Transmission method, reception method, transmitter, and receiver
AssigneePanasonic Intellectual Property Corporation of America
InventorsYutaka Murakami, Tomohiro Kimura, Mikihiro Ouchi
Life of this patent
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Abstract
In a transmission method according to one aspect of the present disclosure, a encoder performs error correction coding on an information bit string to generate a code word. A mapper modulates a first bit string in which the number of bits is the predetermined integral multiple of (X+Y) in the code word using a first scheme, the first scheme being a set of a modulation scheme in which an X-bit bit string is mapped to generate a first complex signal and a modulation scheme in which a Y-bit bit string is mapped to generate a second complex signal, and modulates a second bit string in which the first bit string is removed from the code word using a second scheme different from the first scheme.
Claims1
A transmission method comprising:
- encoding, with an encoder, first information according to a first coding rate and a first coding length to generate a first encoded data sequence, the first coding length being 16200;
- encoding, with the encoder, second information according to the first coding rate and a second coding length to generate a second encoded data sequence, the second coding length being 64800;
- generating an appended data sequence from the first encoded data sequence by appending a part of the first encoded data sequence;
- mapping, with a mapper, the appended data sequence onto 64 signal points defined by a first 64 Quadrature Amplitude Modulation (QAM) scheme to generate a first modulation symbol sequence;
- mapping, with the mapper, the second encoded data sequence onto 64 signal points defined by a second 64 QAM scheme to generate a second modulation symbol sequence;
- transmitting a signal generated based on the first modulation symbol sequence and the second modulation symbol sequence, wherein
- the 64 signal points are representable on an I-Q plane having a real axis and an imaginary axis such that a distance between adjacent signal points has nonuniformity,
- the 64 signal points defined by the first 64 QAM scheme have a first arrangement pattern on the I-Q plane, and
- the 64 signal points defined by the second 64 QAM scheme have a second arrangement pattern on the I-Q plane different from the first arrangement pattern.
Dependencies are inferred from the claim text.