Subband adaptive noise canceler for hands-free cellular phone applications

Broadband adaptive noise cancellation applications often involve adaptive filter lengths of hundreds of taps. This gives rise to high computational complexity, large misadjustment errors and slow convergence. In this paper subband processing techniques are proposed to get a better noise cancellation in hands-free cellular phones. Simulation results are shown for the traditional and subband adaptive noise canceler (SANC). An average noise reduction of 18 dB is achieved with SANC, as compared to a reduction of 6 dB with traditional ANC