Convolutional code rate matching method and wireless communication apparatus

    公开(公告)号:US11876538B2

    公开(公告)日:2024-01-16

    申请号:US17856773

    申请日:2022-07-01

    CPC classification number: H03M13/6362 H03M13/235 H03M13/6356 H04L1/0069

    Abstract: A convolutional code rate matching method and a communication apparatus are provided. A puncturing pattern of a second codeword at a second code rate is obtained based on a puncturing pattern of a first codeword at a first code rate. A second puncturing location set of the second codeword is a subset of a first puncturing location set of the first codeword. When a transmit device decreases a code rate from the first code rate to the second code rate, a redundant bit is sent at a location of a complementary set of the second puncturing location set relative to the first puncturing location set. Compared with the first puncturing location set, the second puncturing location set may obtain more incremental redundant bits, to decrease a channel encoding rate. This can improve decoding performance of a convolutional code.

    Frame transmission method for wireless local area network and wireless local area network apparatus

    公开(公告)号:US10390260B2

    公开(公告)日:2019-08-20

    申请号:US15472887

    申请日:2017-03-29

    Abstract: Embodiments of the present invention disclose a frame transmission method for a wireless local area network and a wireless local area network apparatus, and relate to the field of communications technologies. According to the present invention, in a frame transmission process in a WLAN, a frame sent by a wireless local area network WLAN apparatus is received, and the frame of a particular standard is recognized by detecting a user common signal field included in the frame, so that backward compatibility of a WLAN apparatus is implemented, and hybrid networking of WLAN apparatuses of different standards can be supported, thereby improving flexibility of network deployment, and reducing complexity of networking.

    Signal processing method, apparatus, and system

    公开(公告)号:US10225311B2

    公开(公告)日:2019-03-05

    申请号:US15098141

    申请日:2016-04-13

    Abstract: Embodiments of the present disclosure provide a signal processing method, an apparatus, and a system. The signal processing method includes acquiring a phase of each of transmit antennas when the lth OFDM data symbol is sent, and acquiring a phase of each of receive antennas when the lth OFDM data symbol is received. The method further includes compensating received signals of each of the receive antennas according to the phase of each of the transmit antennas when the lth OFDM data symbol is sent and the phase of each of the receive antennas when the lth OFDM data symbol is received, to obtain compensated signals of each receive antenna.

    Method and Apparatus for Quadrature Signal Modulation

    公开(公告)号:US20170288935A1

    公开(公告)日:2017-10-05

    申请号:US15095787

    申请日:2016-04-11

    CPC classification number: H04L27/36 H04B1/02

    Abstract: Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A mapping module electronic component of a wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences. Specific signal constellations are disclosed. The signal constellations may be obtained through an optimization procedure which accounts for both phase noise and power amplifier nonlinearity.

    Modulation method and apparatus
    6.
    发明授权

    公开(公告)号:US12137021B2

    公开(公告)日:2024-11-05

    申请号:US17961709

    申请日:2022-10-07

    Abstract: A modulation method, including: modulating data by using a non-uniform constellation; and sending the modulated data. When the non-uniform constellation provided in embodiments of this application is used, for each noise standard deviation, a BER of the non-uniform constellation provided in embodiments of this application is lower than a BER of an existing QAM constellation.

    Low density parity check code encoding method and communication apparatus

    公开(公告)号:US12218687B2

    公开(公告)日:2025-02-04

    申请号:US18523495

    申请日:2023-11-29

    Abstract: This application provides an LDPC code encoding method and a communication apparatus, to meet a requirement of increasing redundant bits through retransmission in an IR-HARQ mechanism, so as to decrease a channel coding rate, and improve decoding performance of an LDPC code. In the method, a check matrix of the LDPC code is used as a basic matrix, and the basic matrix is extended to obtain a mother matrix compatible with a plurality of code rates. During LDPC encoding, a transmit device reads, from the mother matrix, a check matrix corresponding to a required code rate, and performs LDPC encoding on an information bit sequence based on the read check matrix. LDPC encoding is performed on the information bit sequence by using check matrices of different sizes, to obtain different quantities of redundant bits.

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