Title :
On delayless subband adaptive filtering by subband/fullband transforms
Author :
Ohno, Shuichi ; Sakai, Hideaki
Author_Institution :
Dept. of Math. & Comput. Sci., Shimane Univ., Matsue, Japan
Abstract :
Delayless subband adaptive digital filters (ADFs) have been proposed to avoid the drawbacks of the conventional subband ADF, which are transmission delay associated with the filterbank and degradation of the performance due to aliasing effects. In the delayless subband ADF, the tap-weight vectors are computed in subbands and then they are transformed into the tap-weight vector in fullband by a certain transform. In this letter, a general formulation for the delayless subband ADF is proposed, and some requirements on the fullband/subband transform are investigated.
Keywords :
adaptive filters; computational complexity; convergence of numerical methods; digital filters; discrete transforms; filtering theory; adaptive digital filters; aliasing effects; delayless subband adaptive filtering; performance degradation; subband/fullband transforms; tap-weight vectors; transmission delay; Adaptive filters; Degradation; Delay effects; Digital filters; Discrete Fourier transforms; Error correction; Filter bank; Filtering; Frequency; Sampling methods;
Journal_Title :
Signal Processing Letters, IEEE
