Pipelined architectures for the TD-LMS adaptive filter

In this paper, efficient pipelined architectures for the implementation of the transform domain LMS algorithm, are presented. Pipelining of the TD-LMS algorithm is achieved by introducing an amount of time delay into the original adaptive scheme. The adaptation delay introduced to the TD-LMS algorithm allows for the development of pipelined architectures. By retiming the delays existing in the error feedback loop, two efficient, pipelined implementations of the delayed TD-LMS algorithm are developed.