公开(公告)号：US20240364567A1

公开(公告)日：2024-10-31

申请号：US18683897

申请日：2021-08-18

Applicant: Nokia Technologies Oy

Inventor： Markku RENFORS ,  Ismael PERUGA NASARRE ,  Toni Aleksi LEVANEN ,  Juha YLI-KAAKINEN ,  Mikko VALKAMA

IPC: H04L27/20 ,  H04L27/26

CPC classification number: H04L27/2007 ,  H04L27/2636

Abstract: This document discloses a solution for modulating and demodulating signals transferred over a communication channel. According to an aspect, a method comprises: storing a database for mapping rules for mapping a block of N bits into M modulation symbol phase transitions, wherein a phase transition between consecutive modulation symbols is limited to less than or equal to ∓π/2, wherein M is smaller than N, and wherein M is the smallest number required for realizing 2N different phase-transition combinations; determining an initial phase; acquiring a block of N bits and modulating the block of N bits into M phase symbol transitions from the initial phase by using bit values of the block of N bits and the mapping rules, thus acquiring M modulation symbols; performing said determining, acquiring, and modulating for further blocks of N bits, thus acquiring a sequence of K modulation symbols; allocating the sequence of K modulation symbols to sub-carriers of a multi-carrier symbol and causing transmission of the multi-carrier symbol over a radio interface.

公开(公告)号：US20190280818A1

公开(公告)日：2019-09-12

申请号：US16295631

申请日：2019-03-07

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Markku RENFORS ,  Juha YLI-KAAKINEN ,  Toni LEVANEN

IPC: H04L1/00 ,  H04L5/00 ,  H04L27/26

Abstract: According to an aspect, there is provided a waveform processing device. Said waveform processing device comprises means for performing the following. Upon receiving one or more input signals, each of which corresponds to a different subband, the waveform processing device segments each of the one or more input signals to a subband-specific set of parallel signal blocks. Then, the waveform processing device filters each subband-specific set by applying at least a first time window function, a transform-plane window function and a second time window function in this order. Finally, the waveform processing device concatenates filtered signals to an output signal.

公开(公告)号：US20240372770A1

公开(公告)日：2024-11-07

申请号：US18254723

申请日：2021-11-19

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Ismael PERUGA ,  Toni LEVANEN ,  Mikko VALKAMA ,  Markku RENFORS

IPC: H04L27/26 ,  H04L5/00

Abstract: Disclosed is a method for compensating phase noise. A symbol comprising one or more data sub-symbols and one or more pilot sub-symbols is received (501). A sequence of first phase noise estimates is obtained (502) based at least partly on the one or more pilot sub-symbols. A first filter is used to obtain (503, 507) a first sequence of filtered phase noise estimates from at least a subset of the one or more data sub-symbols based at least partly on the sequence of first phase noise estimates. The first sequence of filtered phase noise estimates is stored (506, 510). Phase noise compensation is applied (512) to the one or more data sub-symbols based at least partly on the first sequence of filtered phase noise estimates.