公开(公告)号：US10826573B2

公开(公告)日：2020-11-03

申请号：US16323157

申请日：2017-08-03

Applicant: IDAC Holdings, Inc.

Inventor： Shahrokh Nayeb Nazar ,  Afshin Haghighat ,  Liangping Ma ,  Erdem Bala ,  Oghenekome Oteri ,  Moon-il Lee ,  Sanjeewa Herath

IPC: H04B7/0417 ,  H04B7/06 ,  H04B7/0452 ,  H04B7/0456 ,  H04W72/04 ,  H04W72/08

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.

公开(公告)号：US20200244503A1

公开(公告)日：2020-07-30

申请号：US16495253

申请日：2018-03-22

Applicant: IDAC Holdings, Inc.

Inventor： Erdem Bala ,  Moon-il Lee ,  Afshin Haghighat ,  Alphan Sahin ,  Rui Yang ,  Frank La Sita

IPC: H04L27/26 ,  H04L5/00 ,  H04W72/04

Abstract: Methods, apparatus, systems, architectures and interfaces for reference signal (RS) configuration, generation, and/or transmission in a transmitter/receiver. The method includes receiving information indicating any of at least first and second modes of operation for transmitting a discrete Fourier transform (DFT)-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) symbol including a reference signal (RS), and transmitting the DFT-s-OFDM symbol including: (1) the RS and data tones, on condition that the information indicates the first mode; or (2) the RS and null tones, on condition that the information indicates the second mode, wherein the DFT-s-OFDM symbol is divided into a number of segments, each including a chunk of RS tones, and wherein any of a size or a location of the chunk is determined according to any of the first or second modes.

公开(公告)号：US20200213057A1

公开(公告)日：2020-07-02

申请号：US16621940

申请日：2018-06-07

Applicant: IDAC Holdings, Inc.

Inventor： Erdem Bala ,  Moon-il Lee ,  Shahrokh Nayeb Nazar

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/00 ,  H04L27/26

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.

公开(公告)号：US20200052947A1

公开(公告)日：2020-02-13

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

IPC: H04L27/26 ,  H04W72/04

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 that may be implemented in transmitter and that may include 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.

公开(公告)号：US20190222455A1

公开(公告)日：2019-07-18

申请号：US16324408

申请日：2017-08-10

Applicant: IDAC HOLDINGS, INC.

Inventor： Alphan Sahin ,  Rui Yang ,  Erdem Bala

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

CPC classification number: H04L27/2636 ,  H04L1/0069 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0051 ,  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：US20190199569A1

公开(公告)日：2019-06-27

申请号：US16292991

申请日：2019-03-05

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan ,  Tao Deng ,  Liangping Ma ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Alphan Sahin

IPC: H04L27/26

CPC classification number: H04L27/2627 ,  H04L27/2605

Abstract: Methods and systems for operation in a wireless network are provided, the methods including receiving modulated data symbols and zeros in a frequency-domain, and mapping in the frequency-domain the modulated data symbols and zeros in an interleaved manner to sub-carriers within a resource allocation. The methods and systems further include generating a time-domain data signal based on the mapped sub-carriers, and generating a time domain cancellation signal by sign inverting and repeating a predetermined number of time-domain samples at a tail portion of the data signal. The methods and systems further include combining the time-domain data signal and the time domain cancellation signal to generate an exact zero tail data signal such that the exact zero tail data signal has a zero tail length equal to the predetermined number of time-domain samples, and transmitting the exact zero tail data signal.

公开(公告)号：US20190174472A1

公开(公告)日：2019-06-06

申请号：US16324007

申请日：2017-08-10

Applicant: IDAC HOLDINGS, INC.

Inventor： Moon-il Lee ,  Afshin Haghighat ,  Erdem Bala ,  Janet A. Stern-Berkowitz ,  Mihaela C. Beluri ,  Ananth Kini

IPC: H04W72/04 ,  H04L1/18

Abstract: Methods, apparatuses and systems are provided for grant-less (GL) uplink transmissions. A wireless transmit/receive unit (WTRU) may receive a configuration of a set of GL Physical Uplink Shared Channel (GL-PUSCH) frequency resources. The WTRU may monitor for a downlink control information (DCI) message, wherein the DCI message includes an indication of a presence of at least a subset of the set of GL-PUSCH frequency resources. If the WTRU successfully receives the DCI message, the WTRU may select one or more GL-PUSCH frequency resources from the subset of the set of GL-PUSCH frequency resources and may select a time period. The WTRU may transmit data on a GL-PUSCH using the selected GL-PUSCH frequency resources during the selected time period. The WTRU may also monitor for hybrid automatic repeat request acknowledgement (HARQ-ACK) based on the selected GL-PUSCH frequency resources. The WTRU may monitor for the DCI during a fixed time window.

公开(公告)号：US20180375707A1

公开(公告)日：2018-12-27

申请号：US15777761

申请日：2016-11-30

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan ,  Tao Deng ,  Liangping Ma ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Alphan Sahin

IPC: H04L27/26

Abstract: Methods and systems for operation in a wireless network are provided, the method including receiving modulated data symbols and zeros in a frequency-domain, and mapping in the frequency-domain the modulated data symbols and zeros in an interleaved manner to sub-carriers within a resource allocation. The method further includes generating a time-domain data signal based on the mapped sub-carriers, and generating a time domain cancellation signal by sign inverting and repeating a predetermined number of time-domain samples at a tail portion of the data signal. The method further includes combining the time-domain data signal and the time domain cancellation signal to generate an exact zero tail data signal such that the exact zero tail data signal has a zero tail length equal to the predetermined number of time-domain samples, and transmitting the exact zero tail data signal.

公开(公告)号：US09692629B2

公开(公告)日：2017-06-27

申请号：US14648160

申请日：2013-11-27

Applicant: IDAC HOLDINGS, INC.

Inventor： Rui Yang ,  Leonid L. Kazakevich ,  Jialing Li ,  Erdem Bala ,  Kenneth Kearney ,  I-Tai Lu ,  Juan Fang ,  Zihao You

IPC: H04L27/26 ,  H04L5/00 ,  H04L27/00 ,  H04W72/04

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.

公开(公告)号：US11671301B2

公开(公告)日：2023-06-06

申请号：US16495253

申请日：2018-03-22

Applicant: IDAC Holdings, Inc.

Inventor： Erdem Bala ,  Moon-il Lee ,  Afshin Haghighat ,  Alphan Sahin ,  Rui Yang ,  Frank La Sita

IPC: H04L27/26 ,  H04W72/04 ,  H04L5/00 ,  H04W72/044

CPC classification number: H04L27/2636 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0048 ,  H04L27/2613 ,  H04W72/044

Abstract: Methods, apparatus, systems, architectures and interfaces for reference signal (RS) configuration, generation, and/or transmission in a transmitter/receiver. The method includes receiving information indicating any of at least first and second modes of operation for transmitting a discrete Fourier transform (DFT)-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) symbol including a reference signal (RS), and transmitting the DFT-s-OFDM symbol including: (1) the RS and data tones, on condition that the information indicates the first mode; or (2) the RS and null tones, on condition that the information indicates the second mode, wherein the DFT-s-OFDM symbol is divided into a number of segments, each including a chunk of RS tones, and wherein any of a size or a location of the chunk is determined according to any of the first or second modes.