대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 1999년도 추계종합학술대회 논문집
- /
- Pages.372-375
- /
- 1999
적응적인 대역폭을 이용한 DMT에서의 비트 할당 알고리듬
A Bit Allocation Algorithm Using Adaptive Bandwidth for DMT
초록
This paper proposes a bit allocation algorithm using adaptive bandwidth for ADSL that uses the DMT technology. In certain cases for high attenuation loops the conventional algorithms are unable to assign data bits to the higher frequency tones, due to the power spectrum mask limitation recommended by ANSI Standard, even if the total power budget is not expended. In the proposed bit allocation algorithm, adjacent empty tones that would not be used merge into single tone, then additional bits is assigned to the merged empty tones. Because additional bits is allocated, most of the available power is used. The proposed algorithm show that total bit increase in about 2~9% bits more than about conventional "water-filling" and "bit removal" algorithms and that is able to use about 93% of the available budget Power
키워드