公开(公告)号：US20240414563A1

公开(公告)日：2024-12-12

申请号：US18670031

申请日：2024-05-21

Applicant: University of South Carolina

Inventor： Alphan Sahin

IPC: H04W24/02 ,  G06N3/098

Abstract: Described herein is an over-the-air computation (OAC) scheme for a federated k-means clustering algorithm to reduce the per-round communication latency when implemented over a wireless network. The OAC scheme relies on an encoder exploiting the representation of a number in a balanced number system and computes the sum of the updates for the federated k-means via signal superposition property of wireless multiple-access channels non-coherently to eliminate the need for precise phase and time synchronization.

公开(公告)号：US20210111938A1

公开(公告)日：2021-04-15

申请号：US17064899

申请日：2020-10-07

Applicant: University of South Carolina

Inventor： Alphan Sahin ,  David Matolak ,  Nozhan Hosseini

IPC: H04L27/26 ,  H04B1/707

Abstract: Apparatuses, systems, and methods for transmitting and multiplexing chirp signals for communications are provided. An example apparatus includes an antenna, a radio, and processing circuitry. The radio may be configured to transmit and receive wireless communications via the antenna, and the processing circuitry configured to establish a wireless communications link with a receiving communications device. The signaling transmitted by the antenna via the radio as controlled by the processing circuitry may include a plurality of sequenced chirp signals within an orthogonal frequency division multiplexing (OFDM) framework.

公开(公告)号：US20210111936A1

公开(公告)日：2021-04-15

申请号：US17065949

申请日：2020-10-08

Applicant: University of South Carolina

Inventor： Alphan Sahin ,  David Matolak

IPC: H04L27/26 ,  G06N3/04

Abstract: A new layer tailored for Artificial Intelligence-based communication systems to limit the instantaneous peak power for the signals that relies on manipulation of complementary sequences through neural networks. Disclosed is a method for providing non-linear distortion in end-to-end learning communication systems, the communication system comprising a transmitter and a receiver. The method includes mapping transmitted information bits to an input of a first neural network; controlling, by an output of the neural network, parameters of a complementary sequence (CS) encoder, producing an encoded CS; transmitting the encoded CS through an orthogonal frequency division multiplexing (OFDM) signal; processing, by Discrete Fourier Transform (DFT), the encoded CS, to produce a received information signal in a frequency domain; and processing, by a second neural network, the received information signal.

公开(公告)号：US11570030B2

公开(公告)日：2023-01-31

申请号：US17065949

申请日：2020-10-08

Applicant: University of South Carolina

Inventor： Alphan Sahin ,  David Matolak

IPC: H04L27/26 ,  G06N3/04

Abstract: A new layer tailored for Artificial Intelligence-based communication systems to limit the instantaneous peak power for the signals that relies on manipulation of complementary sequences through neural networks. Disclosed is a method for providing non-linear distortion in end-to-end learning communication systems, the communication system comprising a transmitter and a receiver. The method includes mapping transmitted information bits to an input of a first neural network; controlling, by an output of the neural network, parameters of a complementary sequence (CS) encoder, producing an encoded CS; transmitting the encoded CS through an orthogonal frequency division multiplexing (OFDM) signal; processing, by Discrete Fourier Transform (DFT), the encoded CS, to produce a received information signal in a frequency domain; and processing, by a second neural network, the received information signal.

公开(公告)号：US20220216960A1

公开(公告)日：2022-07-07

申请号：US17562265

申请日：2021-12-27

Applicant: University of South Carolina

Inventor： Alphan Sahin

IPC: H04L5/00

Abstract: A method includes generating, by processing circuitry of a communications device, a partitioned complementary sequence based on information bits for transmission. The partitioned complementary sequence may include zero-valued elements. The method may include encoding a plurality of symbols on a plurality of orthogonal subcarriers using the partitioned complementary sequence. The encoding may include mapping additional information bits on subcarriers associated with the zero-valued elements of the partitioned complementary sequence. Additionally, the method may include controlling a radio of the communications device to transmit the plurality of symbols on the plurality of orthogonal subcarriers via an antenna of the communications device.

公开(公告)号：US10985962B1

公开(公告)日：2021-04-20

申请号：US16931097

申请日：2020-07-16

Applicant: University of South Carolina

Inventor： Alphan Sahin ,  Safi Shams Muhtasimu Hoque

IPC: H04L27/26 ,  H04B1/69

Abstract: A method, performed at a transmitter, for increasing communication link distance and reliability in a communication channel or dual function radar communication system, is provided. The method includes calculating an information sequence, indices of non-zero elements and corresponding values in the sequence indicating information bits to be transmitted; shaping a Discrete Fourier Transform (DFT) of the information sequence by special frequency-domain spectral shaping (FDSS) in the frequency domain to form a frequency-domain representation of chirp signals; mapping the shaped sequence to orthogonal frequency division multiplexing (OFDM) subcarriers; performing an inverse DFT of the mapped shaped sequence to form chirp signals to be transmitted; and transmitting the chirp signals with a cycle prefix (CP).

公开(公告)号：US12003436B2

公开(公告)日：2024-06-04

申请号：US17562265

申请日：2021-12-27

Applicant: University of South Carolina

Inventor： Alphan Sahin

IPC: H04L5/00

CPC classification number: H04L5/0035 ,  H04L5/0007 ,  H04L5/0098

Abstract: A method includes generating, by processing circuitry of a communications device, a partitioned complementary sequence based on information bits for transmission. The partitioned complementary sequence may include zero-valued elements. The method may include encoding a plurality of symbols on a plurality of orthogonal subcarriers using the partitioned complementary sequence. The encoding may include mapping additional information bits on subcarriers associated with the zero-valued elements of the partitioned complementary sequence. Additionally, the method may include controlling a radio of the communications device to transmit the plurality of symbols on the plurality of orthogonal subcarriers via an antenna of the communications device.

公开(公告)号：US11652679B2

公开(公告)日：2023-05-16

申请号：US17064899

申请日：2020-10-07

Applicant: University of South Carolina

Inventor： Alphan Sahin ,  David Matolak ,  Nozhan Hosseini

IPC: H04L27/26 ,  H04B1/707 ,  H04B1/69

CPC classification number: H04L27/2614 ,  H04B1/707 ,  H04L27/2626 ,  H04L27/2636 ,  H04B2001/6912

Abstract: Apparatuses, systems, and methods for transmitting and multiplexing chirp signals for communications are provided. An example apparatus includes an antenna, a radio, and processing circuitry. The radio may be configured to transmit and receive wireless communications via the antenna, and the processing circuitry configured to establish a wireless communications link with a receiving communications device. The signaling transmitted by the antenna via the radio as controlled by the processing circuitry may include a plurality of sequenced chirp signals within an orthogonal frequency division multiplexing (OFDM) framework.