Low power FIR filter implementations based on coefficient ordering algorithm

The authors present a number of low power FIR filter implementations. The implementations are based on processing coefficients in a non-conventional order using both direct form and transpose direct form realisation of FIR filters. The paper describes the overall filter architecture of each implementation and their key components. An overall power reduction of up to 34% is reported as compared to a conventional filter implementation. A power profile of the main contributing components in each implementation is also provided.