Low-complexity hybrid form FIR filters using matrix multiple constant multiplication

Hybrid form FIR filters have been shown to provide a trade-off between the direct form and transposed direct form FIR filters resulting in a low power implementation. However, the use of multiple constant multiplication (MCM) techniques is less advantageous as it results in several MCM blocks. In this work a method of implementing low-complexity hybrid form FIR filters using matrix multiple constant multiplication blocks is proposed. The utilized filter structure can be seen as a polyphase decomposition with common delay lines for the subfilters.