公开(公告)号：US20210099330A1

公开(公告)日：2021-04-01

申请号：US16585553

申请日：2019-09-27

申请人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA

发明人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA

IPC分类号： H04L27/26 ,  H04L25/03

摘要： A system and method are provided for processing symbols for transmission. A set of 2K outputs is produced that includes K real components and K imaginary components from K complex symbols. A Fourier transform operation on the 2K outputs produces 2K Fourier transform outputs. Transmit pulse shaping is applied to the 2K Fourier transform outputs. The transmit pulse shape may be Nyquist or non-Nyquist. An inverse Fourier transform operation on the J pulse shaped outputs produces an inverse Fourier transform output. In the receiver, equalization is performed to remove the effect of both the channel and the transmit pulse shape. Nyquist pulse shaping is performed by applying a Nyquist pulse shape prior to converting back to time domain. The approach avoids self-interference, even in situations where the transmit pulse shape is non-Nyquist. The transmitter is free to select a pulse shape to optimize PAPR without being concerned with interference.

公开(公告)号：US20220109538A1

公开(公告)日：2022-04-07

申请号：US17064098

申请日：2020-10-06

申请人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

发明人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

IPC分类号： H04L5/00 ,  H04L25/02 ,  H04L27/10

摘要： A reference signaling scheme is provided that is based on the use of a Zadoff Chu sequence with cyclic repetition, optionally code division multiplexing precoding, together with frequency domain spectral shaping (FDSS). A specific pulse shape design for the FDSS part of the reference signal scheme in some embodiments involves the use of a raised cosine pulse raised to the power of β. The new solution for generating reference signals has a Low peak average power ratio that matches the PAPR of SC-OQAM, good channel estimation performance, and the ability to implement CDM in the frequency domain to increase multiplexing gain.

公开(公告)号：US20210243065A1

公开(公告)日：2021-08-05

申请号：US16782453

申请日：2020-02-05

申请人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA

发明人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA

IPC分类号： H04L27/36 ,  H04L27/26

摘要： Aspects of the present application provide methods and devices for time domain implementation of a single carrier waveform such as single carrier quadrature amplitude modulation (QAM) DFT-s-OFDM and single carrier Offset QAM (OQAM). A time domain implementation allows flexible symbol lengths, lower implementation complexity as a large IDFT operation is not required in the time domain and support for variable cyclic prefix (CP) length. An OQAM implementation utilizes a pre-processing step to convert a K complex QAM symbol sequence into a 2K OQAM symbol sequence and generates a sequence for transmission in the time domain as opposed to the frequency domain.

公开(公告)号：US20230318775A1

公开(公告)日：2023-10-05

申请号：US18324239

申请日：2023-05-26

申请人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

发明人： NUWAN SURESH FERDINAND ,  MING JIA ,  JIANGLEI MA ,  JAVAD ABDOLI

IPC分类号： H04L5/00 ,  H04L27/10 ,  H04L25/02

CPC分类号： H04L5/0048 ,  H04L25/0202 ,  H04L27/10

摘要： A reference signaling scheme is provided that is based on the use of a Zadoff Chu sequence with cyclic repetition, optionally code division multiplexing precoding, together with frequency domain spectral shaping (FDSS). A specific pulse shape design for the FDSS part of the reference signal scheme in some embodiments involves the use of a raised cosine pulse raised to the power of β. The new solution for generating reference signals has a Low peak average power ratio that matches the PAPR of SC-OQAM, good channel estimation performance, and the ability to implement CDM in the frequency domain to increase multiplexing gain.

公开(公告)号：US20210176108A1

公开(公告)日：2021-06-10

申请号：US17181047

申请日：2021-02-22

申请人： NUWAN SURESH FERDINAND ,  MING JIA

发明人： NUWAN SURESH FERDINAND ,  MING JIA

IPC分类号： H04L27/26 ,  H04L27/34 ,  H04L5/00

摘要： A system and method are provided for processing symbols for transmission. The method involves producing a single carrier offset quadrature amplitude modulation (OQAM) waveform signal from a set of K complex symbols. The method further involves pulse shaping 2K frequency domain samples of the OQAM waveform signal with J non-zero coefficients, where the J non-zero coefficients represent a frequency response of a conjugate symmetrical pulse shape, and K≤J≤2K−1. The approach has the advantage of avoiding self-interference, with the result that better BLER performance may be possible. The approach is applicable to any modulation order and also avoids bandwidth expansion. Flexibility is provided through a trade-off between PAPR vs. spectrum efficiency.

公开(公告)号：US20210075661A1

公开(公告)日：2021-03-11

申请号：US16567122

申请日：2019-09-11

申请人： NUWAN SURESH FERDINAND ,  MING JIA

发明人： NUWAN SURESH FERDINAND ,  MING JIA

IPC分类号： H04L27/26 ,  H04L27/34 ,  H04L5/00

摘要： A system and method are provided for processing symbols for transmission. The method involves producing a set of 2K outputs that include K real components and K imaginary components from K complex symbols, performing a Fourier transform operation on the 2K outputs to produce 2K Fourier transform outputs, pulse shaping the 2K Fourier transform outputs by multiplying each of J of the 2K Fourier transform outputs with a respective one of J non-zero coefficients, where J is odd, and K≤J≤2K−1, performing an inverse Fourier transform operation on the J pulse shaped outputs to produce an inverse Fourier transform output; and outputting the inverse Fourier transform output. The approach has the advantage of avoiding self-interference, with the result that better BLER performance may be possible. The approach is applicable to any modulation order without bandwidth expansion. Flexibility is provided through a trade-off between PAPR vs. spectrum efficiency.

公开(公告)号：US20210344546A1

公开(公告)日：2021-11-04

申请号：US17209430

申请日：2021-03-23

申请人： MING JIA ,  JIANGLEI MA

发明人： MING JIA ,  JIANGLEI MA

IPC分类号： H04L27/26 ,  H04L25/03 ,  H04L1/00 ,  H04B1/715

摘要： A system and method of DFT-S-OFDM modulation is provided that uses a set of frequency domain patterns. For a given transmitter, for a set of DFT-S-OFDM symbols, the frequency domain pattern changes according to a time domain hopping pattern. Advantageously, the time domain hopping patterns are defined to allow only a certain amount of overlap, for example for only one DFT-S-OFDM symbol, between any two time domain hopping patterns. This functions to reduce the effect of a collision, when two transmitters use the same frequency pattern, they will do so only for part of the overall transmission. Optionally, frequency domain spectral spreading is used in the transmitter. This can further reduce the PAPR. In the receiver, successive interference cancellation may be employed to reduce the effect of colliding transmissions.

公开(公告)号：US20240340075A1

公开(公告)日：2024-10-10

申请号：US18626560

申请日：2024-04-04

申请人： JIANGLEI MA ,  MING JIA ,  PEIYING ZHU ,  WEN TONG

发明人： JIANGLEI MA ,  MING JIA ,  PEIYING ZHU ,  WEN TONG

IPC分类号： H04B7/185

CPC分类号： H04B7/18513 ,  H04B7/18517 ,  H04B7/18526 ,  H04B7/18539 ,  H04B7/18558

摘要： The present disclosure relates, in part, to non-terrestrial communication systems, and in some embodiments to the integration of terrestrial and non-terrestrial communication systems. Non-terrestrial communication systems can provide a more flexible communication system with extended wireless coverage range and enhanced service quality compared to conventional communication systems.

公开(公告)号：US20210160907A1

公开(公告)日：2021-05-27

申请号：US17077464

申请日：2020-10-22

申请人： YONGXIA LYU ,  JIANGLEI MA ,  MING JIA ,  LIQING ZHANG ,  PEIYING ZHU

发明人： YONGXIA LYU ,  JIANGLEI MA ,  MING JIA ,  LIQING ZHANG ,  PEIYING ZHU

IPC分类号： H04W72/12 ,  H04W72/14 ,  H04L27/26 ,  H04W80/02 ,  H04W76/27 ,  H04W72/04

摘要： Current frame structures in Long-Term Evolution (LTE) and New Radio (NR) place some restrictions on the symbols transmitted in the frame, e.g. restrictions related to the duration of each symbol. Embodiments are disclosed in which multi-carrier symbols and/or single-carrier symbol blocks have configurable parameters, such as configurable length and/or configurable location, thereby allowing for more flexibility in the scheduling and transmission of the symbols and/or symbol blocks. Some embodiments aim to implement the configurable parameters in a way that tries to reduce signaling overhead.

公开(公告)号：US20190158338A1

公开(公告)日：2019-05-23

申请号：US15821809

申请日：2017-11-23

申请人： SANJEEWA HERATH ,  ALIREZA BAYESTEH ,  MING JIA ,  JIANGLEI MA ,  PEIYING ZHU ,  WEN TONG

发明人： SANJEEWA HERATH ,  ALIREZA BAYESTEH ,  MING JIA ,  JIANGLEI MA ,  PEIYING ZHU ,  WEN TONG

IPC分类号： H04L27/34 ,  H04W72/04

摘要： Methods and systems are disclosed for symbol sequence generation and transmission for non-orthogonal multiple access (NoMA) transmission. A NoMA signal may be generated based on: (1) a first symbol sequence, the first symbol sequence determined from a set of input bits and associated with a first MA signature within a first MA signature space; (2) a second symbol sequence determined based on the first symbol sequence, the second symbol sequence being associated with a second MA signature within a second MA signature space; and (3) a symbol-to-resource element mapping applied to the second symbol sequence to produce the NoMA signal.