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公开(公告)号：US10305651B2
公开(公告)日：2019-05-28
申请号：US14875459
申请日：2015-10-05
Applicant: IDAC Holdings, Inc. , University of South Florida
Inventor： Ertugrul Guvenkaya , Rui Yang , Erdem Bala , Huseyin Arslan
Abstract: Systems, methods and instrumentalities are disclosed for superposed signaling for bandwidth efficiency in wireless communications. Homogeneous and heterogeneous signals may be superposed on the same channel. Superposed signals may comprise, for example, multi carrier, frequency division and code division signals, including multiple access, e.g., OFDMA and CDMA, signals. Data for various receivers may be dynamically selected for signal superpositioning, for example, based on radio access technology, communication rate (e.g. high and low rates), distance between transmitter and receiver (e.g. near and far signals). Communication rate and power may be allocated to superposed signals. Interference nulling may be applied, for example, by selecting or excluding spreading codes and/or subcarriers. Nulled locations may be used to transmit critical information. Interference shaping may be applied to modify interference, e.g., by transmitting interference symbols using reserved spreading codes. Support information, e.g., code indices, code length and/or subcarriers, may be signaled to support or optimize performance.
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公开(公告)号：US20180316537A1
公开(公告)日：2018-11-01
申请号：US15769938
申请日：2016-11-02
Applicant: IDAC HOLDINGS, INC.
Inventor： Afshin Haghighat , Erdem Bala , Ananth Kini , Alphan Sahin
CPC classification number: H04L27/2636 , H04L5/0039 , H04L5/0073
Abstract: Techniques may be used to generate a multi-length Zero Tail (ZT) Discrete Fourier Transform-spread Orthogonal Frequency Domain Modulation (DFT-s-OFDM) signal for transmission. A selected allocation of frequency resources may include a plurality of subbands. Subbands may be assigned to wireless transmit/receive units (WTRUs) (i.e., users), and zero head length and zero tail length may be assigned to each of the assigned subbands according to a pattern to combat inter-symbol interference (ISI). The ZT DFT-s OFDM signal may generated for transmission over the assigned subbands in accordance with the assigned zero head length and the assigned zero tail length.
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公开(公告)号：US20170264476A1
公开(公告)日：2017-09-14
申请号：US15609973
申请日：2017-05-31
Applicant: IDAC Holdings, Inc.
Inventor： Rui Yang , Leonid L. Kazakevich , Jialing Li , Erdem Bala , Kenneth Kearney , I-Tai Lu , Juan Fang , Zihao You
CPC classification number: H04L27/2627 , H04L5/0066 , H04L27/0008 , H04L27/2631 , H04L27/264 , H04W72/04
Abstract: A resource block (RB)-based multicarrier modulation (MCM) transmitter and receiver structure for spectral agile systems are disclosed. The transmitter and the receiver are capable of sharing opportunistically available and non-contiguous channels with other users. The RB-MCM partitions the available spectrum, contiguous or non-contiguous, into multiple RBs (same or different sizes), applies a baseband MCM or single carrier modulation, or coded single carrier or multicarrier schemes in each RB with a type of spectral leakage reduction technique, and applies RB modulation for each RB to modulate the signal from baseband to the frequency band of that RB. At the receiver, the received signal may be filtered and RB demodulation may be applied to put each RB signal in baseband and a baseband multicarrier or single carrier or coded single carrier or coded multicarrier demodulation may be applied to each RB signal. Different RBs may use different modulation schemes.
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公开(公告)号：US20240063950A1
公开(公告)日：2024-02-22
申请号：US18377684
申请日：2023-10-06
Applicant: IDAC HOLDINGS, INC.
Inventor： Alphan Sahin , Rui Yang , Erdem Bala , Shahrokh Nayeb Nazar
IPC: H04L1/1607 , H04L5/00 , H04L27/26 , H04W16/14 , H04W72/21
CPC classification number: H04L1/1607 , H04L5/0055 , H04L27/2607 , H04W16/14 , H04L27/2634 , H04W72/21 , H04L5/0048
Abstract: A wireless transmit/receive unit (WTRU) may receive a downlink transmission and send a physical uplink control channel (PUCCH) transmission in each resource block (RB) of an interlace of a plurality of RBs in an active bandwidth part (BWP). A base sequence is mapped to the PUCCH transmission repetitively, once to each RB of the plurality of RBs of the interlace, using a different cyclic shift of the base sequence for each RB. Each different cyclic shift of the base sequence in the PUCCH transmission to each RB is a function of a RB index of the respective RB. The PUCCH transmission indicates either an acknowledgement (ACK) or a negative ACK (NACK) of the received downlink transmission.
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公开(公告)号：US11621817B2
公开(公告)日：2023-04-04
申请号：US16621940
申请日：2018-06-07
Applicant: IDAC Holdings, Inc.
Inventor： Erdem Bala , Moon-Il Lee , Shahrokh Nayeb Nazar
Abstract: A method implemented in a transmitter/transceiver, the method including mapping any number of elements of an uplink control information (UCI) signal sequence (SS) to available subcarriers for transmitting an OFDM symbol for carrying information associated with a Physical Uplink Shared Channel (PUSCH), each of the subcarriers having at least two layers, precoding the mapped elements as a function of the layer of the subcarrier to which the elements are mapped, wherein a first precoding applied to a mapped element of a first layer of a subcarrier is different than a second precoding applied to a mapped element of a second layer of the same subcarrier, feeding the mapped elements of the UCI SS to an IDFT unit and transforming the mapped elements into an IDFT transformed signal that includes the mapped elements of the UCI SS carried by a plurality of resources for transmission.
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Patent Agency Ranking
公开(公告)号：US11563618B2
公开(公告)日：2023-01-24
申请号：US16090570
申请日：2017-03-30
Applicant: IDAC Holdings, Inc.
Inventor： Alphan Sahin , Erdem Bala , Rui Yang , Mihaela C. Beluri , Robert L. Olesen
Abstract: Methods, apparatuses, systems, devices, and computer program products directed to unique word (UW) discrete Fourier transform (DFT) spread and shaped orthogonal frequency division multiplexing (OFDM) (“UW DFT-S-S-OFDM”) based communications are provided. Among new methodologies and/or technologies provided is a method implemented in transmitter and includes any of: transforming a set of data symbols and a UW sequence into a frequency domain (“fDOM”) signal using a DFT; replicating the fDOM signal so as to form a plurality of fDOM signal instances, wherein the plurality of fDOM signal instances is inclusive of the fDOM signal; shaping one or more of the plurality of fDOM signal instances; combining the plurality of fDOM signal instances to form a combined fDOM signal; transforming the combined fDOM signal into a block-based signal using an inverse DFT (IDFT); and outputting the block-based signal.
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公开(公告)号：US11489563B2
公开(公告)日：2022-11-01
申请号：US17022841
申请日：2020-09-16
Applicant: IDAC Holdings, Inc.
Inventor： Shahrokh Nayeb Nazar , Afshin Haghighat , Liangping Ma , Erdem Bala , Oghenekome Oteri , Moon-il Lee , Sanjeewa Herath
IPC: H04B7/06 , H04W72/04 , H04W72/08 , H04B7/0417 , H04B7/0452 , H04B7/0456
Abstract: Methods, apparatus and systems are disclosed. One representative method implemented by a wireless transmit/receive unit includes determining a first beamforming matrix; sending, to a network entity, an indication of the first beamforming matrix; and receiving, from the network entity, an indication of a second beamforming matrix determined by the network entity from at least the first beamforming matrix for beamforming data for transmission.
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公开(公告)号：US20220095228A1
公开(公告)日：2022-03-24
申请号：US17431734
申请日：2020-02-21
Applicant: IDAC Holdings, Inc.
Inventor： Alphan Sahin , Rui Yang , Erdem Bala , Fengjun Xi
Abstract: Systems, methods, and instrumentalities associated with wake-up signals may be provided, e.g., for power saving. The systems, methods, and instrumentalities may include interference-free wake-up signal (WUS)/go-to-sleep signal (GOS) and/or ON/OFF keying (OOK) waveform enhancements. The systems, methods, and instrumentalities for interference-free WUS/GOS may include wake-up control signal format and content and/or user multiplexing and reference symbols for WUS/GOS signaling. The systems, methods, and instrumentalities for OOK waveform enhancements may include one or more of uniform WUS/GUS using time domain masking based OOK, OOK randomization, and/or using orthogonal frequency division multiplexing (OFDM) symbols with multiple subcarrier spacing values for OOK symbols.
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公开(公告)号：US20210067300A1
公开(公告)日：2021-03-04
申请号：US16961223
申请日：2019-01-08
Applicant: IDAC Holdings, Inc.
Inventor： Kyle Jung-Lin Pan , Fengjun Xi , Erdem Bala , Chunxuan Ye
IPC: H04L5/00 , H04L27/26 , H04W24/10 , H04B17/309
Abstract: Systems, methods, and instrumentalities are described herein that may be used for NOMA resource selection. Different types of NOMA resources may be configured by a network and selected by a WTRU based on rules, priorities, fairness, overloading factors, multiple access signature sizes, measurement results, payload sizes, and/or the like. Single-NOMA operations may be performed using DFT-invariant codewords. Multiple NOMA schemes may coexist with different codeword types and/or codeword sizes.
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公开(公告)号：US20210058207A1
公开(公告)日：2021-02-25
申请号：US16764258
申请日：2018-11-14
Applicant: IDAC HOLDINGS, INC.
Inventor： Moon-il Lee , Alphan Sahin , Erdem Bala , Afshin Haghighat , Frank La Sita , Janet A. Stern-Berkowitz
IPC: H04L5/00
Abstract: A system, method, and device for ensuring a number of Phase Tracking Reference Signal(s) (PT-RSs) are the same for multiple slots. A wireless transmit/receive unit (WTRU) may receive control information including a number of scheduled resource blocks (RBs) then determine a PT-RS density based on the number of scheduled RBs. The WTRU may determine a RB offset value for the WTRU based on a WTRU-ID modulo the maximum RB offset value, where the maximum value for the RB offset value may be based on at least one of the number of the scheduled RBs and the PT-RS density. The WTRU may then transmit or receive a signal with PT-RS based on the RB offset value.
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