DMT-ADSL系统的自适应均衡  

Adaptive Equalization for DMT-ADSL Systems

作　　者：石文孝[1] 迟学芬[2] 刘长捷[2] 

机构地区：[1]吉林大学通信工程与技术学院,长春130012 [2]空军第二航空学院,长春130022

出　　处：《吉林大学自然科学学报》2001年第3期63-66,共4页Acta Scientiarum Naturalium Universitatis Jilinensis

基　　金：信息产业部重点科技发展计划项目基金 (批准号 :970 65 )

摘　　要：提出一种基于离散多频音调制非对称数字用户线 ( DMT-ADSL )系统的时域均衡器( TEQ) ,其 SNR在任意带宽占用情况下都为最大 .在时域和频域中实现这种自适应 TEQ的算法 .用计算机仿真比较了时域算法与频域算法的收敛性 .结果表明 ,两种算法收敛速度比较满意 ,并且频域算法有更快的收敛速度和更小的均方误差 ( MSE)偏差 .A new time domain equalizer in DMT ADSL is proposed in this paper. It is shown that the new TEQ maximizes the SNR regardless of bandwidth occupancy. Two adaptation algorithms were developed in the time and frequency domains. The astringency of the time domain algorithm was compared with that of frequency domain algorithm by the computer simulation. It is shown from the simulation that the two algorithms converge at a satisfactory speed and the frequency domain algorithm offers a slightly faster convergence and a smaller excess mean square error.

关 键 词：自适应均衡 离散多频音调制 数字用户线 

分 类 号：TN915.61[电子电信—通信与信息系统] TN911.5[电子电信—信息与通信工程]