A novel architecture using the decorrelating transform for low power adaptive filters

This paper presents a novel architecture using the decorrelating (DECOR) transformation technique when applied to an LMS adaptive filter. The DECOR transform has been evaluated previously, however no practical evaluation has previously ever been made of how area and power performance is affected by the addition of the DECOR transform to an LMS adaptive filter. Neither has analysis been carried out to determine any tradeoff in increased area this might incur against power saved. This paper presents the first complete architectural VLSI implementation of the decorrelating transform when applied to an adaptive filter and includes a performance study in terms of area and power.