| 摘要 |
PROBLEM TO BE SOLVED: To provide a modem for a transmission system for enabling a single modem to effectively utilize a number of DSL standards with low complexity. SOLUTION: A digital subscriber line transmission using QAM modulation on several equally spaced discrete tones, uses, at a high transmission rate, N=2048/p or 4096/p tones spaced by 4.3125p kHz, where (p) is a power of 2. COPYRIGHT: (C)2005,JPO&NCIPI
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