| 摘要 |
PROBLEM TO BE SOLVED: To provide dynamic tone grouping and coding of multi-carrier QAM during OFDM.SOLUTION: A sequence of encoded and interleaved bits is separated into a large number of bit streams b-b. Each bit stream is mapped to a sequence of QAM codes, and the QAM code sequence is divided into QAM codes s-sof non-overlapping set. Thereafter, the QAM codes are subjected to unitary conversion, and a group of composite signals x-xis generated. Finally, the composite signals are mapped to a sub-carrier group y-ybased on the tone mapping information, and the link performance is improved. |
