公开(公告)号：US20190052500A1

公开(公告)日：2019-02-14

申请号：US16100441

申请日：2018-08-10

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Kwonhue CHOI ,  Dongjun NA

IPC: H04L27/26 ,  H04B1/707 ,  H04L27/34

Abstract: An apparatus and method for filter bank multi-carrier signal modulation with a low peak-to-average power ratio (PAPR) in a multiple antenna system are disclosed. According to embodiments of the present disclosure, in a multiple antenna transmission method, after a plurality of transmission candidate signals, which are modulated for each antenna using discrete Fourier transform (DFT) spread filter bank multi-carrier and offset quadrature amplitude modulation (FBMC/OQAM) techniques and are capable of obtaining a single carrier effect, are generated, a transmission candidate signal with a low PAPR can be selected and transmitted, and thus peak-to-average power ratio performance can be effectively improved, and interference between subcarriers can be eliminated by applying an Alamouti coding manner.

公开(公告)号：US20180248729A1

公开(公告)日：2018-08-30

申请号：US15753061

申请日：2017-03-29

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Kwonhue CHOI

IPC: H04L27/26 ,  H04L1/06

CPC classification number: H04L27/264 ,  H04L1/06 ,  H04L1/0668 ,  H04L25/02 ,  H04L25/03821 ,  H04L27/26

Abstract: An Alamouti coding method includes mapping real number data symbols to a first subcarrier to an (N/2−1)th subcarrier, based on indices of the subcarriers, mapping the mapped real number data symbols and real number data symbols constituting an Alamouti coded symbol pair to an (N/2+1)th subcarrier to an (N−1)th subcarrier, in a frequency inversion scheme with reference to an (N/2)th subcarrier, adjusting a phase of each real number data symbol mapped to the first subcarrier to the (N/2−1)th subcarrier, by using a first phase adjustment value, based on indices of the mapped subcarriers and an index of a time interval, and adjusting a phase of each real number data symbol mapped to the (N/2+1)th subcarrier to the (N−1)th subcarrier, by using a conjugate value of a first phase adjustment value for a corresponding real number data symbol and the real data symbols constituting the Alamouti coded symbol pair.

公开(公告)号：US20200092150A1

公开(公告)日：2020-03-19

申请号：US16548024

申请日：2019-08-22

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Kwonhue CHOI ,  Dongjun NA

IPC: H04L27/26

Abstract: A method for signal modulation in a filter bank multi-carrier system is provided. A modulation method according to one embodiment of the present disclosure includes generating a plurality of different candidate transmission signals by modulating a complex symbol vector including a plurality of complex symbols in a discrete Fourier transform (DFT) spread filter bank multi-carrier (FBMC)/offset quadrature amplitude modulation (OQAM) scheme and selecting a candidate transmission signal having a lowest peak power or peak-to-average power ratio (PAPR) as a transmission signal, wherein the generating of the plurality of candidate transmission signals comprises applying a different phase offset to the complex symbol vector according to a candidate transmission signal to be generated.

公开(公告)号：US20180254936A1

公开(公告)日：2018-09-06

申请号：US15897301

申请日：2018-02-15

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Kwonhue CHOI ,  Dongjun NA

IPC: H04L27/26 ,  H04L27/36 ,  H04L27/34

CPC classification number: H04L27/264 ,  H04L27/2614 ,  H04L27/2636 ,  H04L27/2698 ,  H04L27/3411 ,  H04L27/362

Abstract: A plurality of candidate transmission signals which are modulated according to a discrete Fourier transform (DFT)-spread filter-bank multi-carrier (FBMC)/offset quadrature amplitude modulation (OQAM) scheme and are capable of achieving a single carrier effect are generated. A candidate transmission signal having the smallest peak to average power ratio (PAPR) is selected and transmitted, so that a PAPR performance can be effectively improved.