公开(公告)号：US20250168049A1

公开(公告)日：2025-05-22

申请号：US19031195

申请日：2025-01-17

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Alphan SAHIN ,  Rui YANG ,  Erdem BALA

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00 ,  H04W4/70

Abstract: A method for transmitting a discrete fourier transform (DFT) DFT-S-OFDM signal including frequency domain reference symbols is disclosed. The method comprises: determining to null a plurality of data symbols prior to DFT-spreading; performing DFT-spreading including the determined null data symbols; puncturing an interleaved output of the DFT-spreading; inserting reference symbols in a frequency domain of the punctured and interleaved DFT-S-OFDM signal; and transmitting the DFT-S-OFDM signal with inserted reference symbols to a receiver. The transmitted DFT-S-OFDM signal enables the receiver to apply zeros corresponding to the reference symbols to an interleaved input of DFT-despreading, and cancel interference due to the puncturing by using all outputs of the DFT-despreading.

公开(公告)号：US20240007338A1

公开(公告)日：2024-01-04

申请号：US18228469

申请日：2023-07-31

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Alphan SAHIN ,  Rui YANG ,  Erdem BALA

IPC: H04L27/26 ,  H04W4/70 ,  H04L1/00 ,  H04L5/00

CPC classification number: H04L27/2636 ,  H04W4/70 ,  H04L5/0007 ,  H04L1/0071 ,  H04L5/0051 ,  H04L1/0069

Abstract: A method for transmitting a discrete fourier transform (DFT) DFT-S-OFDM signal including frequency domain reference symbols is disclosed. The method comprises: determining to null a plurality of data symbols prior to DFT-spreading; performing DFT-spreading including the determined null data symbols; puncturing an interleaved output of the DFT-spreading; inserting reference symbols in a frequency domain of the punctured and interleaved DFT-S-OFDM signal; and transmitting the DFT-S-OFDM signal with inserted reference symbols to a receiver. The transmitted DFT-S-OFDM signal enables the receiver to apply zeros corresponding to the reference symbols to an interleaved input of DFT-despreading, and cancel interference due to the puncturing by using all outputs of the DFT-despreading.

公开(公告)号：US20230336231A1

公开(公告)日：2023-10-19

申请号：US18208481

申请日：2023-06-12

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Oghenekome OTERI ,  Alphan SAHIN ,  Hanqing LOU ,  Joseph LEVY

IPC: H04B7/06 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0417

CPC classification number: H04B7/0695 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0617 ,  H04B7/0417 ,  H04B7/10

Abstract: Systems and methods are provided to implement features in the IEEE 802. 11ad+/ay protocols by utilizing combinations of analog and digital precoding (such as hybrid mmWave precoding) to enable multi-stream/multi-user transmissions. These systems and methods are also suitable for 5G wireless networks, such as found in 3GPP. These systems and methods address performing general precoder design, reducing of beam-training overhead with leak wave antennas, performing single-stage approximate precoding with enhanced SLS for SU-MIMO transmissions (eSLS1), performing multi-stage approximate precoding with enhanced SLS for SU-MIMO transmissions (eSLS2), and performing exact precoding with enhanced SLS for SU-MIMO transmissions.

公开(公告)号：US20240073914A1

公开(公告)日：2024-02-29

申请号：US18383579

申请日：2023-10-25

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Afshin HAGHIGHAT ,  Oghenekome OTERI ,  Alphan SAHIN ,  Shahrokh NAYEB NAZAR ,  Moon-il LEE ,  Prasanna HERATH MUDIYANSELAGE

IPC: H04W72/23 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04W72/23 ,  H04B7/0456 ,  H04B7/0628

Abstract: Methods, apparatuses, systems, devices, and computer program products directed to phase-continuous frequency selective precoding are provided. Included among these classes are methods for use in connection with dynamic precoding resource block group (PRG) configuration and with codebook based transmission configuration. A representative of such methods may include any of receiving signaling indicating transmit precoding information; determining a candidate PRG size using any of the transmit precoding information, a rule for determining a PRG size and configured PRG sizes; and configuring or reconfiguring a wireless transmit/receive device in accordance with the candidate PRG size. Another of the representative methods may include reporting a transmission coherence capability of a wireless transmit/receive unit; receiving a codebook subset restriction (CBSR) commensurate with the transmission coherence capability; determining a transmit precoding matrix indices (TPMI) size based on the CBSR; receiving a TPMI; and detecting or decoding the TPMI based on the determined TPMI size.

公开(公告)号：US20180139081A1

公开(公告)日：2018-05-17

申请号：US15572691

申请日：2016-05-06

Applicant: INTERDIGITAL PATENT HOLDINGS, INC. ,  University of South Florida

Inventor： Ertugrul GUVENKAYA ,  Erdem BALA ,  Rui YANG ,  Huseyin ARSLAN ,  Alphan SAHIN ,  Anas TOM

IPC: H04L27/26

CPC classification number: H04L27/2607 ,  H04L25/03828 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2618 ,  H04L2027/0087

Abstract: A wireless transmit/receive unit (WTRU) may combine an alignment component with an FDM based symbol to produce a signal such that it is aligned to a duration of a CP of the FDM based symbol at a receiver upon reception. A component may be added to one or more subcarriers of the alignment signal to reduce peak-to-average ratio (PAPR) of the signal.