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US 2018/0294854 A1Published application
Precoding method, precoding device
AssigneeSun Patent Trust
InventorsYutaka MURAKAMI, Tomohiro KIMURA, Mikihiro OUCHI
Life of this patent
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Abstract
Disclosed is a precoding method for generating, from a plurality of baseband signals, a plurality of precoded signals that are transmitted in the same frequency bandwidth at the same time. According to the precoding method, one matrix is selected from among matrices defining a precoding process that is performed on the plurality of baseband signals by hopping between the matrices. A first baseband signal and a second baseband signal relating to a first coded block and a second coded block generated by using a predetermined error correction block coding scheme satisfy a given condition.
Claims4
A transmission apparatus comprising:
- encoding circuitry, which in operation, encodes a transmission data sequence to two encoded data sequences that are to be decoded by a reception apparatus;
- modulation circuitry, which in operation, modulates the two encoded data sequences to two modulated symbol sequences;
- precoding circuitry, which in operation, precodes the two modulated symbol sequences by hopping a precoding matrix expressed by Math. 1 for each symbol to generate two precoded symbol sequences;
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- OFDM signal generation circuitry, which in operation, inverse fourier transforms the two precoded symbol sequences to two OFDM signals;
- and
- transmission circuitry, which in operation, transmits the two OFDM signals at the same frequency in the same transmission slot from different antennas, wherein
- in Math. 1, α=1, and θ21 satisfies Math. 2,
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96 more elements
A transmission method comprising:
- encoding a transmission data sequence to two encoded data sequences that are to be decoded by a reception apparatus;
- modulating the two encoded data sequences to two modulated symbol sequences;
- precoding the two modulated symbol sequences by hopping a precoding matrix expressed by Math. 3 for each symbol to generate two precoded symbol sequences;
- [
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- 3
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- i
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- 2
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- Inverse fourier transforming the two precoded symbol sequences to two OFDM signals;
- and
- transmitting the two OFDM signals at the same frequency in the same transmission slot from different antennas, wherein
- in Math. 3, α=1, and θ21 satisfies Math. 4,
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96 more elements
A reception device comprising:
- reception circuitry, which in operation, receive signals including two OFDM signals transmitted from different antennas of a transmission apparatus;
- decoding circuitry, which in operation, decode the receive signals to a transmission data sequence, wherein
- the two OFDM signals are transmitted from the transmission apparatus through processing including:
- encoding of the transmission data sequence to the two encoded data sequences;
- modulation of the two encoded data sequences to two modulated symbol sequences;
- precoding the two modulated symbol sequences by hopping a precoding matrix expressed by Math. 5 for each symbol to generating two precoded symbol sequences;
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- inverse fourier transforming the two precoded symbol sequences to two OFDM signals;
- and
- transmission of the two OFDM signals at the same frequency in the same transmission slot from the different antennas,
- in Math. 5, α=1, and θ21 satisfies Math. 6,
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99 more elements
A reception method comprising:
- receiving signals including two OFDM signals transmitted from different antennas of a transmission apparatus;
- decoding the receive signals to a transmission data sequence, wherein
- the two OFDM signals are transmitted from the transmission apparatus through processing including:
- encoding of the transmission data sequence to the two encoded data sequences;
- modulation of the two encoded data sequences to two modulated symbol sequences;
- precoding the two modulated symbol sequences by hopping a precoding matrix expressed by Math. 7 for each symbol to generate two precoded symbol sequences;
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- inverse fourier transforming the two precoded symbol sequences to two OFDM signals;
- and
- transmission of the two precoded symbol sequences at the same frequency in the same transmission slot from the different antennas,
- in Math. 7, α=1, and θ21 satisfies Math. 8,
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- 8
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99 more elements
Dependencies are inferred from the claim text.