公开(公告)号：US11637573B1

公开(公告)日：2023-04-25

申请号：US17962801

申请日：2022-10-10

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Gunter Wolff ,  Radoslaw Ceszkiel ,  Grzegorz Haza ,  Björn Jelonnek ,  Michael Weber

IPC: H04B1/04 ,  H04B1/00

Abstract: An apparatus comprises a digital processing device configured to generate a digital transmission signal, a digital-to-analog converter connected to the digital processing device and configured to convert the digital transmission signal into an analog transmission signal, and a power amplifier connected to the digital-to-analog converter and configured to amplify the analog transmission signal. An antenna filter is connected to the power amplifier and configured to filter the amplified analog transmission signal; the antenna filter is configured to pass frequencies in at least one passband and to attenuate frequencies in at least one stopband. The digital processing device is configured to perform a process of reducing peak power in the digital transmission signal; in this process error components having different frequencies are produced. A frequency spectrum of the error components is manipulated such that a part of the error components is deposited in the stopband of the antenna filter.

公开(公告)号：US11751230B2

公开(公告)日：2023-09-05

申请号：US17203386

申请日：2021-03-16

Applicant: Nokia Solutions and Networks Oy

Inventor： Grzegorz Haza ,  Vesa Häyrynen ,  Radoslaw Ceszkiel

IPC: H04W4/80 ,  H04W72/53 ,  H04L27/26 ,  H04W72/0446 ,  H04W72/0453

CPC classification number: H04W72/53 ,  H04L27/2607 ,  H04L27/2623 ,  H04W4/80 ,  H04W72/0446 ,  H04W72/0453

Abstract: An apparatus, method and computer program is described comprising: receiving a first signal comprising one or more carrier signals comprising a plurality of resource blocks, wherein each resource block is assigned to a unique frequency and time slot of the respective carrier signal; generating a clipping pulse by modifying said first signal; converting the clipping pulse signal into a plurality of narrowband signals, wherein each narrowband signal is a frequency slice of the clipping pulse signal; modifying the plurality of narrowband signals to generate a plurality of modified narrowband signals, wherein said modifying is controlled based on filter weights that define a level of noise to be added to the respective narrowband signals in accordance with a desired error vector magnitude distribution or clipping noise distribution.

公开(公告)号：US11228330B2

公开(公告)日：2022-01-18

申请号：US17066960

申请日：2020-10-09

Applicant: Nokia Solutions and Networks Oy

Inventor： Grzegorz Haza ,  Radoslaw Ceszkiel ,  Gunter Wolff ,  Björn Jelonnek

IPC: H04B1/12 ,  H03F1/32 ,  H03F3/24 ,  H04B1/10 ,  H04B1/14

Abstract: A method comprising: obtaining a first radio signal and a second radio signal, determining a first envelope signal based on the first radio signal and a second envelope signal based on the second radio signal, determining a preview envelope signal based on the first envelope signal and the second envelope signal, determining a common clipping gain signal based on the preview envelope signal, determining a first clipping gain signal based on the common clipping gain signal and a first weighing factor, determining a second clipping gain signal based on the common clipping gain signal and a second weighing factor, performing a first crest factor reduction for the first radio signal utilizing the first clipping gain signal, and performing a second crest factor reduction for the second radio signal utilizing the second clipping gain signal.