公开(公告)号：US20230081201A1

公开(公告)日：2023-03-16

申请号：US17797505

申请日：2020-02-10

Applicant: Nokia Solutions and Networks Oy

Inventor： Marko Fleischer ,  Jan HELLMANN ,  Rene ROSCHKE ,  Helmut HEINZ

IPC: H04B7/06

Abstract: The present subject matter relates to an apparatus for a communication system. The apparatus is configured for: for each beam direction of a set of beam directions of an antenna array of the communication system, determining a level of a passive intermodulation, PIM, signal at a receiver of the communication system, the PIM signal being caused by a set of signals transmitted by the antenna array in the beam direction, identifying beam directions of the set of beam directions whose PIM level is higher than a predefined threshold, adapting a beamforming of signals in at least part of the identified beam directions to mitigate the PIM level at the receiver.

公开(公告)号：US20220109462A1

公开(公告)日：2022-04-07

申请号：US17487528

申请日：2021-09-28

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Marko FLEISCHER ,  Jan HELLMANN ,  Rene RÖSCHKE ,  Björn JELONNEK ,  Jürgen HELLSTAB

IPC: H04B1/12

Abstract: An apparatus includes an estimation circuitry configured to receive a first set of one or more digital signals of transmitters of a communication system, and capture a set of one or more radio frequency signals that have been generated from the first set of digital signals The set of radio frequency signals being input of an antenna system of the communication system. Based on the first set of digital signals and the corresponding set of radio frequency signals, a set of weights related to a distortion effect caused by the generation of the radio frequency signals is derived. A received second set of digital signals is weighted using the set of weights, resulting in filtered signals. Using the filtered signals, a correction signal indicative of an interference caused by transmission of the second set of digital signals at a receiver of the communication system is estimated.

公开(公告)号：US20210345349A1

公开(公告)日：2021-11-04

申请号：US17236194

申请日：2021-04-21

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Marko FLEISCHER ,  Rene RÖSCHKE ,  Jan HELLMANN

IPC: H04W72/08 ,  H04W72/12 ,  H04W72/04

Abstract: To take into account a passive intermodulation, resource blocks are associated with information indicating passive intermodulation impact of a corresponding resource block. The resource blocks are scheduled using the information.

公开(公告)号：US20240030948A1

公开(公告)日：2024-01-25

申请号：US18223292

申请日：2023-07-18

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Marko FLEISCHER ,  Björn JELONNEK ,  Martin STEIERT ,  Rene RÖSCHKE ,  Jan HELLMANN ,  Dirk SÖNNICHSEN

IPC: H04B1/04 ,  H02J3/01 ,  H02M1/12

CPC classification number: H04B1/0475 ,  H02J3/01 ,  H02M1/12

Abstract: Disclosed is a method comprising transmitting a first signal, obtaining an indication of a harmonic, wherein the harmonic is caused by the transmission of the first signal, determining, based on the indication of the harmonic, an estimation of the harmonic, receiving a second signal, wherein the second signal comprises the harmonic, and subtracting the estimation of the harmonic from the second signal.

公开(公告)号：US20220286153A1

公开(公告)日：2022-09-08

申请号：US17760624

申请日：2019-09-17

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Marko FLEISCHER ,  Helmut HEINZ ,  Jakub JUCHNIEWICZ ,  Rene RÖSCHKE ,  Jan HELLMANN

IPC: H04B1/10 ,  H04B1/00

Abstract: The present subject matter relates to an apparatus for a communication system. The communication system comprises transmitters being configured to operate in multiple transmission frequency bands. The apparatus comprises means being configured for: capturing a set of over-the-air signals at distinct frequency bands of the multiple transmission frequency bands; aligning in time the set of signals using delays between the set of signals and a received signal at a selected receiver of the communication system; combining the set of aligned signals to generate a composite signal; and estimating an interference signal that is caused by the set of signals at the selected receiver by weighting the composite signal using a set of one or more calibrated parameters for the estimation.

公开(公告)号：US20200186103A1

公开(公告)日：2020-06-11

申请号：US16637937

申请日：2017-08-11

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Michael WEBER ,  Bjoern JELONNEK ,  Jan HELLMANN

IPC: H03F1/32 ,  H03F3/24 ,  H04B1/04

Abstract: A method comprises obtaining a transmission signal to be power-amplified in a power amplifier (361) prior to transmission; separating the transmission signal into two or more polyphase components of the transmission signal; feeding one or more polyphase components of the transmission signal comprised in the two or more polyphase components to each of two or more parallel predistortion circuits (320,321,322); selecting a dedicated predistortion model and dedicated predistortion coefficients for each of the two or more parallel predistortion circuits (320,321,322); performing non-linear memory-based modeling on the transmission signal according to the selected dedicated predistortion models and coefficients using the one or more polyphase components; and combining output signals of the two or more parallel predistortion circuits (320,321,322) to form a predistorted transmission signal (y[n]) to be applied to the power amplifier (361).