Communication apparatus and communication method

    公开(公告)号:US12132540B2

    公开(公告)日:2024-10-29

    申请号:US18343620

    申请日:2023-06-28

    摘要: Provided are M signal processors that respectively generate modulated signals for M reception apparatuses (where M is an integer equal to 2 or greater), a multiplexing signal processor, and N antenna sections (where N is an integer equal to 1 or greater). When transmitting multiple streams, each of the M signal processors generates two mapped signals, generates first and second precoded signals by precoding the two mapped signals, periodically changes the phase of signal points in the IQ plane with respect to the second precoded signal, outputs the phase-changed signal, and outputs the first precoded signal and the phase-changed second precoded signal as two modulated signals. When transmitting a single stream, each of the M signal processor outputs a single modulated signal. The multiplexing signal processor multiplexes the modulated signals output from the M signal processors, and generates N multiplexed signals. The N antenna sections respectively transmit the N multiplexed signals.

    Transmission device and transmission method

    公开(公告)号:US12119900B2

    公开(公告)日:2024-10-15

    申请号:US18110543

    申请日:2023-02-16

    IPC分类号: H04B7/0456 H04B1/04 H04L27/20

    摘要: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×Δλ to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses




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    on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.