公开(公告)号：US20210119657A1

公开(公告)日：2021-04-22

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 ,  H04B1/14 ,  H04B1/10 ,  H03F1/32 ,  H03F3/24

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.

公开(公告)号：US20210298027A1

公开(公告)日：2021-09-23

申请号：US17203386

申请日：2021-03-16

Applicant: Nokia Solutions and Networks Oy

Inventor： Grzegorz HAZA ,  Vesa HÄYRYNEN ,  Radoslaw CESZKIEL

IPC: H04W72/04 ,  H04W4/80 ,  H04L27/26

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：US20230111822A1

公开(公告)日：2023-04-13

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: H04B1/00 ,  H04B1/04

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.