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：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.