公开(公告)号：US20190097859A1

公开(公告)日：2019-03-28

申请号：US16089246

申请日：2017-03-30

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Alphan Sahin ,  Moon-il Lee ,  Afshin Haghighat ,  Ananth Kini ,  Mihaela C. Beluri ,  Rui Yang ,  Janet A. Stern-Berkowitz ,  Leonid L. Kazakevich

IPC: H04L27/26 ,  H04L25/02

CPC classification number: H04L27/2636 ,  H04L25/0224 ,  H04L27/2613

Abstract: Methods, devices, and systems for transmitting information using a unique word (UW) with discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) are described herein. In an example, a wireless transmit/receive unit (WTRU) may generate a reference sequence. Further, the WTRU may generate a DMRS sequence based on upsampling of the reference sequence. In an example, the DMRS sequence may include a plurality of repeating sequences. Further, in an example, each repeating sequence may include a head sequence, a reference sequences and a tail sequence. Also, a UW sequence within the DMRS may include one of the repeated head sequences and one of the repeated tail sequences. In addition, the WTRU may generate a DMRS signal based on a waveform operation on the DMRS sequence. The WTRU may then transmit the DMRS signal as a reference signal.

公开(公告)号：US11265824B2

公开(公告)日：2022-03-01

申请号：US16097723

申请日：2017-05-11

Applicant: IDAC Holdings, Inc.

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

IPC: H04W52/36 ,  H04L5/00 ,  H04W52/14 ,  H04W52/34 ,  H04W72/04

Abstract: Systems, methods, and instrumentalities are disclosed for non-orthogonal multiple access (NOMA), frequency hopping, and power control. NOMA may be applied to asynchronous and/or grant-free transmissions. Transmissions from multiple WTRUs may be performed using the same resources, and may comprise information for correctly identifying and decoding the transmissions. The transmissions may comprise a built-in deterministic sequence to support timing acquisition at a receiver. The transmissions may be distinguished based on respective transmit power used for the transmissions. Such transmit power may be dynamically controlled by applying a randomly selected power offset. The power control may be performed autonomously by a WTRU.

公开(公告)号：US20190150132A1

公开(公告)日：2019-05-16

申请号：US16300336

申请日：2017-05-11

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Afshin Haghighat ,  Mihaela C. Beluri ,  Rui Yang ,  Ananth Kini ,  Janet A. Stern-Berkowitz ,  Alphan Sahin

IPC: H04W72/04 ,  H04L27/00 ,  H04W72/08

Abstract: A wireless transmit/receive unit (WTRU), using mixed numerologies, may, in a first codeword, map a first set of bits to a higher order modulation scheme and a second set of bits to a lower order scheme, and transmit the first codeword. The WTRU may determine that data of the first codeword is to be re-transmitted on a second codeword, containing the same number of bits as the first codeword. In the second codeword, the WTRU may map a first set of bits to the lower order scheme and a second set of bits to the higher order scheme. The first set of bits of the second codeword may contain the same number of bits as the second set of bits of the first codeword and may contain at least a subset of data in the first set of bits of the first codeword. The WTRU may transmit the second codeword.