公开(公告)号：US20220094583A1

公开(公告)日：2022-03-24

申请号：US17419322

申请日：2019-12-31

Applicant: IDAC HOLDINGS, INC.

Inventor： Alphan Sahin ,  Moon-il Lee ,  Rui Yang

IPC: H04L27/26 ,  H04J13/14

Abstract: A WTRU may comprise circuitry configured to determine DMRS sequences of length 12, 18 and 24 for PI/2 BPSK DFT-s-OFDM modulation. The sequences are optimized for PAPR, CM, frequency flatness, cross-correlation and for channel estimation (cyclic correlation).

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.

公开(公告)号：US10924229B2

公开(公告)日：2021-02-16

申请号：US16088075

申请日：2017-03-29

Applicant: IDAC Holdings, Inc.

Inventor： Fengjun Xi ,  Steven Ferrante ,  Kyle Jung-Lin Pan ,  Alphan Sahin ,  Chunxuan Ye ,  Robert L. Olesen

IPC: H04L5/00 ,  H04B7/0456 ,  H04B7/10 ,  H04L1/00

Abstract: Systems and methods related to increased spectrum efficiency for 5G communications, comprising combining time, frequency, spatial, and signal domains for multi-dimension modulation. In one embodiment, the ability of reconfigurable antenna to change their radiation pattern and/or polarization modes may be used to modulate additional information onto the conventional SM-MIMO transmitted signal. In further embodiments, various combinations of space shift keying, block coding, multi-carrier modulation, and the like may be used to introduce additional dimensions for data modulation and achieve diversity gain.

公开(公告)号：US20200275416A1

公开(公告)日：2020-08-27

申请号：US16477087

申请日：2018-01-13

Applicant: IDAC Holdings, Inc.

Inventor： Afshin Haghighat ,  Oghenekome Oteri ,  Alphan Sahin ,  Shahrokh Nayeb Nazar ,  Moon-il Lee ,  Prasanna Herath Mudiyanselage

IPC: H04W72/04 ,  H04B7/0456 ,  H04B7/06

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 CB SR; receiving a TPMI; and detecting or decoding the TPMI based on the determined TPMI size.

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：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：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.