发明申请
- 专利标题： Modulation method and demodulation method achieving high-quality modulation-and-demodulation performance, and modulation apparatus, demodulation apparatus receiving apparatus using the same
- 专利标题（中）： 实现高质量调制解调性能的调制方法和解调方法以及使用其的解调装置接收装置的调制装置
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申请号： US11645793申请日： 2006-12-27
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公开(公告)号： US20070172000A1公开(公告)日： 2007-07-26
- 发明人: Katsuaki Hamamoto , Sanshirou Shiina , Takeshi Sakamoto
- 申请人： Katsuaki Hamamoto , Sanshirou Shiina , Takeshi Sakamoto
- 优先权： JP2005-375607 20051227; JP2006-021386 20060130
- 主分类号： H04L27/00
- IPC分类号： H04L27/00
摘要：
A general purpose of the present invention includes providing a high-quality transmission in a multi-level modulation. Signal points to which symbols are to be assigned are not fixed and the positions of the signal points are varied for each transmission so as to reduce the symbols assigned only to the signal points having low error resilience. The assignment of bits in each symbol and an arrangement rule for the signal points in a QAM modulation scheme are varied per transmission so as to prevent any particular symbol from constantly exhibiting the low error resilience. The error rate is reduced and the throughput is enhanced.
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