VDSL채널에서 정규화된 MMA 방법을 이용한 블라인드 적응 등화 기법 = The Adaptive Blind Equalization Method Using Normalized Multimodulus Algorithm in VDSL Channel

다국어 초록 (Multilingual Abstract)

VDSL technology can transmit data at rate of 10-50Mbps over a twisted-pair copper telephone loops. Therefore, one of VDSL core technology is channel equalizer. Because one of the most damaging impairments is linear distortion introduced by cable and RF interference. An adaptive equalizer needs to be trained before reliable transfer of information can be achieved. This can be done in two main ways. One way is to using priori known training sequence. The ocher way is not to using training sequence. This type of initial training of an equalizer is called blind equalization. Blind equalization provide bandwidth-efficient schemes. In this paper we propose dual mode SCS(Soft Constraint Satisfaction)-Multimodulus algorithm derived from the combination of SCS algorithms and decision-directed algorithm. This algorithms provide fast convergence speed and robustness. Using MATLAB, we investigate the performance of dual made SCS-MMA over VDSL test loops.

목차 (Table of Contents)

• Ⅰ.서론
• Ⅱ.VDSL 채널 모델링
• 2.1 디지털 통신 시스템
• 2.2 VDSL 선로 모델링
• Ⅲ.블라인드 적응등화기법
• 3.1 RCA 기법
• 3.2 CMA 기법
• 3.3 MMA 기법
• Ⅳ.제안된 NMMA 기법
• 4.1 SCS-MMA 기법
• 4.2 이중모드 SCS-MMA 기법
• Ⅴ.실험 결과
• Ⅵ.결론