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    PROBABILISTIC AMPLITUDE SHAPING APPLIED TO PAPR REDUCTION
    1.
    发明公开
    PROBABILISTIC AMPLITUDE SHAPING APPLIED TO PAPR REDUCTION 审中-公开

    公开(公告)号：US20240340209A1

    公开(公告)日：2024-10-10

    申请号：US18695251

    申请日：2021-09-30

    申请人： Nokia Technologies Oy

    发明人： Mohamad SAYED HASSAN ,  Khodor SAFA ,  Fanny JARDEL

    IPC分类号： H04L27/26 ,  H04L27/18 ,  H04L27/34

    CPC分类号： H04L27/2615 ,  H04L27/183 ,  H04L27/2636 ,  H04L27/3411

    摘要： According to an example aspect of the present disclosure, there is provided an apparatus comprising memory configured to store a set of probabilities of transitions between modulation symbols, the set of probabilities corresponding to a lower peak-to-average power ratio than a set of equal probabilities of transitions between modulation symbols, distribution matcher circuitry configured to process an input bit sequence into a symbol sequence, wherein frequencies of transitions between symbols in the symbol sequence conform to probabilities in the set of probabilities, a channel coder configured to generate parity bits of unity and negative unity from bit information obtained from the symbol sequence, grouping circuitry configured to assign symbols of the symbol sequence into groups each comprising two or more symbols, and multiplication circuitry configured to multiply each one of the groups with a corresponding one of the parity bits.

    DCM-COFDM Signaling Using Square NU-QAM Symbol Constellations with Labeling Diversity
    2.
    发明公开
    DCM-COFDM Signaling Using Square NU-QAM Symbol Constellations with Labeling Diversity 审中-公开

    公开(公告)号：US20240048432A1

    公开(公告)日：2024-02-08

    申请号：US17881483

    申请日：2022-08-04

    申请人： Allen LeRoy Limberg

    发明人： Allen LeRoy Limberg

    IPC分类号： H04L27/34 ,  H04L27/26 ,  H04L1/00 ,  H04L5/00

    CPC分类号： H04L27/3411 ,  H04L27/2614 ,  H04L27/2697 ,  H04L1/0048 ,  H04L5/0048 ,  H04L1/0075

    摘要： The superposition coding modulation (SCM) of dual-carrier modulation (DCM) in a coded orthogonal frequency-division multiplexed (COFDM) signal using non-uniform quadrature amplitude modulation (NU-QAM) of its carrier waves employs labeling diversity to reduce its peak-to-average-power ratio (PAPR). The number of lattice points in the square NU-QAM symbol constellations is squared to compensate against the halving of data throughput attributable to DCM. Bits of square Nu-QAM symbol constellations more likely to be in error owing to additive-white-Gaussian-noise (AWGN) in the lattice-point labels (LPLs) of each of the DCM signals correspond to bits less likely to be in error owing to AWGN in the LPLs of the other of the DCM signals. The non-uniform spacing of lattice points in the square NU-QAM symbol constellations reduces the likelihood of error in the bits least likely to be in error caused by AWGN.

    Systems and methods for transmitting control data in a communication network
    3.
    发明授权
    Systems and methods for transmitting control data in a communication network 有权

    公开(公告)号：US11894955B2

    公开(公告)日：2024-02-06

    申请号：US17522509

    申请日：2021-11-09

    申请人： WISIG NETWORKS PRIVATE LIMITED

    发明人： Kiran Kumar Kuchi ,  Sibgath Ali Khan Makandar

    IPC分类号： H04L25/03 ,  H04L5/00 ,  H04L27/26 ,  H04L27/34

    CPC分类号： H04L25/03343 ,  H04L5/0007 ,  H04L5/0055 ,  H04L27/2607 ,  H04L27/3411

    摘要： Embodiments of the present disclosure relate to a method and system for transmitting a sequence with low peak-to-average-power-ratio (PAPR). A communication system receives control data. A transmitter of the communication system comprises a plurality of sequences which are associated with the control data in the transmitter. The transmitter selects a sequence from the plurality of sequence. The selected sequence is rotated, pre-coded for generating pre-coded sequence. DFT is applied on the pre-coded sequence for generating frequency domain signals. The frequency domain signals are processed and corresponding waveform is transmitted to a receiver of the communication system. The receiver receives the waveform and is processed to extract the sequence from the waveform. The receiver correlates the extracted sequence with plurality of sequences stored in receiver memory to detect the control data. The generated waveform has low PAPR.

    Non-zero insertion based modulation scheme for low peak average power ratio
    5.
    发明授权
    Non-zero insertion based modulation scheme for low peak average power ratio 有权

    公开(公告)号：US11677604B2

    公开(公告)日：2023-06-13

    申请号：US17838091

    申请日：2022-06-10

    申请人： ZTE Corporation

    发明人： Yu Xin ,  Guanghui Yu ,  Jian Hua ,  Jin Xu ,  Jun Xu

    IPC分类号： H04L27/26 ,  H04L27/34

    CPC分类号： H04L27/2615 ,  H04L27/2621 ,  H04L27/2631 ,  H04L27/3411

    摘要： Methods, apparatus, and systems for reducing Peak Average Power Ratio (PAPR) in signal transmissions are described. In one example aspect, a wireless communication method includes determining, for an input sequence, an output sequence corresponding to an output of a convolutional modulation between a plurality of values and an intermediate sequence. The intermediate sequence is generated by inserting a set of coefficients between coefficients of the input sequence. Each non-zero coefficient of the set of coefficients is inserted between a first adjacent coefficient and a second adjacent coefficient. Each non-zero coefficient has a power that is between a first power of the first adjacent coefficient and a second power of the second adjacent coefficient and a phase value between a first phase value of the first adjacent coefficient and a second phase value of the second adjacent coefficient. The method also includes generating a waveform using the output sequence.