H. An ordered list is determined based at least on the signal y and the obtained concatenated matrix R. The ordered list is a list of N-dimensional vectors and each vector is a candidate constellation point for the transmitted data signal based on a predefined metric, and is determined using a list search block configured to implement a machine learning algorithm.

公开(公告)号：US12278782B2

公开(公告)日：2025-04-15

申请号：US17794310

申请日：2020-01-24

Applicant: Nokia Technologies Oy

Inventor： Pavan Koteshwar Srinath ,  Fahad Syed Muhammad ,  Afef Feki ,  Veronique Capdevielle

IPC: H04L5/00 ,  G06N3/08

Abstract: An apparatus, method and computer program is described including: obtaining first channel measurement data for a primary component carrier used for communications between a device and a network node of a mobile communication system; providing the first channel measurement data as an input to an algorithm to obtain a first embedding output; comparing the first embedding output with embedding outputs of a plurality of reference channel measurement data input to said algorithm to identify a closest reference channel measurement data to the first channel measurement data; identifying a set of reference channel information associated with the identified closest reference channel measurement data, wherein the identified set of reference channel information includes a carrier aggregation policy defining one or more secondary communication channels; and setting a carrier aggregation policy for the primary component carrier in accordance with the carrier aggregation policy.

公开(公告)号：US12273854B2

公开(公告)日：2025-04-08

申请号：US17924947

申请日：2021-05-07

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Pavan Koteshwar Srinath ,  Jakob Hoydis

IPC: H04W64/00 ,  H04B7/06 ,  H04W24/02 ,  G06N3/02

Abstract: According to the present disclosure, a first dataset comprising CSI measurements associated with first UEs and actual positions of the first UEs within a coverage region of a network node is received. Then, a second dataset comprising at least one CSI measurement associated with at least one second UE whose position within the coverage region of the network node is to be estimated is received. After that, based on the first and second datasets, the at least one CSI measurement associated with the at least one second UE is assigned to one of the first UEs that appears closest to the at least one second UE. Finally, the position of the at least one second UE within the coverage region of the network node is estimated by using a semi-supervised machine learning algorithm that receives the first and second datasets and the actual position of the closest first UE.

公开(公告)号：US11387870B2

公开(公告)日：2022-07-12

申请号：US17518199

申请日：2021-11-03

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Pavan Koteshwar Srinath ,  Jakob Hoydis

IPC: H04B7/0413 ,  H04L25/02

Abstract: Embodiments can include receiving transmissions over a channel at a receiver of a MIMO communication system; the transmissions are received from a plurality of transmitters in communication with the receiver. Each communication is a separate communication having a modulation and coding scheme. An estimate of the channel is converted into an estimate, for each of a plurality of transmitters, of a bit-metric decoding rate for each of a plurality of MIMO detectors. The estimated bit-metric decoding rate for each of the transmitters for each of the MIMO detectors is converted into an estimated bit error rate for each of the MIMO detectors for each of the transmitters. One of the MIMO detectors is selected for use in generating log-likelihood ratios for bits transmitted from the transmitters to the receiver. The one of the MIMO detectors is selected based on the estimated bit-error rates and a target block error rate.

公开(公告)号：US11736899B2

公开(公告)日：2023-08-22

申请号：US17145955

申请日：2021-01-11

Applicant: Nokia Technologies Oy

Inventor： Pavan Koteshwar Srinath ,  Jakob Hoydis

IPC: H04W4/029 ,  G01S5/02

CPC classification number: H04W4/029 ,  G01S5/0246

Abstract: An apparatus, method and computer program is described comprising: generating a first loss function component comprising comparing first location data with first location estimates, wherein the first location estimates are based on channel state data, wherein the first location estimates are generated using a model, and wherein the model comprises a plurality of trainable parameters; generating a second loss function component comprising comparing the first location data with second location estimates, wherein the second location estimates are based on channel state data that have been subjected to a first augmentation and wherein the second location estimates are generated using the model; generating a third loss function component comprising comparing third location estimates based on channel state data and fourth location estimates based on channel state data that have been subjected to a second augmentation, wherein the third and fourth location estimates are generated using the model; and training the trainable parameters of the model by minimising a loss function based on a combination of the first, second and third loss function components.