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Signal generation method and signal generation device

  • US 10,644,768 B2
  • Filed: 04/02/2019
  • Issued: 05/05/2020
  • Est. Priority Date: 12/10/2010
  • Status: Active Grant
First Claim
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1. An OFDM signal generation method of a transmission system, the transmission system having a first transmitter and a second transmitter, the OFDM signal generating method comprising:

  • mapping, by the first transmitter, one or more coded blocks to a first mapped signal s1, the one or more coded blocks generated by using a determined error correction block coding scheme;

    mapping, by the second transmitter, the one or more coded blocks to a second mapped signal s2, data included in the first mapped signal s1 being same as data included in the second mapped signal s2;

    inserting, by the first transmitter, one or more pilots to the first mapped signal s1 to obtain a first pilot-inserted signal sp1;

    inserting, by the second transmitter, the one or more pilots to the second mapped signal s2 to obtain a second pilot-inserted signal sp2;

    phase-changing, by the first transmitter, the first pilot-inserted signal sp1 for each of a plurality of slots to obtain a first transmission signal z1 by using a first scheme of a regularly varying phase change process;

    phase-changing, by the second transmitter, the second pilot-inserted signal sp2 for each of the plurality of slots to obtain a second transmission signal z2 by using a second scheme of the regularly varying phase change process;

    converting, by the first transmitter, the first transmission signal z1 for each of the plurality of slots to a first OFDM signal for each of a plurality of subcarriers;

    converting, by the second transmitter, the second transmission signal z2 for each of the plurality of slots to a second OFDM signal for each of the plurality of subcarriers;

    inserting, by the first transmitter, one or more first symbols to enable synchronization to the first OFDM signal to be transmitted from a first antenna at a first period at a first frequency; and

    inserting, by the second transmitter, one or more second symbols to enable synchronization to the second OFDM signal to be transmitted from a second antenna at the first period at the first frequency.

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