Efficient allocation of power-of-two terms in complex FIR filter design

The design of discrete coefficient FIR filters with arbitrary magnitude and phase specifictions and whose coefficients are expressed as the signed combination of a few power-of-terms (SPT) is considered. The total number of SPT terms is fixed and their distribution among the coefficients is not restricted. The proposed method is an improved version of those originally proposed for the design of linear phase filters [9], [10].