公开(公告)号：US20230370101A1

公开(公告)日：2023-11-16

申请号：US18195003

申请日：2023-05-09

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Toni Aleksi LEVANEN ,  Carlos BAQUERO BARNETO

IPC: H04B1/10

CPC classification number: H04B1/10

Abstract: This document discloses a solution for reducing a frequency offset. According to an aspect, a method comprises: acquiring a signal distorted by the frequency offset; estimating a frequency offset estimate describing the frequency offset; computing coefficients for a frequency-domain filter on the basis of a relation between the frequency offset estimate and a combination of the frequency offset estimate and an index of the frequency-domain filter; and performing frequency-domain filtering of the signal by using the computed coefficients.

公开(公告)号：US20220377759A1

公开(公告)日：2022-11-24

申请号：US17749663

申请日：2022-05-20

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Mikko SIMONEN ,  Toni Aleksi LEVANEN ,  Lasse HARJU

IPC: H04W72/12 ,  H04L5/00

Abstract: According to an aspect, there is provided an apparatus for a radio receiver or transceiver of a first access node. The apparatus is configured to perform the following. Upon receiving data via at least one antenna, the apparatus performs resource mapping on the received data based on scheduling information defining currently allocated uplink time-frequency resources to isolate at least a first data set corresponding to non-allocated uplink time-frequency resources. The apparatus compares the first data set against one or more first pre-defined criteria for detecting interference. In response to detecting interference in the first data set according to said one or more first pre-defined criteria, the apparatus instructs a scheduler entity of the first access node to avoid scheduling uplink time-frequency resources affected by said interference.

公开(公告)号：US20240007333A1

公开(公告)日：2024-01-04

申请号：US18200844

申请日：2023-05-23

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Toni Aleksi LEVANEN

IPC: H04L25/03 ,  H04L25/02 ,  H04B7/08

CPC classification number: H04L25/03006 ,  H04L25/0212 ,  H04B7/08 ,  H04L25/021

Abstract: A method and apparatus comprises acquiring set of input streams associated with a spatial layer configured for a terminal device, and estimating a channel vector h representing a radio channel response associated with the spatial layer. An interference covariance matrix R representing power of interference is computed from at least one other spatial layer in the set of input streams and correlation of the interference within the set of input streams of the spatial layer. A per-layer interference rejection is performed, combining equalization on the set of input streams, comprising: a) estimating x=R−1h as a combination of a set of linear equations, wherein the number of linear equations is defined by an input parameter to be equal to or smaller than dimensions of the interference covariance matrix; and b) computing an estimate of a transmitted symbol on the basis of the channel vector and the estimated x.