Abstract:

To further improve the steady-state performance of the convex combination of adaptive filter for variable fractional tap-length least mean square (CFTLMS) algorithms, a convex combination of variable width (VW) and variable tap-length adaptive filtering algorithm is proposed based on the proof of the steady-state performance of CFTLMS algorithm, and the choice principles of parameters are given. Simulation results show the correctness of steady-state performance analysis and parameter selection principles of the VW-CFTLMS algorithm under lower SNR condition, and the steady-state performance of the algorithm is superior to that of the CFTLMS algorithm, of which the excess mean square error is lowered by about 1.8 dB.