Multi-carrier transmitter apparatus, multi-carrier receiver apparatus and multi-carrier communication method
OwnerMasaru Fukuoka, Isamu Yoshii +3inventors
InventorsMasaru Fukuoka, Isamu Yoshii, Sadaki Futagi, Atsushi Matsumoto, Takashi Kitahara
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Abstract
Multicarrier transmission apparatus 100 receives channel quality information of subcarriers from multicarrier reception apparatus 200 and interleave pattern setting section 108 sets an interleave pattern according to channel quality of subcarriers. Interleaver 106 interleaves I components and/or Q components of symbols using the set interleave pattern. As a result, it is possible to optimize diversity gains in modulation diversity modulation/demodulation according to channel quality.
Claims16
A multicarrier transmission apparatus comprising:
- a symbol formation section that forms symbols made up of Ich components and Qch components from transmission data;
- an interleaver that interleaves said Ich components and/or Qch components independently of each other;
- an IQ combination section that combines the interleaved Ich components and Qch components and obtains modulation diversity modulation symbols;
- an OFDM modulation section that assigns modulation diversity modulation symbols to any one of a plurality of subcarriers which are orthogonal to one another and modulates subcarriers using the modulation diversity modulation symbols;
- and
- an interleave pattern setting section that sets an interleave pattern in said interleaver according to channel quality of said subcarriers.
(canceled)
A multicarrier reception apparatus comprising:
- an OFDM demodulation section that extracts modulation diversity symbols superimposed on subcarriers of a received multicarrier signal;
- a deinterleaver that deinterleaves Ich components and/or Qch components of said modulation diversity modulation symbols using an interleave pattern according to channel quality of subcarriers;
- an IQ combination section that combines the deinterleaved Ich components and Qch components;
- and
- a demapping section that obtains received data by demapping symbols after the combination.
(canceled)
A multicarrier communication method comprising:
- a step of detecting channel quality of subcarriers;
- and
- a modulation diversity modulation step of carrying out modulation diversity modulation while adaptively changing an interleave pattern of Ich components and/or Qch components according to channel quality of subcarriers.
Dependencies are inferred from the claim text.