公开(公告)号：US20240396767A1

公开(公告)日：2024-11-28

申请号：US18696159

申请日：2021-10-07

Applicant: Nokia Solutions and Networks Oy

Inventor： Yejian CHEN ,  Jafar MOHAMMADI ,  Stefan WESEMANN ,  Thorsten WILD

IPC: H04L25/02

Abstract: A method of channel estimation for a receiver side antenna array includes receiving a first signal associated with a pilot tone transmitted by a transmitter side antenna array, obtaining a first group of neural network models trained for channel estimation based on the pilot tone, inputting a representation of the received first signal into each neural network model of the first group, performing one-dimensional interpolation for second signals associated with data tones in at least one of time domain and frequency domain, obtaining a second group of neural network models trained for channel estimation in presence of interpolation errors based on the data tones, and for each one-dimensional interpolation, inputting an interpolated channel estimate of the generated interpolated channel estimates into each neural network model of the second group and generating a corrected interpolated channel estimate for a second signal.

公开(公告)号：US20250168658A1

公开(公告)日：2025-05-22

申请号：US18939723

申请日：2024-11-07

Applicant: Nokia Solutions and Networks Oy

Inventor： Jafar MOHAMMADI ,  Antti Herman KOSKELA ,  Chaitanya AGGARWAL

IPC: H04W24/02 ,  H04L41/14 ,  H04W24/10 ,  H04W64/00

Abstract: Privacy auditing by storing a dataset comprising first data and second data for at least one User Equipment; storing ground truth labels for the first data and the second data; sending information based on the dataset to a network function; receiving, from the network function, information for determining a first value of a loss function; receiving, from the network function, information for determining a second value of the loss function; determining a difference between the first value of the loss function and the second value of the loss function; comparing the difference to a threshold to determine whether a Differential Privacy mechanism was applied to the first data before the network function trained the machine learning model based on the first data.

公开(公告)号：US20250062846A1

公开(公告)日：2025-02-20

申请号：US18792004

申请日：2024-08-01

Applicant: Nokia Solutions and Networks Oy

Inventor： Jafar MOHAMMADI ,  Dileepa MARASINGHE ,  Le Hang NGUYEN ,  Yejian CHEN

IPC: H04B17/391 ,  H04L25/02 ,  H04L27/36

Abstract: Disclosed is a method comprising providing to a machine learning model, as an input, a channel estimation or a plurality of raw pilots, obtaining, from the machine learning model, as an output, a label indicating a channel model, wherein the channel model is representative of channel conditions, based on the label, determining a waveform associated with the channel conditions, indicating the waveform to the receiver, and performing the transmission to the receiver using the waveform.

公开(公告)号：US20230094649A1

公开(公告)日：2023-03-30

申请号：US17953828

申请日：2022-09-27

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Jafar MOHAMMADI ,  Paolo BARACCA ,  Mahmoud RAMEZANI-MAYIAMI ,  Silvio MANDELLI ,  Andreas WEBER

IPC: H04L1/00 ,  H04W24/02

Abstract: A modulation and coding scheme for a transmission to an apparatus may be selected by at least sampling a posteriori probability distribution that has been calculated using a first probability distribution and a second probability distribution. The first probability distribution is calculated using at least a newest first feedback and a plurality of older first feedbacks, a first feedback indicating channel quality. The second probability distribution is calculated using at least a newest second feedback and a plurality of older second feedbacks, a second feedback indicating a success or failure of an earlier transmission transmitted from the apparatus.