公开(公告)号：US20240259839A1

公开(公告)日：2024-08-01

申请号：US18565171

申请日：2021-05-31

Applicant: Nokia Solutions and Networks Oy

Inventor： Dani Johannes KORPI ,  Mikko Johannes HONKALA ,  Janne Matti Juhani HUTTUNEN ,  Faycal AIT AOUDIA ,  Jakob HOYDIS

IPC: H04W24/02 ,  H04L5/00

CPC classification number: H04W24/02 ,  H04L5/0007

Abstract: According to an example embodiment, a radio transmitter includes at least one processor and at least one memory including computer program code. The at least one memory and the computer program code may be configured to, with the at least one processor, cause the radio transmitter to obtain bits to be transmitted; map the bits into a symbol grid in time-frequency domain; modulate the symbol grid into a first time-domain waveform; input the first time-domain waveform into a machine learning model, producing a second time-domain waveform; power amplify the second time-domain waveform, producing an amplified time-domain waveform; and transmit the amplified time-domain waveform. A radio transmitter, a method and a computer program product are disclosed.

公开(公告)号：US20240187285A1

公开(公告)日：2024-06-06

申请号：US18286276

申请日：2021-04-15

Applicant: Nokia Solutions and Networks Oy

Inventor： Wenliang QI ,  Wenyi XU ,  Chenhui YI ,  Jiaqi QUAN ,  Jakob HOYDIS

IPC: H04L25/02 ,  H04W64/00

CPC classification number: H04L25/0254 ,  H04L25/0226 ,  H04W64/006

Abstract: Embodiments of the present disclosure relate to machine learning for channel estimation against diverse Doppler effects. In this solution, the first device receives user data in a slot from a second device via a channel between the first device and the second device, the user data includes a reference symbol. Then, the first device performs, with a NN, a first channel estimation for the channel based on information on velocity of a second device and a result of a second channel estimation for the channel. The second channel estimation is performed based on the received reference symbol. After that, the first device transmits, to the second device, an indication of a result of the first channel estimation. With this solution, channel estimation is able to be performed in diverse scenarios (e.g., diverse Doppler scenarios, high-velocity scenarios and the like) with low overheads in reference signals (e.g., 1 DMRS), thereby reducing network consumption.

公开(公告)号：US20240388333A1

公开(公告)日：2024-11-21

申请号：US18687031

申请日：2021-08-27

Applicant: Nokia Solutions and Networks Oy

Inventor： Pavan KOTESHWAR SRINATH ,  Jakob HOYDIS

IPC: H04B7/0452 ,  H04L1/00 ,  H04L25/02

Abstract: In one embodiment, an apparatus is configured to perform estimating a channel of a multi-user multiple-input-multiple-output mobile communication system; determining, based on the estimated channel, a metric for each of a plurality of available modulation orders for each of a plurality of transmitting channels of said communication system; identifying, for each transmitting channel, one or more modulation and coding schemes for which the predicted metric meets a target error rate criterion, wherein each modulation and coding scheme comprises a modulation order and a code rate of a channel code; and selecting a modulation and coding scheme for each of said transmitting channels from said identified modulation and coding schemes.

公开(公告)号：US20210067181A1

公开(公告)日：2021-03-04

申请号：US16961103

申请日：2018-02-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Jakob HOYDIS ,  Maximilian ARNOLD ,  Marc GAUGER ,  Stephan TEN BRINK

IPC: H04B1/04 ,  H04B1/16 ,  H04B1/40

Abstract: A receiver, a system and a method is described comprising: receiving radio frequency signals at a plurality of receiver modules, wherein each receiver module comprises a plurality of channels, each channel comprising a receiver antenna and a mixer for converting an output of the respective antenna to an analog intermediate frequency signal having a frequency; for each of the plurality of receiver modules, combining the analog intermediate frequency signals of the respective channels into a receiver module analog intermediate frequency signal; and combining the receiver module analog intermediate frequency signals for each of the plurality of receiver modules into a composite output signal, wherein the frequency of the intermediate frequency signal of each channel of each receiver module is different. A similar transmitter, method and transmission system is also described.