公开(公告)号：US20240405787A1

公开(公告)日：2024-12-05

申请号：US18619049

申请日：2024-03-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Heping Wan ,  Joonyoung Cho ,  Jianzhong Zhang ,  Soheil Rostami

IPC: H03M13/23 ,  H04L1/00

Abstract: Error-correcting performance of polarization-adjusted convolutional codes is improved by refreezing low weight indices. For information bits (k), where k is a positive integer, a plurality of convolutionally encoded bits (n) are generated by performing a convolutional encoding operation on the plurality of information bits and a plurality of frozen bits (n−k), where n is a positive integer. A refreezing operation is performed on the convolutionally encoded bits, including dynamically assigning zeros to selected frozen indices such that a number of low weight codewords is reduced. Polar encoded bits are generated by performing a polar encoding operation on an output of the refreezing operation, providing polar encoded bits for transmission or storage.

公开(公告)号：US20250158869A1

公开(公告)日：2025-05-15

申请号：US18940696

申请日：2024-11-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Soheil Rostami ,  Joonyoung Cho

IPC: H04L27/26 ,  H04W72/231 ,  H04W72/51

Abstract: An apparatus includes a processor, and a transceiver operatively coupled to the processor. The transceiver is configured to split a set of modulated data symbols, based on a phase change between N consecutive modulated data symbols, to produce Q sets of data symbols, and generate, based on the Q sets of data symbols, Q sets of DFT spread data symbols. The transceiver is further configured to frequency domain spectrum shaping (FDSS) filter each set of the Q sets of DFT spread data symbols, via a different FDSS filter, to produce Q sets of FDSS filtered data symbols, and combine the Q sets of FDSS filtered data symbols. The transceiver is further configured to perform an inverse fast Fourier transform (IFFT) operation on the combined Q sets of FDSS filtered data symbols to produce a FDSS discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) signal, and transmit the FDSS-DFT-s-OFDM signal.

公开(公告)号：US20250126009A1

公开(公告)日：2025-04-17

申请号：US18649887

申请日：2024-04-29

Applicant: Samsung Electronics Co., Ltd.

Inventor： Soheil Rostami ,  Fabrizio Carpi ,  Joonyoung Cho

IPC: H04L27/26

Abstract: Methods and apparatuses for PAPR reduction based on a pulse shaping operation in a wireless communication system. A method of operating a UE includes: converting, using a DFT, a modulated block of data symbols to a first symbol block in a frequency domain; extending, based on a spectral extension ratio associated with extended subcarriers (Nse), the first symbol block to a second symbol block with a length that is identified based on a number of scheduled subcarriers (NSC), wherein the second symbol block is symmetrically extended DFT symbol block; generating, using an FDSS filter with a number of tap values (NP), third symbol block based on the second symbol block that is symmetrically extended DFT symbol block; mapping the generated third symbol block to the NSC; generating, based on the mapped third symbol block, OFDM symbols in a time domain using an IFFT; and transmitting, to a BS, signals including the OFDM symbols.

公开(公告)号：US20250125932A1

公开(公告)日：2025-04-17

申请号：US18791316

申请日：2024-07-31

Applicant: Samsung Electronics Co., Ltd.

Inventor： Soheil Rostami ,  Joonyoung Cho ,  Ravindranath Kanamangala

IPC: H04L5/00 ,  H04L25/03 ,  H04W72/51

Abstract: Methods and apparatuses for signaling pulse shaping in a wireless communication system. A method of BS includes determining a spectral extension index (SEIndex) and a frequency domain spectral shaping type index (FDSSTypeIndex) for at least one transmission time interval (TTI) and transmitting, to a UE, the SEIndex and the FDSSTypeIndex. The method further includes receiving, from the UE, uplink (UL) data based on a spectral extension (SE) ratio associated with the SEIndex and frequency domain spectral shaping (FDSS) values. The FDSS values are associated with the FDSSTypeIndex.

公开(公告)号：US20240422043A1

公开(公告)日：2024-12-19

申请号：US18583806

申请日：2024-02-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Soheil Rostami ,  Joonyoung Cho ,  Heping Wan

IPC: H04L27/26 ,  H04L25/03 ,  H04W8/22

Abstract: Methods and apparatuses for UE initiated reporting in a wireless communication system. A method of operating a UE includes: transmitting UE capability information supporting a FTN; generating data modulation symbols including a set of zero symbols, wherein the data modulation symbols are up-sampled or zero-padded; performing, to obtain DFT output signal, a DFT spread operation on the up-sampled or the zero-padded data modulation symbols; performing, based on a target FTN compression rate and a SC allocation, a discarding or a down sampling operation on the DFT output signal, wherein the discarding or the down sampling operation generates a subset of DFT symbols; mapping the subset of DFT symbols to a set of SCs; and performing an IFFT operation on the subset of DFT symbols to obtain an FTN-DFT-S-OFDM signal including the target FTN compression rate comprising a positive rational number smaller than one.

公开(公告)号：US20240405785A1

公开(公告)日：2024-12-05

申请号：US18619024

申请日：2024-03-27

Applicant: Samsung Electronics Co., Ltd.

Inventor： Heping Wan ,  Joonyoung Cho ,  Jianzhong Zhang ,  Soheil Rostami

IPC: H03M13/13 ,  H04L1/00

Abstract: Error-correcting performance of polar codes is improved by reducing low-weight codewords through partial repetition. A threshold for weights of rows with indices belonging to an information set is obtained in a polar coding generator matrix, and a smallest index of the information set with a weight less than or equal to the threshold is obtained. A first candidate index is selected based on a frozen index that is larger than the smallest index, and a second candidate index is selected based on information indices that are smaller than a largest candidate frozen index and that corresponds to a weight less than or equal to the threshold. Support of the first candidate index is determined to be distinct from support of the second candidate index in at least two elements, based on which at least one bit from the second candidate index is repeated to the first candidate index.